Re: [PATCH] drm/i915/pmu: "Frequency" is reported as accumulated cycles

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On 09/11/2019 10:53, Chris Wilson wrote:
We report "frequencies" (actual-frequency, requested-frequency) as the
number of accumulated cycles so that the average frequency over that
period may be determined by the user. This means the units we report to
the user are Mcycles (or just M), not MHz.

Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
---
  drivers/gpu/drm/i915/i915_pmu.c | 4 ++--
  1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_pmu.c b/drivers/gpu/drm/i915/i915_pmu.c
index 4804775644bf..9b02be0ad4e6 100644
--- a/drivers/gpu/drm/i915/i915_pmu.c
+++ b/drivers/gpu/drm/i915/i915_pmu.c
@@ -908,8 +908,8 @@ create_event_attributes(struct i915_pmu *pmu)
  		const char *name;
  		const char *unit;
  	} events[] = {
-		__event(I915_PMU_ACTUAL_FREQUENCY, "actual-frequency", "MHz"),
-		__event(I915_PMU_REQUESTED_FREQUENCY, "requested-frequency", "MHz"),
+		__event(I915_PMU_ACTUAL_FREQUENCY, "actual-frequency", "M"),
+		__event(I915_PMU_REQUESTED_FREQUENCY, "requested-frequency", "M"),
  		__event(I915_PMU_INTERRUPTS, "interrupts", NULL),
  		__event(I915_PMU_RC6_RESIDENCY, "rc6-residency", "ns"),
  	};


MHz was wrong yes. But is 'M' established or would 'Mcycles' be better?

Regards,

Tvrtko
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