From owner-freebsd-hackers Sat Apr 21 8:25:46 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from fw.wintelcom.net (ns1.wintelcom.net [209.1.153.20]) by hub.freebsd.org (Postfix) with ESMTP id 3005A37B423 for ; Sat, 21 Apr 2001 08:25:44 -0700 (PDT) (envelope-from bright@fw.wintelcom.net) Received: (from bright@localhost) by fw.wintelcom.net (8.10.0/8.10.0) id f3LFPh822971; Sat, 21 Apr 2001 08:25:43 -0700 (PDT) Date: Sat, 21 Apr 2001 08:25:42 -0700 From: Alfred Perlstein To: Zach Brown Cc: Jef Poskanzer , hackers@FreeBSD.ORG Subject: Re: thttpd hack for sendfile and accept filters. Message-ID: <20010421082542.P1790@fw.wintelcom.net> References: <200104201611.JAA95537@bomb.acme.com> <20010420093349.X1790@fw.wintelcom.net> <20010421094738.B7494@erasmus.off.net> <20010421074811.O1790@fw.wintelcom.net> <20010421110308.C8818@erasmus.off.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <20010421110308.C8818@erasmus.off.net>; from zab@zabbo.net on Sat, Apr 21, 2001 at 11:03:08AM -0400 X-all-your-base: are belong to us. Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG * Zach Brown [010421 08:03] wrote: > > > or so the numbers have lead me to beleive. Its still an annoying > > > design, but has someone come up with real numbers to show that accept() > > > hurding is a problem for waiters that do real work after accept() ? > > > > Accept herding isn't a problem under FreeBSD because the kernel doesn't > > allow it to happen. > > yes, as was previously mentioned. linux has also had "exclusive" wait > queues for quite some time, but thats not the point either :) Linux has had them for under a year. In fact that was a major presentation at the last USENIX. > I wasn't asking how the problem was handled in the kernel, but > whether people have ever found profiles of meaningful workloads the show > it being a problem. sorry if that wasn't clear. I don't understand what you're asking. If it's handled in the kernel then it can't be a problem. -- -Alfred Perlstein - [alfred@freebsd.org] Represent yourself, show up at BABUG http://www.babug.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message