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78dfceef4b
Add a "-j" option to llvm-profdata to control the number of threads used.
Auto-detect NumThreads when it isn't specified, and avoid spawning threads when
they wouldn't be beneficial.
I tested this patch using a raw profile produced by clang (147MB). Here is the
time taken to merge 4 copies together on my laptop:
No thread pool: 112.87s user 5.92s system 97% cpu 2:01.08 total
With 2 threads: 134.99s user 26.54s system 164% cpu 1:33.31 total
Changes since the initial commit:
- When handling odd-length inputs, call ThreadPool::wait() before merging the
last profile. Should fix a race/off-by-one (see r275937).
Differential Revision: https://reviews.llvm.org/D22438
llvm-svn: 275938
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| .. | ||
| Inputs | ||
| c-general.test | ||
| compat.proftext | ||
| count-mismatch.proftext | ||
| gcc-gcov-sample-profile.test | ||
| general.proftext | ||
| hash-mismatch.proftext | ||
| inline-samples.test | ||
| input-filenames.test | ||
| lit.local.cfg | ||
| multiple-inputs.test | ||
| overflow-instr.test | ||
| overflow-sample.test | ||
| raw-32-bits-be.test | ||
| raw-32-bits-le.test | ||
| raw-64-bits-be.test | ||
| raw-64-bits-le.test | ||
| raw-magic-but-no-header.test | ||
| raw-two-profiles.test | ||
| sample-profile-basic.test | ||
| text-dump.test | ||
| text-format-errors.test | ||
| value-prof.proftext | ||
| weight-instr.test | ||
| weight-sample.test | ||