深入浅出Android dmabuf_dump工具
发布时间：2024年01月11日
dmabuf是什么？
?可以参考我之前写的一篇文章，在这篇文章中有介绍dma_buf：BufferManager_驱动的buffermanager-CSDN博客
dmabuf_dump工具介绍(基于Android 14)
dmabuf_dump是一个可执行文件，接收参数调用libdmabufinfo.a的接口完成dump功能，源码在：system/memory/libmeminfo/libdmabufinfo/tools/
安卓源代码目录下主要有下面2个文件，一个 Android.bp ，一个是 dmabuf_dump.cpp
Android.bp
// Copyright (C) 2019 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package {
default_applicable_licenses: ["Android-Apache-2.0"],
}
cc_binary {
name: "dmabuf_dump",
cflags: [
"-Wall",
"-Werror",
],
srcs: ["dmabuf_dump.cpp"],
shared_libs: [
"libbase",
],
static_libs: [
"libdmabufinfo",
],
vendor_available: true,
}dmabuf_dump.cpp
xref: /mivendor_u_sm8650/system/memory/libmeminfo/libdmabufinfo/tools/dmabuf_dump.cpp (revision unknown)
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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <dirent.h>
#include <errno.h>
#include <getopt.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fstream>
#include <iostream>
#include <map>
#include <set>
#include <sstream>
#include <string>
#include <vector>
#include <android-base/stringprintf.h>
#include <dmabufinfo/dmabufinfo.h>
#include <dmabufinfo/dmabuf_sysfs_stats.h>
using DmaBuffer = ::android::dmabufinfo::DmaBuffer;
[[noreturn]] static void usage(int exit_status) {
fprintf(stderr,
"Usage: %s [-abh] [per-process/per-buffer stats] \n"
"-a\t show all dma buffers (ion) in big table, [buffer x process] grid \n"
"-b\t show DMA-BUF per-buffer, per-exporter and per-device statistics \n"
"-h\t show this help\n"
" \t If PID is supplied, the dmabuf information for that process is shown.\n"
" \t Per-buffer DMA-BUF stats do not take an argument.\n",
getprogname());
exit(exit_status);
}
static std::string GetProcessComm(const pid_t pid) {
std::string pid_path = android::base::StringPrintf("/proc/%d/comm", pid);
std::ifstream in{pid_path};
if (!in) return std::string("N/A");
std::string line;
std::getline(in, line);
if (!in) return std::string("N/A");
return line;
}
static void PrintDmaBufTable(const std::vector<DmaBuffer>& bufs) {
if (bufs.empty()) {
printf("dmabuf info not found ˉ\\_(ツ)_/ˉ\n");
return;
}
// Find all unique pids in the input vector, create a set
std::set<pid_t> pid_set;
for (auto& buf : bufs) {
pid_set.insert(buf.pids().begin(), buf.pids().end());
}
// Format the header string spaced and separated with '|'
printf(" Dmabuf Inode | Size | Fd Ref Counts | Map Ref Counts |");
for (auto pid : pid_set) {
printf("%16s:%-5d |", GetProcessComm(pid).c_str(), pid);
}
printf("\n");
// holds per-process dmabuf size in kB
std::map<pid_t, uint64_t> per_pid_size = {};
uint64_t dmabuf_total_size = 0;
// Iterate through all dmabufs and collect per-process sizes, refs
for (auto& buf : bufs) {
printf("%16ju |%13" PRIu64 " kB |%16zu |%16zu |",
static_cast<uintmax_t>(buf.inode()), buf.size() / 1024, buf.fdrefs().size(),
buf.maprefs().size());
// Iterate through each process to find out per-process references for each buffer,
// gather total size used by each process etc.
for (pid_t pid : pid_set) {
int pid_fdrefs = 0, pid_maprefs = 0;
if (buf.fdrefs().count(pid) == 1) {
// Get the total number of ref counts the process is holding
// on this buffer. We don't differentiate between mmap or fd.
pid_fdrefs += buf.fdrefs().at(pid);
}
if (buf.maprefs().count(pid) == 1) {
pid_maprefs += buf.maprefs().at(pid);
}
if (pid_fdrefs || pid_maprefs) {
// Add up the per-pid total size. Note that if a buffer is mapped
// in 2 different processes, the size will be shown as mapped or opened
// in both processes. This is intended for visibility.
//
// If one wants to get the total *unique* dma buffers, they can simply
// sum the size of all dma bufs shown by the tool
per_pid_size[pid] += buf.size() / 1024;
printf("%9d(%6d) refs |", pid_fdrefs, pid_maprefs);
} else {
printf("%22s |", "--");
}
}
dmabuf_total_size += buf.size() / 1024;
printf("\n");
}
printf("------------------------------------\n");
printf("%-16s %13" PRIu64 " kB |%16s |%16s |", "TOTALS", dmabuf_total_size, "n/a", "n/a");
for (auto pid : pid_set) {
printf("%19" PRIu64 " kB |", per_pid_size[pid]);
}
printf("\n");
return;
}
static void PrintDmaBufPerProcess(const std::vector<DmaBuffer>& bufs) {
if (bufs.empty()) {
printf("dmabuf info not found ˉ\\_(ツ)_/ˉ\n");
return;
}
// Create a reverse map from pid to dmabufs
std::unordered_map<pid_t, std::set<ino_t>> pid_to_inodes = {};
uint64_t userspace_size = 0; // Size of userspace dmabufs in the system
for (auto& buf : bufs) {
for (auto pid : buf.pids()) {
pid_to_inodes[pid].insert(buf.inode());
}
userspace_size += buf.size();
}
// Create an inode to dmabuf map. We know inodes are unique..
std::unordered_map<ino_t, DmaBuffer> inode_to_dmabuf;
for (auto buf : bufs) {
inode_to_dmabuf[buf.inode()] = buf;
}
uint64_t total_rss = 0, total_pss = 0;
for (auto& [pid, inodes] : pid_to_inodes) {
uint64_t pss = 0;
uint64_t rss = 0;
printf("%16s:%-5d\n", GetProcessComm(pid).c_str(), pid);
printf("%22s %16s %16s %16s %16s\n", "Name", "Rss", "Pss", "nr_procs", "Inode");
for (auto& inode : inodes) {
DmaBuffer& buf = inode_to_dmabuf[inode];
printf("%22s %13" PRIu64 " kB %13" PRIu64 " kB %16zu %16" PRIuMAX "\n",
buf.name().empty() ? "<unknown>" : buf.name().c_str(), buf.size() / 1024,
buf.Pss() / 1024, buf.pids().size(), static_cast<uintmax_t>(buf.inode()));
rss += buf.size();
pss += buf.Pss();
}
printf("%22s %13" PRIu64 " kB %13" PRIu64 " kB %16s\n", "PROCESS TOTAL", rss / 1024,
pss / 1024, "");
printf("----------------------\n");
total_rss += rss;
total_pss += pss;
}
uint64_t kernel_rss = 0; // Total size of dmabufs NOT mapped or opened by a process
if (android::dmabufinfo::GetDmabufTotalExportedKb(&kernel_rss)) {
kernel_rss *= 1024; // KiB -> bytes
if (kernel_rss >= userspace_size)
kernel_rss -= userspace_size;
else
printf("Warning: Total dmabufs < userspace dmabufs\n");
} else {
printf("Warning: Could not get total exported dmabufs. Kernel size will be 0.\n");
}
printf("dmabuf total: %" PRIu64 " kB kernel_rss: %" PRIu64 " kB userspace_rss: %" PRIu64
" kB userspace_pss: %" PRIu64 " kB\n ",
(userspace_size + kernel_rss) / 1024, kernel_rss / 1024, total_rss / 1024,
total_pss / 1024);
}
static void DumpDmabufSysfsStats() {
android::dmabufinfo::DmabufSysfsStats stats;
if (!android::dmabufinfo::GetDmabufSysfsStats(&stats)) {
printf("Unable to read DMA-BUF sysfs stats from device\n");
return;
}
auto buffer_stats = stats.buffer_stats();
auto exporter_stats = stats.exporter_info();
printf("\n\n----------------------- DMA-BUF per-buffer stats -----------------------\n");
printf(" Dmabuf Inode | Size(bytes) | Exporter Name |\n");
for (const auto& buf : buffer_stats) {
printf("%16lu |%" PRIu64 " | %16s \n", buf.inode, buf.size, buf.exp_name.c_str());
}
printf("\n\n----------------------- DMA-BUF exporter stats -----------------------\n");
printf(" Exporter Name | Total Count | Total Size(bytes) |\n");
for (const auto& it : exporter_stats) {
printf("%32s | %12u| %" PRIu64 "\n", it.first.c_str(), it.second.buffer_count,
it.second.size);
}
printf("\n\n----------------------- DMA-BUF total stats --------------------------\n");
printf("Total DMA-BUF count: %u, Total DMA-BUF size(bytes): %" PRIu64 "\n", stats.total_count(),
stats.total_size());
}
int main(int argc, char* argv[]) {
struct option longopts[] = {{"all", no_argument, nullptr, 'a'},
{"per-buffer", no_argument, nullptr, 'b'},
{"help", no_argument, nullptr, 'h'},
{0, 0, nullptr, 0}};
int opt;
bool show_table = false;
bool show_dmabuf_sysfs_stats = false;
while ((opt = getopt_long(argc, argv, "abh", longopts, nullptr)) != -1) {
switch (opt) {
case 'a':
show_table = true;
break;
case 'b':
show_dmabuf_sysfs_stats = true;
break;
case 'h':
usage(EXIT_SUCCESS);
default:
usage(EXIT_FAILURE);
}
}
pid_t pid = -1;
if (optind < argc) {
if (show_table || show_dmabuf_sysfs_stats) {
fprintf(stderr, "Invalid arguments: -a and -b does not need arguments\n");
usage(EXIT_FAILURE);
}
if (optind != (argc - 1)) {
fprintf(stderr, "Invalid arguments - only one [PID] argument is allowed\n");
usage(EXIT_FAILURE);
}
pid = atoi(argv[optind]);
if (pid == 0) {
fprintf(stderr, "Invalid process id %s\n", argv[optind]);
usage(EXIT_FAILURE);
}
}
if (show_dmabuf_sysfs_stats) {
DumpDmabufSysfsStats();
return 0;
}
std::vector<DmaBuffer> bufs;
if (pid != -1) {
if (!ReadDmaBufInfo(pid, &bufs)) {
fprintf(stderr, "Unable to read dmabuf info for %d\n", pid);
exit(EXIT_FAILURE);
}
} else {
if (!ReadProcfsDmaBufs(&bufs)) {
fprintf(stderr, "Failed to ReadProcfsDmaBufs, check logcat for info\n");
exit(EXIT_FAILURE);
}
}
// Show the old dmabuf table, inode x process
if (show_table) {
PrintDmaBufTable(bufs);
return 0;
}
PrintDmaBufPerProcess(bufs);
return 0;
}
整体架构结构如下
?
