Date: Thu, 22 May 2003 15:21:29 -0400 (EDT) From: Daniel Eischen <eischen@pcnet1.pcnet.com> To: Julian Elischer <julian@elischer.org> Cc: Dan Nelson <dnelson@allantgroup.com> Subject: Re: libkse and SMP (was Re: USB bulk read & pthreads) Message-ID: <Pine.GSO.4.10.10305221517340.277-100000@pcnet1.pcnet.com> In-Reply-To: <Pine.BSF.4.21.0305221016260.82473-100000@InterJet.elischer.org>
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On Thu, 22 May 2003, Julian Elischer wrote: > > On Thu, 22 May 2003, Dan Nelson wrote: > > > In the last episode (May 22), Terry Lambert said: > > > Make sure you use SCHED_4BSD, rather than SCHED_ULE, if you are using > > > one of the kernel threads libraries, for now. > > > > > > You really should read the -current archives before attempting any of > > > this, if you don't follow -current closely enough to have caught > > > Jeff's message on this, or which kernel threading libraries are > > > available. > > > > I do read -current, and I'm definitely not going anywhere near > > SCHED_ULE. I just tested both libraries with today's kernel and > > libraries, and was able to get a hard lockup with both libthr and > > libkse. Mysql seems to run okay. Starting a threaded pike process > > seems to be the killer. Unfortunately, pike's a pretty large app so > > it's not easy to get a stripped-down testcase. > > Ok so we need to get a description of this 'lockup'. In my experience with the ACE test MT_SOCK_Test: > 1/ does teh whole system lock up? Yes. > 2/ is this SMP? (how many cpus)? No. > 3/ does the system respond to pings? No. > 4/ do you have teh kernel dbugger installed, and if you do, does it > respond on the console to <CTL><ALT><ESC>. You may have to start you > app from outside X11 on a console to be able to see the console once it > has frozen if it si an X app. Haven't been able to do this. > 5/ if it DOES go into ddb, what does 'ps' show? > 6/ got a serial console? No :( You can repeat it by downloading and building the ACE tests. David and I can tell you how. It doesn't happen all the time, so it is not easily repeatable. Though, it's only been the last few weeks that I've had the problem. -- Dan Eischen
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