Attachment 115208 Details for Bug 90112 – Don't downclock if clients are waiting for GPU results

[patch] Don't downclock if clients are waiting for GPU results

0001-rps-waiters.patch (text/plain), 1.22 KB, created by Chris Wilson on 2015-04-20 07:35:45 UTC

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Creator: Chris Wilson

Created: 2015-04-20 07:35:45 UTC

Size: 1.22 KB

patch

obsolete

>From 67cc0addd7428234fbc40f4e9e57d744c85d1a5d Mon Sep 17 00:00:00 2001
>From: Chris Wilson <chris@chris-wilson.co.uk>
>Date: Sun, 19 Apr 2015 19:21:05 +0100
>Subject: [PATCH] rps-waiters
>
>---
> drivers/gpu/drm/i915/i915_irq.c | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
>diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
>index 6f59a9d308b8..c410d34e964d 100644
>--- a/drivers/gpu/drm/i915/i915_irq.c
>+++ b/drivers/gpu/drm/i915/i915_irq.c
>@@ -1076,6 +1076,18 @@ static u32 vlv_wa_c0_ei(struct drm_i915_private *dev_priv, u32 pm_iir)
> 	return events;
> }
> 
>+static bool any_waiters(struct drm_i915_private *dev_priv)
>+{
>+	struct intel_engine_cs *ring;
>+	int i;
>+
>+	for_each_ring(ring, dev_priv, i)
>+		if (ring->irq_refcount)
>+			return true;
>+
>+	return false;
>+}
>+
> static void gen6_pm_rps_work(struct work_struct *work)
> {
> 	struct drm_i915_private *dev_priv =
>@@ -1120,6 +1132,8 @@ static void gen6_pm_rps_work(struct work_struct *work)
> 			new_delay = dev_priv->rps.efficient_freq;
> 			adj = 0;
> 		}
>+	} else if (any_waiters(dev_priv)) {
>+		adj = 0;
> 	} else if (pm_iir & GEN6_PM_RP_DOWN_TIMEOUT) {
> 		if (dev_priv->rps.cur_freq > dev_priv->rps.efficient_freq)
> 			new_delay = dev_priv->rps.efficient_freq;
>-- 
>2.1.4
>

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Attachments on bug 90112: 115206 | 115207 | 115208 | 115242 | 115243 | 115245 | 115258 | 115538 | 115581 | 115582 | 115583 | 115691 | 115692

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