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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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| .. | ||
| bugpoint.rst | ||
| FileCheck.rst | ||
| index.rst | ||
| lit.rst | ||
| llc.rst | ||
| lli.rst | ||
| llvm-ar.rst | ||
| llvm-as.rst | ||
| llvm-bcanalyzer.rst | ||
| llvm-build.rst | ||
| llvm-config.rst | ||
| llvm-cov.rst | ||
| llvm-diff.rst | ||
| llvm-dis.rst | ||
| llvm-dwarfdump.rst | ||
| llvm-extract.rst | ||
| llvm-lib.rst | ||
| llvm-link.rst | ||
| llvm-nm.rst | ||
| llvm-profdata.rst | ||
| llvm-readobj.rst | ||
| llvm-stress.rst | ||
| llvm-symbolizer.rst | ||
| opt.rst | ||
| tblgen.rst | ||