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| author | David Ahern <dsahern@gmail.com> | 2012-05-08 17:28:57 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-05-09 16:57:29 +0200 |
| commit | 028d455b12719a48b1c4b51ce07a074135726f8f (patch) | |
| tree | 08959d68e6f3dc9cbd4d8e14467c1bdc24ade900 /tools/perf/builtin-stat.c | |
| parent | perf report: Fix format string for x86-32 compilation (diff) | |
| download | linux-028d455b12719a48b1c4b51ce07a074135726f8f.tar.xz linux-028d455b12719a48b1c4b51ce07a074135726f8f.zip | |
perf record: Fix fallback to cpu-clock on ppc
perf-record on PPC is not falling back to cpu-clock:
$ perf record -ag -fo /tmp/perf.data -- sleep 1
Error: sys_perf_event_open() syscall returned with 6 (No such device or address). /bin/dmesg may provide additional information.
Fatal: No CONFIG_PERF_EVENTS=y kernel support configured?
The problem is that until 2.6.37 (behavior changed with commit b0a873e)
perf on PPC returns ENXIO when hw_perf_event_init() fails. With this
patch we get the expected behavior:
$ perf record -ag -fo /tmp/perf.data -v -- sleep 1
Old kernel, cannot exclude guest or host samples.
The cycles event is not supported, trying to fall back to cpu-clock-ticks
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.151 MB /tmp/perf.data (~6592 samples) ]
Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1336490937-57106-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions