* [PATCH] drm/i915: Defer unmasking RPS interrupts until after making adjustments
@ 2017-02-23 14:33 Chris Wilson
2017-02-23 15:22 ` ✓ Fi.CI.BAT: success for " Patchwork
0 siblings, 1 reply; 2+ messages in thread
From: Chris Wilson @ 2017-02-23 14:33 UTC (permalink / raw)
To: intel-gfx
To make our adjustments to RPS requires taking a mutex and potentially
sleeping for an unknown duration - until we have completed our
adjustments further RPS interrupts are immaterial (they are based on
stale thresholds) and we can safely ignore them.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
---
drivers/gpu/drm/i915/i915_irq.c | 28 +++++++++++++---------------
1 file changed, 13 insertions(+), 15 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index b6035356712f..8ad0875cff8f 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1150,30 +1150,21 @@ static void gen6_pm_rps_work(struct work_struct *work)
{
struct drm_i915_private *dev_priv =
container_of(work, struct drm_i915_private, rps.work);
- bool client_boost;
+ bool client_boost = false;
int new_delay, adj, min, max;
- u32 pm_iir;
+ u32 pm_iir = 0;
spin_lock_irq(&dev_priv->irq_lock);
- /* Speed up work cancelation during disabling rps interrupts. */
- if (!dev_priv->rps.interrupts_enabled) {
- spin_unlock_irq(&dev_priv->irq_lock);
- return;
+ if (dev_priv->rps.interrupts_enabled) {
+ pm_iir = fetch_and_zero(&dev_priv->rps.pm_iir);
+ client_boost = fetch_and_zero(&dev_priv->rps.client_boost);
}
-
- pm_iir = dev_priv->rps.pm_iir;
- dev_priv->rps.pm_iir = 0;
- /* Make sure not to corrupt PMIMR state used by ringbuffer on GEN6 */
- gen6_unmask_pm_irq(dev_priv, dev_priv->pm_rps_events);
- client_boost = dev_priv->rps.client_boost;
- dev_priv->rps.client_boost = false;
spin_unlock_irq(&dev_priv->irq_lock);
/* Make sure we didn't queue anything we're not going to process. */
WARN_ON(pm_iir & ~dev_priv->pm_rps_events);
-
if ((pm_iir & dev_priv->pm_rps_events) == 0 && !client_boost)
- return;
+ goto out;
mutex_lock(&dev_priv->rps.hw_lock);
@@ -1230,6 +1221,13 @@ static void gen6_pm_rps_work(struct work_struct *work)
}
mutex_unlock(&dev_priv->rps.hw_lock);
+
+out:
+ /* Make sure not to corrupt PMIMR state used by ringbuffer on GEN6 */
+ spin_lock_irq(&dev_priv->irq_lock);
+ if (dev_priv->rps.interrupts_enabled)
+ gen6_unmask_pm_irq(dev_priv, dev_priv->pm_rps_events);
+ spin_unlock_irq(&dev_priv->irq_lock);
}
--
2.11.0
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^ permalink raw reply related [flat|nested] 2+ messages in thread
* ✓ Fi.CI.BAT: success for drm/i915: Defer unmasking RPS interrupts until after making adjustments
2017-02-23 14:33 [PATCH] drm/i915: Defer unmasking RPS interrupts until after making adjustments Chris Wilson
@ 2017-02-23 15:22 ` Patchwork
0 siblings, 0 replies; 2+ messages in thread
From: Patchwork @ 2017-02-23 15:22 UTC (permalink / raw)
To: Chris Wilson; +Cc: intel-gfx
== Series Details ==
Series: drm/i915: Defer unmasking RPS interrupts until after making adjustments
URL : https://patchwork.freedesktop.org/series/20148/
State : success
== Summary ==
Series 20148v1 drm/i915: Defer unmasking RPS interrupts until after making adjustments
https://patchwork.freedesktop.org/api/1.0/series/20148/revisions/1/mbox/
fi-bdw-5557u total:278 pass:267 dwarn:0 dfail:0 fail:0 skip:11
fi-bsw-n3050 total:278 pass:239 dwarn:0 dfail:0 fail:0 skip:39
fi-bxt-j4205 total:278 pass:259 dwarn:0 dfail:0 fail:0 skip:19
fi-bxt-t5700 total:108 pass:95 dwarn:0 dfail:0 fail:0 skip:12
fi-byt-j1900 total:278 pass:251 dwarn:0 dfail:0 fail:0 skip:27
fi-byt-n2820 total:278 pass:247 dwarn:0 dfail:0 fail:0 skip:31
fi-hsw-4770 total:278 pass:262 dwarn:0 dfail:0 fail:0 skip:16
fi-hsw-4770r total:278 pass:262 dwarn:0 dfail:0 fail:0 skip:16
fi-ilk-650 total:278 pass:228 dwarn:0 dfail:0 fail:0 skip:50
fi-ivb-3520m total:278 pass:260 dwarn:0 dfail:0 fail:0 skip:18
fi-ivb-3770 total:278 pass:260 dwarn:0 dfail:0 fail:0 skip:18
fi-kbl-7500u total:278 pass:260 dwarn:0 dfail:0 fail:0 skip:18
fi-skl-6260u total:278 pass:268 dwarn:0 dfail:0 fail:0 skip:10
fi-skl-6700hq total:278 pass:261 dwarn:0 dfail:0 fail:0 skip:17
fi-skl-6700k total:278 pass:256 dwarn:4 dfail:0 fail:0 skip:18
fi-skl-6770hq total:278 pass:268 dwarn:0 dfail:0 fail:0 skip:10
fi-snb-2520m total:278 pass:250 dwarn:0 dfail:0 fail:0 skip:28
fi-snb-2600 total:278 pass:249 dwarn:0 dfail:0 fail:0 skip:29
e5c3890db41e8f63c193ce2d9ba5a3e52e23f82d drm-tip: 2017y-02m-23d-13h-18m-37s UTC integration manifest
6f66a51 drm/i915: Defer unmasking RPS interrupts until after making adjustments
== Logs ==
For more details see: https://intel-gfx-ci.01.org/CI/Patchwork_3947/
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2017-02-23 14:33 [PATCH] drm/i915: Defer unmasking RPS interrupts until after making adjustments Chris Wilson
2017-02-23 15:22 ` ✓ Fi.CI.BAT: success for " Patchwork
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