Date: Wed, 24 Mar 2021 13:58:52 +0100 From: Mathieu Chouquet-Stringer <me+freebsd@mathieu.digital> To: Martin Simmons <martin@lispworks.com> Cc: freebsd-fs@freebsd.org Subject: Re: Scrub incredibly slow with 13.0-RC3 (as well as RC1 & 2) Message-ID: <YFs3jFT7sEaGeQCe@weirdfishes> In-Reply-To: <202103241230.12OCUqur030001@higson.cam.lispworks.com> References: <YFhuxr0qRzchA7x8@weirdfishes> <202103221515.12MFFHRK015188@higson.cam.lispworks.com> <YFi6Lwh3ISn8UMvS@weirdfishes> <YFk11A/j7URClN/l@weirdfishes> <YFm3BTK/J9XY/mCN@weirdfishes> <202103241230.12OCUqur030001@higson.cam.lispworks.com>
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On Wed, Mar 24, 2021 at 12:30:52PM +0000, Martin Simmons wrote: > FWIW, I think the new scrub algorithm was added in 2018. You're right, git says Wed Nov 15 20:27:01 2017 -0500 > You could try to profile it: > > https://wiki.freebsd.org/DTrace/Tutorial#Lesson_9._Profile_On-CPU_Kernel_Stacks dtrace, hello old friend... :-) That's the next step... -- Mathieu Chouquet-Stringer The sun itself sees not till heaven clears. -- William Shakespeare --
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