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Message #00062
[Blueprint cpuidle-latency-infrastructure] Framework to measure latency for various cpuidle states for ARM
Blueprint changed by Amit Kucheria:
Whiteboard changed:
Status:
In Progress
+
+ Focus has moved to first getting various cpuidle implementations into
+ mainline before trying to optimise them.
Work Items:
[vishwanath-bs] cpuidle: Problem statement wrt to instrumentation to automate calculation of latencies: DONE
[vishwanath-bs] cpuidle: Add tracepoint instrumentation for automated calculation of idile-state latency: DONE
[vishwanath-bs] cpuidle: Clean up assembly code for ARM context save and restore for OMAP3: DONE
[vishwanath-bs] cpuidle: Post the patches to opensource for review and rework based on comments: DONE
[vishwanath-bs] cpuidle: add power trace events in appropriate places and measure latencies for all C states on OMAP3: DONE
- [vishwanath-bs] cpuidle: Upstream OMAP3 latency changes: BLOCKED
+ [vishwanath-bs] cpuidle: Upstream OMAP3 latency changes: DONE
[vishwanath-bs] cpuidle: Clean up assembly code for ARM context save and restore for OMAP4 (to be done in OMAP4 TI internal tree as OMAP4 cpuidle code is not upstreamed yet): DONE
[vishwanath-bs] cpuidle: add power trace events in appropriate places and measure latencies for all C states on OMAP4 (to be done in OMAP4 TI internal tree as OMAP4 cpuidle code is not upstreamed yet): DONE
[vincent-guittot] cpuidle: Investigate on trace point hooks for CPU Idle latencies on ST-Ericsson SOCs: POSTPONED
[vincent-guittot] cpuidle: Implement and measure cpuidle laencies using trace points on ST-Ericsson SOCs: POSTPONED
[vishwanath-bs] cpuidle: Follow up with implementations on ST-Ericsson and Freescale SOCs and make sure they are in line with aligned approach: POSTPONED
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Framework to measure latency for various cpuidle states for ARM
https://blueprints.launchpad.net/linaro-pm-wg/+spec/cpuidle-latency-infrastructure