1.理論準備

perfetto普通模式的命令行

普通模式

在普通模式下使用 perfetto 的一般語法如下：

     adb shell perfetto [ --txt ] --config CONFIG_FILE

下表列出了在普通模式下使用 perfetto 的可用選項：

選項	說明
`--config CONFIG_FILE \| -c CONFIG_FILE`	指定配置文件的路徑。在普通模式下，某些配置可能會在配置協議緩衝區中進行編碼。此文件必須符合 AOSP `trace_config.proto` 中定義的協議緩衝區架構。根據 AOSP `data_source_config.proto` 中的定義，您可以使用 `TraceConfig` 的 `DataSourceConfig` 成員來選擇和配置數據源。
`--txt`	指示 `perfetto` 將配置文件解析爲 pbtxt。此標記爲實驗性標記，不建議您在正式版中啓用此標記。

這兩個標記是用來解析config文件的

至於加不加--txt參考

https://perfetto.dev/docs/concepts/config

PBTX vs binary format

There are two ways to pass the trace config when using the perfetto cmdline client format:

Text format

It is the preferred format for human-driven workflows and exploration. It allows to pass directly the text file in the PBTX (ProtoBuf TeXtual representation) syntax, for the schema defined in the trace_config.proto (see reference docs)

When using this mode pass the --txt flag to perfetto to indicate the config should be interpreted as a PBTX file:
perfetto -c /path/to/config.pbtx --txt -o trace_file.pftrace
NOTE: The --txt option has been introduced only in Android 10 (Q). Older versions support only the binary format.

WARNING: Do not use the text format for machine-to-machine interaction benchmark, scripts and tools) as it's more prone to breakages (e.g. if a field is renamed or an enum is turned into an integer)

Binary format

It is the preferred format for machine-to-machine (M2M) interaction. It involves passing the protobuf-encoded binary of the TraceConfig message. This can be obtained passing the PBTX in input to the protobuf's protoc compiler (which can be downloaded here).
cd ~/code/perfetto  # external/perfetto in the Android tree.

protoc --encode=perfetto.protos.TraceConfig \
        -I. protos/perfetto/config/perfetto_config.proto \
        < config.txpb \
        > config.bin
and then passing it to perfetto as follows, without the --txt argument:

perfetto -c config.bin -o trace_file.pftrace

步驟參考

https://perfetto.dev/docs/quickstart/android-tracing

adb push config.txt /data/local/tmp/trace_config.txt abb shell 'perfetto --txt -c - -o /data/misc/perfetto-traces/trace < /data/local/tmp/trace_config.txt'

NOTE: because of strict SELinux rules, on versions of older than Android 11 (R) passing directly the file path as -c /data/local/tmp/config might fail, hence the -c - + stdin piping above.

Pull the file using adb pull /data/misc/perfetto-traces/trace ~/trace.pftrace and upload to the Perfetto UI.

The full reference for the perfetto cmdline interface can be found here.

至於config文件可以在UI界面選擇需要trace的categories後看https://ui.perfetto.dev/#!/record?p=instructions

比如我需要加一個am的categories

然後點擊instructions

可以看到instructions裏多了個am

config文件截取中間的一段就可以了

buffers: {
    size_kb: 8960
    fill_policy: DISCARD
}
buffers: {
    size_kb: 1280
    fill_policy: DISCARD
}
data_sources: {
    config {
        name: "linux.ftrace"
        ftrace_config {
            ftrace_events: "ftrace/print"
            atrace_categories: "am"
        }
    }
}
duration_ms: 10000

比如我如下執行結果

config源文件

buffers: {
    size_kb: 8960
    fill_policy: DISCARD
}
buffers: {
    size_kb: 1280
    fill_policy: DISCARD
}
data_sources: {
    config {
        name: "linux.sys_stats"
        sys_stats_config {
            stat_period_ms: 1000
            stat_counters: STAT_CPU_TIMES
            stat_counters: STAT_FORK_COUNT
        }
    }
}
data_sources: {
    config {
        name: "linux.ftrace"
        ftrace_config {
            ftrace_events: "ftrace/print"
            atrace_categories: "gfx"
            atrace_categories: "view"
            atrace_categories: "wm"
            atrace_categories: "am"
            atrace_categories: "rs"
            atrace_categories: "pm"
            atrace_categories: "ss"
        }
    }
}
duration_ms: 10000

執行命令

F:\learn\systrace\bilibili>adb push perfetto_config.pbtx /data/misc/perfetto-traces/
perfetto_config.pbtx: 1 file pushed. 0.1 MB/s (784 bytes in 0.006s)

