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Message-ID: <fedc723d-1c8f-fcd7-accb-421707b3a09f@suse.cz>
Date: Fri, 26 Feb 2021 10:24:00 +0100
From: Martin Liška <mliska@...e.cz>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org
Subject: Re: [PATCH] perf annotate: improve --stdio mode
On 2/23/21 8:47 PM, Arnaldo Carvalho de Melo wrote:
> Em Sun, Feb 21, 2021 at 01:46:36PM +0100, Martin Liška escreveu:
>> The patch changes the output format in 2 ways:
>> - line number is displayed for all source lines (matching TUI mode)
>
> Are you aware of 'perf annotate --stdio2' ? If the goal is to make the
> stdio mode better, doing it in that mode would be best, as it was done
> to share as much code as possible, not just the looks, with the TUI
> mode.
Yes, I'm aware of it. My motivation is to generate a HTML perf annotate report
and I see the following parts of --stdio2 not ideal:
- coloring is not available (--stdio-color=always does not work)
- 'Sorted summary for file ' is missing so one can't easily search for
hot spots in browser
- source line number are displayed, but not the source files
- there's a missing option for 'Toggle disassembler output/simplified view' which
is available in TUI mode
That said, the stdio2 annotation report is quite different and so handy for my use case.
>
> I kept --stdio around because changing the output in that way could
> annoy people used to that format.
Sure. But I think the current format provides quite broken visual layout:
0.00 : 405ef1: inc %r15
0.01 : 405ef4: vfmadd213sd 0x2b9b3(%rip),%xmm0,%xmm3 # 4318b0 <_IO_stdin_used+0x8b0>
eff.c:1811 0.67 : 405efd: vfmadd213sd 0x2b9b2(%rip),%xmm0,%xmm3 # 4318b8 <_IO_stdin_used+0x8b8>
: TA + tmpsd * (TB +
vs.
0.00 : 405ef1: inc %r15
0.01 : 405ef4: vfmadd213sd 0x2b9b3(%rip),%xmm0,%xmm3 # 4318b0 <_IO_stdin_used+0x8b0>
0.67 : 405efd: vfmadd213sd 0x2b9b2(%rip),%xmm0,%xmm3 # 4318b8 <_IO_stdin_used+0x8b8> // eff.c:1811
: 1810 TA + tmpsd * (TB +
I bet also the current users of --stdio mode would benefit from it.
What do you think?
Thanks,
Martin
>
> Please take a look at 'man perf-config' and see what can be configured
> for both 'perf annotate --tui' and 'perf annotate --stdio2'.
>
> Perhaps we can do something like:
>
> perf config annotate.stdio=tui_like
>
> And, for completeness have:
>
> perf config annotate.stdio=classical
>
> wdyt?
>
> Looking at the other patches now.
>
> - Arnaldo
>
>> - source locations for the hottest lines are printed
>> at the line end in order to preserve layout
>>
>> Before:
>>
>> 0.00 : 405ef1: inc %r15
>> : tmpsd * (TD + tmpsd * TDD)));
>> 0.01 : 405ef4: vfmadd213sd 0x2b9b3(%rip),%xmm0,%xmm3 # 4318b0 <_IO_stdin_used+0x8b0>
>> : tmpsd * (TC +
>> eff.c:1811 0.67 : 405efd: vfmadd213sd 0x2b9b2(%rip),%xmm0,%xmm3 # 4318b8 <_IO_stdin_used+0x8b8>
>> : TA + tmpsd * (TB +
>> 0.35 : 405f06: vfmadd213sd 0x2b9b1(%rip),%xmm0,%xmm3 # 4318c0 <_IO_stdin_used+0x8c0>
>> : dumbo =
>> eff.c:1809 1.41 : 405f0f: vfmadd213sd 0x2b9b0(%rip),%xmm0,%xmm3 # 4318c8 <_IO_stdin_used+0x8c8>
>> : sumi -= sj * tmpsd * dij2i * dumbo;
>> eff.c:1813 2.58 : 405f18: vmulsd %xmm3,%xmm0,%xmm0
>> 2.81 : 405f1c: vfnmadd213sd 0x30(%rsp),%xmm1,%xmm0
>> 3.78 : 405f23: vmovsd %xmm0,0x30(%rsp)
>> : for (k = 0; k < lpears[i] + upears[i]; k++) {
>> eff.c:1761 0.90 : 405f29: cmp %r15d,%r12d
