Date: Sun, 08 Apr 2001 12:13:59 +0400 From: alex <jadream@chat.ru> To: freebsd-questions@freebsd.org Subject: Strange behaviour of the SYSV msg queue Message-ID: <3AD01DC7.E2BFA324@chat.ru>
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Hi ppl ! I have FreeBSD 4.2 on a common i386 pc with SysV IPC configured and recompiled kernel. Everything goes well untill I create more than 128 processes sending messages (24bytes in size) to the same queue at a time with flags = 0 (Blocking mode) and 1 process getting them all with flags = 0 (Blocking mode too). After queue size rises up to 70 -180 all processes hangs - both the ones that sends (what's naturally) and the one that gets (that's strange to my mind). Hence I have dead lock. With all this I have in my kernel config file options like that MSGMNI=64 MSGMAX=256 MSGMNB=2048*24 MSGTQL=2048 I used semaphores to block sending messages processes until receiver cleares whole queue and it all works but total performance go down dramatically :0( Any idea how to handle that? Alexander Komratov To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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