rihad wrote:
Robert Watson wrote:
I would suggest making just the HZ -> 4000 change for now and see how
it goes.
OK, I will try testing HZ=4000 tomorrow morning, although I'm pretty
sure there still will be some drops.
Can someone please say how to increase the "ifnet transmit queue sizes"?
Unfortunately, I fear that this is driver-specific, and in the case of
bce requires a recompile. In the driver init code in if_bce, the
following code appears:
ifp->if_snd.ifq_drv_maxlen = USABLE_TX_BD;
IFQ_SET_MAXLEN(&ifp->if_snd, ifp->if_snd.ifq_drv_maxlen);
IFQ_SET_READY(&ifp->if_snd);
Which evaluates to a architecture-specific value due to varying
pagesize. You might just try forcing it to 1024.
I think I'll try this too, if HZ=4000 doesn't help, thanks a lot.
In the long run we'll switch to some high-quality 10 GiGE cards.
for output..
It may still be possible for the output queues to be overrun as teh
bursts from dummynet can be much faster than even 10G hardware can
dispose of the data.
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