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| author | Yabin Cui <yabinc@google.com> | 2024-02-08 12:09:02 -0800 |
|---|---|---|
| committer | Yabin Cui <yabinc@google.com> | 2024-02-13 12:49:55 -0800 |
| commit | ec4d791d52db4e98eba9544c1b865215d29b6634 (patch) | |
| tree | 37b36f97cb66fd41ffd9231289c023360ffb4f9d /doc/executable_commands_reference.md | |
| parent | fcf547baf46e6aa4c9ce93eee7f4d0edc7f90bc6 (diff) | |
| download | simpleperf-master.tar.gz | |
Update NDK prebuilts to build 11421629.HEADndk-r27-rc1ndk-r27-releasemastermain
Taken from branch aosp-simpleperf-release.
Bug: 323599819
Test: run test/test.py on android N-V for emulators and devices
Test: run test/test.py on darwin/linux/windows
Change-Id: I496b28ebf26e11687a45da0ce5c560ff143c49a0
Diffstat (limited to 'doc/executable_commands_reference.md')
| -rw-r--r-- | doc/executable_commands_reference.md | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/doc/executable_commands_reference.md b/doc/executable_commands_reference.md index 0e29fbf..b5c051a 100644 --- a/doc/executable_commands_reference.md +++ b/doc/executable_commands_reference.md @@ -333,6 +333,27 @@ $ su 0 simpleperf stat --per-core -a --duration 1 $ su 0 simpleperf stat -e cpu-cycles -a --per-thread --per-core --duration 1 ``` +### Monitor different events on different cores + +Android devices usually have big and little cores. Different cores may support different events. +Therefore, we may want to monitor different events on different cores. We can do this using +the `--cpu` option. The `--cpu` option selects the cores on which to monitor events. A `--cpu` +option affects all the following events until meeting another `--cpu` option. The first `--cpu` +option also affects all events before it. Following are some examples: + +```sh +# By default, cpu-cycles and instructions are monitored on all cpus. +$ su 0 simpleperf stat -e cpu-cycles,instructions -a --duration 1 --per-core + +# Use one `--cpu` option to monitor cpu-cycles and instructions only on cpu 0-3,8. +$ su 0 simpleperf stat -e cpu-cycles --cpu 0-3,8 -e instructions -a --duration 1 --per-core + +# Use two `--cpu` options to monitor raw-l3d-cache-refill-rd on cpu 0-3, and raw-l3d-cache-refill on +# cpu 4-8. +$ su 0 simpleperf stat --cpu 0-3 -e raw-l3d-cache-refill-rd --cpu 4-8 -e raw-l3d-cache-refill \ + -a --duration 1 --per-core +``` + ## The record command The record command is used to dump samples of the profiled processes. Each sample can contain |