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Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!think!harvard!uwvax!caip!cbm!hutch!barber
From: barber@hutch.UUCP (Steve Barber)
Newsgroups: net.unix
Subject: SYSV IPC problems
Message-ID: <127@hutch.UUCP>
Date: Wed, 15-Jan-86 16:13:13 EST
Article-I.D.: hutch.127
Posted: Wed Jan 15 16:13:13 1986
Date-Received: Fri, 17-Jan-86 06:23:53 EST
Distribution: net
Organization: Rabbit Software Corp., Malvern PA
Lines: 15

We have an application here that relies heavily on SYSV semaphores and
message queues for IPC.  The problem is that under heavy system loads
(lots of swapping), either a message queue loses a message or a semaphore
doesn't get decremented when it should.  Does anyone know of any
bugs in the IPC code relating to this, or perhaps related to being
knocked off a pending semaphore call by a signal?  We are running
Sys V Rel 2 Version 2, if that's any help.  Please reply
directly to me at ...!ihnp4!cbm!hutch!barber, and I will summarize
to the net.  Thanks in advance.

-- 
-------------------------------------------------------------
Steve Barber    Rabbit Software Corp.
...!ihnp4!{cbm,cuuxb}!hutch  ...!psuvax1!burdvax!hutch
(215) 647-0440  1 Great Valley Parkway East  Malvern PA 19355