From owner-freebsd-hackers Tue Oct 16 11:33:30 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from noos.fr (r178m112.cybercable.tm.fr [195.132.178.112]) by hub.freebsd.org (Postfix) with ESMTP id C9B0637B401 for ; Tue, 16 Oct 2001 11:33:26 -0700 (PDT) Received: (from mux@localhost) by noos.fr (8.11.6/8.11.4) id f9GIWHK01278; Tue, 16 Oct 2001 20:32:17 +0200 (CEST) (envelope-from mux) Date: Tue, 16 Oct 2001 20:32:12 +0200 From: Maxime Henrion To: Matthew Dillon Cc: freebsd-hackers@freebsd.org Subject: Re: cvs commit: src/sys/vm vnode_pager.c Message-ID: <20011016203212.D447@nebula.cybercable.fr> References: <20011016172843.A469@nebula.cybercable.fr> <200110161618.f9GGIpM31430@apollo.backplane.com> <20011016190340.A465@nebula.cybercable.fr> <200110161712.f9GHCbg33501@apollo.backplane.com> <20011016194937.A447@nebula.cybercable.fr> <200110161757.f9GHv5633749@apollo.backplane.com> <20011016200300.B447@nebula.cybercable.fr> <200110161804.f9GI4wF33862@apollo.backplane.com> <20011016201014.C447@nebula.cybercable.fr> <200110161824.f9GIOjT33989@apollo.backplane.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200110161824.f9GIOjT33989@apollo.backplane.com> User-Agent: Mutt/1.3.23i Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Matthew Dillon wrote: > Well, 11% over a period of a single second, once every 30 seconds > makes sense if there are a lot of vnodes cached. I think you are > seeing the same issue, just that on -stable there is much lower > overhead. > > Basically we have two routines that are causing problems: > > ffs_sync() > qsync() (quota sync) [explanation ripped] Perhaps my problem is because of something else ; I recompiled a kernel with a different syncdelay in vfs_subr.c, 42s (sorry ;) instead of 30s. I also bumped SYNCER_MAXDELAY accordingly. But, the problem was still happening every 30s. Maxime -- Don't be fooled by cheap finnish imitations ; BSD is the One True Code To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message