如何输出Perfetto

天天Lotay

发布于 2024-08-17 08:46:02

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发布于 2024-08-17 08:46:02

文章被收录于专栏：嵌入式音视频

1、可以在串口输入命令

atrace -z -b 20000 gfx input view wm am hal res sync freq idle sched rs -t 5 -o /data/youtube.txt

atrace 是 Android 系统中的一个性能分析工具，用于跟踪和记录系统调用和内核事件。这个命令包含了多个参数，每个参数都有特定的含义。

下面是命令中每个参数的解释： -z：这个参数让 atrace 以“压缩”模式运行，即它会尝试减少输出文件的大小，这有助于减少存储空间的占用。 -b 20000：-b 参数后面跟的数字表示输出缓冲区的大小，单位是字节。在这个例子中，缓冲区大小被设置为 20000 字节。 gfx input view wm am hal res sync freq idle sched rs：这些是 atrace 要跟踪的标签（categories）。每个标签代表一个跟踪类别，例如：


gfx	图形相关事件
input：输入设备相关事件
view	视图系统相关事件
wm	窗口管理器相关事件
am	活动管理器相关事件
hal	硬件抽象层相关事件
res	资源管理器相关事件
sync	同步机制相关事件
freq	CPU频率变化事件
idle	CPU空闲状态事件
sched	调度器事件
rs	RenderScript 脚本执行事件

-t 5：-t 参数后面跟的数字表示跟踪持续的时间，单位是秒。这里设置为跟踪 5 秒。 -o /data/youtube.txt：-o 参数后面跟的是输出文件的路径。在这个例子中，跟踪结果将被保存到 /data/youtube.txt 文件中。

总结来说，这个 atrace 命令配置了一个压缩模式的跟踪会话，设置了 20000 字节的缓冲区大小，选择了多个跟踪类别，持续跟踪 5 秒，并将结果输出到 /data/youtube.txt 文件中。这通常用于性能分析和调试，以了解在特定时间段内系统的行为和性能瓶颈。

2、也可以运行shell文件

#!/bin/bash
adb shell perfetto \
  -c - --txt \
  -o /data/misc/perfetto-traces/trace \
<<EOF

buffers: {
    size_kb: 129024
    fill_policy: DISCARD
}
buffers: {
    size_kb: 2048
    fill_policy: DISCARD
}
data_sources: {
    config {
        name: "linux.process_stats"
        target_buffer: 1
        process_stats_config {
            scan_all_processes_on_start: true
        }
    }
}
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: "sched/sched_switch"
            ftrace_events: "power/suspend_resume"
            ftrace_events: "sched/sched_wakeup"
            ftrace_events: "sched/sched_wakeup_new"
            ftrace_events: "sched/sched_waking"
            ftrace_events: "power/cpu_frequency"
            ftrace_events: "power/cpu_idle"
            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: "sm"
            atrace_categories: "audio"
            atrace_categories: "video"
            atrace_categories: "hal"
            atrace_categories: "bionic"
            atrace_categories: "binder_driver"
            atrace_apps: "com.realtek.media.player"
        }
    }
}
duration_ms: 10000

EOF

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

buffers: {
    size_kb: 129024
    fill_policy: DISCARD
}
buffers: {
    size_kb: 2048
    fill_policy: DISCARD
}
data_sources: {
    config {
        name: "android.packages_list"
        target_buffer: 1
    }
}
data_sources: {
    config {
        name: "linux.process_stats"
        target_buffer: 1
        process_stats_config {
            scan_all_processes_on_start: true
        }
    }
}
data_sources: {
    config {
        name: "android.surfaceflinger.frametimeline"
    }
}
data_sources: {
    config {
        name: "linux.ftrace"
        ftrace_config {
            ftrace_events: "binder/*"
            ftrace_events: "block/*"
            ftrace_events: "fastrpc/*"
            ftrace_events: "irq/*"
            ftrace_events: "kmem/*"
            ftrace_events: "mmc/*"
            ftrace_events: "sched/*"
            ftrace_events: "sync/*"
            ftrace_events: "task/*"
            ftrace_events: "sched/sched_switch"
            ftrace_events: "power/suspend_resume"
            ftrace_events: "sched/sched_wakeup"
            ftrace_events: "sched/sched_wakeup_new"
            ftrace_events: "sched/sched_waking"
            ftrace_events: "raw_syscalls/sys_enter"
            ftrace_events: "raw_syscalls/sys_exit"
            ftrace_events: "sched/sched_process_exit"
            ftrace_events: "sched/sched_process_free"
            ftrace_events: "task/task_newtask"
            ftrace_events: "task/task_rename"
            ftrace_events: "sched/sched_blocked_reason"
            ftrace_events: "ftrace/print"
            ftrace_events: "mm_event/mm_event_record"
            ftrace_events: "ion/ion_stat"
            ftrace_events: "dmabuf_heap/dma_heap_stat"
            atrace_categories: "am"
            atrace_categories: "adb"
            atrace_categories: "aidl"
            atrace_categories: "dalvik"
            atrace_categories: "audio"
            atrace_categories: "binder_lock"
            atrace_categories: "binder_driver"
            atrace_categories: "bionic"
            atrace_categories: "camera"
            atrace_categories: "database"
            atrace_categories: "gfx"
            atrace_categories: "hal"
            atrace_categories: "input"
            atrace_categories: "network"
            atrace_categories: "nnapi"
            atrace_categories: "pm"
            atrace_categories: "power"
            atrace_categories: "rs"
            atrace_categories: "res"
            atrace_categories: "rro"
            atrace_categories: "sm"
            atrace_categories: "ss"
            atrace_categories: "vibrator"
            atrace_categories: "video"
            atrace_categories: "view"
            atrace_categories: "webview"
            atrace_categories: "wm"
            atrace_apps: "*"
            symbolize_ksyms: true
        }
    }
}
duration_ms: 15000

EOF

参考学习：