On Fri, 2008-08-08 at 11:43 -0700, Matthew Carlson wrote: > Segher is right. The code should be 2.5 milliseconds but is actually > much longer. This fix is actually already in my patch queue and needs > to be sent upstream. >
Matt, I think we can optimize this a little more. The heart beat event is sent every second and the link event is sent whenever the link changes. the spin wait is only needed in rare cases when the link event is closer than 2.5 msec from the heart beat event. We can save the jiffies time stamp right after sending each event. Next time we need to send a heart beat or a link event, we check the jiffies with the stored time stamp. If they are less than 2.5 msec apart and we haven't received the ACK from the previous event yet, we just wait up to the remainder. It should be very rare that we have to wait. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
