It doesn't do much good turning it off for KVM... I'm still getting blank checksums and dropped packets. Can anyone offer some help? http://forum.pfsense.org/index.php/topic,62535.0.html
Jeffrey Mealo Director of Data and Accountability String Theory Schools The Bellevue - Suite 930 200 S. Broad St Philadelphia, PA 19102 (215) 334-4222 x111 On Thu, May 23, 2013 at 5:40 PM, Adam Thompson <[email protected]>wrote: > ** > > On 2013-05-23 02:37, Ermal Luçi wrote: > > On Thu, May 23, 2013 at 4:28 AM, Adam Thompson <[email protected]>wrote: > >> I wonder, do you know of any heuristics to help judge (without doing >> extensive benchmarking, since I don't happen to have any Ixia gear >> handy...) when we're just as well off disabling all the offload functions? >> I wonder particularly about the code path to fix up tunnel packets so the >> igb/em/bce/bge can do their apparently-very-special cksum offload. >> >> I think it all comes down to latency. > If you have cpu contention and high load it would be beneficial to have > the hardware(nic) do the checksum work for you anyway since the latency > will be lower. > > > > So in the usual case, where my pfSense routers have excessively-powerful > CPUs, and bge(4) NICs... are you saying I should expect lower latency with > h/w offload turned ON or OFF? > > And, why does pfSense turn off h/w offloading by default? Is that only > done automatically inside VMs? I know this has been discussed here > previously, but I can't find the thread now. > > -Adam > > > > > _______________________________________________ > List mailing list > [email protected] > http://lists.pfsense.org/mailman/listinfo/list > >
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