Displaying 3 results from an estimated 3 matches for "107353".
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10735
2017 Jan 24
3
[InstCombine] rL292492 affected LoopVectorizer and caused 17.30%/11.37% perf regressions on Cortex-A53/Cortex-A15 LNT machines
...If these are reliable results, we have 2 perf wins (puzzle, gramschmidt) on the A53 machine. How do we determine the importance of the sieve benchmark vs. the rest of the suite?
>
> An x86 machine doesn't show any regressions from this change:
> http://llvm.org/perf/db_default/v4/nts/107353 <http://llvm.org/perf/db_default/v4/nts/107353>
>
> Are there target-scope-based guidelines for when something is bad enough to revert?
I don’t think we have any guidelines.
I think my suggestion was more about other regression that we would discover after the release, it was more of...
2017 Jan 24
2
[InstCombine] rL292492 affected LoopVectorizer and caused 17.30%/11.37% perf regressions on Cortex-A53/Cortex-A15 LNT machines
> On Jan 23, 2017, at 3:48 PM, Sanjay Patel via llvm-dev <llvm-dev at lists.llvm.org> wrote:
>
> All targets are likely affected in some way by the icmp+shl fold introduced with r292492. It's a basic pattern that occurs in lots of code. Did you see any perf wins on your targets with this commit?
>
> Sadly, it is also likely that many (all?) targets are negatively
2017 Jan 24
3
[InstCombine] rL292492 affected LoopVectorizer and caused 17.30%/11.37% perf regressions on Cortex-A53/Cortex-A15 LNT machines
...t/v4/nts/107364
If these are reliable results, we have 2 perf wins (puzzle, gramschmidt) on the A53 machine. How do we determine the importance of the sieve benchmark vs. the rest of the suite?
An x86 machine doesn't show any regressions from this change:
http://llvm.org/perf/db_default/v4/nts/107353
Are there target-scope-based guidelines for when something is bad enough to revert?
I don’t think we have any guidelines.
I think my suggestion was more about other regression that we would discover after the release, it was more of a “maturity” call: if we just notice a problem with the commit...