Stelian Pop wrote: > Le vendredi 12 octobre 2007 à 23:58 +0200, Philippe Gerum a écrit : >> On Fri, 2007-10-12 at 23:51 +0200, Stelian Pop wrote: >>> On Fri, Oct 12, 2007 at 10:22:45PM +0200, Stelian Pop wrote: >>> >>>> Or even go crazy and activate SMP again ? >>> Would have been too easy: >>> >>> # modprobe xeno_native >>> Xenomai: native skin init failed, code -19. >>> >> The I-pipe likely told Xenomai that the LAPIC was unusable, because it >> has been put in dummy state by the clock event layer. Must be something >> silly going on at I-pipe level. Please switch HPET off just for kicks. > > No, it doesn't change a thing. > > What does change something however is CONFIG_X86_UP_IOAPIC. Without it > (UP or UP+APIC), latency works (albeit with higher latencies - up to 30 > us - than with 2.6.20+xeno-2.3.4 - where I saw latencies up to 20-25
Those 5 us are likely due to the programming overhead of the PIT (in contrast to the fast IO-APIC in LAPIC/SMP setups). > _in_SMP_mode_). With IOAPIC I get code 19. > Where do you get ENODEV? On nucleus startup? Please provide /proc/timer_list output of the working and non-working setups. Jan PS: For unknown reasons your mails don't make it to my web.de address, only to the list. Do you get any error messages? _______________________________________________ Xenomai-core mailing list [email protected] https://mail.gna.org/listinfo/xenomai-core
