On Sat, 2007-02-24 at 16:55 +0000, Paul wrote: > On Saturday 24 February 2007 15:56, Philippe Gerum wrote: > > > Initial results look promising with the latency test reporting figures > > > in the 0.5 to 4 uSec range under light load. A kernel compile bumps the > > > wost up to 9-14uSec. > > > > Not bad. Is this a UP or SMP config, and which kind of box did run the > > tests precisely? > > AMD X2 4600+ with SMP config - MoBo is an Asus A8V with a Via K8T800Pro > chipset and a measly 512M of RAM. >
Ok. > > > Firing up X,KDE, and a gamut of desktop apps really kills the > > > numbers though - ~267uSec being the worst recorded so far, > > > > Ok, the latter looks clearly pathological. The trace should tell us > > more. > > The latency log ? Rather the CONFIG_IPIPE_TRACE feature, with the IRQs off tracking option set, but the latency log already has some value, thanks. > Attached is some three hours worth of log - Should point out there are no > proprietory video drivers being used, just the regular Xorg stuff and what > ever the kernel provides. > Looking at this log, the good news is that latency peaks are not spread all over the place, but only a few of them are bugging us. This tend to confirm a bad interference exists with something specific to the X startup procedure (maybe/likely? related to the graphic card). Does the peak still occur if you disable hw acceleration for the graphic card in your XF86Config file? > > Regards, Paul. > -- Philippe. _______________________________________________ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
