I'm going to go with the theory that the wake up function needs to wake up unallocated CPUs too.
Gabe Gabe Black wrote: > It looks like Alpha turns on all the CPUs to start with where x86 only > turns on the BP and brings up the APs with IPIs. I think SPARC is > actually more similar, but it looks like I'm already doing what it's > doing. I remember Ali fixed some of the SPARC SMP boot issues recently, > but I looking at that it doesn't seem to address this sort of thing. > > Gabe > > Steve Reinhardt wrote: > >> Recalling from some of the issues with getting O3 MT to work, I >> believe there's a general confusion and inconsistency with respect to >> the meanings of "suspended", "unallocated", and perhaps other states. >> It's possible (maybe even likely) that the code that does SE-mode MT >> apps like SPLASH has requirements that are inconsistent with FS mode. >> So there's no "right answer" short of figuring out how it ought to be >> and fixing the half of the code that assumes something different. >> >> Can you tell how it works in Alpha FS? Seems like x86 shouldn't be >> any different. >> >> Steve >> >> On Sat, Feb 28, 2009 at 12:48 PM, Gabe Black <gbl...@eecs.umich.edu> wrote: >> >> >>> I'm trying to bring up SMP under x86 FS, and I'm not able to wake up >>> any AP because the wakeup function gives up if the CPU isn't suspended. >>> The CPUs I'm working with are actually unallocated, so nothing happens. >>> I had startupCPU set up to suspend the APs as the came up, but that >>> causes a problem with the simple CPUs which insist the thread is >>> Running, and again it's Unallocated. How is this supposed to work? Do I >>> have to activate and then suspend a context? Or did somebody just leave >>> a possible option out of an assert someplace? >>> >>> Gabe >>> _______________________________________________ >>> m5-dev mailing list >>> m5-dev@m5sim.org >>> http://m5sim.org/mailman/listinfo/m5-dev >>> >>> >>> >> _______________________________________________ >> m5-dev mailing list >> m5-dev@m5sim.org >> http://m5sim.org/mailman/listinfo/m5-dev >> >> > > _______________________________________________ > m5-dev mailing list > m5-dev@m5sim.org > http://m5sim.org/mailman/listinfo/m5-dev > _______________________________________________ m5-dev mailing list m5-dev@m5sim.org http://m5sim.org/mailman/listinfo/m5-dev
