Ben Hutchings wrote:
On Mon, Mar 15, 2010 at 05:20:32PM +0000, stephen mulcahy wrote:
All pause frames should be dropped, either by the hardware or the driver.
So it's not unexpected that these are equal.
Ok, thanks for the clarification.
It might be interesting to see what happens if you disable pause frame
handling with this command:
ethtool -A eth0 autoneg off rx off tx off
I tried this and re-ran my hadoop test and I'm seeing the same drop-outs
from systems as with this enabled. Running ethtool -S eth0 on a
dropped out system gives the following output.
NIC statistics:
tx_bytes: 45900034824
tx_zero_rexmt: 40968086
tx_one_rexmt: 0
tx_many_rexmt: 0
tx_late_collision: 0
tx_fifo_errors: 0
tx_carrier_errors: 0
tx_excess_deferral: 0
tx_retry_error: 0
rx_frame_error: 0
rx_extra_byte: 0
rx_late_collision: 0
rx_runt: 0
rx_frame_too_long: 0
rx_over_errors: 0
rx_crc_errors: 0
rx_frame_align_error: 0
rx_length_error: 0
rx_unicast: 42104294
rx_multicast: 897
rx_broadcast: 564
rx_packets: 42105755
rx_errors_total: 0
tx_errors_total: 0
tx_deferral: 0
tx_packets: 40968086
rx_bytes: 48159336484
tx_pause: 0
rx_pause: 0
rx_drop_frame: 0
tx_unicast: 3322
tx_multicast: 4392
tx_broadcast: 23998478524
and no messages in the system logs.
These systems are running with DHCP (and have Avahi installed) - is it
possible these are related to the problem (but again, why is it only
showing up when running the 2.6.32 kernel).
I can't see any major changes in the forcedeth driver since 2.6.30.
I scanned what changelogs I could find also and nothing jumped out at me
that could be the cause of this.
We will shortly update the official kernel packages to incorporate this
release, so you could just wait a day or two and update. However I'm not
aware of any changes in 2.6.32.10 that would fix this sort of bug.
Again, I scanned the changelogs and nothing jumped out at me. I'll try
the updated package when you release it to see if it makes a difference.
Let me know if there's any further testing I can do before I roll the
systems back to 2.6.30 and put them back into production.
Thanks,
-stephen
--
Stephen Mulcahy Atlantic Linux http://www.atlanticlinux.ie
Registered in Ireland, no. 376591 (144 Ros Caoin, Roscam, Galway)
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