diff --git a/clang/utils/perf-training/lit.cfg b/clang/utils/perf-training/lit.cfg
index 67a42345da46af..e5b7162e590423 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'