From: Andi Shyti <andi.shyti@intel.com>
To: Chris Wilson <chris@chris-wilson.co.uk>
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: [Intel-gfx] [PATCH] drm/i915/gt: Fix rc6 on Ivybridge
Date: Tue, 4 Feb 2020 11:58:30 +0200 [thread overview]
Message-ID: <20200204095830.GB1670@intel.intel> (raw)
In-Reply-To: <158080738803.27392.10698748710924477408@skylake-alporthouse-com>
> > > The current rc6 threshold is larger than the evaluation interval on
> > > Ivybridge; it never enters rc6. Remove the special casing so it behaves
> > > like the other gen6/gen7, and we see rc6 residencies before we manually
> > > park the system.
> > >
> > > Closes: https://gitlab.freedesktop.org/drm/intel/issues/1114
> > > Testcase: igt/i915_pm_rc6_residency/rc6-idle #ivb
> > > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> > > Cc: Andi Shyti <andi.shyti@intel.com>
> > > ---
> > > drivers/gpu/drm/i915/gt/intel_rc6.c | 5 +----
> > > 1 file changed, 1 insertion(+), 4 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/i915/gt/intel_rc6.c b/drivers/gpu/drm/i915/gt/intel_rc6.c
> > > index 01a99fdbb3c4..682f598f7042 100644
> > > --- a/drivers/gpu/drm/i915/gt/intel_rc6.c
> > > +++ b/drivers/gpu/drm/i915/gt/intel_rc6.c
> > > @@ -226,10 +226,7 @@ static void gen6_rc6_enable(struct intel_rc6 *rc6)
> > >
> > > set(uncore, GEN6_RC_SLEEP, 0);
> > > set(uncore, GEN6_RC1e_THRESHOLD, 1000);
> > > - if (IS_IVYBRIDGE(i915))
> > > - set(uncore, GEN6_RC6_THRESHOLD, 125000);
> > > - else
> > > - set(uncore, GEN6_RC6_THRESHOLD, 50000);
> > > + set(uncore, GEN6_RC6_THRESHOLD, 50000);
> >
> > why was is set like this in a first place?
>
> No one knows.
I haven't found any exception either...
Reviewed-by: Andi Shyti <andi.shyti@intel.com>
Thanks,
Andi
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next prev parent reply other threads:[~2020-02-04 9:58 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-03 20:21 [Intel-gfx] [PATCH] drm/i915/gt: Fix rc6 on Ivybridge Chris Wilson
2020-02-04 9:06 ` Andi Shyti
2020-02-04 9:09 ` Chris Wilson
2020-02-04 9:58 ` Andi Shyti [this message]
2020-02-04 20:05 ` [Intel-gfx] ✓ Fi.CI.BAT: success for " Patchwork
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