On 09/12/2015 01:42 AM, Ben Widawsky wrote:
> On Fri, Sep 11, 2015 at 11:33:14AM +0300, Abdiel Janulgue wrote:
>> Some updated figures first:
>>
>> Ue4 Reflections Subway demo
>> x fs gather constants disabled
>> + fs gather constants enabled
>>
>> HSW:
>> N Min Max Median Avg Stddev
>> x 10 5.09739 6.48963 6.33357 6.197985 0.40742969
>> + 10 6.56139 6.86579 6.80952 6.758516 0.10267153
>> Difference at 95.0% confidence
>> 0.560531 ± 0.279157
>> 9.04376% ± 4.50399%
>> (Student's t, pooled s = 0.297103)
>>
>> BDW:
>> N Min Max Median Avg Stddev
>> x 10 3.64474 3.69746 3.68596 3.67842 0.015452422
>> + 10 3.77998 3.80967 3.79824 3.795633 0.0079241642
>> Difference at 95.0% confidence
>> 0.117213 ± 0.0115377
>> 3.1865% ± 0.31366%
>> (Student's t, pooled s = 0.0122794)
>
> Does this imply that's the only benchmark which improved, or that it was the
> only one which was run?
My bad, I should have included more:
This is from the another demo featuring heavy usage of UBOs called
"EffectsCave" on Broadwell:
x Gather constants disabled
+ Gather constants Enabled
N Min Max Median Avg
x 10 2.7031 2.72984 2.71062 2.713888 0.0089086734
+ 10 2.80884 2.8562 2.84192 2.839292 0.014203021
Difference at 95.0% confidence
0.125404 +/- 0.0111391
4.62082% +/- 0.410447%
(Student's t, pooled s = 0.0118552)
and when run on Haswell...
N Min Max Median Avg Stddev
x 10 4.09309 4.85978 4.69503 4.611491 0.23659143
+ 10 4.79169 5.25551 5.19242 5.127448 0.16535407
Difference at 95.0% confidence
0.515957 +/- 0.191776
11.1885% +/- 4.15865%
(Student's t, pooled s = 0.204105)
I'll throw in public shader-db results to the mix as well:
total instructions in shared programs: 130441 -> 130357 (-0.06%)
instructions in affected programs: 688 -> 604 (-12.21%)
helped: 12
HURT: 0
GAINED: 0
LOST:
- Abdiel
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