From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 8B8843858C62; Thu, 1 Feb 2024 05:00:39 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 8B8843858C62 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1706763639; bh=bxTg6O0QyV5N38/p0nibR1oW/0CbS68wod66HTSFA34=; h=From:To:Subject:Date:In-Reply-To:References:From; b=sfaLt5er64qpqTLTIoJOMn73QP4411awTHHODo8kA18v83CXabJ0Z9iyNf5npfZwY 8ZZ5xaqhZ0jPpEhh4DZu0TYakeHrqXZR30YxdIhfqdNUwEcG51B+jUKJ/1KV+UzOS9 be0P2R1ik4JBkiRI1Ulg9uukfP5vRqrLOLikmZFY= From: "pinskia at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug libgomp/113698] GNU OpenMP with OMP_PROC_BIND alters thread affinity in a way that negatively affects performance Date: Thu, 01 Feb 2024 05:00:39 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: libgomp X-Bugzilla-Version: 14.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: pinskia at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113698 --- Comment #2 from Andrew Pinski --- Actually I misread the testcase, because it looks like LLVM's libomp follows the same as GCC's. And it looks like the OpenMP spec is specific about that behavior too.=