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

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Message-ID: <YG4VTsqJ9V3/hbOG@kernel.org>
Date:   Wed, 7 Apr 2021 17:25:50 -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 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.

- 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;