From owner-freebsd-hackers Tue Apr 24 9:33:48 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from oe-mp1.bizmailsrvcs.net (oe-mp1pub.managedmail.com [206.46.164.22]) by hub.freebsd.org (Postfix) with ESMTP id B5BCF37B422 for ; Tue, 24 Apr 2001 09:33:41 -0700 (PDT) (envelope-from alan.tegel@openwave.com) Received: from oe-ismta1.bizmailsrvcs.net ([206.46.164.26]) by oe-mp1.bizmailsrvcs.net (InterMail vM.5.01.02.00 201-253-122-103-101-20001108) with ESMTP id <20010424163311.WYS6169.oe-mp1.bizmailsrvcs.net@oe-ismta1.bizmailsrvcs.net>; Tue, 24 Apr 2001 11:33:11 -0500 Received: from tegela ([198.78.34.30]) by oe-ismta1.bizmailsrvcs.net (InterMail vM.5.01.02.00 201-253-122-103-101-20001108) with SMTP id <20010424163339.HQFQ6281.oe-ismta1.bizmailsrvcs.net@tegela>; Tue, 24 Apr 2001 11:33:39 -0500 From: "Alan Tegel" To: "Alfred Perlstein" Cc: Subject: RE: Question about Posix Threads Date: Tue, 24 Apr 2001 09:33:40 -0700 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 In-Reply-To: <20010424092346.M1790@fw.wintelcom.net> Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG How we got to this question: ---------------------------- We have been using 5 Compaq 8500's running NT 4.0 using Loadrunner (Mercury Interactive) to test the load. The Linux box was barely able to hold the load, but it's support tool sar, (vm|mp)stat left a fellow engineer to be disgusted. So, I recompiled Apache on Solaris 8 on a 420R and he didn't have a problem. Since we have 4 Compaq 5500's available, we were looking at alternatives to what was initially installed. Test load of 1200/1500 http connections/sec Other engineers in the group started to ask question about how well FreeBSD handled Posix threads and what the limitations were. Since I opened my mouth, I said I would ask a few questions. And being a FreeBSD fan, I decided to push you guys.... The other alternatives were Linux and Solaris x86.... +-ADT -----Original Message----- From: Alfred Perlstein [mailto:bright@wintelcom.net] Sent: Tuesday, April 24, 2001 9:24 AM To: Alan Tegel Cc: hackers@FreeBSD.ORG Subject: Re: Question about Posix Threads * Alan Tegel [010424 07:29] wrote: > How well does FreeBSD 4.3 do with Posix Threads? > > This is a question I posted to a news group. > > Hello. I work for a unix performance and capacity group. owever, we have > had some dismal performance from RedHat 6.2. The question that I would > like to know is how well does FreeBSD support Posix threads and is there > any caveats in perfromance and stability? Note, we have the ability to > push Unix (whatever version) to the extremes (very fun and very insane > job).... > > Any comments would be helpful. How is performance dismal under redhat? FreeBSD should do a really good job of running thousands of threads as long as you don't have too much disk IO since all the threads are multiplexed into a single process, if you have an IO intensive program FreeBSD threads will probably not help you all that much. There are plans on replacing the FreeBSD threads library with a multiplexed userland<->kernel scheme in the near future. -- -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