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08.12.2008 at 04:25AM PDT, ID: 23640770
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6.4

TCP offloading

Asked by ro8inmorgan in TCP/IP

I've seen many different opinions about tcp checksum and segmentation offloading to the network adapters.. Many sites which are for it they just tell you it can greatly improve performance but do not really give you any details.. The sites what are against it (mostly linux user sites) say.. Mostly the cheaper network adapter hardware can never beat the servers more expensive cpu also a lot of error checking gets lost cause even if the server might send or receive a corrupt packet the adapter happely does its work on it as the adapter has no clue as it is wrong or right.

So in general the conclusion seems to be unless you have problems with too high CPU usage caused by the network traffic it is safer to turn it off as in overal the tcp stack of the OS has its advantages over the tcp stack from the adapter..

Now this left me wondering.  (because i just can't let it go lol)

if you have low cpu usage on your servers can  you still improve performance by enabling it?? Also how much network traffic can the offloading engines on the adapters in general really handle? Because there's no way to really tell if the adapter can handle the load as there are no monitoring tools to check what the offloading engines are really doing..

And for what kind of traffic does it really help? im running a few streaming servers and wonder if it helps to enable or not..
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[+][-]08.13.2008 at 05:20AM PDT, ID: 22221007

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Zone: TCP/IP
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Solution Provided By: ro8inmorgan
Participating Experts: 0
Solution Grade: A
 
 
[+][-]08.18.2008 at 03:01AM PDT, ID: 22250474

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