perf util: Make the timechart SVG width dynamic

This patch adds a command line option for timechart that allows the
user to specify the width of the SVG file.

This patch also makes sure that each second of recording has at
least 200 units (pixels at 96 DPI) of width.  This impacts
recordings longer than 5 seconds; recordings shorter than 5 second
will scale up to have a width of 1000 units for the whole recording
(as before).

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20090920181416.69570c5d@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 4 insertions, 2 deletions

diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
index 23b3f09d19aa..600406396274 100644
--- a/tools/perf/builtin-timechart.c
+++ b/tools/perf/builtin-timechart.c
@@ -915,9 +915,9 @@ static void write_svg_file(const char *filename)
         if (count < 15)
                 count = determine_display_tasks(TIME_THRESH / 10);
 
-        open_svg(filename, numcpus, count);
+        open_svg(filename, numcpus, count, first_time, last_time);
 
-        svg_time_grid(first_time, last_time);
+        svg_time_grid();
         svg_legenda();
 
         for (i = 0; i < numcpus; i++)
@@ -1132,6 +1132,8 @@ static const struct option options[] = {
                     "input file name"),
         OPT_STRING('o', "output", &output_name, "file",
                     "output file name"),
+        OPT_INTEGER('w', "width", &svg_page_width,
+                    "page width"),
         OPT_END()
 };