On Mon, Sep 20, 2010 at 3:29 PM, Mike Frysinger <[email protected]> wrote: > On Mon, Sep 20, 2010 at 03:26, <[email protected]> wrote: >> Revision 9153 Author lliubbo Date 2010-09-20 03:26:56 -0400 (Mon, 20 Sep >> 2010) >> >> Log Message >> >> [#6210]bfin_latencytest: add a simple driver for preempt latency test >> >> bsong have added preempt to our kernel in commit 9079, add a simple driver >> in order to test it. >> >> This driver use TIMER2 to generate interrupt every seconds,the timer isr >> handle will record the time and send SIGIO to userapp preempt_test which >> will >> read the recorded time when scheduled and compare with the actual time to >> calculate the latency. > > we already have uclinux-dist/user/blkfin-test/latency-test/
I see. but the latency-test is test the time when interrupt happenned to interrupt handler executed. preempt-test is test the time when a process waked up to the process actually executed. There are different. And preempt-test must need kernel's support. > > since this really doesnt have a chance of being merged upstream, you > should merge your driver with the existing uclinux-dist one and remove > it from the linux-kernel. It hard to find a driver to merge, the best one is bfin_simple_timer. but it still needs lots of marco define to change bfin_simple_timer's original behavior. Thanks -- Regards, --Bob _______________________________________________ Linux-kernel-commits mailing list [email protected] https://blackfin.uclinux.org/mailman/listinfo/linux-kernel-commits
