Hi. Thomas E. Spanjaard wrote: > While trying to build math/atlas on a FreeBSD/amd64 9.0-CURRENT r212411, > the kernel hangs at some point when math/atlas tries to run some tests > (presumably the ones to profile the code and optimise). The kernel > spouts messages about Starting event timers: LAPIC _at_ 1000Hz, HPET _at_ > 127Hz; then LAPIC _at_ 1000Hz, HPET _at_ 8128Hz (iirc), back, then back again. > After that, the system is no longer responsive, and eventually panic()s > because some spinlock has been held too long in the pmap TLB invalidate > code. Couldn't get a dump, because I had no dumpdev configured. > > Anyone else see this problem? I'm trying to reproduce it by building > other ports (it has survived gcc44, gcc45, llvm and clang so far), but > only math/atlas seems to trigger it. It is reported deadlock between event timers and some IPI senders, like TLB invalidation, during switching to/from profiling clock rate. In forthcoming version of event timer patch this problem should not happen. You can get latest version of the patch here: http://people.freebsd.org/~mav/timers_oneshot13.patch -- Alexander MotinReceived on Fri Sep 10 2010 - 13:31:23 UTC
This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:40:07 UTC