Messages in this thread | | | Date | Thu, 7 Jun 2012 22:23:55 +0200 | From | Andi Kleen <> | Subject | perf user tool precise attribute broken in 3.5rc1+ |
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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?
./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.
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