> Hi, > > anyone has experience / knows of bugs (not the ASPM one) causing > high (at least 70 ms) latency on Intel 82574L using the e1000e driver? > > We have an instance of a connected device needing to be serviced > each 100 ms reporting a timeout while our internal measurements > show that the packets were given to the kernel max 30 ms apart. > > These are raw packets, there is no other traffic on that interface, > no kernel messages, no errors in the /sys/class/net/eth1/statistics/* > and it happened after 5 days of uptime :/ > > I am using kernel 3.4 with RT PREEMPT - I note that the driver version > there is 1.9.5 while in 3.9 it is 2.2.14. Anyone knows if the network > drivers are back-portable without much hassle that far > or whether this is a complicated task? > > e1000-devel: please Cc: me when replying, I am not subscribed > to the list. > > Thanks If you are having several processes/threads with different priorities sending on same eth, combined with high cpu load on RT processes, than it sounds a lot like a problem I had: Check http://article.gmane.org/gmane.linux.rt.user/10163 for details -- Nebojša -- 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
