On Tue, Aug 30, 2011 at 10:53 AM, Turgis, Frederic <f-tur...@ti.com> wrote: > Hi, > > As indicated by Siamashka, we are expected to operate at scheduler tick rate, > i.e. 128Hz (drivers/oprofile/timer_int.c). From your test, we have 84 ticks, > i.e. 656ms of test. > Is that correct ? I checked that also in our Android kernel and it was the > same.
Makes sense, but it brings me back to my earlier lament, that a user tunable option to up the rate for the purpose of collecting more samples would be quite desirable. > The only impacts we have seen in the past are related to idle time. For same > duration, we had less ticks if more idle time. But Android guys, who used it > more than us, never really complained on this or timer granularity. Probably > this was more orented to multimedia use cases so 10s of s. > > > Regards > Fred > > Frederic Turgis > OMAP Platform Business Unit - OMAP System Engineering - Platform Enablement > > > >> > Texas Instruments France SA, 821 Avenue Jack Kilby, 06270 Villeneuve Loubet. > 036 420 040 R.C.S Antibes. Capital de EUR 753.920 -- Regards, Tom "We want great men who, when fortune frowns will not be discouraged." - Colonel Henry Knox Linaro.org │ Open source software for ARM SoCs w) tom.gall att linaro.org w) tom_gall att vnet.ibm.com h) tom_gall att mac.com _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
