Use hrtimer ;-) Well, to make PMU work, look at linaro-dev mail archives, Lei Ming and Antipov Dmitry had a discussion recently on the right patches
Regards Fred OMAP Platform Business Unit - OMAP System Engineering - Platform Enablement - System Multimedia > Texas Instruments France SA, 821 Avenue Jack Kilby, 06270 Villeneuve Loubet. 036 420 040 R.C.S Antibes. Capital de EUR 753.920 -----Original Message----- > From: zachary6626 [mailto:zachary6...@gmail.com] > Sent: Thursday, March 01, 2012 4:45 PM > To: Turgis, Frederic; Dave Martin > Cc: linaro-dev > Subject: Re: RE: Do ARM Cortex-A9 PMU supoort oprofile > > > Dear Dave and Turgis, > > Thanks for your replying. > I have run oprofile on OMAP4460, but there are many problems. > > My test env is: > oprofile version: 0.9.7 > Android ver: ICS > kernel ver: 3.0 > CPU: OMAP4460 > > Oprofile ran abnormally after I patched the kernel with a patch from > http://omappedia.org/wiki/Android_Debugging#OProfile_on_OMAP4; . > Step1: > # opcontrol --setup > > Step2: > # opcontrol --vmlinux=/vmlinux --kernel-range 0xc0046000,0xc009a000 > --event CPU_CYCLES:25000000 > I analysed the log after send the command "dmesg", found that the PMU > interrupt enable control > bit has been modified, > the oprofile can not work in PMU mode. > > But when I patch the kernel with a patch from > http://ssvb.github.com/2011/08/23/yet-another- > oprofile-tutorial.html. > The oprofile can work in hrtimer mode. > > Could you share some suggestions? > > > > -------------- > zachary6626 > >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) ? > > > >Regards > >Fred > > > >OMAP Platform Business Unit - OMAP System Engineering - Platform Enablement > >- System Multimedia > > > >> > >Texas Instruments France SA, 821 Avenue Jack Kilby, 06270 Villeneuve Loubet. > >036 420 040 R.C.S > Antibes. Capital de EUR 753.920 > > > >-----Original Message----- > >> From: linaro-dev-boun...@lists.linaro.org > >> [mailto:linaro-dev-boun...@lists.linaro.org] On Behalf Of > >> Dave Martin > >> Sent: Thursday, March 01, 2012 9:57 AM > >> To: zachary6626 > >> Cc: linaro-dev > >> Subject: Re: Do ARM Cortex-A9 PMU supoort oprofile > >> > >> On Wed, Feb 29, 2012 at 11:21:58PM +0800, zachary6626 wrote: > >> > Sorry disturbing you! > >> > > >> > I have ask google for do ARM Cortex-A9 PMU supoort oprofile, but it do > >> > not have a answer > definitely > >> . > >> > > >> > So i ask you do ARM Cortex-A9 PMU supoort oprofile. > >> > > >> > Can u help me? > >> > >> In general, yes it does work. But board support is needed in addition > >> to the CPU PMU support. > >> > >> If you're trying to work on omap4 (panda) you may need some extra > >> patches: > >> > >> > >> For more information on this, take a look at the following thread where > >> this issue was discussed recently: > >> > >> http://lists.linaro.org/pipermail/linaro-dev/2012-February/010326.html > >> > >> Cheers > >> ---Dave > >> > >> _______________________________________________ > >> linaro-dev mailing list > >> linaro-dev@lists.linaro.org > >> http://lists.linaro.org/mailman/listinfo/linaro-dev > > _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
