Date: Fri, 25 Oct 2013 10:23:43 +0300 From: Vitalij Satanivskij <satan@ukr.net> To: Andriy Gapon <avg@FreeBSD.org> Cc: Vitalij Satanivskij <satan@ukr.net>, freebsd-hackers@FreeBSD.org Subject: Re: FreeBSD 10.0-BETA1 #8 r256765M spend too much time in locks Message-ID: <20131025072343.GA31310@hell.ukr.net> In-Reply-To: <526A11B2.6090008@FreeBSD.org> References: <20131024074826.GA50853@hell.ukr.net> <20131024075023.GA52443@hell.ukr.net> <20131024115519.GA72359@hell.ukr.net> <20131024165218.GA82686@hell.ukr.net> <526A11B2.6090008@FreeBSD.org>
next in thread | previous in thread | raw e-mail | index | archive | help
http://quad.org.ua/profiling.tgz results of both methods but for pmcstat to few buffers configured by default so not all statistics in summary ^( Andriy Gapon wrote: AG> AG> When that high load happens again could you please run some profiling tool that AG> is capable of capturing the whole stacks of hot code paths? AG> AG> I can suggest two alternatives: AG> AG> 1. hwpmc AG> pmcstat -S instructions -O sample.out AG> pmcstat -R sample.out -G summary.out AG> AG> 2. The following DTrace script: AG> AG> profile:::profile-1113 AG> /!(curthread->td_flags & 0x20)/ AG> { AG> AG> @stacks[stack()] = count(); AG> } AG> AG> END AG> { AG> trunc(@stacks, 10); AG> printa(@stacks); AG> } AG> -- AG> Andriy Gapon AG> _______________________________________________ AG> freebsd-hackers@freebsd.org mailing list AG> http://lists.freebsd.org/mailman/listinfo/freebsd-hackers AG> To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20131025072343.GA31310>