Date: Tue, 24 Apr 2001 09:33:40 -0700 From: "Alan Tegel" <alan.tegel@openwave.com> To: "Alfred Perlstein" <bright@wintelcom.net> Cc: <hackers@FreeBSD.ORG> Subject: RE: Question about Posix Threads Message-ID: <MAEIIMNAFOBDOMCEDBGGOEGEFDAA.alan.tegel@openwave.com> In-Reply-To: <20010424092346.M1790@fw.wintelcom.net>
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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 <alan.tegel@openwave.com> [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
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