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Date: Thu, 13 Jul 2017 22:11:44 +0900
From: Taeung Song <treeze.taeung@...il.com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: linux-kernel@...r.kernel.org, Namhyung Kim <namhyung@...nel.org>,
Milian Wolff <milian.wolff@...b.com>,
Jiri Olsa <jolsa@...hat.com>
Subject: Re: [PATCH 3/4] perf annotate: Support --show-nr-samples option
Arnaldo,
Additionally I think we need to calculate the percentage with the sample
period,
not number of samples like perf-report.
What do you think about it ?
For examples, perf-annotate figure out the percentage with number of
samples like below
ui/gtk/annotate.c:
23 static int perf_gtk__get_percent(char *buf, size_t size, struct
symbol *sym,
24 struct disasm_line *dl, int evidx)
25 {
...
36 symhist = annotation__histogram(symbol__annotation(sym),
evidx);
37 if (!symbol_conf.event_group && !symhist->addr[dl->offset])
38 return 0;
39
40 percent = 100.0 * symhist->addr[dl->offset] / symhist->sum;
But perf-report do it with the sample period like below.
ui/hist.c:
363 HPP_PERCENT_FNS(overhead, period)
364 HPP_PERCENT_FNS(overhead_sys, period_sys)
365 HPP_PERCENT_FNS(overhead_us, period_us)
366 HPP_PERCENT_FNS(overhead_guest_sys, period_guest_sys)
367 HPP_PERCENT_FNS(overhead_guest_us, period_guest_us)
368 HPP_PERCENT_ACC_FNS(overhead_acc, period)
Thanks,
Taeung
On 07/13/2017 05:13 AM, Arnaldo Carvalho de Melo wrote:
> Em Wed, Jul 12, 2017 at 07:14:14AM +0900, Taeung Song escreveu:
>> Add --show-nr-samples option to perf-annotate
>> so that it corresponds with perf-report.
>> Additionally h->sum is properly renamed h->nr_samples.
>
> Please first do a patch renaming ->sum to ->nr_samples, then a patch
> supportign --show-nr-samples.
>
> We can have this new --show-nr-samples option, but perhaps the best way
> would be to have a hotkey (I guess we have for period, right) for this?
>
> At some point would be good to have some 'S' or other hotkey to save the
> current set of output modifiers (nr-samples column, period column, etc)
> in the .perfconfig file.
>
> - Arnaldo
>
>> Cc: Namhyung Kim <namhyung@...nel.org>
>> Cc: Milian Wolff <milian.wolff@...b.com>
>> Cc: Jiri Olsa <jolsa@...hat.com>
>> Signed-off-by: Taeung Song <treeze.taeung@...il.com>
>> ---
>> tools/perf/builtin-annotate.c | 2 ++
>> tools/perf/ui/gtk/annotate.c | 2 +-
>> tools/perf/util/annotate.c | 30 +++++++++++++++++-------------
>> tools/perf/util/annotate.h | 2 +-
>> 4 files changed, 21 insertions(+), 15 deletions(-)
>>
>> diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
>> index f314661..3cb0223 100644
>> --- a/tools/perf/builtin-annotate.c
>> +++ b/tools/perf/builtin-annotate.c
>> @@ -444,6 +444,8 @@ int cmd_annotate(int argc, const char **argv)
>> "Show event group information together"),
>> OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
>> "Show a column with the sum of periods"),
>> + OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
>> + "Show a column with the number of samples"),
>> OPT_CALLBACK_DEFAULT(0, "stdio-color", NULL, "mode",
>> "'always' (default), 'never' or 'auto' only applicable to --stdio mode",
>> stdio__config_color, "always"),
>> diff --git a/tools/perf/ui/gtk/annotate.c b/tools/perf/ui/gtk/annotate.c
>> index d736fd5..0217619 100644
>> --- a/tools/perf/ui/gtk/annotate.c
>> +++ b/tools/perf/ui/gtk/annotate.c
>> @@ -37,7 +37,7 @@ static int perf_gtk__get_percent(char *buf, size_t size, struct symbol *sym,
>> if (!symbol_conf.event_group && !symhist->addr[dl->offset].nr_samples)
>> return 0;
>>
>> - percent = 100.0 * symhist->addr[dl->offset].nr_samples / symhist->sum;
>> + percent = 100.0 * symhist->addr[dl->offset].nr_samples / symhist->nr_samples;
>>
>> markup = perf_gtk__get_percent_color(percent);
>> if (markup)
>> diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
>> index f7aeb5f..b19e734 100644
>> --- a/tools/perf/util/annotate.c
>> +++ b/tools/perf/util/annotate.c
>> @@ -713,7 +713,7 @@ static int __symbol__inc_addr_samples(struct symbol *sym, struct map *map,
>>
>> offset = addr - sym->start;
>> h = annotation__histogram(notes, evidx);
>> - h->sum++;
>> + h->nr_samples++;
