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svga/drm: Flushing preemptively on a 1/3 of the aperture.
author
José Fonseca
<jfonseca@vmware.com>
Thu, 3 Feb 2011 15:06:39 +0000
(15:06 +0000)
committer
José Fonseca
<jfonseca@vmware.com>
Thu, 3 Feb 2011 15:15:23 +0000
(15:15 +0000)
Exactly one half would be the ideal, but this is a soft limit, and one
more byte over brings us to synchronous behavior.
Flushing when the referred GMR exceeds one third of the aperture gives us
statistically better performance.
src/gallium/winsys/svga/drm/vmw_context.c
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diff --git
a/src/gallium/winsys/svga/drm/vmw_context.c
b/src/gallium/winsys/svga/drm/vmw_context.c
index
11626ee
..
f2124c1
100644
(file)
--- a/
src/gallium/winsys/svga/drm/vmw_context.c
+++ b/
src/gallium/winsys/svga/drm/vmw_context.c
@@
-320,7
+320,7
@@
vmw_swc_region_relocation(struct svga_winsys_context *swc,
* to the FIFO won't cause flushing in the host.
*/
vswc->seen_regions += reloc->buffer->base.size;
- if(vswc->seen_regions >= VMW_GMR_POOL_SIZE/
2
)
+ if(vswc->seen_regions >= VMW_GMR_POOL_SIZE/
3
)
vswc->preemptive_flush = TRUE;
}