On Wed, 15 Sep 2010, Agustin Ferrin Pozuelo wrote: > On 27/08/10 11:35, Thomas Gleixner wrote: > > On Mon, 23 Aug 2010, Agustin Ferrin Pozuelo wrote: > Sorry, my test setup is not very comprehensive at the moment. I have some > overnight/overweekend results at hand with millions of loops: > > PREEMPT-DESKTOP: > root@at91sam9263cpc:~# time cyclictest -i 70000 -p 80 -h 700 -r Oh, you are running cyclictest with a signal based timer and relative time. Any reason for this ? What happens if you change the command line to cyclictest -i 70000 -p 80 -n > I am assuming context switching is more expensive on PREEMPT-RT under ARM9, > where it seems already a bit expensive. No, the context switch is equally expensive, but signal delivery might be a bit more overhead on -RT Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
