On 07/27/2016 10:03 AM, Uwe Kleine-König wrote: > On Tue, Jul 26, 2016 at 05:36:49PM +0300, Grygorii Strashko wrote: >> On 07/26/2016 03:02 PM, Uwe Kleine-König wrote: >>> Hello, >>> >>> these patches are based on next-20160726. I didn't check yet how latency >>> improves by using these patches, but even if the improvment is small, >>> it's still a good idea to have them. >> >> Sry, but how this will affect on -RT? This is not a raw locks, so >> they will be converted to rt-mutexes which are sleepable. >> Or I've missed smth? > > They are still locks after all. On -rt I saw for the relevant > application: > > send package | > take lock | > write pckt to hw | > | rcv irq > | take lock > | schedule > drop lock | > schedule | > | get pckt from hw > | drop lock > > So reducing the time a lock is taken reduces the chances that the lock > is contended for another thread which results in extra context switches. > Thanks a lot for explanation. So, this is not exactly rt-latency reduction, but it might improve net performance on -RT. correct? Thanks. -- regards, -grygorii -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
