Messages in this thread | | | From | Joakim Zhang <> | Subject | RE: perf top for arm64? | Date | Wed, 11 Dec 2019 01:48:30 +0000 |
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> -----Original Message----- > From: linux-perf-users-owner@vger.kernel.org > <linux-perf-users-owner@vger.kernel.org> On Behalf Of Jiri Olsa > Sent: 2019年12月11日 1:09 > To: John Garry <john.garry@huawei.com> > Cc: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>; > peterz@infradead.org; mingo@redhat.com; > alexander.shishkin@linux.intel.com; namhyung@kernel.org; > mark.rutland@arm.com; will@kernel.org; linux-kernel@vger.kernel.org; > linux-arm-kernel@lists.infradead.org; Linuxarm <linuxarm@huawei.com>; > linux-perf-users@vger.kernel.org > Subject: Re: perf top for arm64? > > On Tue, Dec 10, 2019 at 04:52:52PM +0000, John Garry wrote: > > On 10/12/2019 16:36, Jiri Olsa wrote: > > > On Tue, Dec 10, 2019 at 04:13:49PM +0000, John Garry wrote: > > > > Hi all, > > > > > > > > I find to my surprise that "perf top" does not work for arm64: > > > > > > > > root@ubuntu:/home/john/linux# tools/perf/perf top Couldn't read > > > > the cpuid for this machine: No such file or directory > > > > > > > Hi Jirka, > > > > > there was recent change that check on cpuid and quits: > > > 608127f73779 perf top: Initialize perf_env->cpuid, needed by the > > > per arch annotation init routine > > > > > > > ok, this is new code. I obviously didn't check the git history... > > > > But, apart from this, there are many other places where get_cpuid() is > > called. I wonder what else we're missing out on, and whether we should > > still add it. > > right, I was just wondering how come vendor events are working for you, but > realized we have get_cpuid_str being called in there ;-) > > I think we should add it as you have it prepared already, could you post it with > bigger changelog that would explain where it's being used for arm?
Hi Jirka,
I reported metricgroup cannot work on ARM64 before, however, no one can come up with a solution, could you take a look how to fix it? Thanks a lot!
You can refer to below link for more info: [1] https://www.spinics.net/lists/linux-perf-users/msg09190.html (NACK by Will Deason) [2] https://www.spinics.net/lists/linux-perf-users/msg09324.html
Best Regards, Joakim Zhang > jirka
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