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Subject[PATCH] perf util: SVG performance improvements
From dc31cd02966e59f1db4266e2c25a8bbf6f6e4f5f Mon Sep 17 00:00:00 2001
From: Arjan van de Ven <arjan@linux.intel.com>
Date: Sun, 20 Sep 2009 11:35:53 +0200
Subject: [PATCH] perf util: SVG performance improvements

Tweak the output SVG to increase performance in SVG viewers
by limiting the different types of font sizes and by
smarter transformations on the text.

At least with Inkscape this gives a notable performance improvement
during zoom and scrolling.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
---
tools/perf/util/svghelper.c | 78 ++++++++++++++++++++++++++++++-------------
1 files changed, 55 insertions(+), 23 deletions(-)
diff --git a/tools/perf/util/svghelper.c b/tools/perf/util/svghelper.c
index be1555e..a778fd0 100644
--- a/tools/perf/util/svghelper.c
+++ b/tools/perf/util/svghelper.c
@@ -51,6 +51,25 @@ static double time2pixels(u64 time)
return X;
}

+/*
+ * Round text sizes so that the svg viewer only needs a discrete
+ * number of renderings of the font
+ */
+static double round_text_size(double size)
+{
+ int loop = 100;
+ double target = 10.0;
+
+ if (size >= 10.0)
+ return size;
+ while (loop--) {
+ if (size >= target)
+ return target;
+ target = target / 2.0;
+ }
+ return size;
+}
+
void open_svg(const char *filename, int cpus, int rows, u64 start, u64 end)
{
int new_width;
@@ -122,8 +141,10 @@ void svg_sample(int Yslot, int cpu, u64 start, u64 end)
text_size = text_size/2;
if (text_size > 1.25)
text_size = 1.25;
+ text_size = round_text_size(text_size);
+
if (text_size > MIN_TEXT_SIZE)
- fprintf(svgfile, "<text transform=\"translate(%1.8f,%1.8f)\" font-size=\"%1.6fpt\">%i</text>\n",
+ fprintf(svgfile, "<text x=\"%1.8f\" y=\"%1.8f\" font-size=\"%1.8fpt\">%i</text>\n",
time2pixels(start), Yslot * SLOT_MULT + SLOT_HEIGHT - 1, text_size, cpu + 1);

}
@@ -162,17 +183,20 @@ void svg_waiting(int Yslot, u64 start, u64 end)

text = time_to_string(end-start);

- font_size = 1.0 * (time2pixels(end)-time2pixels(start)) / strlen(text);
+ font_size = 1.0 * (time2pixels(end)-time2pixels(start));

- if (font_size > 0.2)
- font_size = 0.2;
+ if (font_size > 3)
+ font_size = 3;

+ font_size = round_text_size(font_size);

- fprintf(svgfile, "<rect x=\"%4.8f\" width=\"%4.8f\" y=\"%4.1f\" height=\"%4.1f\" class=\"%s\"/>\n",
- time2pixels(start), time2pixels(end)-time2pixels(start), Yslot * SLOT_MULT, SLOT_HEIGHT, style);
+ fprintf(svgfile, "<g transform=\"translate(%4.8f,%4.8f)\">\n", time2pixels(start), Yslot * SLOT_MULT);
+ fprintf(svgfile, "<rect x=\"0\" width=\"%4.8f\" y=\"0\" height=\"%4.1f\" class=\"%s\"/>\n",
+ time2pixels(end)-time2pixels(start), SLOT_HEIGHT, style);
if (font_size > MIN_TEXT_SIZE)
- fprintf(svgfile, "<text transform=\"translate(%1.8f,%1.8f)\" font-size=\"%1.6fpt\">%s</text>\n",
- time2pixels(start), Yslot * SLOT_MULT + 2, font_size, text);
+ fprintf(svgfile, "<text transform=\"rotate(90)\" font-size=\"%1.8fpt\"> %s</text>\n",
+ font_size, text);
+ fprintf(svgfile, "</g>\n");
}

static char *cpu_model(void)
@@ -211,7 +235,7 @@ void svg_cpu_box(int cpu, u64 __max_freq, u64 __turbo_freq)
cpu2y(cpu), SLOT_MULT+SLOT_HEIGHT);

sprintf(cpu_string, "CPU %i", (int)cpu+1);
- fprintf(svgfile, "<text transform=\"translate(%4.8f,%4.8f)\">%s</text>\n",
+ fprintf(svgfile, "<text x=\"%4.8f\" y=\"%4.8f\">%s</text>\n",
10+time2pixels(first_time), cpu2y(cpu) + SLOT_HEIGHT/2, cpu_string);

fprintf(svgfile, "<text transform=\"translate(%4.8f,%4.8f)\" font-size=\"1.25pt\">%s</text>\n",
@@ -225,15 +249,21 @@ void svg_process(int cpu, u64 start, u64 end, const char *type, const char *name
if (!svgfile)
return;

