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| author | Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> | 2012-09-17 12:31:14 +0400 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-09-17 20:10:03 +0400 |
| commit | 0007eceaceb11520071d053acfe06ee3326b1d13 (patch) | |
| tree | d9b96c6a53c1ccca87222003e7c5c0e4b0f171a0 /tools/perf/util/stat.h | |
| parent | 034a9265c289d5298bac7bfd824d3d5b9ec892b4 (diff) | |
| download | linux-0007eceaceb11520071d053acfe06ee3326b1d13.tar.xz | |
perf stat: Move stats related code to util/stat.c
Then, the code can be shared between kvm events and perf stat.
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
[ Dong Hao <haodong@linux.vnet.ibm.com>: rebase it on acme's git tree ]
Signed-off-by: Dong Hao <haodong@linux.vnet.ibm.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: kvm@vger.kernel.org
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Runzhen Wang <runzhen@linux.vnet.ibm.com>
Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1347870675-31495-3-git-send-email-haodong@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/stat.h')
| -rw-r--r-- | tools/perf/util/stat.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h new file mode 100644 index 000000000000..588367c3c767 --- /dev/null +++ b/tools/perf/util/stat.h @@ -0,0 +1,16 @@ +#ifndef __PERF_STATS_H +#define __PERF_STATS_H + +#include "types.h" + +struct stats +{ + double n, mean, M2; +}; + +void update_stats(struct stats *stats, u64 val); +double avg_stats(struct stats *stats); +double stddev_stats(struct stats *stats); +double rel_stddev_stats(double stddev, double avg); + +#endif |