Date: Tue, 25 Sep 2012 10:52:49 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r240917 - head/sys/dev/drm2/i915 Message-ID: <201209251052.q8PAqnZP017000@svn.freebsd.org>
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Author: mav Date: Tue Sep 25 10:52:49 2012 New Revision: 240917 URL: http://svn.freebsd.org/changeset/base/240917 Log: Reduce delays in several wait loops from 10ms to 10us, same is it is done in Linux. This substantially increases graphics performance on Ivy Bridge. Submitted by: avg@ Reviewed by: kib@ Modified: head/sys/dev/drm2/i915/i915_drv.c Modified: head/sys/dev/drm2/i915/i915_drv.c ============================================================================== --- head/sys/dev/drm2/i915/i915_drv.c Tue Sep 25 10:42:13 2012 (r240916) +++ head/sys/dev/drm2/i915/i915_drv.c Tue Sep 25 10:52:49 2012 (r240917) @@ -486,14 +486,14 @@ __gen6_gt_force_wake_get(struct drm_i915 count = 0; while (count++ < 50 && (I915_READ_NOTRACE(FORCEWAKE_ACK) & 1)) - DELAY(10000); + DELAY(10); I915_WRITE_NOTRACE(FORCEWAKE, 1); POSTING_READ(FORCEWAKE); count = 0; while (count++ < 50 && (I915_READ_NOTRACE(FORCEWAKE_ACK) & 1) == 0) - DELAY(10000); + DELAY(10); } void @@ -503,14 +503,14 @@ __gen6_gt_force_wake_mt_get(struct drm_i count = 0; while (count++ < 50 && (I915_READ_NOTRACE(FORCEWAKE_MT_ACK) & 1)) - DELAY(10000); + DELAY(10); I915_WRITE_NOTRACE(FORCEWAKE_MT, (1<<16) | 1); POSTING_READ(FORCEWAKE_MT); count = 0; while (count++ < 50 && (I915_READ_NOTRACE(FORCEWAKE_MT_ACK) & 1) == 0) - DELAY(10000); + DELAY(10); } void @@ -572,7 +572,7 @@ __gen6_gt_wait_for_fifo(struct drm_i915_ int loop = 500; u32 fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES); while (fifo <= GT_FIFO_NUM_RESERVED_ENTRIES && loop--) { - DELAY(10000); + DELAY(10); fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES); } if (loop < 0 && fifo <= GT_FIFO_NUM_RESERVED_ENTRIES) {
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