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i965: Maxinum the usage of urb space on SNB.

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SNB has 64k urb space, we only use piece of them.
      The more urb space we alloc,
      the more concurrent vs threads we can run.
      push the urb space usage to the limit.

Signed-off-by: Zou Nan hai <nanhai.zou@intel.com>
This commit is contained in:
Zou Nan hai
2011-03-02 14:23:17 +08:00
parent e8d061fd74
commit f1824905fa
1 changed files with 6 additions and 10 deletions
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src/mesa/drivers/dri/i965/gen6_urb.c
+6 -10
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@@ -34,19 +34,15 @@
static void
prepare_urb( struct brw_context *brw )
{
brw->urb.nr_vs_entries = 24;
if (brw->gs.prog_bo)
brw->urb.nr_gs_entries = 4;
else
brw->urb.nr_gs_entries = 0;
brw->urb.nr_vs_entries = 256;
brw->urb.nr_gs_entries = 256;
/* CACHE_NEW_VS_PROG */
brw->urb.vs_size = MAX2(brw->vs.prog_data->urb_entry_size, 1);
/* Check that the number of URB rows (8 floats each) allocated is less
* than the URB space.
*/
assert((brw->urb.nr_vs_entries +
brw->urb.nr_gs_entries) * brw->urb.vs_size * 8 < 64 * 1024);
if (256 * brw->urb.vs_size > 64 * 1024)
brw->urb.nr_vs_entries = brw->urb.nr_gs_entries =
(64 * 1024 ) / brw->urb.vs_size;
}
static void