dmabuf_dump主要包含以下功能
- Dump整个系统DMA-BUF per-buffer, per-exporter and per-device statistics(dmabuf_dump -b)，在kernel版本>= 5.10上生效。
- Dump整个系统的dmabuf info (dmabuf_dump)
- Dump某个PID的dmabuf info (dmabuf_dump?)
- 以Table[buffer x process]方式呈现dmabuf info (dmabuf_dump -a)
前置背景知识
- Rss的含义：是当前段实际加载到物理内存中的大小。
- Pss 指的是：进程按比例分配当前段所占物理内存的大小。
- 下面dump整个手机系统在某一时刻的 dmabuf信息，可以看到有 binder进程的dmabuf信息、surfaceflinger进程的dmabuf信息、system_server进程的dmabuf信息等等。
- nr_procs是指有多少个进程在使用这块dmabuf。
- Name是指dmabuf的名字
- Inode是这块 dmabuf的唯一标识，注意Inode是全局唯一的。
- PROCESS TOTAL 是统计 Rss 或者 Pss的总和。
- dmabuf total 是整个系统dambuf的总和
- userspace_rss 是用户空间 rss的总和。
- userspace_pss 是用户空间 pss的总和。
- kernel_rss 目前初步认为是 内核空间rss的总和，但不特别准确，这个kernel_rss大有来头，后面有时间详细深度剖析。真实的项目过程中，会偶先?kernel_rss占用过大，或泄露的情况，这种问题还特别难分析和解决。
fdinfo
/proc/<pid>/fdinfo/?下面的所有fd，针对每个fd读取如下信息:
- count
- exp_name，有exp_name则表示是 dmabuf 的file。
- name
- size
- ino：inode
以下是camera provider的 fdinfo
wj@wj:~/Downloads$ adb shell ps -e | grep camera
cameraserver 1601 1 14307344 680656 binder_ioctl_write_read 0 S vendor.qti.camera.provider-service_64
cameraserver 2785 1 2720288 25620 binder_ioctl_write_read 0 S cameraserver
u0_a139 11065 1444 9305388 343752 do_epoll_wait 0 S com.android.camera
wj@wj:~/Downloads$ adb shell
aurora:/ # cd /proc/1601/fdinfo/
aurora:/proc/1601/fdinfo # ls
0 110 1137 117 123 15 19 22 26 3 33 36 383 399 406 43 47 50 54 56 6 63 67 7 73 745 751 79 82 899
1 111 114 118 124 16 2 23 27 30 336 37 384 4 407 44 48 51 55 57 60 64 68 70 731 748 76 8 84 9
10 112 115 121 13 17 20 24 28 31 34 38 386 40 41 45 49 52 557 58 61 65 687 71 74 75 77 80 85
11 113 116 122 14 18 21 25 29 32 35 382 39 400 42 46 5 53 558 59 62 66 69 72 743 750 78 81 86
可以看到 fdinfo 有以下这些：
aurora:/proc/1601/fdinfo # ls
0 110 1137 117 123 15 19 22 26 3 33 36 383 399 406 43 47 50 54 56 6 63 67 7 73 745 751 79 82 899
1 111 114 118 124 16 2 23 27 30 336 37 384 4 407 44 48 51 55 57 60 64 68 70 731 748 76 8 84 9
10 112 115 121 13 17 20 24 28 31 34 38 386 40 41 45 49 52 557 58 61 65 687 71 74 75 77 80 85
11 113 116 122 14 18 21 25 29 32 35 382 39 400 42 46 5 53 558 59 62 66 69 72 743 750 78 81 86思考
我们知道每一个进程都有一个 fd，用户空间不同进程的 fd，是可以共享内核空间的同一块 dmabuf的，那么怎么样找到进程 fd 和对应 dmabuf的对应关系呢？
那么这个时候 inode 就要出场了，因为 dmabuf的inode是唯一确定的，所以这个时候我们可以把同一时刻的，这个进程的 dmabuf_dump给 dump下来，如下所示。
wj@wj:~$ adb shell ps -e | grep camera
cameraserver 1601 1 14307344 680656 binder_ioctl_write_read 0 S vendor.qti.camera.provider-service_64
cameraserver 2785 1 2720288 25620 binder_ioctl_write_read 0 S cameraserver
u0_a139 11065 1444 9305388 343752 do_epoll_wait 0 S com.android.camera
wj@wj:~$ adb shell dmabuf_dump 1601
vendor.qti.came:1601
Name Rss Pss nr_procs Inode
system 4 kB 4 kB 1 134
system 4 kB 4 kB 1 135
system 4 kB 4 kB 1 723
system 4 kB 4 kB 1 724
system 4 kB 4 kB 1 725
system 4320 kB 4320 kB 1 727
system 736 kB 736 kB 1 729
system 148 kB 148 kB 1 731
system 32768 kB 32768 kB 1 733
system 4 kB 4 kB 1 996
system 4 kB 4 kB 1 1010
system 4 kB 4 kB 1 1011
system 736 kB 736 kB 1 1017
system 148 kB 148 kB 1 1019
system 6848 kB 6848 kB 1 1342
system 1024 kB 1024 kB 1 1359
system 32768 kB 32768 kB 1 1363
system 4 kB 4 kB 1 1367
system 4 kB 4 kB 1 1371
system 4 kB 4 kB 1 1372
PROCESS TOTAL 79540 kB 79540 kB
----------------------
dmabuf total: 298652 kB kernel_rss: 219112 kB userspace_rss: 79540 kB userspace_pss: 79540 kB然后我们可以用 grep -nr 命令进行查看，如下所示：
aurora:/proc/1601/fdinfo # grep -nr 733
./124:4:ino: 733
aurora:/proc/1601/fdinfo # grep -nr 1372
./751:4:ino: 1372
?inode为733的dmabuf 所对应的进程为：124
?inode为1372的dmabuf所对应的进程为：751
bufinfo
我们可以通过获取 bufferinfo 来获取 dmabuf的详细信息。
adb shell cat /sys/kernel/debug/dma_buf/bufinfo
wj@wj:~/Downloads$ adb shell cat /sys/kernel/debug/dma_buf/bufinfo
Dma-buf Objects:
size flags mode count exp_name ino name
00032768 00000002 00080007 00000002 qcom,system 00002275 qcom,system
Attached Devices:
Total 0 devices attached
00770048 00000002 00080007 00000001 qcom,system 00002274 qcom,system
Attached Devices:
Total 0 devices attached
00032768 00000002 00080007 00000002 qcom,system 00002273 qcom,system
Attached Devices:
Total 0 devices attached
00770048 00000002 00080007 00000001 qcom,system 00002272 qcom,system
Attached Devices:
Total 0 devices attached
00032768 00000002 00080007 00000002 qcom,system 00002271 qcom,system
Attached Devices:
Total 0 devices attached
00770048 00000002 00080007 00000001 qcom,system 00002270 qcom,system
Attached Devices:
Total 0 devices attached
00032768 00000002 00080007 00000004 qcom,system 00002269 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000004 qcom,system 00002268 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000002 qcom,system 00002267 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000001 qcom,system 00002266 qcom,system
Attached Devices:
Total 0 devices attached
00032768 00000002 00080007 00000002 qcom,system 00002265 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000001 qcom,system 00002264 qcom,system
Attached Devices:
Total 0 devices attached
00032768 00000002 00080007 00000002 qcom,system 00002263 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000001 qcom,system 00002262 qcom,system
Attached Devices:
Total 0 devices attached
00032768 00000002 00080007 00000004 qcom,system 00002261 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000004 qcom,system 00002260 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00002249 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000003 qcom,system 00002248 qcom,system
Attached Devices:
kgsl-3d0
Total 1 devices attached
00032768 00000002 00080007 00000004 qcom,system 00002188 qcom,system
Attached Devices:
Total 0 devices attached
10444800 00000002 00080007 00000003 qcom,system 00002187 qcom,system
Attached Devices:
kgsl-3d0
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00002039 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb5
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00002034 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb5
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00002033 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb5
Total 1 devices attached
33554432 00000002 00080007 00000003 system 00002029 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb5
Total 1 devices attached
00151552 00000002 00080007 00000003 system 00002025 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb5
Total 1 devices attached
00106496 00000002 00080007 00000002 system 00002018 system
Attached Devices:
Total 0 devices attached
00753664 00000002 00080007 00000003 system 00002017 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb5
Total 1 devices attached
07012352 00000002 00080007 00000003 system 00002008 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb5
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00002005 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb5
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00002004 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb5
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00001958 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb5
Total 1 devices attached
00032768 00000002 00080007 00000002 qcom,system 00001953 qcom,system
Attached Devices:
Total 0 devices attached
10444800 00000002 00080007 00000001 qcom,system 00001952 qcom,system
Attached Devices:
Total 0 devices attached
00032768 00000002 00080007 00000002 qcom,system 00001502 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000002 qcom,system 00001501 qcom,system
Attached Devices:
kgsl-3d0
Total 1 devices attached
00073728 00000002 00080007 00000002 qcom,system 00001460 qcom,system
Attached Devices:
Total 0 devices attached
