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perf kvm: Add min and max stats to display 

Add max and min times for exit events.

v2: address Xiao's comment to use get_event function for pulling max and
    min from stats struct similar to mean and count

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/1375753297-69645-4-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
David Ahern 2013-08-05 21:41:35 -04:00 committed by Arnaldo Carvalho de Melo
parent 1afe1d1484
commit 62d04dbf36
1 changed files with 17 additions and 4 deletions
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21
tools/perf/builtin-kvm.c
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@ -337,14 +337,19 @@ static void clear_events_cache_stats(struct list_head *kvm_events_cache)
struct list_head *head;
struct kvm_event *event;
unsigned int i;
int j;
for (i = 0; i < EVENTS_CACHE_SIZE; i++) {
head = &kvm_events_cache[i];
list_for_each_entry(event, head, hash_entry) {
/* reset stats for event */
memset(&event->total, 0, sizeof(event->total));
memset(event->vcpu, 0,
event->max_vcpu * sizeof(*event->vcpu));
event->total.time = 0;
init_stats(&event->total.stats);
for (j = 0; j < event->max_vcpu; ++j) {
event->vcpu[j].time = 0;
init_stats(&event->vcpu[j].stats);
}
}
}
}
@ -583,6 +588,8 @@ static int compare_kvm_event_ ## func(struct kvm_event *one, \
GET_EVENT_KEY(time, time);
COMPARE_EVENT_KEY(count, stats.n);
COMPARE_EVENT_KEY(mean, stats.mean);
GET_EVENT_KEY(max, stats.max);
GET_EVENT_KEY(min, stats.min);
#define DEF_SORT_NAME_KEY(name, compare_key) \
{ #name, compare_kvm_event_ ## compare_key }
@ -727,20 +734,26 @@ static void print_result(struct perf_kvm_stat *kvm)
pr_info("%9s ", "Samples%");
pr_info("%9s ", "Time%");
pr_info("%10s ", "Min Time");
pr_info("%10s ", "Max Time");
pr_info("%16s ", "Avg time");
pr_info("\n\n");
while ((event = pop_from_result(&kvm->result))) {
u64 ecount, etime;
u64 ecount, etime, max, min;
ecount = get_event_count(event, vcpu);
etime = get_event_time(event, vcpu);
max = get_event_max(event, vcpu);
min = get_event_min(event, vcpu);
kvm->events_ops->decode_key(kvm, &event->key, decode);
pr_info("%20s ", decode);
pr_info("%10llu ", (unsigned long long)ecount);
pr_info("%8.2f%% ", (double)ecount / kvm->total_count * 100);
pr_info("%8.2f%% ", (double)etime / kvm->total_time * 100);
pr_info("%8" PRIu64 "us ", min / 1000);
pr_info("%8" PRIu64 "us ", max / 1000);
pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount/1e3,
kvm_event_rel_stddev(vcpu, event));
pr_info("\n");