Date: Mon, 15 Dec 2003 15:43:32 -0500 (EST) From: John Baldwin <jhb@FreeBSD.org> To: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz> Cc: freebsd-smp@freebsd.org Subject: RE: Hyperthreading crashes Message-ID: <XFMail.20031215154332.jhb@FreeBSD.org> In-Reply-To: <Pine.LNX.4.58.0312132022340.8994@artax.karlin.mff.cuni.cz>
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On 13-Dec-2003 Mikulas Patocka wrote: > Hi > > I use FreeBSD-4.9-RC1 on a machine with hyperthreading (it seems that > hyperthreading support was ripped out of final 4.9 release --- why?) It wasn't ripped out. It is now enabled by default. Check /usr/src/UPDATING and the release notes. > I get random SIGBUSes when compiling (once I got SIGSEGV too). When I > compile only with make -j 1, I get no errors. Is it known problem with > FreeBSD? Or does it mean that the machine is bad? > > How can I find what's the reason for particular SIGBUS signal --- what did > the program wrong? In reply to your later post: I'm not sure why you are getting alignment traps, except perhaps that the PSL_AC flag is somehow flipped on on the second processor. Make sure you enable HT in your BIOS if you haven't already. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/
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