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Subject[PATCH 41/47] perf kvm: Add min and max stats to display
Date
From: David Ahern <dsahern@gmail.com>

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>
---
tools/perf/builtin-kvm.c | 21 +++++++++++++++++----
1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 29bfca7..b6595e9 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);
+ }
}
}
}
@@ -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");
--
1.8.1.4


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