Messages in this thread | | | Subject | Re: [RFC][PATCH 00/11] perf pmu interface -v2 | From | Will Deacon <> | Date | Fri, 25 Jun 2010 15:36:44 +0100 |
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Hello,
On Fri, 2010-06-25 at 12:16 +0100, Peter Zijlstra wrote: > I seem to have lost a refresh before sending the emails, please check: > > git://git.kernel.org/pub/scm/linux/kernel/git/peterz/linux-2.6-perf.git perf-pmu > > I pushed out updated patches there.
Ok, I rebuilt my Kernel and perf tools from that tree and tested it on a quad-core ARMv7 board. Per-task counters appear to work (software and hardware) but pinned hardware counters always return 0:
root@will-lucid-nfs:~# perf stat -a -e cs -e cycles -e instructions -- ls linux-2.6 tmp
Performance counter stats for 'ls':
33 context-switches 0 cycles 0 instructions # 0.000 IPC
0.028572009 seconds time elapsed
It's odd if only ARM is affected in this way. Do pinned events still work for other people?
Will
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