Messages in this thread | | | Date | Thu, 7 Jun 2012 22:58:36 +0200 | From | Andi Kleen <> | Subject | Re: perf user tool precise attribute broken in 3.5rc1+ |
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On Thu, Jun 07, 2012 at 10:53:19PM +0200, Stephane Eranian wrote: > On Thu, Jun 7, 2012 at 10:23 PM, Andi Kleen <andi@firstfloor.org> wrote: > > > > With a perf user tool compiled from a 3.5rc1+ kernel I cannot > > use the 'p' attribute anymore. Always get > > > > ak@petrock:~> ./perf record -e cycles:p ./t > > > > Error: sys_perf_event_open() syscall returned with 22 (Invalid argument). /bin/dmesg may provide additional information. > > > > Fatal: No CONFIG_PERF_EVENTS=y kernel support configured? > > > Remember that PEBS is disabled on SNB unless you have the new ucode + my patch.
This is not the problem. This was actually a -E where it was not disabled in my tree. And the older perf binary works, so it's clearly not a kernel problem.
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