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| duration_ms: 15000
buffers { size_kb: 131072 fill_policy: DISCARD } # 0: heapprofd
buffers { size_kb: 32768 fill_policy: RING_BUFFER } # 1: system context
data_sources {
config {
name: "linux.process_stats"
target_buffer: 1
process_stats_config {
scan_all_processes_on_start: true
proc_stats_poll_ms: 1000
}
}
}
data_sources {
config {
name: "linux.sys_stats"
target_buffer: 1
sys_stats_config {
meminfo_period_ms: 1000
meminfo_counters: MEMINFO_MEM_AVAILABLE
meminfo_counters: MEMINFO_CACHED
meminfo_counters: MEMINFO_SWAP_FREE
meminfo_counters: MEMINFO_ZRAM
vmstat_period_ms: 1000
vmstat_counters: VMSTAT_PGFAULT
vmstat_counters: VMSTAT_PGMAJFAULT
vmstat_counters: VMSTAT_OOM_KILL
}
}
}
data_sources {
config {
name: "linux.ftrace"
target_buffer: 1
ftrace_config {
ftrace_events: "sched/sched_switch"
ftrace_events: "sched/sched_waking"
atrace_categories: "am"
atrace_categories: "view"
atrace_apps: "com.example.app"
}
}
}
data_sources {
config {
name: "track_event"
target_buffer: 1
track_event_config {
disabled_categories: "*"
enabled_categories: "memory"
enabled_categories: "app"
}
}
producer_name_filter: "com.example.app"
}
data_sources {
config {
name: "android.heapprofd"
target_buffer: 0
heapprofd_config {
sampling_interval_bytes: 4096
process_cmdline: "com.example.app"
continuous_dump_config {
dump_phase_ms: 5000
dump_interval_ms: 5000
}
shmem_size_bytes: 8388608
block_client: false
max_heapprofd_memory_kb: 262144
max_heapprofd_cpu_secs: 30
}
}
}
|
这仍然是 native heap 模板，不是图形内存模板。排查 GraphicBuffer、dma-buf、GPU texture、Surface buffer 时，要额外对照 dmabuf、GPU/graphics 计数、dumpsys meminfo Graphics/GL、SurfaceFlinger layer / buffer 信息；heapprofd 只能回答 malloc/new 侧有没有对应贡献。
heapprofd buffer 使用 DISCARD 时，buffer 必须足够大。heap profile 常在 dump 点集中写入，DISCARD 满后会丢新数字，对末尾 diamond 和未释放大头很危险。抓完必须检查 traced_buf_chunks_discarded、heapprofd_* stats；长 Trace 或写入量不确定时，优先给 heapprofd 独立大 buffer，必要时改 RING 并在报告里說明旧 dump 可能被覆盖。
临时排查时，直接把 PBTX 通过 stdin 传给 perfetto 最稳。输出路径在 Android 上放到 /data/misc/perfetto-traces/：
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| adb push config.pbtx /data/local/tmp/config.pbtx
adb shell 'cat /data/local/tmp/config.pbtx | perfetto -c - --txt -o /data/misc/perfetto-traces/heap.pftrace'
adb pull /data/misc/perfetto-traces/heap.pftrace .
|
手写 HeapprofdConfig 和 tools/heap_profile 的默认行为不完全一样。block_client 可以在 heapprofd shared memory 满时阻塞目的進程，换取统计结果完整性；脚本的 --block-client 是默认行为，但手写配置需要自己决定。
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