02506752 00000002 00080007 00000002 qcom,system 00001459 qcom,system
Attached Devices:
kgsl-3d0
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00001372 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb4
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00001371 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb4
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00001367 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb4
Total 1 devices attached
33554432 00000002 00080007 00000003 system 00001363 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb4
Total 1 devices attached
01048576 00000002 00080007 00000003 system 00001359 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb4
Total 1 devices attached
07012352 00000002 00080007 00000003 system 00001342 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb4
Total 1 devices attached
00151552 00000002 00080007 00000003 system 00001019 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb4
Total 1 devices attached
00753664 00000002 00080007 00000003 system 00001017 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb4
Total 1 devices attached
00004096 00000002 00080007 00000002 system 00001011 system
Attached Devices:
Total 0 devices attached
00004096 00000002 00080007 00000003 system 00001010 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb4
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00000996 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb4
Total 1 devices attached
33554432 00000002 00080007 00000003 system 00000733 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb3
Total 1 devices attached
00151552 00000002 00080007 00000003 system 00000731 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb3
Total 1 devices attached
00753664 00000002 00080007 00000003 system 00000729 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb3
Total 1 devices attached
04423680 00000002 00080007 00000003 system 00000727 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb3
Total 1 devices attached
00004096 00000002 00080007 00000002 system 00000725 system
Attached Devices:
Total 0 devices attached
00004096 00000002 00080007 00000003 system 00000724 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb3
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00000723 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb3
Total 1 devices attached
00032768 00000002 00080007 00000002 qcom,system 00000669 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000002 qcom,system 00000668 qcom,system
Attached Devices:
kgsl-3d0
Total 1 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000665 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000005 qcom,system 00000664 qcom,system
Attached Devices:
soc:qcom,smmu_sde_unsec_cb
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000663 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000004 qcom,system 00000662 qcom,system
Attached Devices:
soc:qcom,smmu_sde_unsec_cb
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000343 qcom,system
Attached Devices:
Total 0 devices attached
00491520 00000002 00080007 00000004 qcom,system 00000342 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000341 qcom,system
Attached Devices:
Total 0 devices attached
00491520 00000002 00080007 00000004 qcom,system 00000340 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000339 qcom,system
Attached Devices:
Total 0 devices attached
00491520 00000002 00080007 00000004 qcom,system 00000338 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000337 qcom,system
Attached Devices:
Total 0 devices attached
00491520 00000002 00080007 00000004 qcom,system 00000336 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000002 qcom,system 00000321 qcom,system
Attached Devices:
Total 0 devices attached
00131072 00000002 00080007 00000003 qcom,system 00000320 qcom,system
Attached Devices:
kgsl-3d0
Total 1 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000319 qcom,system
Attached Devices:
Total 0 devices attached
00212992 00000002 00080007 00000004 qcom,system 00000318 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000317 qcom,system
Attached Devices:
Total 0 devices attached
00212992 00000002 00080007 00000004 qcom,system 00000316 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000315 qcom,system
Attached Devices:
Total 0 devices attached
00212992 00000002 00080007 00000004 qcom,system 00000314 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000313 qcom,system
Attached Devices:
Total 0 devices attached
00212992 00000002 00080007 00000004 qcom,system 00000312 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000311 qcom,system
Attached Devices:
Total 0 devices attached
00352256 00000002 00080007 00000004 qcom,system 00000310 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000309 qcom,system
Attached Devices:
Total 0 devices attached
00974848 00000002 00080007 00000004 qcom,system 00000308 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000307 qcom,system
Attached Devices:
Total 0 devices attached
00974848 00000002 00080007 00000004 qcom,system 00000306 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000305 qcom,system
Attached Devices:
Total 0 devices attached
00974848 00000002 00080007 00000004 qcom,system 00000304 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000303 qcom,system
Attached Devices:
Total 0 devices attached
00974848 00000002 00080007 00000004 qcom,system 00000302 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000293 qcom,system
Attached Devices:
Total 0 devices attached
00974848 00000002 00080007 00000004 qcom,system 00000292 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000291 qcom,system
Attached Devices:
Total 0 devices attached
00974848 00000002 00080007 00000004 qcom,system 00000290 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000289 qcom,system
Attached Devices:
Total 0 devices attached
00974848 00000002 00080007 00000004 qcom,system 00000288 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000286 qcom,system
Attached Devices:
Total 0 devices attached
00974848 00000002 00080007 00000004 qcom,system 00000285 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000258 qcom,system
Attached Devices:
Total 0 devices attached
00352256 00000002 00080007 00000004 qcom,system 00000257 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000220 qcom,system
Attached Devices:
Total 0 devices attached
00393216 00000002 00080007 00000004 qcom,system 00000219 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000218 qcom,system
Attached Devices:
Total 0 devices attached
00393216 00000002 00080007 00000004 qcom,system 00000217 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000216 qcom,system
Attached Devices:
Total 0 devices attached
00393216 00000002 00080007 00000004 qcom,system 00000215 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000214 qcom,system
Attached Devices:
Total 0 devices attached
00393216 00000002 00080007 00000004 qcom,system 00000213 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00020480 00000002 00080007 00000003 qcom,system 00000172 qcom,system
Attached Devices:
soc:qcom,smmu_sde_unsec_cb
Total 1 devices attached
00020480 00000002 00080007 00000003 qcom,system 00000171 qcom,system
Attached Devices:
soc:qcom,smmu_sde_unsec_cb
Total 1 devices attached
00020480 00000002 00080007 00000003 qcom,system 00000170 qcom,system
Attached Devices:
soc:qcom,smmu_sde_unsec_cb
Total 1 devices attached
00032768 00000002 00080007 00000002 qcom,system 00000167 qcom,system
Attached Devices:
Total 0 devices attached
14745600 00000002 00080007 00000003 qcom,system 00000166 qcom,system
