linux-kernel - Re: [PATCH] perf annotate: improve --stdio mode

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Message-ID: <YH259OqyzU7P6f7d@kernel.org>
Date:   Mon, 19 Apr 2021 14:12:20 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Martin Liška <mliska@...e.cz>
Cc:     linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org
Subject: Re: [PATCH] perf annotate: improve --stdio mode

Em Mon, Apr 19, 2021 at 09:39:37AM +0200, Martin Liška escreveu:
> @Arnaldo: May I please ping this?

Applied the refreshed version,

- Arnaldo
 
> Thanks,
> Martin
> 
> On 4/8/21 12:08 PM, Martin Liška wrote:
> > On 4/7/21 10:25 PM, Arnaldo Carvalho de Melo wrote:
> >> Em Wed, Apr 07, 2021 at 04:30:46PM -0300, Arnaldo Carvalho de Melo escreveu:
> >>> Em Fri, Feb 26, 2021 at 10:24:00AM +0100, Martin Liška escreveu:
> >>>> On 2/23/21 8:47 PM, Arnaldo Carvalho de Melo wrote:
> >>>> 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?
> >>  
> >>> Agreed, I tried applying but it bitrotted, it seems :-\
> >>
> >> I refreshed it, please check.
> > 
> > Thanks! I've just tested the patch on top of acme/perf/core and it works as was planned.
> > I'm attaching 2 perf annotate snippets (perf annotate --stdio -l --stdio-color=always) before
> > and after the revision:
> > 
> > https://splichal.eu/tmp/perf-before.html
> > https://splichal.eu/tmp/perf-after.html
> > 
> > I hope it nicely describes that it's an improvement.
> > 
> > Cheers,
> > Martin
> > 
> >>
> >> - Arnaldo
> >>
> >> diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
> >> index 18eee25b4976bea8..abe1499a91645375 100644
> >> --- a/tools/perf/util/annotate.c
> >> +++ b/tools/perf/util/annotate.c
> >> @@ -1368,7 +1368,6 @@ 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;
> >> @@ -1407,20 +1406,6 @@ 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;
> >> @@ -1441,6 +1426,19 @@ 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;
> >> @@ -1456,7 +1454,7 @@ 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;
> >>
> > 
> 

-- 

- Arnaldo