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| author | Prashanth Prakash <[email protected]> | 2017-11-15 10:11:50 -0700 |
|---|---|---|
| committer | Catalin Marinas <[email protected]> | 2018-01-02 13:50:34 +0000 |
| commit | 8b9951ed7e5b517bdd5743d71ac662885d3c7bfc (patch) | |
| tree | dacbbb58604af96ff6161869179d96706b8fb9d6 /tools/perf/scripts/python/bin/export-to-postgresql-report | |
| parent | db50a74d8193944dd1ee488fd2a813a364fbbaa7 (diff) | |
ARM64 / cpuidle: Use new cpuidle macro for entering retention state
CPU_PM_CPU_IDLE_ENTER_RETENTION skips calling cpu_pm_enter() and
cpu_pm_exit(). By not calling cpu_pm functions in idle entry/exit
paths we can reduce the latency involved in entering and exiting
the low power idle state.
On ARM64 based Qualcomm server platform we measured below overhead
for calling cpu_pm_enter and cpu_pm_exit for retention states.
workload: stress --hdd #CPUs --hdd-bytes 32M -t 30
Average overhead of cpu_pm_enter - 1.2us
Average overhead of cpu_pm_exit - 3.1us
Acked-by: Sudeep Holla <[email protected]>
Signed-off-by: Prashanth Prakash <[email protected]>
Signed-off-by: Catalin Marinas <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/bin/export-to-postgresql-report')
0 files changed, 0 insertions, 0 deletions