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sna: Limit the default upload buffer size to half the cpu cache 

This seems to help with small slow caches.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2012-12-17 01:06:57 +00:00
parent 5b0572503e
commit dfe9d18f9f
1 changed files with 2 additions and 0 deletions
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2
src/sna/kgem.c
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@ -1083,6 +1083,8 @@ void kgem_init(struct kgem *kgem, int fd, struct pci_device *dev, unsigned gen)
kgem->buffer_size = 64 * 1024;
while (kgem->buffer_size < kgem->aperture_mappable >> 10)
kgem->buffer_size *= 2;
if (kgem->buffer_size >> 12 > kgem->half_cpu_cache_pages)
kgem->buffer_size = kgem->half_cpu_cache_pages << 12;
DBG(("%s: buffer size=%d [%d KiB]\n", __FUNCTION__,
kgem->buffer_size, kgem->buffer_size / 1024));