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From: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
To: Chris Wilson <chris@chris-wilson.co.uk>, intel-gfx@lists.freedesktop.org
Cc: stable@vger.kernel.org
Subject: Re: [Intel-gfx] [PATCH] drm/i915/pmu: "Frequency" is reported as accumulated cycles
Date: Mon, 11 Nov 2019 09:11:03 +0000	[thread overview]
Message-ID: <0285daa4-eeb5-b1e1-8b4d-d7220024d429@linux.intel.com> (raw)
In-Reply-To: <20191109105356.5273-1-chris@chris-wilson.co.uk>


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@chris-wilson.co.uk>
> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
> Cc: stable@vger.kernel.org
> ---
>   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

  reply	other threads:[~2019-11-11  9:11 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-09 10:53 [PATCH] drm/i915/pmu: "Frequency" is reported as accumulated cycles Chris Wilson
2019-11-11  9:11 ` Tvrtko Ursulin [this message]
2019-11-11  9:43   ` [Intel-gfx] " Chris Wilson
2019-11-11 10:40     ` Tvrtko Ursulin
2019-11-11 11:59       ` Chris Wilson

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