Hi, On Thu, Mar 31, 2011 at 9:51 AM, Arnaud Lacombe <lacom...@gmail.com> wrote: > Hi > > [let's start a new thread :)] > > On Wed, Mar 30, 2011 at 2:22 PM, Jack Vogel <jfvo...@gmail.com> wrote: >> Read the code in HEAD, em_local_timer() has a test of ALL the rx queues and >> will schedule a task that refreshes mbufs if they are empty. This has >> exactly the >> same effect as checking for some interrupt cause, a cause that is not >> available >> when using MSIX on 82574, but this approach works for everything. >> > ok, it took me a long time to reproduce the issue with em(4) version > 7.1.9, about 3h rather than a few minutes a month ago and only got > ~875 allocations failure vs. several thousand before, here are some > stats: > > # sysctl -a | grep missed > dev.em.0.mac_stats.missed_packets: 1917112 > dev.em.1.mac_stats.missed_packets: 0 > dev.em.2.mac_stats.missed_packets: 0 > dev.em.3.mac_stats.missed_packets: 0 > dev.em.4.mac_stats.missed_packets: 0 > dev.em.5.mac_stats.missed_packets: 0 > For the record, we had this issue at a customer today; the system was still using the driver from 7-STABLE. Fortunately, it should just be a matter of upgrading to the driver from HEAD, which we already know to be good, to fix the issue.
Regards, - Arnaud _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
