Hi
All,
I have a box
with 24 e1000 cards in it. They are configured as 12 bridges, each with 2
ports.
I have found that
when the total traffic on the box gets to around 100Mbps or so, it starts
dropping packets.
As far as I can
tell, it's related to the amount of traffic per card, rather than the total
throughput on the box. (I'm using 6 x 4-port ethernet
cards.).
My best guess at
this point is that the receive buffers are either too small, or not being
emptied quickly enough. (NAPI is enabled.).
Can anybody give me
any ideas on where to look for issues?
And how can I change
the size of the receive buffers? Is it just a kernel paramater, or do I need to
re-compile?
CPU utilisation is
hovering around 50%, and load average is consistently under 0.1, so I don't
beleive I'm looking at a CPU bottleneck.
Any other
ideas?
Regards,
Leigh
Leigh
Leigh Sharpe
Network Systems Engineer
Pacific Wireless
Ph +61 3 9584 8966
Mob 0408 009 502
Network Systems Engineer
Pacific Wireless
Ph +61 3 9584 8966
Mob 0408 009 502
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