Displaying 2 results from an estimated 2 matches for "b8dbdefc".
2014 Apr 25
2
[LLVMdev] multithreaded performance disaster with -fprofile-instr-generate (contention on profile counters)
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2014 Apr 23
4
[LLVMdev] multithreaded performance disaster with -fprofile-instr-generate (contention on profile counters)
On Apr 23, 2014, at 7:31 AM, Kostya Serebryany <kcc at google.com> wrote:
> I've run one proprietary benchmark that reflects a large portion of the google's server side code.
> -fprofile-instr-generate leads to 14x slowdown due to counter contention. That's serious.
> Admittedly, there is a single hot function that accounts for half of that slowdown,
> but even if