>>
>> After:
>>
>> 0.00 : 405ef1: inc %r15
>> : 1812 tmpsd * (TD + tmpsd * TDD)));
>> 0.01 : 405ef4: vfmadd213sd 0x2b9b3(%rip),%xmm0,%xmm3 # 4318b0 <_IO_stdin_used+0x8b0>
>> : 1811 tmpsd * (TC +
>> 0.67 : 405efd: vfmadd213sd 0x2b9b2(%rip),%xmm0,%xmm3 # 4318b8 <_IO_stdin_used+0x8b8> // eff.c:1811
>> : 1810 TA + tmpsd * (TB +
>> 0.35 : 405f06: vfmadd213sd 0x2b9b1(%rip),%xmm0,%xmm3 # 4318c0 <_IO_stdin_used+0x8c0>
>> : 1809 dumbo =
>> 1.41 : 405f0f: vfmadd213sd 0x2b9b0(%rip),%xmm0,%xmm3 # 4318c8 <_IO_stdin_used+0x8c8> // eff.c:1809
>> : 1813 sumi -= sj * tmpsd * dij2i * dumbo;
>> 2.58 : 405f18: vmulsd %xmm3,%xmm0,%xmm0 // eff.c:1813
>> 2.81 : 405f1c: vfnmadd213sd 0x30(%rsp),%xmm1,%xmm0
>> 3.78 : 405f23: vmovsd %xmm0,0x30(%rsp)
>> : 1761 for (k = 0; k < lpears[i] + upears[i]; k++) {
>>
>> Where e.g. '// eff.c:1811' shares the same color as the percentantage
>> at the line beginning.
>>
>> Signed-off-by: Martin Liška <mliska@...e.cz>
>> ---
>> tools/perf/util/annotate.c | 30 ++++++++++++++----------------
>> 1 file changed, 14 insertions(+), 16 deletions(-)
>>
>> diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
>> index e60841b86d27..80542012ec1b 100644
>> --- a/tools/perf/util/annotate.c
>> +++ b/tools/perf/util/annotate.c
>> @@ -1366,7 +1366,6 @@ annotation_line__print(struct annotation_line *al, struct symbol *sym, u64 start
>> {
>> struct disasm_line *dl = container_of(al, struct disasm_line, al);
>> static const char *prev_line;
>> - static const char *prev_color;
>> if (al->offset != -1) {
>> double max_percent = 0.0;
>> @@ -1405,20 +1404,6 @@ annotation_line__print(struct annotation_line *al, struct symbol *sym, u64 start
>> color = get_percent_color(max_percent);
>> - /*
>> - * Also color the filename and line if needed, with
>> - * the same color than the percentage. Don't print it
>> - * twice for close colored addr with the same filename:line
>> - */
>> - if (al->path) {
>> - if (!prev_line || strcmp(prev_line, al->path)
>> - || color != prev_color) {
>> - color_fprintf(stdout, color, " %s", al->path);
>> - prev_line = al->path;
>> - prev_color = color;
>> - }
>> - }
>> -
>> for (i = 0; i < nr_percent; i++) {
>> struct annotation_data *data = &al->data[i];
>> double percent;
>> @@ -1439,6 +1424,19 @@ annotation_line__print(struct annotation_line *al, struct symbol *sym, u64 start
>> printf(" : ");
>> disasm_line__print(dl, start, addr_fmt_width);
>> +
>> + /*
>> + * Also color the filename and line if needed, with
>> + * the same color than the percentage. Don't print it
>> + * twice for close colored addr with the same filename:line
>> + */
>> + if (al->path) {
>> + if (!prev_line || strcmp(prev_line, al->path)) {
>> + color_fprintf(stdout, color, " // %s", al->path);
>> + prev_line = al->path;
>> + }
>> + }
>> +
>> printf("\n");
>> } else if (max_lines && printed >= max_lines)
>> return 1;
>> @@ -1454,7 +1452,7 @@ annotation_line__print(struct annotation_line *al, struct symbol *sym, u64 start
>> if (!*al->line)
>> printf(" %*s:\n", width, " ");
>> else
>> - printf(" %*s: %*s %s\n", width, " ", addr_fmt_width, " ", al->line);
>> + printf(" %*s: %-*d %s\n", width, " ", addr_fmt_width, al->line_nr, al->line);
>> }
>> return 0;
>> --
>> 2.30.1
>>
>
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