Attached Devices:
soc:qcom,smmu_sde_unsec_cb
Total 1 devices attached
02097152 00000002 00080007 00000002 qcom,qseecom 00000165 qcom,qseecom
Attached Devices:
Total 0 devices attached
00004096 00000002 00080007 00000002 qcom,qseecom 00000164 qcom,qseecom
Attached Devices:
Total 0 devices attached
00012288 00000002 00080007 00000002 qcom,qseecom 00000162 qcom,qseecom
Attached Devices:
Total 0 devices attached
00262144 00000002 00080007 00000003 system 00000160 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb1
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00000158 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb1
Total 1 devices attached
00262144 00000002 00080007 00000003 system 00000157 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb10
Total 1 devices attached
00004096 00000002 00080007 00000002 system 00000156 system
Attached Devices:
Total 0 devices attached
00004096 00000002 00080007 00000003 system 00000155 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb10
Total 1 devices attached
00032768 00000002 00080007 00000003 system 00000154 <none>
Attached Devices:
soc:spf_core_platform:qcom,msm-audio-ion
Total 1 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000153 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000005 qcom,system 00000152 qcom,system
Attached Devices:
soc:qcom,smmu_sde_unsec_cb
kgsl-3d0
Total 2 devices attached
00004096 00000002 00080007 00000002 system 00000135 system
Attached Devices:
Total 0 devices attached
00004096 00000002 00080007 00000003 system 00000134 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb11
Total 1 devices attached
00004096 00000002 00080007 00000002 system 00000079 system
Attached Devices:
Total 0 devices attached
00004096 00000002 00080007 00000003 system 00000078 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb12
Total 1 devices attached
00032768 00000002 00080007 00000002 qcom,system 00000074 qcom,system
Attached Devices:
Total 0 devices attached
00065536 00000002 00080007 00000002 qcom,system 00000073 qcom,system
Attached Devices:
kgsl-3d0
Total 1 devices attached
00004096 00000002 00080007 00000002 system 00000072 system
Attached Devices:
Total 0 devices attached
00004096 00000002 00080007 00000003 system 00000071 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb11
Total 1 devices attached
00004096 00000002 00080007 00000002 qcom,qseecom 00000057 qcom,qseecom
Attached Devices:
Total 0 devices attached
00004096 00000002 00080007 00000002 system 00000048 system
Attached Devices:
Total 0 devices attached
00004096 00000002 00080007 00000003 system 00000047 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb2
Total 1 devices attached
00008192 00000002 00080007 00000002 qcom,qseecom 00000046 qcom,qseecom
Attached Devices:
Total 0 devices attached
00008192 00000002 00080007 00000002 qcom,qseecom 00000045 qcom,qseecom
Attached Devices:
Total 0 devices attached
01200128 00000002 00080007 00000001 qcom,system 00000043 <none>
Attached Devices:
soc:qcom,cam_smmu:msm_cam_smmu_icp
Total 1 devices attached
00024576 00000002 00080007 00000002 qcom,qseecom 00000036 qcom,qseecom
Attached Devices:
Total 0 devices attached
01048576 00000000 00080005 00000001 qcom,system 00000018 <none>
Attached Devices:
ab00000.qcom,cvp:cvp_non_secure_cb
Total 1 devices attached
03141632 00000000 00080005 00000001 qcom,system 00000017 <none>
Attached Devices:
ab00000.qcom,cvp:cvp_non_secure_cb
Total 1 devices attached
00004096 00000002 00080007 00000002 qcom,qseecom 00000016 qcom,qseecom
Attached Devices:
Total 0 devices attached
00028672 00000002 00080007 00000003 qcom,qseecom 00000013 qcom,qseecom
Attached Devices:
firmware:qcom_smcinvoke
Total 1 devices attached
00004096 00000002 00080007 00000003 qcom,qseecom 00000012 qcom,qseecom
Attached Devices:
firmware:qcom_smcinvoke
Total 1 devices attached
00028672 00000002 00080007 00000003 qcom,qseecom 00000011 qcom,qseecom
Attached Devices:
firmware:qcom_smcinvoke
Total 1 devices attached
00020480 00000002 00080007 00000003 qcom,qseecom 00000010 qcom,qseecom
Attached Devices:
firmware:qcom_smcinvoke
Total 1 devices attached
00516096 00000002 00080007 00000003 qcom,qseecom 00000009 qcom,qseecom
Attached Devices:
firmware:qcom_smcinvoke
Total 1 devices attached
00020480 00000002 00080007 00000003 qcom,qseecom 00000008 qcom,qseecom
Attached Devices:
firmware:qcom_smcinvoke
Total 1 devices attached
00020480 00000002 00080007 00000003 qcom,qseecom 00000007 qcom,qseecom
Attached Devices:
firmware:qcom_smcinvoke
Total 1 devices attached
00020480 00000002 00080007 00000003 qcom,qseecom 00000006 qcom,qseecom
Attached Devices:
firmware:qcom_smcinvoke
Total 1 devices attached
00020480 00000002 00080007 00000003 qcom,qseecom 00000005 qcom,qseecom
Attached Devices:
firmware:qcom_smcinvoke
Total 1 devices attached
00028672 00000002 00080007 00000003 qcom,qseecom 00000004 qcom,qseecom
Attached Devices:
firmware:qcom_smcinvoke
Total 1 devices attached
00004096 00000000 00080005 00000001 qcom,system 00000003 <none>
Attached Devices:
aa00000.qcom,vidc:non_secure_cb
Total 1 devices attached
00004096 00000000 00080005 00000001 qcom,system 00000002 <none>
Attached Devices:
aa00000.qcom,vidc:non_secure_cb
Total 1 devices attached
03133440 00000000 00080005 00000001 qcom,system 00000001 <none>
Attached Devices:
aa00000.qcom,vidc:non_secure_cb
Total 1 devices attached
Total 154 objects, 305819648 bytes
可以看到有更多的dmabuf信息输出：size 、?flags、Attached Devices、mode? 、count? 、exp_name? 、ino? 、name
Dump整个手机系统的dmabuf
wj@wj:~/Downloads$ adb shell
aurora:/ # dmabuf_dump
binder:3072_2:3072
Name Rss Pss nr_procs Inode
qcom,qseecom 12 kB 12 kB 1 160
PROCESS TOTAL 12 kB 12 kB
----------------------
mfp-daemon:3041
Name Rss Pss nr_procs Inode
qcom,qseecom 4 kB 4 kB 1 163
qcom,qseecom 2048 kB 2048 kB 1 164
PROCESS TOTAL 2052 kB 2052 kB
----------------------
cdsprpcd:2824
Name Rss Pss nr_procs Inode
system 4 kB 4 kB 1 139
system 256 kB 256 kB 1 141
system 104 kB 104 kB 1 1994
PROCESS TOTAL 364 kB 364 kB
----------------------
binder:1817_2:1817
Name Rss Pss nr_procs Inode
qcom,qseecom 8 kB 8 kB 1 37
PROCESS TOTAL 8 kB 8 kB
----------------------
.android.camera:8920
Name Rss Pss nr_procs Inode
system 4 kB 4 kB 1 1979
system 4 kB 4 kB 1 1987
system 4 kB 4 kB 1 1988
system 6848 kB 6848 kB 1 1990
system 736 kB 736 kB 1 1993
system 148 kB 148 kB 1 1996
system 32768 kB 32768 kB 1 1997
system 4 kB 4 kB 1 2000
system 4 kB 4 kB 1 2001
system 4 kB 4 kB 1 2002
qcom,system 2392 kB 2392 kB 1 2415
qcom,system 72 kB 72 kB 1 2416
qcom,system 2448 kB 2448 kB 1 2636
qcom,system 72 kB 72 kB 1 2637
PROCESS TOTAL 45508 kB 45508 kB
----------------------
iui.miwallpaper:4872
Name Rss Pss nr_procs Inode
qcom,system 10276 kB 5138 kB 2 3711
qcom,system 32 kB 16 kB 2 3712
qcom,system 10276 kB 5138 kB 2 3723
qcom,system 32 kB 16 kB 2 3724
PROCESS TOTAL 20616 kB 10308 kB
----------------------
fidoca:1813
Name Rss Pss nr_procs Inode
qcom,qseecom 24 kB 24 kB 1 25
PROCESS TOTAL 24 kB 24 kB
----------------------
binder:1808_2:1808
Name Rss Pss nr_procs Inode
system 4 kB 4 kB 1 43
system 4 kB 4 kB 1 44
PROCESS TOTAL 8 kB 8 kB
----------------------
binder:3079_2:3079
Name Rss Pss nr_procs Inode
qcom,system 14400 kB 14400 kB 1 165
qcom,system 32 kB 32 kB 1 166
PROCESS TOTAL 14432 kB 14432 kB
----------------------
android.hardwar:1607
Name Rss Pss nr_procs Inode
qcom,qseecom 4 kB 4 kB 1 22
PROCESS TOTAL 4 kB 4 kB
----------------------
surfaceflinger:1929
Name Rss Pss nr_procs Inode
qcom,system 64 kB 64 kB 1 71
qcom,system 32 kB 32 kB 1 72
qcom,system 10276 kB 5138 kB 2 133
qcom,system 32 kB 16 kB 2 134
qcom,system 384 kB 192 kB 2 225
