linux-kernel - [PATCH 11/13] perf kvm: add min and max stats to display

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Date:	Wed,  8 May 2013 22:31:47 -0600
From:	David Ahern <dsahern@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	acme@...stprotocols.net, mingo@...nel.org, fweisbec@...il.com,
	peterz@...radead.org, jolsa@...hat.com, namhyung@...nel.org,
	xiaoguangrong@...ux.vnet.ibm.com, David Ahern <dsahern@...il.com>
Subject: [PATCH 11/13] perf kvm: add min and max stats to display

Signed-off-by: David Ahern <dsahern@...il.com>
Cc: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
---
 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 6071998..905aa75 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

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