- fprintf(svgfile, "<rect x=\"%4.8f\" width=\"%4.8f\" y=\"%4.1f\" height=\"%4.1f\" class=\"%s\"/>\n",
- time2pixels(start), time2pixels(end)-time2pixels(start), cpu2y(cpu), SLOT_MULT+SLOT_HEIGHT, type);
+
+ fprintf(svgfile, "<g transform=\"translate(%4.8f,%4.8f)\">\n", time2pixels(start), cpu2y(cpu));
+ fprintf(svgfile, "<rect x=\"0\" width=\"%4.8f\" y=\"0\" height=\"%4.1f\" class=\"%s\"/>\n",
+ time2pixels(end)-time2pixels(start), SLOT_MULT+SLOT_HEIGHT, type);
width = time2pixels(end)-time2pixels(start);
if (width > 6)
width = 6;

+ width = round_text_size(width);
+
if (width > MIN_TEXT_SIZE)
- fprintf(svgfile, "<text transform=\"translate(%4.8f,%4.8f) rotate(90)\" font-size=\"%3.4fpt\">%s</text>\n",
- time2pixels(start), cpu2y(cpu), width, name);
+ fprintf(svgfile, "<text transform=\"rotate(90)\" font-size=\"%3.8fpt\">%s</text>\n",
+ width, name);
+
+ fprintf(svgfile, "</g>\n");
}

void svg_cstate(int cpu, u64 start, u64 end, int type)
@@ -254,13 +284,15 @@ void svg_cstate(int cpu, u64 start, u64 end, int type)
time2pixels(start), time2pixels(end)-time2pixels(start),
cpu2y(cpu), SLOT_MULT+SLOT_HEIGHT);

- width = time2pixels(end)-time2pixels(start);
+ width = (time2pixels(end)-time2pixels(start))/2.0;
if (width > 6)
width = 6;

+ width = round_text_size(width);
+
if (width > MIN_TEXT_SIZE)
- fprintf(svgfile, "<text transform=\"translate(%4.8f,%4.8f) rotate(90)\" font-size=\"%3.4fpt\">C%i</text>\n",
- time2pixels(start), cpu2y(cpu), width, type);
+ fprintf(svgfile, "<text x=\"%4.8f\" y=\"%4.8f\" font-size=\"%3.8fpt\">C%i</text>\n",
+ time2pixels(start), cpu2y(cpu)+width, width, type);
}

static char *HzToHuman(unsigned long hz)
@@ -299,7 +331,7 @@ void svg_pstate(int cpu, u64 start, u64 end, u64 freq)
height = 1 + cpu2y(cpu) + SLOT_MULT + SLOT_HEIGHT - height;
fprintf(svgfile, "<line x1=\"%4.8f\" x2=\"%4.8f\" y1=\"%4.1f\" y2=\"%4.1f\" class=\"pstate\"/>\n",
time2pixels(start), time2pixels(end), height, height);
- fprintf(svgfile, "<text transform=\"translate(%4.8f,%4.8f)\" font-size=\"0.25pt\">%s</text>\n",
+ fprintf(svgfile, "<text x=\"%4.8f\" y=\"%4.8f\" font-size=\"0.25pt\">%s</text>\n",
time2pixels(start), height+0.9, HzToHuman(freq));

