diff options
| author | Arjan van de Ven <arjan@linux.intel.com> | 2009-09-24 17:40:13 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-10-01 11:26:40 +0400 |
| commit | 39a90a8ef17fe6fbf4b45e46e3c10d3b8b4a3dea (patch) | |
| tree | 8aa8c5b0486d1d2cedace07bcb9e42189b4ccda5 /tools/perf/util/svghelper.c | |
| parent | 8357275bb919d91093bc5a959932ef7b1ea816e8 (diff) | |
| download | linux-39a90a8ef17fe6fbf4b45e46e3c10d3b8b4a3dea.tar.xz | |
perf timechart: Add a power-only mode
For doing work on the Linux power management components, I need to
make long (30+ seconds) traces. Currently, this then results in a
HUGE svg file, with mostly process data that isn't interesting.
This patch adds a --power-only mode to perf timechart that only
outputs the CPU power section of the SVG; this significantly
reduces the size of the SVG file, making even 30+ second traces
viewable with inkscape.
As a minor tweak for the same effect, the minimum text size is
decreased; current inkscape cannot zoom in deep enough to show text
this small, but it reduces inkscape compute time.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: peterz@infradead.org
LKML-Reference: <20090924154013.0675ab71@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/util/svghelper.c')
| -rw-r--r-- | tools/perf/util/svghelper.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/tools/perf/util/svghelper.c b/tools/perf/util/svghelper.c index a778fd0f4ae4..856655d8b0b8 100644 --- a/tools/perf/util/svghelper.c +++ b/tools/perf/util/svghelper.c @@ -28,7 +28,7 @@ static u64 turbo_frequency, max_freq; int svg_page_width = 1000; -#define MIN_TEXT_SIZE 0.001 +#define MIN_TEXT_SIZE 0.01 static u64 total_height; static FILE *svgfile; @@ -217,6 +217,18 @@ static char *cpu_model(void) } fclose(file); } + + /* CPU type */ + file = fopen("/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies", "r"); + if (file) { + while (fgets(buf, 255, file)) { + unsigned int freq; + freq = strtoull(buf, NULL, 10); + if (freq > max_freq) + max_freq = freq; + } + fclose(file); + } return cpu_m; } |