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Data race in PGO profile collection for multi-process program
- From: Pengfei Yuan <0xcoolypf at gmail dot com>
- To: "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>
- Date: Tue, 2 Jun 2015 11:08:36 +0800
- Subject: Data race in PGO profile collection for multi-process program
- Authentication-results: sourceware.org; auth=none
Hi,
I am trying PGO on Nginx, which has a main process and several worker processes.
I find that the collected profile data files only contain information
for the main process, which is probably a data race (the main process
exits immediately after worker processes exit).
How can I solve this problem? Should I switch to the sampling-based AutoFDO?
Regards,
Yuan, Pengfei