redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

perf streams: Calculate the sum of total streams hits 

We have used callchain_node->hit to measure the hot level of one stream.
This patch calculates the sum of hits of total streams.

Thus in next patch, we can use following formula to report hot percent
for one stream.

hot percent = callchain_node->hit / sum of total hits

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20201009022845.13141-6-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
zero-sugar-mainline-defconfig
Jin Yao 2020-10-09 10:28:43 +08:00 committed by Arnaldo Carvalho de Melo
parent fa79aa6485
commit 28904f4dce
4 changed files with 38 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
tools/perf/util/callchain.c
View File

@ -1667,3 +1667,35 @@ bool callchain_cnode_matched(struct callchain_node *base_cnode,
return match;
}
static u64 count_callchain_hits(struct hist_entry *he)
{
struct rb_root *root = &he->sorted_chain;
struct rb_node *rb_node = rb_first(root);
struct callchain_node *node;
u64 chain_hits = 0;
while (rb_node) {
node = rb_entry(rb_node, struct callchain_node, rb_node);
chain_hits += node->hit;
rb_node = rb_next(rb_node);
}
return chain_hits;
}
u64 callchain_total_hits(struct hists *hists)
{
struct rb_node *next = rb_first_cached(&hists->entries);
u64 chain_hits = 0;
while (next) {
struct hist_entry *he = rb_entry(next, struct hist_entry,
rb_node);
chain_hits += count_callchain_hits(he);
next = rb_next(&he->rb_node);
}
return chain_hits;
}

3
tools/perf/util/callchain.h
View File

@ -13,6 +13,7 @@ struct ip_callchain;
struct map;
struct perf_sample;
struct thread;
struct hists;
#define HELP_PAD "\t\t\t\t"
@ -302,4 +303,6 @@ void callchain_param_setup(u64 sample_type);
bool callchain_cnode_matched(struct callchain_node *base_cnode,
struct callchain_node *pair_cnode);
u64 callchain_total_hits(struct hists *hists);
#endif /* __PERF_CALLCHAIN_H */

2
tools/perf/util/stream.c
View File

@ -121,6 +121,8 @@ static void init_hot_callchain(struct hists *hists, struct evsel_streams *es)
update_hot_callchain(he, es);
next = rb_next(&he->rb_node);
}
es->streams_hits = callchain_total_hits(hists);
}
static int evlist__init_callchain_streams(struct evlist *evlist,

1
tools/perf/util/stream.h
View File

@ -14,6 +14,7 @@ struct evsel_streams {
int nr_streams_max;
int nr_streams;
int evsel_idx;
u64 streams_hits;
};
struct evlist_streams {