Hi, On Wed, Mar 24, 2010 at 2:37 PM, Pradyumna Sampath <pradysam@xxxxxxxxx> wrote: > John, mq_timedrecieve takes abstime. Isnt it supposed to be > CLOCK_REALTIME ? Anyway, I tried with MONOTONIC .. mq_timedrecieve > doesnt block on that. > > I was just looking at some code in the kernel. linux/ipc/mqueue.c > +442. This line says: > > time = schedule_timeout(timeout); > > Maybe this is why produces a timeout that is inaccurate. Shouldnt it > be schedule_hrtimeout ? Ok, I just moved the HZ value from 250 to 1000 and the accuracy has improved significantly from 5-7 to 1-2 miliseconds. But IMHO, we should still change schedule_timeout to schedule_hrtimeout for better accuracy on the timeout because in many cases 1-2 miliseconds is just not good enough. I will try to push out a patch for this later today. regards /prady -- http://www.prady.in -- 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
