Date: Thu, 18 Jul 2002 11:52:30 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: Jay West <jwest@classiccmp.org> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Repost: Why are IPC message queues incredibly slow? Message-ID: <20020718165230.GC41869@dan.emsphone.com> In-Reply-To: <01b501c22e72$acb7a0a0$9701a8c0@HPLAPTOP> References: <01b501c22e72$acb7a0a0$9701a8c0@HPLAPTOP>
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In the last episode (Jul 18), Jay West said: > I posted this here a week ago, but got no responses. Is there a better list > I should direct this type of question to, a developers list for freebsd or > something? Any thoughts appreciated! > ----- Original Message ----- > > I'm writing a rather major project under FreeBSD, and making fairly > > heavy use of message queues so that multiple processes can > > communicate. I am finding the response times for message delivery > > between two given processes to be pretty horrid, typically about 1 > > second per message set (send query from process A to process B, > > then process B sends a response back to process A and process A > > displays the response). You can try freebsd-hackers, but I don't think sysv queues are used very often at all. You say there's a 1-sec delay when sending a message? Have you ktrace'd both client and server and verified that msgsnd/msgrcv are really the cause of the delay? Can you reproduce the problem with a pair of minimal programs? -- Dan Nelson dnelson@allantgroup.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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