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| author | Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> | 2016-02-02 20:41:40 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-02-05 02:38:02 +0100 |
| commit | 0306e481d479a58eff17c27adf213fbb5822946b (patch) | |
| tree | 76aa8ce2f207e9014062b78fe7d72e18e9f115d8 | |
| parent | cpufreq: powernv: Remove cpu_to_chip_id() from hot-path (diff) | |
| download | linux-0306e481d479a58eff17c27adf213fbb5822946b.tar.xz linux-0306e481d479a58eff17c27adf213fbb5822946b.zip | |
cpufreq: powernv/tracing: Add powernv_throttle tracepoint
This patch adds the powernv_throttle tracepoint to trace the CPU
frequency throttling event, which is used by the powernv-cpufreq
driver in POWER8.
Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | include/trace/events/power.h | 22 | ||||
| -rw-r--r-- | kernel/trace/power-traces.c | 1 |
2 files changed, 23 insertions, 0 deletions
diff --git a/include/trace/events/power.h b/include/trace/events/power.h index 284244ebfe8d..19e50300ce7d 100644 --- a/include/trace/events/power.h +++ b/include/trace/events/power.h @@ -38,6 +38,28 @@ DEFINE_EVENT(cpu, cpu_idle, TP_ARGS(state, cpu_id) ); +TRACE_EVENT(powernv_throttle, + + TP_PROTO(int chip_id, const char *reason, int pmax), + + TP_ARGS(chip_id, reason, pmax), + + TP_STRUCT__entry( + __field(int, chip_id) + __string(reason, reason) + __field(int, pmax) + ), + + TP_fast_assign( + __entry->chip_id = chip_id; + __assign_str(reason, reason); + __entry->pmax = pmax; + ), + + TP_printk("Chip %d Pmax %d %s", __entry->chip_id, + __entry->pmax, __get_str(reason)) +); + TRACE_EVENT(pstate_sample, TP_PROTO(u32 core_busy, diff --git a/kernel/trace/power-traces.c b/kernel/trace/power-traces.c index eb4220a132ec..81b87451c0ea 100644 --- a/kernel/trace/power-traces.c +++ b/kernel/trace/power-traces.c @@ -15,4 +15,5 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(suspend_resume); EXPORT_TRACEPOINT_SYMBOL_GPL(cpu_idle); +EXPORT_TRACEPOINT_SYMBOL_GPL(powernv_throttle); |