qcom,system 32 kB 16 kB 2 226
qcom,system 384 kB 192 kB 2 227
qcom,system 32 kB 16 kB 2 228
qcom,system 384 kB 192 kB 2 229
qcom,system 32 kB 16 kB 2 230
qcom,system 384 kB 192 kB 2 231
qcom,system 32 kB 16 kB 2 232
qcom,system 344 kB 172 kB 2 247
qcom,system 32 kB 16 kB 2 248
qcom,system 952 kB 476 kB 2 292
qcom,system 32 kB 16 kB 2 293
qcom,system 952 kB 476 kB 2 298
qcom,system 32 kB 16 kB 2 299
qcom,system 952 kB 476 kB 2 302
qcom,system 32 kB 16 kB 2 303
qcom,system 952 kB 476 kB 2 304
qcom,system 32 kB 16 kB 2 305
qcom,system 952 kB 476 kB 2 308
qcom,system 32 kB 16 kB 2 309
qcom,system 952 kB 476 kB 2 310
qcom,system 32 kB 16 kB 2 311
qcom,system 952 kB 476 kB 2 312
qcom,system 32 kB 16 kB 2 313
qcom,system 952 kB 476 kB 2 314
qcom,system 32 kB 16 kB 2 315
qcom,system 344 kB 172 kB 2 323
qcom,system 32 kB 16 kB 2 324
qcom,system 208 kB 104 kB 2 325
qcom,system 32 kB 16 kB 2 326
qcom,system 208 kB 104 kB 2 327
qcom,system 32 kB 16 kB 2 328
qcom,system 208 kB 104 kB 2 329
qcom,system 32 kB 16 kB 2 330
qcom,system 208 kB 104 kB 2 331
qcom,system 32 kB 16 kB 2 332
qcom,system 128 kB 128 kB 1 333
qcom,system 32 kB 32 kB 1 334
qcom,system 480 kB 240 kB 2 349
qcom,system 32 kB 16 kB 2 350
qcom,system 480 kB 240 kB 2 351
qcom,system 32 kB 16 kB 2 352
qcom,system 480 kB 240 kB 2 353
qcom,system 32 kB 16 kB 2 354
qcom,system 480 kB 240 kB 2 355
qcom,system 32 kB 16 kB 2 356
qcom,system 10276 kB 5138 kB 2 645
qcom,system 32 kB 16 kB 2 646
qcom,system 10276 kB 5138 kB 2 647
qcom,system 32 kB 16 kB 2 648
qcom,system 10276 kB 10276 kB 1 829
qcom,system 32 kB 32 kB 1 830
qcom,system 10276 kB 10276 kB 1 2694
qcom,system 32 kB 32 kB 1 2695
qcom,system 10276 kB 5138 kB 2 3711
qcom,system 32 kB 16 kB 2 3712
qcom,system 10276 kB 5138 kB 2 3723
qcom,system 32 kB 16 kB 2 3724
qcom,system 10276 kB 5138 kB 2 3731
qcom,system 32 kB 16 kB 2 3732
PROCESS TOTAL 96016 kB 58444 kB
----------------------
mrmd:1809
Name Rss Pss nr_procs Inode
qcom,qseecom 8 kB 8 kB 1 27
PROCESS TOTAL 8 kB 8 kB
----------------------
binder:1671_2:1671
Name Rss Pss nr_procs Inode
qcom,system 10276 kB 5138 kB 2 133
qcom,system 32 kB 16 kB 2 134
qcom,system 20 kB 20 kB 1 169
qcom,system 20 kB 20 kB 1 170
qcom,system 20 kB 20 kB 1 171
qcom,system 10276 kB 5138 kB 2 645
qcom,system 32 kB 16 kB 2 646
qcom,system 10276 kB 5138 kB 2 647
qcom,system 32 kB 16 kB 2 648
PROCESS TOTAL 30984 kB 15522 kB
----------------------
vendor.qti.came:1650
Name Rss Pss nr_procs Inode
system 4 kB 4 kB 1 142
system 4 kB 4 kB 1 143
system 4 kB 4 kB 1 1180
system 4 kB 4 kB 1 1194
system 4 kB 4 kB 1 1195
system 736 kB 736 kB 1 1201
system 148 kB 148 kB 1 1203
system 6848 kB 6848 kB 1 1601
system 1024 kB 1024 kB 1 1620
system 32768 kB 32768 kB 1 1621
system 4 kB 4 kB 1 1625
system 4 kB 4 kB 1 1627
system 4 kB 4 kB 1 1628
PROCESS TOTAL 41556 kB 41556 kB
----------------------
adsprpcd:2822
Name Rss Pss nr_procs Inode
system 4 kB 4 kB 1 136
system 4 kB 4 kB 1 137
system 256 kB 256 kB 1 138
PROCESS TOTAL 264 kB 264 kB
----------------------
system_server:2293
Name Rss Pss nr_procs Inode
qcom,system 10200 kB 5100 kB 2 3693
qcom,system 32 kB 16 kB 2 3694
PROCESS TOTAL 10232 kB 5116 kB
----------------------
ndroid.systemui:5329
Name Rss Pss nr_procs Inode
qcom,system 952 kB 476 kB 2 292
qcom,system 32 kB 16 kB 2 293
qcom,system 952 kB 476 kB 2 298
qcom,system 32 kB 16 kB 2 299
qcom,system 952 kB 476 kB 2 302
qcom,system 32 kB 16 kB 2 303
qcom,system 952 kB 476 kB 2 304
qcom,system 32 kB 16 kB 2 305
qcom,system 952 kB 476 kB 2 308
qcom,system 32 kB 16 kB 2 309
qcom,system 952 kB 476 kB 2 310
qcom,system 32 kB 16 kB 2 311
qcom,system 952 kB 476 kB 2 312
qcom,system 32 kB 16 kB 2 313
qcom,system 952 kB 476 kB 2 314
qcom,system 32 kB 16 kB 2 315
qcom,system 208 kB 104 kB 2 325
qcom,system 32 kB 16 kB 2 326
qcom,system 208 kB 104 kB 2 327
qcom,system 32 kB 16 kB 2 328
qcom,system 208 kB 104 kB 2 329
qcom,system 32 kB 16 kB 2 330
qcom,system 208 kB 104 kB 2 331
qcom,system 32 kB 16 kB 2 332
qcom,system 480 kB 240 kB 2 349
qcom,system 32 kB 16 kB 2 350
qcom,system 480 kB 240 kB 2 351
qcom,system 32 kB 16 kB 2 352
qcom,system 480 kB 240 kB 2 353
qcom,system 32 kB 16 kB 2 354
qcom,system 480 kB 240 kB 2 355
qcom,system 32 kB 16 kB 2 356
qcom,system 752 kB 752 kB 1 463
qcom,system 32 kB 32 kB 1 464
qcom,system 752 kB 752 kB 1 465
qcom,system 32 kB 32 kB 1 466
qcom,system 752 kB 752 kB 1 467
qcom,system 32 kB 32 kB 1 468
qcom,system 10276 kB 10276 kB 1 3725
qcom,system 32 kB 32 kB 1 3726
qcom,system 10276 kB 10276 kB 1 3727
qcom,system 32 kB 32 kB 1 3728
qcom,system 10276 kB 10276 kB 1 3729
qcom,system 32 kB 32 kB 1 3730
qcom,system 10276 kB 5138 kB 2 3731
qcom,system 32 kB 16 kB 2 3732
qcom,system 752 kB 752 kB 1 3733
qcom,system 32 kB 32 kB 1 3734
qcom,system 752 kB 752 kB 1 3735
qcom,system 32 kB 32 kB 1 3736
qcom,system 752 kB 752 kB 1 3737
qcom,system 32 kB 32 kB 1 3738
PROCESS TOTAL 56816 kB 46222 kB
----------------------
sscrpcd:1281
Name Rss Pss nr_procs Inode
system 4 kB 4 kB 1 76
system 4 kB 4 kB 1 77
PROCESS TOTAL 8 kB 8 kB
----------------------
binder:1589_2:1589
Name Rss Pss nr_procs Inode
<unknown> 32 kB 32 kB 1 135
PROCESS TOTAL 32 kB 32 kB
----------------------
com.miui.home:5380
Name Rss Pss nr_procs Inode
qcom,system 384 kB 192 kB 2 225
qcom,system 32 kB 16 kB 2 226
qcom,system 384 kB 192 kB 2 227
qcom,system 32 kB 16 kB 2 228
qcom,system 384 kB 192 kB 2 229
qcom,system 32 kB 16 kB 2 230
qcom,system 384 kB 192 kB 2 231
qcom,system 32 kB 16 kB 2 232
qcom,system 344 kB 172 kB 2 247
qcom,system 32 kB 16 kB 2 248
qcom,system 344 kB 172 kB 2 323
qcom,system 32 kB 16 kB 2 324
qcom,system 10200 kB 10200 kB 1 3665
qcom,system 32 kB 32 kB 1 3666
qcom,system 10200 kB 5100 kB 2 3693
qcom,system 32 kB 16 kB 2 3694
PROCESS TOTAL 22880 kB 16556 kB
----------------------
qseecomd:1079
Name Rss Pss nr_procs Inode
qcom,qseecom 28 kB 28 kB 1 1
qcom,qseecom 20 kB 20 kB 1 2
qcom,qseecom 20 kB 20 kB 1 3
qcom,qseecom 20 kB 20 kB 1 4
qcom,qseecom 20 kB 20 kB 1 5
qcom,qseecom 504 kB 504 kB 1 6
qcom,qseecom 20 kB 20 kB 1 7
qcom,qseecom 28 kB 28 kB 1 8
qcom,qseecom 4 kB 4 kB 1 9
qcom,qseecom 28 kB 28 kB 1 10
PROCESS TOTAL 692 kB 692 kB
----------------------
tee-supplicant:1525
Name Rss Pss nr_procs Inode
qcom,qseecom 4 kB 4 kB 1 16
PROCESS TOTAL 4 kB 4 kB
----------------------
audioadsprpcd:490
Name Rss Pss nr_procs Inode
system 4 kB 4 kB 1 79
system 4 kB 4 kB 1 80
PROCESS TOTAL 8 kB 8 kB
----------------------
dmabuf total: 265484 kB kernel_rss: 8332 kB userspace_rss: 342528 kB userspace_pss: 257152 kBDump某个进程的dmabuf
下面Dump Camera Provider进程的dmabuf使用情况。
wj@wj:~/Downloads$ adb shell ps -e | grep camera
cameraserver 1650 1 14121844 661800 binder_ioctl_write_read 0 S vendor.qti.camera.provider-service_64
cameraserver 2691 1 3069520 23404 binder_ioctl_write_read 0 S cameraserver
u0_a139 8920 1478 9591760 333440 do_epoll_wait 0 S com.android.camera
wj@wj:~/Downloads$ adb shell dmabuf_dump 1650
vendor.qti.came:1650
Name Rss Pss nr_procs Inode
system 4 kB 4 kB 1 142
system 4 kB 4 kB 1 143
system 4 kB 4 kB 1 1180
system 4 kB 4 kB 1 1194
system 4 kB 4 kB 1 1195
system 736 kB 736 kB 1 1201
system 148 kB 148 kB 1 1203
system 6848 kB 6848 kB 1 1601
system 1024 kB 1024 kB 1 1620
system 32768 kB 32768 kB 1 1621
system 4 kB 4 kB 1 1625
system 4 kB 4 kB 1 1627
system 4 kB 4 kB 1 1628
PROCESS TOTAL 41556 kB 41556 kB
----------------------
dmabuf total: 265484 kB kernel_rss: 223928 kB userspace_rss: 41556 kB userspace_pss: 41556 kB
以Table[buffer x process]方式呈现dmabuf
?注意，该方式只能看整个系统的dambuf
wj@wj:~/Downloads$ adb shell
aurora:/ # dmabuf_dump -a
