From 58c311da9cec97d7a665156a726bd1653384c65c Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Tue, 22 Apr 2014 09:47:25 +0900 Subject: [PATCH] perf report: Count number of entries separately The hists->nr_entries is counted in multiple places so that they can confuse readers of the code. This is a preparation of later change and do not intend any functional difference. Note that report__collapse_hists() now changed to return nothing since its return value (nr_samples) is only for checking if there's any data in the input file and this can be acheived by checking ->nr_entries. Signed-off-by: Namhyung Kim Link: http://lkml.kernel.org/r/1398327843-31845-2-git-send-email-namhyung@kernel.org Signed-off-by: Jiri Olsa --- tools/perf/builtin-report.c | 42 +++++++++++++++++++------------------ 1 file changed, 22 insertions(+), 20 deletions(-) diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index 76e2bb6cf571..aed52036468d 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -57,6 +57,7 @@ struct report { const char *cpu_list; const char *symbol_filter_str; float min_percent; + u64 nr_entries; DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS); }; @@ -75,6 +76,17 @@ static int report__config(const char *var, const char *value, void *cb) return perf_default_config(var, value, cb); } +static void report__inc_stats(struct report *rep, struct hist_entry *he) +{ + /* + * The @he is either of a newly created one or an existing one + * merging current sample. We only want to count a new one so + * checking ->nr_events being 1. + */ + if (he->stat.nr_events == 1) + rep->nr_entries++; +} + static int report__add_mem_hist_entry(struct report *rep, struct addr_location *al, struct perf_sample *sample, struct perf_evsel *evsel) { @@ -121,6 +133,8 @@ static int report__add_mem_hist_entry(struct report *rep, struct addr_location * goto out; } + report__inc_stats(rep, he); + evsel->hists.stats.total_period += cost; hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE); if (!he->filtered) @@ -176,6 +190,8 @@ static int report__add_branch_hist_entry(struct report *rep, struct addr_locatio goto out; } + report__inc_stats(rep, he); + evsel->hists.stats.total_period += 1; hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE); if (!he->filtered) @@ -212,6 +228,8 @@ static int report__add_hist_entry(struct report *rep, struct perf_evsel *evsel, if (ui__has_annotation()) err = hist_entry__inc_addr_samples(he, evsel->idx, al->addr); + report__inc_stats(rep, he); + evsel->hists.stats.total_period += sample->period; if (!he->filtered) evsel->hists.stats.nr_non_filtered_samples++; @@ -486,24 +504,12 @@ static int report__browse_hists(struct report *rep) return ret; } -static u64 report__collapse_hists(struct report *rep) +static void report__collapse_hists(struct report *rep) { struct ui_progress prog; struct perf_evsel *pos; - u64 nr_samples = 0; - /* - * Count number of histogram entries to use when showing progress, - * reusing nr_samples variable. - */ - evlist__for_each(rep->session->evlist, pos) - nr_samples += pos->hists.nr_entries; - ui_progress__init(&prog, nr_samples, "Merging related events..."); - /* - * Count total number of samples, will be used to check if this - * session had any. - */ - nr_samples = 0; + ui_progress__init(&prog, rep->nr_entries, "Merging related events..."); evlist__for_each(rep->session->evlist, pos) { struct hists *hists = &pos->hists; @@ -512,7 +518,6 @@ static u64 report__collapse_hists(struct report *rep) hists->symbol_filter_str = rep->symbol_filter_str; hists__collapse_resort(hists, &prog); - nr_samples += hists->stats.nr_events[PERF_RECORD_SAMPLE]; /* Non-group events are considered as leader */ if (symbol_conf.event_group && @@ -525,14 +530,11 @@ static u64 report__collapse_hists(struct report *rep) } ui_progress__finish(); - - return nr_samples; } static int __cmd_report(struct report *rep) { int ret; - u64 nr_samples; struct perf_session *session = rep->session; struct perf_evsel *pos; struct perf_data_file *file = session->file; @@ -572,12 +574,12 @@ static int __cmd_report(struct report *rep) } } - nr_samples = report__collapse_hists(rep); + report__collapse_hists(rep); if (session_done()) return 0; - if (nr_samples == 0) { + if (rep->nr_entries == 0) { ui__error("The %s file has no samples!\n", file->path); return 0; } -- 2.20.1