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Cycles: Disable OpenCL clFlush workarounds

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This is something which was reported to work fine by Mai, Benjamin and
confirmed by myself. Disabling this workaround gains us some speedup:

                      Before           Now
bmw27                04:28.42        04:07.79
classroom            09:26.48        08:54.53
fishy_cat            08:44.01        08:18.70
koro                 09:17.98        08:57.18
pavillon_barcelone   12:26.64        11:52.81

Test environment is:
- Ubuntu 16.04, with all updates installed
- AMD RX 480 GPU
- amdgpu pro driver version 17.10-450821
This commit is contained in:
Sergey Sharybin
2017-07-11 12:16:58 +02:00
parent 36ef6ff66b
commit e26f61a2b5
1 changed files with 3 additions and 0 deletions
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3
intern/cycles/device/opencl/opencl.h
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@@ -27,6 +27,9 @@
CCL_NAMESPACE_BEGIN
/* Disable workarounds, seems to be working fine on latest drivers. */
#define CYCLES_DISABLE_DRIVER_WORKAROUNDS
/* Define CYCLES_DISABLE_DRIVER_WORKAROUNDS to disable workaounds for testing */
#ifndef CYCLES_DISABLE_DRIVER_WORKAROUNDS
/* Work around AMD driver hangs by ensuring each command is finished before doing anything else. */