Date: Tue, 07 May 2024 19:29:26 +0000 From: bugzilla-noreply@freebsd.org To: threads@FreeBSD.org Subject: [Bug 278703] Forking on 13.3 restricting to same CPU core Message-ID: <bug-278703-13406-tM2VPU3rls@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-278703-13406@https.bugs.freebsd.org/bugzilla/> References: <bug-278703-13406@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D278703 --- Comment #6 from cbl@cbl.us --- Looks like I have some traction on this LLVM bug, and it should have a PR s= oon. https://github.com/llvm/llvm-project/issues/91098 It's a bug in the atfork() handler on Unix systems + logic in reinitializing the child process. The current library incorrectly sets the child process' affinity to compact, which roughly translates to "pin consecutive threads = to consecutive cores", even when the user hasn't set KMP_AFFINITY to anything.= So every child process was pinned to the first core instead of the entire syst= em. Curious how hard it'd be to get the PR fix into 13.x and/or 14.x. Thanks. --=20 You are receiving this mail because: You are the assignee for the bug.=
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