Dmabuf Inode | Size | Fd Ref Counts | Map Ref Counts | audioadsprpcd:499 | qseecomd:1012 | sscrpcd:1254 | tee-supplicant:1491 | binder:1548_2:1548 | android.hardwar:1568 | vendor.qti.came:1601 | binder:1611_2:1611 | binder:1734_2:1734 | mrmd:1735 | fidoca:1743 | binder:1750_2:1750 | surfaceflinger:1846 | adsprpcd:2891 | cdsprpcd:2895 | mfp-daemon:3096 | binder:3104_2:3104 | binder:3118_2:3118 | iui.miwallpaper:4832 | ndroid.systemui:5265 | com.miui.home:5302 |
78 | 4 kB | 1 | 1 | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
79 | 4 kB | 1 | 1 | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
4 | 28 kB | 1 | 0 | -- | 2( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
5 | 20 kB | 1 | 0 | -- | 2( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
6 | 20 kB | 1 | 0 | -- | 2( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
7 | 20 kB | 1 | 0 | -- | 2( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
8 | 20 kB | 1 | 0 | -- | 2( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
9 | 504 kB | 1 | 0 | -- | 2( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
10 | 20 kB | 1 | 0 | -- | 2( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
11 | 28 kB | 1 | 0 | -- | 2( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
12 | 4 kB | 1 | 0 | -- | 2( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
13 | 28 kB | 1 | 0 | -- | 2( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
71 | 4 kB | 1 | 1 | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
72 | 4 kB | 1 | 1 | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
16 | 4 kB | 1 | 1 | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
154 | 32 kB | 1 | 1 | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
57 | 4 kB | 1 | 1 | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
134 | 4 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
135 | 4 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
170 | 20 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
171 | 20 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
172 | 20 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
152 | 10276 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | 2( 0) refs | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- |
153 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- |
47 | 4 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
48 | 4 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
46 | 8 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
36 | 24 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
45 | 8 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- |
62 | 18500 kB | 1 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- |
63 | 32 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- |
64 | 18500 kB | 1 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- |
65 | 32 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- |
73 | 64 kB | 1 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- |
74 | 32 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- |
320 | 128 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- |
215 | 384 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs |
213 | 384 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs |
214 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs |
216 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs |
217 | 384 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs |
218 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs |
219 | 384 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs |
220 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs |
257 | 344 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs |
258 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs |
285 | 952 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
286 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
302 | 952 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
303 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
321 | 32 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- |
310 | 344 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs |
311 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs |
292 | 952 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
293 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
308 | 952 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
309 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
318 | 208 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
319 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
328 | 10276 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
329 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
342 | 480 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
343 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
326 | 10276 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
327 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
348 | 10276 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- |
349 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- |
316 | 208 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
317 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
340 | 480 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
341 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
324 | 10276 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
325 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
314 | 208 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
315 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
322 | 10276 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
323 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
338 | 480 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
339 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
312 | 208 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
313 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
332 | 752 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
333 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
330 | 752 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
331 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
336 | 480 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
334 | 752 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
335 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
337 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
288 | 952 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
289 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
290 | 952 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
291 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
306 | 952 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
307 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
433 | 10276 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- |
434 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- |
304 | 952 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
305 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
155 | 4 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- |
156 | 4 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- |
157 | 256 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- |
158 | 4 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- |
159 | 4 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- |
160 | 256 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- |
164 | 4 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- |
165 | 2048 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- |
162 | 12 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- |
166 | 14400 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- |
