path: root/tools
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authorThomas Renninger <trenn@suse.de>2010-04-20 13:17:36 +0200
committerDave Jones <davej@redhat.com>2010-08-03 13:47:05 -0400
commit6f4f2723d08534fd4e407e1ef8500b0f4d12c30c (patch)
tree3422ba34e7c6bde7e8d4ca1f1f1ed772efc5cc4c /tools
parent6b72e3934b42930fd40fc42fe762d21be413301c (diff)
[CPUFREQ] x86 cpufreq: Make trace_power_frequency cpufreq driver independent
and fix the broken case if a core's frequency depends on others. trace_power_frequency was only implemented in a rather ungeneric way in acpi-cpufreq driver's target() function only. -> Move the call to trace_power_frequency to cpufreq.c:cpufreq_notify_transition() where CPUFREQ_POSTCHANGE notifier is triggered. This will support power frequency tracing by all cpufreq drivers trace_power_frequency did not trace frequency changes correctly when the userspace governor was used or when CPU cores' frequency depend on each other. -> Moving this into the CPUFREQ_POSTCHANGE notifier and pass the cpu which gets switched automatically fixes this. Robert Schoene provided some important fixes on top of my initial quick shot version which are integrated in this patch: - Forgot some changes in power_end trace (TP_printk/variable names) - Variable dummy in power_end must now be cpu_id - Use static 64 bit variable instead of unsigned int for cpu_id Signed-off-by: Thomas Renninger <trenn@suse.de> CC: davej@redhat.com CC: arjan@infradead.org CC: linux-kernel@vger.kernel.org CC: robert.schoene@tu-dresden.de Tested-by: robert.schoene@tu-dresden.de Signed-off-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'tools')
1 files changed, 6 insertions, 5 deletions
diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
index 5a52ed9fc10b..5161619d4714 100644
--- a/tools/perf/builtin-timechart.c
+++ b/tools/perf/builtin-timechart.c
@@ -300,8 +300,9 @@ struct trace_entry {
struct power_entry {
struct trace_entry te;
- s64 type;
- s64 value;
+ u64 type;
+ u64 value;
+ u64 cpu_id;
#define TASK_COMM_LEN 16
@@ -498,13 +499,13 @@ static int process_sample_event(event_t *event, struct perf_session *session)
return 0;
if (strcmp(event_str, "power:power_start") == 0)
- c_state_start(data.cpu, data.time, pe->value);
+ c_state_start(pe->cpu_id, data.time, pe->value);
if (strcmp(event_str, "power:power_end") == 0)
- c_state_end(data.cpu, data.time);
+ c_state_end(pe->cpu_id, data.time);
if (strcmp(event_str, "power:power_frequency") == 0)
- p_state_change(data.cpu, data.time, pe->value);
+ p_state_change(pe->cpu_id, data.time, pe->value);
if (strcmp(event_str, "sched:sched_wakeup") == 0)
sched_wakeup(data.cpu, data.time, data.pid, te);

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