Date: Wed, 26 Aug 1998 00:08:50 +0900 (JST) From: Michael Hancock <michaelh@cet.co.jp> To: Gary Palmer <gpalmer@FreeBSD.ORG> Cc: Chuck Robey <chuckr@glue.umd.edu>, freebsd-current@FreeBSD.ORG Subject: Re: Threads across processors Message-ID: <Pine.SV4.3.95.980826000204.19157C-100000@parkplace.cet.co.jp> In-Reply-To: <3686.904031598@gjp.erols.com>
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On Tue, 25 Aug 1998, Gary Palmer wrote: > Heck, SMI wrote `doors' for the very reason that IPC *blows* in all cases, and > that to pull off the speedups with NSCD that they wanted, they had to get the > IPC overhead reduced a lot. I think I even have slides somewhere comparing > pipes, SYSV SHM, etc times for message passing in terms of transit time. Our pipes are very fast. SYSV SHM's blunder is that it uses full blown system calls for synchronization. > So, I think you are missing a lot of real-time applications too. Yes, the realtime guys will always be biased toward 1-to-1 over anything else not because of performance but because of more predictable scheduling. Regards, Mike Hancock To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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