167 | 32 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- |
------------------------------------
TOTALS 143012 kB | n/a | n/a | 8 kB | 692 kB | 8 kB | 4 kB | 32 kB | 4 kB | 8 kB | 10368 kB | 8 kB | 8 kB | 24 kB | 8 kB | 125124 kB | 264 kB | 264 kB | 2052 kB | 12 kB | 14432 kB | 20616 kB | 54464 kB | 2416 kB |
上述dump说明：
- Fd Ref Counts ：表示该FD有多少个进程在引用
- Map Ref Counts：表示该FD当前有多少个进程已经做过Map
- FD( Map) refs :?该进程持有该Buffer的参考计数的总数量以及Map的总次数
Dump整个系统DMA-BUF per-buffer, per-exporter and per-device statistics
在kernel版本>= 5.10上生效。
执行：dmabuf_dump -b
会从sysfs(/sys/kernel/dmabuf/buffers)中dump dmabuf统计信息，显示如下内容：
wj@wj:~/Downloads$ adb shell
aurora:/ # dmabuf_dump -b
----------------------- DMA-BUF per-buffer stats -----------------------
Dmabuf Inode | Size(bytes) | Exporter Name |
2262 |10522624 | qcom,system
2017 |753664 | system
1372 |4096 | system
315 |32768 | qcom,system
17 |3141632 | qcom,system
343 |32768 | qcom,system
220 |32768 | qcom,system
164 |4096 | qcom,qseecom
45 |8192 | qcom,qseecom
305 |32768 | qcom,system
73 |65536 | qcom,system
154 |32768 | system
663 |32768 | qcom,system
7 |20480 | qcom,qseecom
2270 |770048 | qcom,system
2025 |151552 | system
1342 |7012352 | system
2260 |10522624 | qcom,system
172 |20480 | qcom,system
313 |32768 | qcom,system
257 |352256 | qcom,system
134 |4096 | system
341 |32768 | qcom,system
285 |974848 | qcom,system
219 |393216 | qcom,system
162 |12288 | qcom,qseecom
2005 |4096 | system
43 |1200128 | qcom,system
303 |32768 | qcom,system
2033 |4096 | system
1501 |10522624 | qcom,system
71 |4096 | system
152 |10522624 | qcom,system
5 |20480 | qcom,qseecom
2269 |32768 | qcom,system
321 |32768 | qcom,system
1010 |4096 | system
293 |32768 | qcom,system
170 |20480 | qcom,system
311 |32768 | qcom,system
13 |28672 | qcom,qseecom
217 |393216 | qcom,system
2249 |32768 | qcom,system
160 |262144 | system
1359 |1048576 | system
1952 |10444800 | qcom,system
1019 |151552 | system
3 |4096 | qcom,system
2267 |32768 | qcom,system
291 |32768 | qcom,system
1367 |4096 | system
78 |4096 | system
11 |28672 | qcom,qseecom
338 |491520 | qcom,system
215 |393216 | qcom,system
2247 |32768 | qcom,system
724 |4096 | system
668 |10522624 | qcom,system
2275 |32768 | qcom,system
1017 |753664 | system
1 |3133440 | qcom,system
2265 |32768 | qcom,system
318 |212992 | qcom,system
167 |32768 | qcom,system
48 |4096 | system
308 |974848 | qcom,system
336 |491520 | qcom,system
213 |393216 | qcom,system
157 |262144 | system
996 |4096 | system
2273 |32768 | qcom,system
2263 |32768 | qcom,system
2018 |106496 | system
316 |212992 | qcom,system
18 |1048576 | qcom,system
288 |974848 | qcom,system
165 |2097152 | qcom,qseecom
2008 |7012352 | system
46 |8192 | qcom,qseecom
1363 |33554432 | system
306 |974848 | qcom,system
74 |32768 | qcom,system
155 |4096 | system
2187 |10444800 | qcom,system
664 |10522624 | qcom,system
36 |24576 | qcom,qseecom
8 |20480 | qcom,qseecom
2271 |32768 | qcom,system
2261 |32768 | qcom,system
1371 |4096 | system
314 |212992 | qcom,system
258 |32768 | qcom,system
135 |4096 | system
16 |4096 | qcom,qseecom
342 |491520 | qcom,system
286 |32768 | qcom,system
729 |753664 | system
304 |974848 | qcom,system
2034 |4096 | system
1502 |32768 | qcom,system
72 |4096 | system
153 |32768 | qcom,system
662 |10522624 | qcom,system
6 |20480 | qcom,qseecom
1011 |4096 | system
171 |20480 | qcom,system
312 |212992 | qcom,system
340 |491520 | qcom,system
218 |32768 | qcom,system
727 |4423680 | system
2004 |4096 | system
302 |974848 | qcom,system
1953 |32768 | qcom,system
4 |28672 | qcom,qseecom
2268 |10522624 | qcom,system
320 |131072 | qcom,system
292 |974848 | qcom,system
310 |352256 | qcom,system
79 |4096 | system
12 |4096 | qcom,qseecom
339 |32768 | qcom,system
216 |32768 | qcom,system
2248 |10522624 | qcom,system
725 |4096 | system
669 |32768 | qcom,system
2 |4096 | qcom,system
2266 |10522624 | qcom,system
319 |32768 | qcom,system
1460 |73728 | qcom,system
290 |974848 | qcom,system
733 |33554432 | system
309 |32768 | qcom,system
2039 |4096 | system
10 |20480 | qcom,qseecom
337 |32768 | qcom,system
214 |32768 | qcom,system
2246 |10444800 | qcom,system
158 |4096 | system
723 |4096 | system
2274 |770048 | qcom,system
2029 |33554432 | system
2264 |10522624 | qcom,system
57 |4096 | qcom,qseecom
317 |32768 | qcom,system
1459 |2506752 | qcom,system
289 |32768 | qcom,system
166 |14745600 | qcom,system
731 |151552 | system
47 |4096 | system
307 |32768 | qcom,system
1958 |4096 | system
156 |4096 | system
2188 |32768 | qcom,system
665 |32768 | qcom,system
9 |516096 | qcom,qseecom
2272 |770048 | qcom,system
----------------------- DMA-BUF exporter stats -----------------------
Exporter Name | Total Count | Total Size(bytes) |
qcom,system | 95| 189779968
system | 43| 123645952
qcom,qseecom | 18| 2871296
----------------------- DMA-BUF total stats --------------------------
Total DMA-BUF count: 156, Total DMA-BUF size(bytes): 316297216DMA_BUF 在内核中的实现
源代码位置：kernel_platform/msm-kernel/drivers/dma-buf/
这篇文章不深入这块内容，后面有时间可以专门写文章进行深入分析。
dmabuf_dump原理分析
源码路径：
system/memory/libmeminfo/libdmabufinfo/
DmaBuffer
DmaBuffer结构体定义如下：
struct DmaBuffer {
public:
DmaBuffer(ino_t inode, uint64_t size, uint64_t count, const std::string& exporter,
const std::string& name)
: inode_(inode), size_(size), count_(count), exporter_(exporter), name_(name) {
total_refs_ = 0;
}
DmaBuffer() = default;
~DmaBuffer() = default;
// Adds one file descriptor reference for the given pid
void AddFdRef(pid_t pid) {
AddRefToPidMap(pid, &fdrefs_);
total_refs_++;
}
// Adds one map reference for the given pid
void AddMapRef(pid_t pid) {
AddRefToPidMap(pid, &maprefs_);
total_refs_++;
}
// Getters for each property
uint64_t size() const { return size_; }
const std::unordered_map<pid_t, int>& fdrefs() const { return fdrefs_; }
const std::unordered_map<pid_t, int>& maprefs() const { return maprefs_; }
ino_t inode() const { return inode_; }
uint64_t total_refs() const { return total_refs_; }
uint64_t count() const { return count_; };
const std::set<pid_t>& pids() const { return pids_; }
const std::string& name() const { return name_; }
const std::string& exporter() const { return exporter_; }
void SetName(const std::string& name) { name_ = name; }
void SetExporter(const std::string& exporter) { exporter_ = exporter; }
void SetCount(uint64_t count) { count_ = count; }
uint64_t Pss() const { return size_ / pids_.size(); }
bool operator==(const DmaBuffer& rhs) {
return (inode_ == rhs.inode()) && (size_ == rhs.size()) && (name_ == rhs.name()) &&
(exporter_ == rhs.exporter());
}
private:
ino_t inode_;
uint64_t size_;
uint64_t count_;
uint64_t total_refs_;
std::set<pid_t> pids_;
std::string exporter_;
std::string name_;
std::unordered_map<pid_t, int> fdrefs_;
std::unordered_map<pid_t, int> maprefs_;
void AddRefToPidMap(pid_t pid, std::unordered_map<pid_t, int>* map) {
// The first time we find a ref, we set the ref count to 1
// otherwise, increment the existing ref count
auto [it, inserted] = map->insert(std::make_pair(pid, 1));
if (!inserted) it->second++;
pids_.insert(pid);
}
};
主要成员变量
-
name_?: 该dmabuf的name，如果读不到name，默认为 ‘<unknown>’
-
pids_: 有dup或map该dmabuf的pid 集合。
-
count_: fdinfo里面的count，目前看dambuf_dump并没有用。
-
size_: 该dmabuf占用的内存大小，单位是byte。
-
inode_: 该dmabuf的inode。
-
exporter_: 申请该dmabuf的name，如果读不到name，默认为'<unknown>’。
-
total_refs_: fdrefs?个数 + maprefs?个数，目前看dambuf_dump并没有用。
-
fdrefs_: 有open或dup该dmabuf的pid集合。注：一个pid对同一个dmabuf(inode)可能有多个reference。
-
maprefs_: 有map该dmabuf的pid集合。注：一个pid对同一个dmabuf(inode)可能有多个reference。
FD和Inode的关系
为了实现buffer的共享，在内核中将DMA-BUF将buffer与file关联起来，一个Buffer对应唯一一个File,一个File对应唯一一个 inode,将这个file的fd返回给应用层,通过binder实现进程之间的fd传递(dup)，进而拿到唯一的File 和 Buffer。
?
