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Message-ID: <20120607212759.GD30641@infradead.org> Date: Thu, 7 Jun 2012 18:28:00 -0300 From: Arnaldo Carvalho de Melo <acme@...hat.com> To: Andi Kleen <andi@...stfloor.org> Cc: Stephane Eranian <eranian@...gle.com>, jolsa@...hat.com, linux-kernel@...r.kernel.org Subject: Re: perf user tool precise attribute broken in 3.5rc1+ Em Thu, Jun 07, 2012 at 10:58:36PM +0200, Andi Kleen escreveu: > 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@...stfloor.org> wrote: > > > > > > With a perf user tool compiled from a 3.5rc1+ kernel I cannot > > > use the 'p' attribute anymore. Always get > > > > > > ak@...rock:~> ./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. Are you sure the old one works? Perhaps it silently falls back to cpu-clock? What 'perf evlist -v' says? - Arnaldo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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