diff options
| author | Fyodor Kupolov <fkupolov@google.com> | 2018-05-22 18:50:04 -0700 |
|---|---|---|
| committer | Fyodor Kupolov <fkupolov@google.com> | 2018-05-31 11:16:37 -0700 |
| commit | cf0fe2d45666148a9efffebcbdfc55ed9241ac21 (patch) | |
| tree | 2143866bf13287288d884677fcf065d880ae1897 /rs/java/android/renderscript/ProgramFragmentFixedFunction.java | |
| parent | f74c983280e51250f332206bde6dd986f3ea8fee (diff) | |
Use sampling for faster measuring of CPU time
Calling SystemClock.currentThreadTimeMicro() is expensive (order of
1 microsecond).
To mitigate that, we use sampling by measuring every 10th call for the
given class/transaction combination and extrapolate results.
Sampling is not used when --enable-detailed-tracking option is set,
For more compact output, only 90th percentile is printed, unless -a
option is set. Example output:
Per-UID Summary (cpu_time, % of total cpu_time, call_count, exception_count, package/uid):
13095032 43% 44663 0 com.package1/u0a35
8872156 29% 5831 0 com.package2/u0a75
2379684 8% 1549 0 com.package3/u0a23
Test: manual dumpsys binder_calls_stats
Test: BinderCallsStatsTest + BinderCallsStatsPerfTest
Bug: 75318418
Change-Id: I535e796c17e75d70970e227411cdf0e1a4afd81c
Diffstat (limited to 'rs/java/android/renderscript/ProgramFragmentFixedFunction.java')
0 files changed, 0 insertions, 0 deletions