Hello, I have been working on trying to find the optimal linux kernel configuration and have noticed a couple problems. No matter what I do it seems that while cpu #2 is detected, nothing gets scheduled on it. Also, there is always a modprobe process running at 100%cpu that I can't kill. The command that is showed in top is "modprobe -s ac". If I run it from the command line it hangs as well. Latencies are however very acceptable when running xeno-test. I do however see some negative values in the test output.
The config file that I am using currently is the same as the one below just with CONFIG_XENO_HW_SMI_ALL. This seems to give me the best latencies. Mike -------------- Original message ---------------------- From: Gilles Chanteperdrix <[EMAIL PROTECTED]> > [EMAIL PROTECTED] wrote: > > -------------- Original message ---------------------- > > From: Gilles Chanteperdrix <[EMAIL PROTECTED]> > > > >>[EMAIL PROTECTED] wrote: > >> > >>># > >>># SMI workaround > >>># > >>># CONFIG_XENO_HW_SMI_DETECT_DISABLE is not set > >>>CONFIG_XENO_HW_SMI_DETECT=y > >>>CONFIG_XENO_HW_SMI_WORKAROUND=y > >>># CONFIG_XENO_HW_SMI_ALL is not set > >>># CONFIG_XENO_HW_SMI_INTEL_USB2 is not set > >>># CONFIG_XENO_HW_SMI_LEGACY_USB2 is not set > >>># CONFIG_XENO_HW_SMI_PERIODIC is not set > >>># CONFIG_XENO_HW_SMI_TCO is not set > >>># CONFIG_XENO_HW_SMI_MC is not set > >>>CONFIG_XENO_HW_SMI_APMC=y > >>># CONFIG_XENO_HW_SMI_LEGACY_USB is not set > >>>CONFIG_XENO_HW_SMI_BIOS=y > >> > >>Chances are that the latencies you get are due to the SMI you leave > >>enabled (APMC or BIOS). Could you try first with only > >>CONFIG_XENO_HW_SMI_ALL ? > >> > > WOW!!! I did try that with the 2.6.17 kernel but it wouldnt boot, > > I had to enable APM. It is working like charm now. Max latency > > is 4-5 us while running X. If I drag a window around it goes up > > to 7us or so. Deffinately a step in the righ direction! Thanks. > > Good news. > > -- > Gilles Chanteperdrix _______________________________________________ Xenomai-help mailing list [email protected] https://mail.gna.org/listinfo/xenomai-help
