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From: Andi Shyti <andi@etezian.org>
To: Chris Wilson <chris@chris-wilson.co.uk>
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: [Intel-gfx] [PATCH 9/9] drm/i915/gt: Restore aggressive post-boost downclocking
Date: Mon, 27 Apr 2020 23:42:40 +0300	[thread overview]
Message-ID: <20200427204240.GE3168@jack.zhora.eu> (raw)
In-Reply-To: <158800720069.17035.8320088549773897221@build.alporthouse.com>

Hi Chris,

On Mon, Apr 27, 2020 at 06:06:40PM +0100, Chris Wilson wrote:
> Quoting Chris Wilson (2020-04-27 13:40:46)
> > Quoting Chris Wilson (2020-04-27 09:54:08)
> > > We reduced the clocks slowly after a boost event based on the
> > > observation that the smoothness of animations suffered. However, since
> > > reducing the evalution intervals, we should be able to respond to the
> > > rapidly fluctuating workload of a simple desktop animation and so
> > > restore the more aggressive downclocking.
> > > 
> > > References: 2a8862d2f3da ("drm/i915: Reduce the RPS shock")
> > > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> > 
> > *** ANECDOTAL ***
> 
> > I spot checked a few games during scenes where the GPU was not capped
> > out, and it was drawing about ~100MHz less for ~1W less.
> 
> For example, vsync'ed Talos,
> 
> hw: 59.7
> 2553.86,Joules,power/energy-pkg/,192545269820,100.00,,
> 1355.92,Joules,power/energy-cores/,192545266374,100.00,,
> 556.36,Joules,power/energy-gpu/,192545263536,100.00,,
> 86989,M,i915/actual-frequency/,192545247535,100.00,,
> 12736813129,ns,i915/rc6-residency/,192545239813,100.00,,
> 118321566117,ns,i915/rcs0-busy/,192545235095,100.00,,
> 0,ns,i915/bcs0-busy/,192545229596,100.00,,
> 0,ns,i915/vcs0-busy/,192545222782,100.00,,
> 
> manual: 59.7
> 2490.58,Joules,power/energy-pkg/,190751537693,100.00,,
> 1447.89,Joules,power/energy-cores/,190751542360,100.00,,
> 394.93,Joules,power/energy-gpu/,190751543518,100.00,,
> 67956,M,i915/actual-frequency/,190751526709,100.00,,
> 40240837120,ns,i915/rc6-residency/,190751523820,100.00,,
> 147090761985,ns,i915/rcs0-busy/,190751525291,100.00,,
> 0,ns,i915/bcs0-busy/,190751523611,100.00,,
> 0,ns,i915/vcs0-busy/,190751520733,100.00,,
> 
> > *** ANECDOTAL ***

Thanks anecdotes and the measurements!

Reviewed-by: Andi Shyti <andi.shyti@intel.com>

Andi
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  reply	other threads:[~2020-04-27 21:01 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-27  8:54 [Intel-gfx] [PATCH 1/9] drm/i915/gt: Sanitize GT first Chris Wilson
2020-04-27  8:54 ` [Intel-gfx] [PATCH 2/9] drm/i915/gt: Fix up clock frequency Chris Wilson
2020-04-27 19:52   ` Andi Shyti
2020-04-27 20:03     ` Chris Wilson
2020-04-27  8:54 ` [Intel-gfx] [PATCH 3/9] drm/i915/execlists: Check preempt-timeout target before submit_ports Chris Wilson
2020-04-27  8:54 ` [Intel-gfx] [PATCH 4/9] drm/i915/gt: Always enable busy-stats for execlists Chris Wilson
2020-04-27  8:54 ` [Intel-gfx] [PATCH 5/9] drm/i915/gt: Move rps.enabled/active to flags Chris Wilson
2020-04-27 19:53   ` Andi Shyti
2020-04-27  8:54 ` [Intel-gfx] [PATCH 6/9] drm/i915/gt: Track use of RPS interrupts in flags Chris Wilson
2020-04-27  8:54 ` [Intel-gfx] [PATCH 7/9] drm/i915/gt: Switch to manual evaluation of RPS Chris Wilson
2020-04-27 16:39   ` Andi Shyti
2020-04-27  8:54 ` [Intel-gfx] [PATCH 8/9] drm/i915/gt: Apply the aggressive downclocking to parking Chris Wilson
2020-04-27 20:38   ` Andi Shyti
2020-04-27  8:54 ` [Intel-gfx] [PATCH 9/9] drm/i915/gt: Restore aggressive post-boost downclocking Chris Wilson
2020-04-27 12:40   ` Chris Wilson
2020-04-27 17:06     ` Chris Wilson
2020-04-27 20:42       ` Andi Shyti [this message]
2020-04-27  9:41 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for series starting with [1/9] drm/i915/gt: Sanitize GT first Patchwork
2020-04-27  9:46 ` [Intel-gfx] ✗ Fi.CI.SPARSE: " Patchwork
2020-04-27 10:05 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2020-04-27 11:10 ` [Intel-gfx] ✗ Fi.CI.IGT: failure " Patchwork
2020-04-27 19:51 ` [Intel-gfx] [PATCH 1/9] " Andi Shyti

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