On 09/08/2012 22:02, Rick Jones wrote:
[]
My recollections may not fit well with unruh's data (or perhaps they
do), but interrupt coalescing is not completely correlated with
interface speed. It is a feature of implementation, not media. Now,
it is generally the case that interrupt coalescing appeared first in 1
GbE NICs, and so the prior 10/100 Mbit/s didn't have it, but that
doesn't necessarily mean that a 1 GbE NIC operating at 100 Mbit/s
won't still have interrupt coalescing going.
So I would think it isn't so much a matter of operating at 100 Mbit/s
vs 1 Gbit/s as it is the interrupt coalescing settings.
rick
* of course since interrupt coalescing can be timing related and since
operating at 100 Mbit/s will have different timing than 1 Gbit/s...
Yes, Rick, my logic had been along the lines that an older 100 Mb/s card
would /not/ have interrupt coalescing, whereas a 100 Mb/s card /might/.
I take your point about simply turning down the speed not turning off
the feature.
("Card" here includes motherboard interfaces.)
--
Cheers,
David
Web: http://www.satsignal.eu
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