Hi,
On 05.10.2017 18:15, Eero Tamminen wrote:
On 05.10.2017 01:16, Eric Anholt wrote:
Kenneth Graunke <kenn...@whitecape.org> writes:
Found while trying to optimize an application.
Not observed to help performance on i965, but should at least reduce
the memory usage of such textures a bit.
I run benchmarks on it on few platforms and didn't see any performance
changes either.
Tested-by: Eero Tamminen <eero.t.tammi...@intel.com>
After looking at the longer time perf trends, there's actually an impact
in one test-case, GLB v2.7 Egypt (when using 1/2 HD screen size). On
half the platforms, the change is still within variance, but not on all
platforms, and ezBench bisected this commit.
It has visible:
- Positive impact on SNB GT2
- Negative impact on BYT, BSW, BXT, SKL GT2, KBL GT2
Impact is most visible on (non-TDP limited) SKL GT2, about 4% drop.
Because of the nature of the test (e.g. easily impacted by power
management because it's partly CPU bound), I don't think this enough of
a reason to revert the change, results might change again when textures
get render buffer compression.
Reviewed-by: Eric Anholt <e...@anholt.net>
- Eero
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