[clang] b3f789e - [perf-training] Change profile file pattern string to use %4m instead of %p

[Alex Langford via cfe-commits]

Author: Xin-Xin Wang
Date: 2019-12-17T12:12:21-08:00
New Revision: b3f789e037cbfdb1439c01a4eefc9ab9bb0d2c64

URL: https://github.com/llvm/llvm-project/commit/b3f789e037cbfdb1439c01a4eefc9ab9bb0d2c64
DIFF: https://github.com/llvm/llvm-project/commit/b3f789e037cbfdb1439c01a4eefc9ab9bb0d2c64.diff

LOG: [perf-training] Change profile file pattern string to use %4m instead of %p

Summary: With %p, each test file that we're using to generate profile data will make its own profraw file which is around 60 MB in size. If we have a lot of test files, that quickly uses a lot of space. Use %4m instead to share the profraw files used to store the profile data. We use 4 here based on the default value in https://reviews.llvm.org/source/llvm-github/browse/master/llvm/CMakeLists.txt$604

Reviewers: beanz, phosek, xiaobai, smeenai, vsk

Reviewed By: vsk

Subscribers: vsk, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D71585

Added: 
    

Modified: 
    clang/utils/perf-training/lit.cfg

Removed: 
    


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diff  --git a/clang/utils/perf-training/lit.cfg b/clang/utils/perf-training/lit.cfg
index 67a42345da46..e5b7162e5904 100644
--- a/clang/utils/perf-training/lit.cfg
+++ b/clang/utils/perf-training/lit.cfg
@@ -37,5 +37,5 @@ config.substitutions.append( ('%clang_skip_driver', ' %s %s %s ' % (cc1_wrapper,
 config.substitutions.append( ('%clang', ' %s %s ' % (config.clang, sysroot_flags) ) )
 config.substitutions.append( ('%test_root', config.test_exec_root ) )
 
-config.environment['LLVM_PROFILE_FILE'] = 'perf-training-%p.profraw'
+config.environment['LLVM_PROFILE_FILE'] = 'perf-training-%4m.profraw'