Hi Roamer
> By the way, LSO has its targeting area, and it's won full-TOE because of
> its simpleness for both software and hardware supports.
>
This belief system may only be true for Solaris. M$ has adopted TOE,
and what a difference it makes, it's normal to see line rate with Win2K3
NDIS5.2 with ~20% utilization in both directions ~18G. I can't go on
much further on that, but M$ is not stopping at that. Plus FreeBSD also
has a project to enable TOE.
Without TOE it's also possible to get line rate but you usually burn a
complete
CPU core maybe another half. Also Toe (considered a freeby) has become
an integral part of other the technologies like, iSCSI, iWARP, and newer up
and coming FCoE technologies.
Still LSO solves only the Tx problem, TOE, like Multidata was going after
the whole RX/TX problem. LSO takes a victory at Sun, but it's by no
means over on the TOE front in the rest of the world.
Frank
>
> Thanks,
>
> Roamer
>
>
>> Simply accumulating writes avoids those problems, and that's what I
>> think is slightly attractive about MDT. Not that I'm wild about MDT,
>> given the overhead.
>>
>> For what it's worth, I think optimizing the path down into (and back
>> from) the driver is a better long-term solution. It doesn't require
>> things MDT. And it'll work for everybody, unlike LSO.
>>
>>
>
>
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