From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 9478D3858C39; Fri, 9 Feb 2024 20:31:46 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 9478D3858C39 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1707510706; bh=6ukRVIzppxaJWMdm6OZSQoqDRdHilG4QU7tZA6i33oQ=; h=From:To:Subject:Date:In-Reply-To:References:From; b=xRhTzeGknlix10i7hjpMzVH7m8EeYj8FYD4SB83JAOEhZSySdvn5JAWCJ6Bkq7Rd4 ksm0FDjfjLEYEHdDfGvaNhqXdTxuABExhrnJPQ1YntcKFCK8MKDsyFjLAg4BGFAxJ+ P3Vp4RvWUlQfUxQIp5mEWde6aHGs8gP/1PnP1G+4= From: "kugan 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: Fri, 09 Feb 2024 20:31:46 +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: missed-optimization, openmp X-Bugzilla-Severity: normal X-Bugzilla-Who: kugan 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 #4 from kugan at gcc dot gnu.org --- Thanks for looking into this. The main reason we ere seeing performance iss= ue turned out to be due to glibc malloc issue in https://sourceware.org/bugzilla/show_bug.cgi?id=3D30945=