All right. I'll re-use Philippe's patch that disables TSC on geode and compile the libs for use without TSC. However, this will not help my overhead problems, correct? Won't it make them worse?
If xenomai is using tsc, then that's a good thing. The timing is all correct it seems, and the jitter is low. Steven > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Sent: Monday, February 11, 2008 1:37 PM > To: Steven Seeger > Cc: [email protected] > Subject: Re: [Xenomai-help] irq0 > > Steven Seeger wrote: > > Jan, have patience my friend. I will be reporting bugs regarding LTT > > tonight. ;) I have a day job that unfortunately requires my expertise. > > You have many fires to fight, I understand. :) > > > I have local APIC disabled in the kernel because we don't seem to have > > one. I see context switches like these whether or not I use idle=poll, > > and thus the TSC. > > > > Here's my /proc/xenomai/timer: > > > > status=on+watchdog:setup=3:clock=40035659193:timerdev=pit:clockdev=tsc > > > > It seems that idle=poll didn't prevent the tsc from being marked as > > unstable despite what the mailing lists say. > > But Xenomai picks it independent of Linux' decision as its clockdev - so > their might be glitches between the time bases of pit and tsc. You > should try to build your kernel with CONFIG_M586. That will make Xenomai > pick the PIT for time keeping too. > > If TSC is truly broken on your box, you cannot gain anything with > keeping it for Xenomai. > > Jan _______________________________________________ Xenomai-help mailing list [email protected] https://mail.gna.org/listinfo/xenomai-help
