Yunsong (Roamer) Lu wrote: > LRO is not yet supported in the stack, and there will be some other > issues than the b_cont check in IP. > > But experimentally LRO implementation in driver works after fixing the > check against maximum 2-block of message. You may apply this *hack* to > try your LRO implementation if you can compile IP module for your > Solaris version. >
Roamer, There's also the mblk_pull_len issue (there is a bug for this but I can't find the number right now). At the moment it needs to be set to zero to avoid unnecessary copying in the stack. BTW, I've tested my LRO implementation with netperf on my driver. It does not affect performance of a single stream test (I can get 10G line rate regardless) but the CPU idle % on the netserver end (on the interrupted CPU) goes from ~5% to ~50% i.e. LRO saves nearly half a core of CPU time. Understandably then, it's quite important to getting good performance on multi-stream tests. Any word on when we may see these stack issues fixed? Paul _______________________________________________ networking-discuss mailing list [email protected]
