Author: Madhur Amilkanthwar Date: 2025-05-14T10:23:17+05:30 New Revision: aef39f5dcb8b0c73cef4192c5d49a32de7d4ef44
URL: https://github.com/llvm/llvm-project/commit/aef39f5dcb8b0c73cef4192c5d49a32de7d4ef44 DIFF: https://github.com/llvm/llvm-project/commit/aef39f5dcb8b0c73cef4192c5d49a32de7d4ef44.diff LOG: [Clang][PGO][UserManual] Specify usage of -b flag (#139763) llvm-profgen cannot accept the perf profiles collected without `-b` and errors out with a message `"Invalid perf script input!"`. This can also be validated from the code in function `checkPerfScriptType()` in `tools/llvm-profgen/PerfReader.cpp.` Added: Modified: clang/docs/UsersManual.rst Removed: ################################################################################ diff --git a/clang/docs/UsersManual.rst b/clang/docs/UsersManual.rst index 6f804a10748d8..00899dcb8d8c2 100644 --- a/clang/docs/UsersManual.rst +++ b/clang/docs/UsersManual.rst @@ -2792,6 +2792,9 @@ usual build cycle when using sample profilers for optimization: $ llvm-profgen --binary=./code --output=code.prof --perfdata=perf.data + Please note, ``perf.data`` must be collected with ``-b`` flag to Linux ``perf`` + for the above step to work. + When using SEP the output is in the textual format corresponding to ``llvm-profgen --perfscript``. For example: _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
