On 18/08/16 16:27, Dave Gordon wrote:
On 18/08/16 13:01, John Harrison wrote:
[snip]
Can you post the numbers that you get?
I seem to get massive variability on my BDW. The render ring always
gives me around 2.9us/batch but the other rings sometimes give me region
of 1.2us and sometimes 7-8us.
skylake# ./intel-gpu-tools/tests/gem_exec_nop --run-subtest basic
IGT-Version: 1.15-gd09ad86 (x86_64) (Linux:
4.8.0-rc1-dsg-10839-g5e5a29c-z-tvrtko-fwname x86_64)
Using GuC submission
render: 594,944 cycles: 3.366us/batch
bsd: 737,280 cycles: 2.715us/batch
blt: 833,536 cycles: 2.400us/batch
vebox: 710,656 cycles: 2.818us/batch
Slowest engine was render, 3.366us/batch
Total for all 4 engines is 11.300us per cycle, average 2.825us/batch
All 4 engines (parallel/64): 5,324,800 cycles, average 1.878us/batch,
overlap 90.1%
Subtest basic: SUCCESS (18.013s)
That was GuC f/w 6.1, here's the results from 8.11:
skylake# sudo ./intel-gpu-tools/tests/gem_exec_nop --run-subtest basic
IGT-Version: 1.15-gd09ad86 (x86_64) (Linux:
4.8.0-rc2-dsg-11313-g7430e5f-dsg-work-101 x86_64)
Using GuC submission
render: 585,728 cycles: 3.418us/batch
bsd: 930,816 cycles: 2.151us/batch
blt: 930,816 cycles: 2.150us/batch
vebox: 930,816 cycles: 2.150us/batch
Slowest engine was render, 3.418us/batch
Total for all 4 engines is 9.869us per cycle, average 2.467us/batch
All 4 engines (parallel/64): 5,668,864 cycles, average 1.765us/batch,
overlap 89.9%
Subtest basic: SUCCESS (18.016s)
... showing minor improvements generally, especially the non-render engines.
.Dave.
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