Re: [PATCH v3] pgo: add clang's Profile Guided Optimization infrastructure

2021-01-12 Thread Nathan Chancellor
On Tue, Jan 12, 2021 at 05:10:04PM +0800, kernel test robot wrote: > Hi Bill, > > I love your patch! Perhaps something to improve: > > [auto build test WARNING on linus/master] > [also build test WARNING on v5.11-rc3] > [cannot apply to powerpc/next s390/features tip/x86/core next-20210111] > [If

Re: [PATCH v3] pgo: add clang's Profile Guided Optimization infrastructure

2021-01-12 Thread kernel test robot
Hi Bill, I love your patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v5.11-rc3] [cannot apply to powerpc/next s390/features tip/x86/core next-20210111] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submi

[PATCH v3] pgo: add clang's Profile Guided Optimization infrastructure

2021-01-11 Thread Bill Wendling
From: Sami Tolvanen Enable the use of clang's Profile-Guided Optimization[1]. To generate a profile, the kernel is instrumented with PGO counters, a representative workload is run, and the raw profile data is collected from /sys/kernel/debug/pgo/profraw. The raw profile data must be processed by