}
@@ -318,14 +350,14 @@ void svg_partial_wakeline(u64 start, int row1, char *desc1, int row2, char *desc
fprintf(svgfile, "<line x1=\"%4.8f\" y1=\"%4.2f\" x2=\"%4.8f\" y2=\"%4.2f\" style=\"stroke:rgb(32,255,32);stroke-width:0.009\"/>\n",
time2pixels(start), row1 * SLOT_MULT + SLOT_HEIGHT, time2pixels(start), row1 * SLOT_MULT + SLOT_HEIGHT + SLOT_MULT/32);
if (desc2)
- fprintf(svgfile, "<text transform=\"translate(%4.8f,%4.8f) rotate(90)\" font-size=\"0.02pt\">%s &gt;</text>\n",
+ fprintf(svgfile, "<g transform=\"translate(%4.8f,%4.8f)\"><text transform=\"rotate(90)\" font-size=\"0.02pt\">%s &gt;</text></g>\n",
time2pixels(start), row1 * SLOT_MULT + SLOT_HEIGHT + SLOT_HEIGHT/48, desc2);
}
if (row2) {
fprintf(svgfile, "<line x1=\"%4.8f\" y1=\"%4.2f\" x2=\"%4.8f\" y2=\"%4.2f\" style=\"stroke:rgb(32,255,32);stroke-width:0.009\"/>\n",
time2pixels(start), row2 * SLOT_MULT - SLOT_MULT/32, time2pixels(start), row2 * SLOT_MULT);
if (desc1)
- fprintf(svgfile, "<text transform=\"translate(%4.8f,%4.8f) rotate(90)\" font-size=\"0.02pt\">%s &gt;</text>\n",
+ fprintf(svgfile, "<g transform=\"translate(%4.8f,%4.8f)\"><text transform=\"rotate(90)\" font-size=\"0.02pt\">%s &gt;</text></g>\n",
time2pixels(start), row2 * SLOT_MULT - SLOT_MULT/32, desc1);
}
} else {
@@ -333,14 +365,14 @@ void svg_partial_wakeline(u64 start, int row1, char *desc1, int row2, char *desc
fprintf(svgfile, "<line x1=\"%4.8f\" y1=\"%4.2f\" x2=\"%4.8f\" y2=\"%4.2f\" style=\"stroke:rgb(32,255,32);stroke-width:0.009\"/>\n",
time2pixels(start), row2 * SLOT_MULT + SLOT_HEIGHT, time2pixels(start), row2 * SLOT_MULT + SLOT_HEIGHT + SLOT_MULT/32);
if (desc1)
- fprintf(svgfile, "<text transform=\"translate(%4.8f,%4.8f) rotate(90)\" font-size=\"0.02pt\">%s &lt;</text>\n",
+ fprintf(svgfile, "<g transform=\"translate(%4.8f,%4.8f)\"><text transform=\"rotate(90)\" font-size=\"0.02pt\">%s &lt;</text></g>\n",
time2pixels(start), row2 * SLOT_MULT + SLOT_HEIGHT + SLOT_MULT/48, desc1);
}
if (row1) {
fprintf(svgfile, "<line x1=\"%4.8f\" y1=\"%4.2f\" x2=\"%4.8f\" y2=\"%4.2f\" style=\"stroke:rgb(32,255,32);stroke-width:0.009\"/>\n",
time2pixels(start), row1 * SLOT_MULT - SLOT_MULT/32, time2pixels(start), row1 * SLOT_MULT);
if (desc2)
- fprintf(svgfile, "<text transform=\"translate(%4.8f,%4.8f) rotate(90)\" font-size=\"0.02pt\">%s &lt;</text>\n",
+ fprintf(svgfile, "<g transform=\"translate(%4.8f,%4.8f)\"><text transform=\"rotate(90)\" font-size=\"0.02pt\">%s &lt;</text></g>\n",
time2pixels(start), row1 * SLOT_MULT - SLOT_HEIGHT/32, desc2);
}
}
@@ -390,7 +422,7 @@ void svg_text(int Yslot, u64 start, const char *text)
if (!svgfile)
return;

- fprintf(svgfile, "<text transform=\"translate(%4.8f,%4.8f)\">%s</text>\n",
+ fprintf(svgfile, "<text x=\"%4.8f\" y=\"%4.8f\">%s</text>\n",
time2pixels(start), Yslot * SLOT_MULT+SLOT_HEIGHT/2, text);
}

@@ -401,7 +433,7 @@ static void svg_legenda_box(int X, const char *text, const char *style)

fprintf(svgfile, "<rect x=\"%i\" width=\"%4.8f\" y=\"0\" height=\"%4.1f\" class=\"%s\"/>\n",
X, boxsize, boxsize, style);
- fprintf(svgfile, "<text transform=\"translate(%4.8f, %4.8f)\" font-size=\"%4.4fpt\">%s</text>\n",
+ fprintf(svgfile, "<text transform=\"translate(%4.8f, %4.8f)\" font-size=\"%4.8fpt\">%s</text>\n",
X + boxsize + 5, boxsize, 0.8 * boxsize, text);
}

--
1.6.0.6



--
Arjan van de Ven Intel Open Source Technology Centre
For development, discussion and tips for power savings,
visit http://www.lesswatts.org


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