>> h->addr[offset].nr_samples++;
>>
>> pr_debug3("%#" PRIx64 " %s: period++ [addr: %#" PRIx64 ", %#" PRIx64
>> @@ -837,7 +837,7 @@ int hist_entry__inc_addr_samples(struct hist_entry *he, struct perf_sample *samp
>>
>> offset = addr - sym->start;
>> h = annotation__histogram(notes, evidx);
>> - h->sum++;
>> + h->nr_samples++;
>> h->addr[offset].nr_samples++;
>> h->total_period += sample->period;
>> h->addr[offset].period += sample->period;
>> @@ -985,10 +985,10 @@ double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
>> p += h->addr[offset++].period;
>> }
>>
>> - if (h->sum) {
>> + if (h->nr_samples) {
>> *nr_samples = hits;
>> *period = p;
>> - percent = 100.0 * hits / h->sum;
>> + percent = 100.0 * hits / h->nr_samples;
>> }
>> }
>>
>> @@ -1165,6 +1165,9 @@ static int disasm_line__print(struct disasm_line *dl, struct symbol *sym, u64 st
>> if (symbol_conf.show_total_period)
>> color_fprintf(stdout, color, " %11" PRIu64,
>> period);
>> + else if (symbol_conf.show_nr_samples)
>> + color_fprintf(stdout, color, " %7" PRIu64,
>> + nr_samples);
>> else
>> color_fprintf(stdout, color, " %7.2f", percent);
>> }
>> @@ -1711,13 +1714,13 @@ static int symbol__get_source_line(struct symbol *sym, struct map *map,
>> struct sym_hist *h = annotation__histogram(notes, evidx);
>> struct rb_root tmp_root = RB_ROOT;
>> int nr_pcnt = 1;
>> - u64 h_sum = h->sum;
>> + u64 h_sum = h->nr_samples;
>> size_t sizeof_src_line = sizeof(struct source_line);
>>
>> if (perf_evsel__is_group_event(evsel)) {
>> for (i = 1; i < evsel->nr_members; i++) {
>> h = annotation__histogram(notes, evidx + i);
>> - h_sum += h->sum;
>> + h_sum += h->nr_samples;
>> }
>> nr_pcnt = evsel->nr_members;
>> sizeof_src_line += (nr_pcnt - 1) * sizeof(src_line->samples);
>> @@ -1743,8 +1746,8 @@ static int symbol__get_source_line(struct symbol *sym, struct map *map,
>>
>> h = annotation__histogram(notes, evidx + k);
>> nr_samples = h->addr[i].nr_samples;
>> - if (h->sum)
>> - percent = 100.0 * nr_samples / h->sum;
>> + if (h->nr_samples)
>> + percent = 100.0 * nr_samples / h->nr_samples;
>>
>> if (percent > percent_max)
>> percent_max = percent;
>> @@ -1816,7 +1819,7 @@ static void symbol__annotate_hits(struct symbol *sym, struct perf_evsel *evsel)
>> if (h->addr[offset].nr_samples != 0)
>> printf("%*" PRIx64 ": %" PRIu64 "\n", BITS_PER_LONG / 2,
>> sym->start + offset, h->addr[offset].nr_samples);
>> - printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->sum", h->sum);
>> + printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->nr_samples", h->nr_samples);
>> }
>>
>> int symbol__annotate_printf(struct symbol *sym, struct map *map,
>> @@ -1857,9 +1860,10 @@ int symbol__annotate_printf(struct symbol *sym, struct map *map,
>>
>> graph_dotted_len = printf(" %-*.*s| Source code & Disassembly of %s for %s (%" PRIu64 " %s)\n",
>> width, width,
>> - symbol_conf.show_total_period ? "Event count" : "Percent",
>> + symbol_conf.show_total_period ? "Event count" :
>> + symbol_conf.show_nr_samples ? "Samples" : "Percent",
>> d_filename, evsel_name,
>> - symbol_conf.show_total_period ? h->total_period : h->sum,
>> + symbol_conf.show_total_period ? h->total_period : h->nr_samples,
>> symbol_conf.show_total_period ? "event count" : "samples");
>>
>> printf("%-*.*s----\n",
>> @@ -1924,10 +1928,10 @@ void symbol__annotate_decay_histogram(struct symbol *sym, int evidx)
>> struct sym_hist *h = annotation__histogram(notes, evidx);
>> int len = symbol__size(sym), offset;
>>
>> - h->sum = 0;
>> + h->nr_samples = 0;
>> for (offset = 0; offset < len; ++offset) {
>> h->addr[offset].nr_samples = h->addr[offset].nr_samples * 7 / 8;
>> - h->sum += h->addr[offset].nr_samples;
>> + h->nr_samples += h->addr[offset].nr_samples;
>> }
>> }
>>
>> diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
>> index 6b2e645..e4d444a 100644
>> --- a/tools/perf/util/annotate.h
>> +++ b/tools/perf/util/annotate.h
>> @@ -86,7 +86,7 @@ struct sym_sample {
>> };
>>
>> struct sym_hist {
>> - u64 sum;
>> + u64 nr_samples;
>> u64 total_period;
>> struct sym_sample addr[0];
>> };
>> --
>> 2.7.4
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