Am Montag, 25. September 2006 17:57 schrieb Philippe Gerum: > On Sun, 2006-09-24 at 23:07 +0200, Wolfgang Grandegger wrote: > > Niklaus Giger wrote: <..> > Ok, we can go for the lazy fix here, since this code is poised to > disappear anyway. I've merged a variant of the above we already use for > the ARM port, which scales down the period to microseconds instead of > losing precision on the count of timebase ticks per jiffy. > > - ticks = ns * tb_ticks_per_jiffy / (1000000000 / HZ); > + ticks = (ns / 1000) * tb_ticks_per_jiffy / (1000000 / HZ); Thanks for finding this solution. I tried to understand mulhwu and mulhwu_scale_factor but couldn't figure out a correct solution in a short time.
The buildbot cannot presently power on and off my PPC405 target board, as the my power outlet switching device is broken and has been sent back for a remplacement. I did however run some tests manually and have the following questions about the output: Why do I get negative values for latenciy values? Is the output of lines like "Xenomai: Switching display-3238 to secondary mode after exception #1025 from user-space at 0x100033c4 (pid 3240)" harmless or the result of a activated CONFIG_XENO_OPT_DEBUG<..> option? Mon Sep 25 20:20:33 UTC 2006 running: ./run -- -T 5 -t2 # latency * * * Type ^C to stop this application. * Xenomai: Switching display-3238 to secondary mode after exception #1025 from user-space at 0x100033c4 (pid 3240) == Sampling period: 100 us == Test mode: in-kernel timer handler == All results in microseconds warming up... RTT| 00:00:01 (in-kernel timer handler, 100 us period, priority 99) RTH|-----lat min|-----lat avg|-----lat max|-overrun|----lat best|---lat worst RTD| -5.108| -4.754| -0.905| 0| -5.108| -0.905 RTD| -4.963| -4.871| 1.155| 0| -5.108| 1.155 Xenomai: Switching display-3238 to secondary mode after exception #1025 from user-space at 0xfda9638 (pid 3240) RTD| -4.963| -4.758| 16.020| 0| -5.108| 16.020 RTD| -6.313| -4.861| 10.980| 0| -6.313| 16.020 Xenomai: Switching display-3238 to secondary mode after exception #1025 from user-space at 0xfe7c1c4 (pid 3240) ---|------------|------------|------------|--------|------------------------- RTS| -6.313| -4.811| 16.020| 0| 00:00:05/00:00:05 Xenomai: stopping RTDM services. Best regards -- Niklaus Giger _______________________________________________ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
