The minutes of the weekly call fresh-off-the-oven can be found at:

https://wiki.linaro.org/WorkingGroups/PowerManagement/Meetings/2010-08-04

Attendees:

Linaro: Amit Kucheria, Amit Arora, Vishwanath Sripathy, Yong Shen ARM: Srinivas Kalaga, Robin Randhawa

Action Items from this Meeting * Action: Robin and Srinivas to send mail to team, to target the ftrace patches for upstream. * Action: Amit K to send email regarding power aware scheduling by Intel (CONFIG_SCHED_MC & CONFIG_SCHED_SMT ?) Yes! * ACTION: Yong Shen to test Amit Arora's powertop patches and powerdebug tool. * ACTION: Yong Shen to investigate plugging in cpufreq framework for freescale boards * ACTION: Amit Arora to creat a new wiki page for instructions on how to setup your own git repo on git.linaro.org * ACTION: Amit K to talk to jeremy about power domain framework * ACTION: Amit Arora and Yong to discuss about reporting sensor information (hwmon, or some other source for ARM?)

Action Items from Previous Meeting * ACTIVE (Immediate): o ACTION: Bobby to investigate android contraints (e.g. display keep-alive): CLOSED + Bobby sent a mail. Considering closed. o ACTION: Srinivas to add ftrace item to task list and send patches to linaro: CLOSED + Srinivas has emailed the patches to team. Needed to get time-stamps when system is entering low power state with various workloads o ACTION: Vishwa to create a new blue print for the instrumentation of cpuidle related work: CLOSED + Blue print created and assigned to Vishwa. o ACTION: Amit Arora to create tarballs of his current work and share it internally for testing: CLOSED + considered done, git tree now available on git.linaro.org o ACTION: Amit Kucheria and Vishwa to get inputs from community on the issues related to CPUIDLE governor: POSTPONED until instrumentation work * ACTIVE (Long Term) : o ACTION: Srinivas to provide details of where he believes userspace - kernel interaction is required. (low prio) o ACTION: Bobby to check on multi-core boards availability (request open) o ACTION: ARM to discuss giving out internal Eclipse based tool (similar to powertop) (no ETA as of now) * DORMANT : o ACTION: ARM to share internal instrumentation flow (BAB: we might also align with Linaro on workload discussions) + Might take couple of months

Minutes * ftrace patches part of larger tool work inside ARM, perhaps the ftrace patch doesn't need to wait for the entire tool and can be sent upstream * power aware scheduling using perf counters, cache misses/hits, TLB hits/misses? o ties into instrumentation work for cpuidle being done by Vishwa * Discussion regarding power domain framework o Similar to clock framework o Does SRF replacement handle it? No, according to Vishwa. * displaying sensors information - is it duplicating work done by lm-sensors tool? o figure out what drivers are using hwmon o perhaps it would make sense to use the lm-sensor library (is there any?) to grab this info? * API to read performance counters o arch/arm/kernel/pmu.h perf_event.c o No documentation? (Perhaps we should provide docs?)