Re: RX overrun with 3COM 3c982
Donald Becker <[email protected]>
| Newsgroups | gmane.linux.drivers.vortex.devel |
|---|---|
| Message-ID | <[email protected]> |
On Wed, 13 Nov 2002, Claude Pignol wrote: > Donald Becker wrote: > >On Tue, 12 Nov 2002, Claude Pignol wrote: > >>I have loaded the new driver on all the nodes. > >>The performance using PVFS for example are correct but I still have some > >>overrun on the nodes > >>that have the more network load (io nodes) > >>Here are the stat for the io nodes: > >> > >>RX packets:4920572 errors:0 dropped:0 overruns:2040 frame:0 > >>TX packets:4444957 errors:0 dropped:0 overruns:0 carrier:0 > > > >What is the detection message? > 3c59x.c:v0.99X 6/21/2002 Donald Becker, [email protected] > http://www.scyld.com/network/vortex.html > eth0: 3Com 3c982 Server Tornado at 0x2400, 00:e0:81:22:b0:6a, IRQ 18 > 8K buffer 5:3 Rx:Tx split, autoselect/Autonegotiate interface. > MII transceiver found at address 24, status 782d. > Using bus-master transmits and whole-frame receives. OK, there is nothing unusual in the configuration. Is this a single or dual NIC system? (The '982 ID is often used on dual NIC systems). > >What does /proc/net/dev report? > > > face |bytes packets errs drop fifo frame... > > eth0:79819430 5177203 0 0 2040 0 OK, this is the useful output. The only source for FIFO errors with this speicific chip is the errors reported in Window 6 offset 5. These errors can occur either because The chip ran out of PCI bandwidth The driver ran out of receive buffers, causing the PCI Rx transfers (the "upload engine") to stall. Are you running another high-bandwidth PCI device on the system? Video cards are the usual offenders. Have you tried increasing the kernels free memory? 2.2 kernels echo 500 1000 2000 > /proc/sys/vm/freepages and 2.4 kernels echo "100 500 200" > /proc/sys/vm/bdflush -- Donald Becker [email protected] Scyld Computing Corporation http://www.scyld.com 410 Severn Ave. Suite 210 Scyld Beowulf cluster system Annapolis MD 21403 410-990-9993 _______________________________________________ vortex mailing list [email protected] http://www.scyld.com/mailman/listinfo/vortex