[PATCH 11/16] perf kvm: add min and max stats to display

David Ahern
2013-05-26T00:26:57Z

tools/perf/builtin-kvm.c | 21 ++++++++++++++++++---
1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 15fdf54..9336737 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -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);
+ }
}
}
}
@@ -718,6 +723,7 @@ static void print_result(struct perf_kvm_stat *kvm)
char decode[20];
struct kvm_event *event;
int vcpu = kvm->trace_vcpu;
+ struct kvm_event_stats *kvm_stats;

if (kvm->live) {
puts(CONSOLE_CLEAR);
@@ -731,6 +737,8 @@ 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");

@@ -740,11 +748,18 @@ static void print_result(struct perf_kvm_stat *kvm)
ecount = get_event_count(event, vcpu);
etime = get_event_time(event, vcpu);

+ if (vcpu == -1)
+ kvm_stats = &event->total;
+ else
+ kvm_stats = &event->vcpu[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 ", kvm_stats->stats.min / 1000);
+ pr_info("%8" PRIu64 "us ", kvm_stats->stats.max / 1000);
pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount/1e3,
kvm_event_rel_stddev(vcpu, event));
pr_info("\n");
--
1.7.10.1