dump整个系统流程原理
直接执行dmabuf_dump会dump 整个系统的dmabuf 信息，代码执行流程如下：
ReadDmaBufFdRefs
// Public methods
bool ReadDmaBufFdRefs(int pid, std::vector<DmaBuffer>* dmabufs,
const std::string& procfs_path) {
constexpr char permission_err_msg[] =
"Failed to read fdinfo - requires either PTRACE_MODE_READ or root depending on "
"the device kernel";
static bool logged_permission_err = false;
std::string fdinfo_dir_path =
::android::base::StringPrintf("%s/%d/fdinfo", procfs_path.c_str(), pid);
std::unique_ptr<DIR, decltype(&closedir)> dir(opendir(fdinfo_dir_path.c_str()), &closedir);
if (!dir) {
// Don't log permission errors to reduce log spam on devices where fdinfo
// of other processes can only be read by root.
if (errno != EACCES) {
PLOG(ERROR) << "Failed to open " << fdinfo_dir_path << " directory";
} else if (!logged_permission_err) {
LOG(ERROR) << permission_err_msg;
logged_permission_err = true;
}
return false;
}
struct dirent* dent;
while ((dent = readdir(dir.get()))) {
int fd;
if (!::android::base::ParseInt(dent->d_name, &fd)) {
continue;
}
// Set defaults in case the kernel doesn't give us the information
// we need in fdinfo
std::string name = "<unknown>";
std::string exporter = "<unknown>";
uint64_t count = 0;
uint64_t size = 0;
uint64_t inode = -1;
bool is_dmabuf_file = false;
auto fdinfo_result = ReadDmaBufFdInfo(pid, fd, &name, &exporter, &count, &size, &inode,
&is_dmabuf_file, procfs_path);
if (fdinfo_result != OK) {
if (fdinfo_result == NOT_FOUND) {
continue;
}
// Don't log permission errors to reduce log spam when the process doesn't
// have the PTRACE_MODE_READ permission.
if (errno != EACCES) {
LOG(ERROR) << "Failed to read fd info for pid: " << pid << ", fd: " << fd;
} else if (!logged_permission_err) {
LOG(ERROR) << permission_err_msg;
logged_permission_err = true;
}
return false;
}
if (!is_dmabuf_file) {
continue;
}
if (inode == static_cast<uint64_t>(-1)) {
// Fallback to stat() on the fd path to get inode number
std::string fd_path =
::android::base::StringPrintf("%s/%d/fd/%d", procfs_path.c_str(), pid, fd);
struct stat sb;
if (stat(fd_path.c_str(), &sb) < 0) {
if (errno == ENOENT) {
continue;
}
PLOG(ERROR) << "Failed to stat: " << fd_path;
return false;
}
inode = sb.st_ino;
// If root, calculate size from the allocated blocks.
size = sb.st_blocks * 512;
}
auto buf = std::find_if(dmabufs->begin(), dmabufs->end(),
[&inode](const DmaBuffer& dbuf) { return dbuf.inode() == inode; });
if (buf != dmabufs->end()) {
if (buf->name() == "" || buf->name() == "<unknown>") buf->SetName(name);
if (buf->exporter() == "" || buf->exporter() == "<unknown>") buf->SetExporter(exporter);
if (buf->count() == 0) buf->SetCount(count);
buf->AddFdRef(pid);
continue;
}
DmaBuffer& db = dmabufs->emplace_back(inode, size, count, exporter, name);
db.AddFdRef(pid);
}
return true;
}读取?/proc/<pid>/fdinfo/?下面的所有fd，针对每个fd读取如下信息
- count
- exp_name，有exp_name则表示是 dmabuf 的file。
- name
- size
- ino：inode
如果是dmabuf file，但没有读到inode，则：
读取?/proc/<pid>/fdinfo/fd的stat，从里面去读取size和inode
if (inode == static_cast<uint64_t>(-1)) {
// Fallback to stat() on the fd path to get inode number
std::string fd_path =
::android::base::StringPrintf("%s/%d/fd/%d", procfs_path.c_str(), pid, fd);
struct stat sb;
if (stat(fd_path.c_str(), &sb) < 0) {
if (errno == ENOENT) {
continue;
}
PLOG(ERROR) << "Failed to stat: " << fd_path;
return false;
}
inode = sb.st_ino;
// If root, calculate size from the allocated blocks.
size = sb.st_blocks * 512;
}最后，调用DmaBuffer的AddFdRef，添加到fdrefs_?map里面去。
AddFdRef
// Adds one file descriptor reference for the given pid
void AddFdRef(pid_t pid) {
AddRefToPidMap(pid, &fdrefs_);
total_refs_++;
}ReadDmaBufMapRefs
bool ReadDmaBufMapRefs(pid_t pid, std::vector<DmaBuffer>* dmabufs,
const std::string& procfs_path,
const std::string& dmabuf_sysfs_path) {
std::string mapspath = ::android::base::StringPrintf("%s/%d/maps", procfs_path.c_str(), pid);
std::ifstream fp(mapspath);
if (!fp) {
LOG(ERROR) << "Failed to open " << mapspath << " for pid: " << pid;
return false;
}
// Process the map if it is dmabuf. Add map reference to existing object in 'dmabufs'
// if it was already found. If it wasn't create a new one and append it to 'dmabufs'
auto account_dmabuf = [&](const android::procinfo::MapInfo& mapinfo) {
// no need to look into this mapping if it is not dmabuf
if (!FileIsDmaBuf(mapinfo.name)) {
return;
}
auto buf = std::find_if(
dmabufs->begin(), dmabufs->end(),
[&mapinfo](const DmaBuffer& dbuf) { return dbuf.inode() == mapinfo.inode; });
if (buf != dmabufs->end()) {
buf->AddMapRef(pid);
return;
}
// We have a new buffer, but unknown count and name and exporter name
// Try to lookup exporter name in sysfs
std::string exporter;
bool sysfs_stats = ReadBufferExporter(mapinfo.inode, &exporter, dmabuf_sysfs_path);
if (!sysfs_stats) {
exporter = "<unknown>";
}
// Using the VMA range as the size of the buffer can be misleading,
// due to partially mapped buffers or VMAs that extend beyond the
// buffer size.
//
// Attempt to retrieve the real buffer size from sysfs.
uint64_t size = 0;
if (!sysfs_stats || !ReadBufferSize(mapinfo.inode, &size, dmabuf_sysfs_path)) {
size = mapinfo.end - mapinfo.start;
}
DmaBuffer& dbuf = dmabufs->emplace_back(mapinfo.inode, size, 0, exporter, "<unknown>");
dbuf.AddMapRef(pid);
};
for (std::string line; getline(fp, line);) {
if (!::android::procinfo::ReadMapFileContent(line.data(), account_dmabuf)) {
LOG(ERROR) << "Failed to parse " << mapspath << " for pid: " << pid;
return false;
}
}
return true;
}读取/proc/<pid>/maps下面的信息，只处理name以?/dmabuf?开头的map(也就是dmabuf的map)。
注：如果从maps里面读到的inode不在fdrefs_ 里面，则会尝试到?/sys/kernel/dmabuf/buffers?里面去读该dmabuf的size，name，exp_name。?
然后调用DmaBuffer的AddMapRef，添加到maprefs_?map里面去。
AddMapRef
// Adds one map reference for the given pid
void AddMapRef(pid_t pid) {
AddRefToPidMap(pid, &maprefs_);
total_refs_++;
}dmabuf_dump <pid>
流程跟dump 整個系统的dmabuf info类似，只是这里只dump指定pid的dmabuf info。
dmabuf_dump -a
以Table[buffer x process]方式呈现dmabuf info。
跟dmabuf_dump相比，只是打印DmaBuffer的方式不一样。
dmabuf_dump -b
Dmabuf Sysfs Stats统计，有三个相关类：
| 类 | 定义 | 作用 |
|---|---|---|
| DmabufSysfsStats |
| Dmabuf sysfs 统计信息每一块Dmabuf信息exporter信息总Dmabuf信息 |
| DmabufInfo |
| 统计一块Dmabuf 信息，包括inode、exporter name、size |
| DmabufTotal |
| 统计整个系统的Dmabuf信息，包括buffer总数、buffer总大小 |
代码流程
dmabuf的运用
文章来源:https://blog.csdn.net/weixin_42136255/article/details/135531264
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本文来自互联网用户投稿，该文观点仅代表作者本人，不代表本站立场。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。 如若内容造成侵权/违法违规/事实不符，请联系我的编程经验分享网邮箱：chenni525@qq.com进行投诉反馈，一经查实，立即删除！
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