On Thu, 2012-03-01 at 16:59 +0000, Turgis, Frederic wrote:
Wrong Dave, I meant Dave Long ;-)
OMAP Platform Business Unit - OMAP System Engineering - Platform Enablement - System Multimedia
Hi Dave,
By the way, in http://lists.linaro.org/pipermail/linaro-dev/2011-September/thread.html#7560, we discussed about oprofile timer mode granularity for platforms, which had the PMU bug that loses PMU interrupts (4430, 4460 and maybe 4470). Was this timer granularity proposed/introduced ? Is it in fact part of perf infrastructure (don't know if perf relies directly on oprofile drivers/oprofile infrastructuret) ?
Sorry for the delay in responding.
As far as I know this has not happened. Such a change would also have to include making the use of timer interrupts (as opposed to PMU counter interrupts) selectable at runtime. I believe the use of timer interrupts for oprofile data collection is still a configuration/boot option. Alternatively we could just decide to deconfigure PMU hardware counters by default to make timers accessible.
-dl