Commit-ID: 49cd456af1dcb13ff3e94cb997c82968ae86722a
Gitweb: https://git.kernel.org/tip/49cd456af1dcb13ff3e94cb997c82968ae86722a
Author: Jin Yao <yao.jin@xxxxxxxxxxxxxxx>
AuthorDate: Tue, 5 Dec 2017 22:03:02 +0800
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Wed, 27 Dec 2017 12:15:42 -0300
perf stat: Extend rbtree to support per-thread shadow stats
Previously the rbtree was used to link generic metrics.
This patches adds new ctx/type/stat into rbtree keys because we will use
this rbtree to maintain shadow metrics to replace original a couple of
static arrays for supporting per-thread shadow stats.
Signed-off-by: Jin Yao <yao.jin@xxxxxxxxxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Kan Liang <kan.liang@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1512482591-4646-3-git-send-email-yao.jin@xxxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/util/stat-shadow.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
index 93aac27..528be3e 100644
--- a/tools/perf/util/stat-shadow.c
+++ b/tools/perf/util/stat-shadow.c
@@ -45,7 +45,10 @@ struct stats walltime_nsecs_stats;
struct saved_value {
struct rb_node rb_node;
struct perf_evsel *evsel;
+ enum stat_type type;
+ int ctx;
int cpu;
+ struct runtime_stat *stat;
struct stats stats;
};
@@ -58,6 +61,30 @@ static int saved_value_cmp(struct rb_node *rb_node, const void *entry)
if (a->cpu != b->cpu)
return a->cpu - b->cpu;
+
+ /*
+ * Previously the rbtree was used to link generic metrics.
+ * The keys were evsel/cpu. Now the rbtree is extended to support
+ * per-thread shadow stats. For shadow stats case, the keys
+ * are cpu/type/ctx/stat (evsel is NULL). For generic metrics
+ * case, the keys are still evsel/cpu (type/ctx/stat are 0 or NULL).
+ */
+ if (a->type != b->type)
+ return a->type - b->type;
+
+ if (a->ctx != b->ctx)
+ return a->ctx - b->ctx;
+
+ if (a->evsel == NULL && b->evsel == NULL) {
+ if (a->stat == b->stat)
+ return 0;
+
+ if ((char *)a->stat < (char *)b->stat)
+ return -1;
+
+ return 1;
+ }
+
if (a->evsel == b->evsel)
return 0;
if ((char *)a->evsel < (char *)b->evsel)
--
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