F:\learn\systrace\bilibili>adb shell perfetto --txt --config /data/misc/perfetto-traces/perfetto_config.pbtx --out /data/misc/perfetto-traces/jiatai.perfetto-trace
perfetto_cmd.cc:604      Connected to the Perfetto traced service, starting tracing for 10000 ms
perfetto_cmd.cc:677      Wrote 2475170 bytes into /data/misc/perfetto-traces/jiatai.perfetto-trace

F:\learn\systrace\bilibili>adb pull /data/misc/perfetto-traces/jiatai.perfetto-trace ./
/data/misc/perfetto-traces/jiatai.perfetto-trace: 1 file pulled. 27.4 MB/s (2475170 bytes in 0.086s)

用官方的把adb shell和子命令分開也是可以的

F:\learn\systrace\bilibili>adb shell
raphael:/ # perfetto --txt -c - -o /data/misc/perfetto-traces/trace < /data/misc/perfetto-traces/perfetto_config.pbtx
perfetto_cmd.cc:604      Connected to the Perfetto traced service, starting tracing for 10000 ms
perfetto_cmd.cc:677      Wrote 14014 bytes into /data/misc/perfetto-traces/trace
ata/misc/perfetto-traces/111.trace < /data/misc/perfetto-traces/perfetto_config.pbtx                                  <
perfetto_cmd.cc:604      Connected to the Perfetto traced service, starting tracing for 10000 ms
perfetto_cmd.cc:677      Wrote 2755679 bytes into /data/misc/perfetto-traces/111.trace
raphael:/ # exit

F:\learn\systrace\bilibili>adb pull /data/misc/perfetto-traces/111.trace ./
/data/misc/perfetto-traces/111.trace: 1 file pulled. 26.4 MB/s (2755679 bytes in 0.099s)

用perfetto打開

2.開發者選項

https://developer.android.com/topic/performance/tracing/on-device

沒打得開，應該說的就是開發者選項的系統監控

https://developer.android.google.cn/studio/profile/systrace/on-device

        啓用開發者選項（如果尚未啓用此選項）。
        打開開發者選項設置屏幕。
        在調試部分中，選擇系統跟蹤。此時會打開“系統跟蹤”應用，其中顯示了應用菜單。

        在應用菜單中，啓用顯示“快捷設置”圖塊，如圖 2 所示。系統會將系統跟蹤圖塊圖塊添加到快捷設置面板中，如圖 1 所示：

導出trace

    cd /path-to-traces-on-my-dev-machine && \
          adb pull /data/local/traces/ .

3.腳本

If you are running on a Mac or Linux host, or are using a bash-based terminal on Windows, you can use the following:

adb shell perfetto \
  -c - --txt \
  -o /data/misc/perfetto-traces/trace \
<<EOF
duration_ms: 10000

buffers: {
    size_kb: 8960
    fill_policy: DISCARD
}
buffers: {
    size_kb: 1280
    fill_policy: DISCARD
}
data_sources: {
    config {
        name: "linux.ftrace"
        ftrace_config {
            ftrace_events: "sched/sched_switch"
            ftrace_events: "power/suspend_resume"
            ftrace_events: "sched/sched_process_exit"
            ftrace_events: "sched/sched_process_free"
            ftrace_events: "task/task_newtask"
            ftrace_events: "task/task_rename"
            ftrace_events: "ftrace/print"
            atrace_categories: "gfx"
            atrace_categories: "view"
            atrace_categories: "webview"
            atrace_categories: "camera"
            atrace_categories: "dalvik"
            atrace_categories: "power"
        }
    }
}
data_sources: {
    config {
        name: "linux.process_stats"
        target_buffer: 1
        process_stats_config {
            scan_all_processes_on_start: true
        }
    }
}

EOF

window下執行有點問題，後面ubuntu下試試，我自己改文件爲bat文件了。。。

F:\learn\systrace\bilibili>bash.bat

F:\learn\systrace\bilibili>adb shell perfetto \
perfetto_cmd.cc:441      The TraceConfig is empty

F:\learn\systrace\bilibili>-c - --txt \
'-c' 不是內部或外部命令，也不是可運行的程序
或批處理文件。

F:\learn\systrace\bilibili>-o /data/misc/perfetto-traces/trace \
'-o' 不是內部或外部命令，也不是可運行的程序
或批處理文件。
此時不應有 <<。

F:\learn\systrace\bilibili><<EOF

ubuntu試了下可以的，直接把上面的命令保存成.sh執行就可以了