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author | 2020-10-09 10:28:43 +0800 | |
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committer | 2020-10-14 13:34:06 -0300 | |
commit | 28904f4dcea1444adea4b51ba0af32d6c7314101 (patch) | |
tree | fef3a19d2d8e12e8221cccdb28be36ab8b67cebc /tools/perf/util/callchain.c | |
parent | perf streams: Link stream pair (diff) | |
download | linux-28904f4dcea1444adea4b51ba0af32d6c7314101.tar.gz linux-28904f4dcea1444adea4b51ba0af32d6c7314101.tar.bz2 linux-28904f4dcea1444adea4b51ba0af32d6c7314101.zip |
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>
Diffstat (limited to 'tools/perf/util/callchain.c')
-rw-r--r-- | tools/perf/util/callchain.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c index d356e73c5622..4f824bfcc072 100644 --- a/tools/perf/util/callchain.c +++ b/tools/perf/util/callchain.c @@ -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; +} |