Messages in this thread | | | Date | Fri, 04 Jan 2013 17:16:27 -0700 | From | David Ahern <> | Subject | Re: PEBS (in perf) stopped working from 3.6 -> 3.7 |
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On 1/4/13 4:47 PM, Steinar H. Gunderson wrote: > [Please Cc me on any replies; I'm not subscribed to lkml] > > Hi, > > I recently upgraded from 3.6.5 to 3.7.1 to get around some MM issues that > have been bothering me. However, it appears it broke PEBS: > > pannekake:/usr/src/linux-3.7.1# perf record -a -e cycles:pp > > Error: sys_perf_event_open() syscall returned with 95 (Operation not supported). /bin/dmesg may provide additional information. > > Fatal: No hardware sampling interrupt available. No APIC? If so then you can boot the kernel with the "lapic" boot parameter to force-enable it.
Known problem. Pick one of: update perf to 3.7, add H to the command (-e cycles:ppH) or apply this patch: https://lkml.org/lkml/2012/12/28/384
David
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