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Date: Wed, 26 Jul 2017 00:53:28 +0900
From: Taeung Song <treeze.taeung@...il.com>
To: Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
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 v3 3/9] perf annotate: Fix wrong --show-total-period
option showing number of samples
Hi Arnaldo,
On 07/25/2017 11:42 PM, Arnaldo Carvalho de Melo wrote:
> Em Tue, Jul 25, 2017 at 06:28:42AM +0900, Taeung Song escreveu:
>> On 07/25/2017 02:37 AM, Arnaldo Carvalho de Melo wrote:
>>> The one above, look further down, from 896bccd3cb8d to 0321d0281cbb,
>>> there are some more missing, but the ones below should be ready for
>>> sending to Ingo, which I plan to do today.
>>
>> I didn't see them..
>> Thank you for adjusted patchset.
>> I checked them a while ago.
>>
>> Would you add Reported-by: Namhyung Kim
>> to the commit 0321d0281cbbb404ea73f9e1869ec8db42e8ddfd ?
>
> Sure, will do.
>
>> And we can handle other patches later,
>> but how about additionally fixing the header
>> on the annotate stdio browser ?
>> (If you don't want to handle additional patches anymore today,
>> I'll send them with next patchset.)
>>
>> "Percent" -> "Event Count"
>>
>> Because I think it would be better to show the proper first column.
>
> Of course, I was coming to that, trying to figure out if what was left
> was just one or even more separate patches, see below
>
>> Moreover there is the below case that is not aligned due to big period
>> values.
>
> So, that "moreover" means its not just one patch, but at least two, i.e.
> when one selects show-total-period we better have more space for that
> column, right?
I got it. will separate this patch.
>
> I'll break the patch below accordingly.
>
> And even then, there is one question left, see below
>
>> perf annotate --stdio -i milian.data --show-total-period
>> Percent | Source code & Disassembly of test for cycles:ppp (1442
>> samples)
>> -------------------------------------------------------------------------------
>> :
>> :
>> :
>> : Disassembly of section .text:
>> ...
>> 0 : 40089d: pxor %xmm1,%xmm1
>> 27288350 : 4008a1: cvtsi2sd %rsi,%xmm1
>> 0 : 4008a6: pxor %xmm5,%xmm5
>>
>>
>> So, I made a patch like below:
>>
>> commit 6b96b9947e83474bd6e6fd09f93c390536bb435b
>> Author: Taeung Song <treeze.taeung@...il.com>
>> Date: Tue Jul 25 06:17:59 2017 +0900
>>
>> perf annotate: Show the proper header when using --show-total-period
>>
>> Currently a first column is only "Percent",
>> so fix it to show correct column name based on given options.
>> (e.g. if using --show-total-period, show "Event count" as a first
>> column)
>>
>> Reported-by: Milian Wolff <milian.wolff@...b.com>
>> Cc: Namhyung Kim <namhyung@...nel.org>
>> Cc: Jiri Olsa <jolsa@...hat.com>
>> Signed-off-by: Taeung Song <treeze.taeung@...il.com>
>>
>> diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
>> index 004072f..0224595 100644
>> --- a/tools/perf/util/annotate.c
>> +++ b/tools/perf/util/annotate.c
>> @@ -1142,7 +1142,7 @@ static int disasm_line__print(struct disasm_line *dl,
>> struct symbol *sym, u64 st
>> color = get_percent_color(percent);
>>
>> if (symbol_conf.show_total_period)
>> - color_fprintf(stdout, color, " %7" PRIu64,
>> + color_fprintf(stdout, color, " %11" PRIu64,
>> sample.period);
>
> this part will be in a separate patch, i.e. something like:
>
> [PATCH] Widen "Period" column when using --show-total-period
>
ok.
>> else
>> color_fprintf(stdout, color, " %7.2f",
>> percent);
>> @@ -1173,6 +1173,10 @@ static int disasm_line__print(struct disasm_line *dl,
>> struct symbol *sym, u64 st
>> if (perf_evsel__is_group_event(evsel))
>> width *= evsel->nr_members;
>>
>> + if (symbol_conf.show_total_period)
>> + width += perf_evsel__is_group_event(evsel) ?
>> + 4 * evsel->nr_members : 4;
>> +
>
> But what about this one? What is that '4' for? Not obvious at first
> sight, can you elaborate on the need for this specific one?
>
Yep, if you check the above code lines, like below:
color_fprintf(stdout, color, " %11" PRIu64,
sample.period);
The above number of letters is 12
i.e. 12 = 1 (" ": white space) + 11 (digits of sample.period)
So, I used '4', because the 'width' variable is initialized as '8'.
Additionally this patch handle the width for group event like below:
$ perf annotate --show-total-period -i group_events.data --stdio
Event count | Source code & Disassembly of
old for cycles (529 samples)
-----------------------------------------------------------------------------------------------------
:
:
:
: Disassembly of section .text:
:
: 0000000000400816
<get_cond_maxprice>:
: get_cond_maxprice():
0 0 7144 : 400816: push %rbp
3480988 0 5709 : 400817: mov %rsp,%rbp
0 0 7522 : 40081a: mov
%edi,-0x24(%rbp)
Sorry, I repeatedly failed to adjust a proper patch unit..
I'll remake this patches based on your comment,
and resend next patchset !
>> if (!*dl->line)
>> printf(" %*s:\n", width, " ");
>> else
>> @@ -1823,8 +1827,14 @@ int symbol__annotate_printf(struct symbol *sym,
>> struct map *map,
>> if (perf_evsel__is_group_event(evsel))
>> width *= evsel->nr_members;
>>
>> + if (symbol_conf.show_total_period)
>> + width += perf_evsel__is_group_event(evsel) ?
>> + 4 * evsel->nr_members : 4;
>
> What about this one?
>
ditto.
>> +
>> graph_dotted_len = printf(" %-*.*s| Source code & Disassembly
>> of %s for %s (%" PRIu64 " samples)\n",
>> - width, width, "Percent", d_filename, evsel_name,
>> h->nr_samples);
>> + width, width,
>> + symbol_conf.show_total_period ? "Event
>> count" : "Percent",
>> + d_filename, evsel_name, h->nr_samples);
>>
>
> this one will be in a separate patch, with the title you chose:
>
> [PATCH] perf annotate: Show the proper header when using --show-total-period
>
ok.
Thanks,
Taeung
>> printf("%-*.*s----\n",
>> graph_dotted_len, graph_dotted_len, graph_dotted_line);
>>
>
> - Arnaldo
>
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