Date: Wed, 06 Mar 2019 14:58:42 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 236233] Python multiprocessing is 4x slower with 11.2 compared to 11.0 kernel Message-ID: <bug-236233-227-HgnhDwssCz@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-236233-227@https.bugs.freebsd.org/bugzilla/> References: <bug-236233-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D236233 --- Comment #6 from Alex Richardson <arichardson@FreeBSD.org> --- For now setting vm.pmap.pti=3D0 in /boot/loader.conf brings the testing tim= e back down to 25.89s. Meltdown mitigation should not be too important for this se= rver so I will disable it for now. I guess switching to separate page tables causes a lot of overhead with nes= ted paging and maybe due to the timing changes there are more syscalls so again more overhead. --=20 You are receiving this mail because: You are the assignee for the bug.=
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