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| author | 2021-07-28 20:01:24 +0000 | |
|---|---|---|
| committer | 2021-07-28 20:01:24 +0000 | |
| commit | 97f857560a56ae9dfb9784e9bcacf5e2413c1273 (patch) | |
| tree | d1e983390a6e735adce59a92aba35f095e993cd3 | |
| parent | a874239ddd49fdcbe35156bdcb57b237a30167eb (diff) | |
| parent | f4d123f8896e5f64d619deca351a7ea64bcf83b0 (diff) | |
Merge "mm_events: Add knob to remove mm_event tracing instance" am: f4d123f889
Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1780365
Change-Id: I3724ac14888eb641e729b801d5fa132ad2e860ad
| -rw-r--r-- | cmds/atrace/atrace.rc | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/cmds/atrace/atrace.rc b/cmds/atrace/atrace.rc index 37fc9a9356..e3c4edebbd 100644 --- a/cmds/atrace/atrace.rc +++ b/cmds/atrace/atrace.rc @@ -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 |