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Commit 97f85756 authored by Kalesh Singh's avatar Kalesh Singh Committed by Automerger Merge Worker
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Merge "mm_events: Add knob to remove mm_event tracing instance" am: f4d123f8 

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1780365

Change-Id: I3724ac14888eb641e729b801d5fa132ad2e860ad
parents a874239d f4d123f8

cmds/atrace/atrace.rc

+12 −1
Original line number Diff line number Diff line
@@ -266,7 +266,10 @@ on late-init 
    chmod 0666 /sys/kernel/debug/tracing/per_cpu/cpu15/trace

    chmod 0666 /sys/kernel/tracing/per_cpu/cpu15/trace



on post-fs-data

# Only create the tracing instance if persist.mm_events.enabled

# Attempting to remove the tracing instance after it has been created

# will likely fail with EBUSY as it would be in use by traced_probes.

on post-fs-data && property:persist.mm_events.enabled=true

# Create MM Events Tracing Instance for Kmem Activity Trigger

    mkdir /sys/kernel/debug/tracing/instances/mm_events 0755 system system

    mkdir /sys/kernel/tracing/instances/mm_events 0755 system system
@@ -275,10 +278,18 @@ on post-fs-data 
    chmod 0666 /sys/kernel/debug/tracing/instances/mm_events/buffer_size_kb

    chmod 0666 /sys/kernel/tracing/instances/mm_events/buffer_size_kb



# Set the default buffer size to the minimum

    write /sys/kernel/debug/tracing/instances/mm_events/buffer_size_kb 1

    write /sys/kernel/tracing/instances/mm_events/buffer_size_kb 1



# Read and enable tracing

    chmod 0666 /sys/kernel/debug/tracing/instances/mm_events/tracing_on

    chmod 0666 /sys/kernel/tracing/instances/mm_events/tracing_on



# Tracing disabled by default

    write /sys/kernel/debug/tracing/instances/mm_events/tracing_on 0

    write /sys/kernel/tracing/instances/mm_events/tracing_on 0



# Read and truncate kernel trace

    chmod 0666 /sys/kernel/debug/tracing/instances/mm_events/trace

    chmod 0666 /sys/kernel/tracing/instances/mm_events/trace