Date: Thu, 22 May 2003 12:43:34 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: Julian Elischer <julian@elischer.org> Cc: Daniel Eischen <eischen@pcnet1.pcnet.com> Subject: Re: libkse and SMP (was Re: USB bulk read & pthreads) Message-ID: <20030522174334.GC1694@dan.emsphone.com> In-Reply-To: <Pine.BSF.4.21.0305221016260.82473-100000@InterJet.elischer.org> References: <20030522165229.GA1694@dan.emsphone.com> <Pine.BSF.4.21.0305221016260.82473-100000@InterJet.elischer.org>
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In the last episode (May 22), Julian Elischer said: > On Thu, 22 May 2003, Dan Nelson wrote: > > 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'. > > 1/ does teh whole system lock up? > 2/ is this SMP? (how many cpus)? > 3/ does the system respond to pings? > 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. > 5/ if it DOES go into ddb, what does 'ps' show? > 6/ got a serial console? Yes, the entire system locks. 2-CPU system. No ping responses. CTRL-ALT-ESC doesn't do anything, and neither does <cr> ~ ^B from the serial console. No X. I don't have BREAK_TO_DEBUGGER enabled because my console is connected to a Windows machine and I don't want my Unix box to hang every time I reboot it :) Do you think a real BREAK might work where <cr> ~ ^B doesn't? -- Dan Nelson dnelson@allantgroup.com
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