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| author | Kan Liang <kan.liang@intel.com> | 2016-04-25 08:28:09 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-04-26 01:35:59 +0200 |
| commit | 09623d79466e996f5dc2753e16f04fda6f078041 (patch) | |
| tree | 0e322e3672fb9e89220b5534b6a6afc09a2d682d /tools/perf/util/hist.c | |
| parent | perf intel-pt: Fix off-by-one comparison on maximum code (diff) | |
| download | linux-09623d79466e996f5dc2753e16f04fda6f078041.tar.xz linux-09623d79466e996f5dc2753e16f04fda6f078041.zip | |
perf hists: Clear dummy entry accumulated period
The accumulated period for dummy entry should also be 0. Otherwise, the
total overhead could be overcounted.
$ perf record -e '{LLC-load-misses,cpu/instructions/}' --call-graph=lbr ./tchain
$ perf report --stdio
# To display the perf.data header info, please use --header/--header-only options.
#
# Total Lost Samples: 0
#
# Samples: 21K of event 'anon group { LLC-load-misses, cpu/instructions/ }'
# Event count (approx.): 16313667937
#
# Children Self Command Shared Object Symbol
# ................ ................ ........... ................ ............................
#
4769.98% 0.01% 0.00% 0.01% tchain_edit [kernel.vmlinux] [k] update_fast_timekeeper
4356.18% 0.01% 0.00% 0.01% tchain_edit [kernel.vmlinux] [k] trigger_load_balance
3181.12% 0.01% 0.00% 0.01% tchain_edit [kernel.vmlinux] [k] irq_work_tick
1592.37% 0.00% 0.00% 0.00% tchain_edit [kernel.vmlinux] [k] cpu_needs_another_gp
Signed-off-by: Kan Liang <kan.liang@intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1461565689-5862-1-git-send-email-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/hist.c')
| -rw-r--r-- | tools/perf/util/hist.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c index 991a351a8a41..0f33d7e698c4 100644 --- a/tools/perf/util/hist.c +++ b/tools/perf/util/hist.c @@ -2062,6 +2062,8 @@ static struct hist_entry *hists__add_dummy_entry(struct hists *hists, if (he) { memset(&he->stat, 0, sizeof(he->stat)); he->hists = hists; + if (symbol_conf.cumulate_callchain) + memset(he->stat_acc, 0, sizeof(he->stat)); rb_link_node(&he->rb_node_in, parent, p); rb_insert_color(&he->rb_node_in, root); hists__inc_stats(hists, he); |