Messages in this thread | | | Date | Thu, 7 Jun 2012 22:53:19 +0200 | Subject | Re: perf user tool precise attribute broken in 3.5rc1+ | From | Stephane Eranian <> |
| |
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.
> ./t: Terminated > > With an older perf it works, so the kernel is ok. > > ak@petrock:~> ./perf record -e cycles:p ./t > [ perf record: Woken up 1 times to write data ] > [ perf record: Captured and wrote 0.005 MB perf.data (~217 samples) ] > ak@petrock:~> > > > -Andi > -- > ak@linux.intel.com -- Speaking for myself only. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |