forked from luck/tmp_suning_uos_patched
ffe4f3c0d1
Need an initialization function to set min to -1 to differentiate from an actual min of 0. Signed-off-by: David Ahern <dsahern@gmail.com> Reviewed-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Runzhen Wang <runzhen@linux.vnet.ibm.com> Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/1375473947-64285-3-git-send-email-dsahern@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
26 lines
470 B
C
26 lines
470 B
C
#ifndef __PERF_STATS_H
|
|
#define __PERF_STATS_H
|
|
|
|
#include "types.h"
|
|
|
|
struct stats
|
|
{
|
|
double n, mean, M2;
|
|
u64 max, min;
|
|
};
|
|
|
|
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);
|
|
|
|
static inline void init_stats(struct stats *stats)
|
|
{
|
|
stats->n = 0.0;
|
|
stats->mean = 0.0;
|
|
stats->M2 = 0.0;
|
|
stats->min = (u64) -1;
|
|
stats->max = 0;
|
|
}
|
|
#endif
|