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>

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 29bfca7..b6595e9 100644 (file)
--- 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");