Re: fix TCP roundtrip time update code

[Nivedita Singhvi <niv@xxxxxxxxxx>]

David Mosberger wrote:

>   DaveM> So if your old SpecWEB99 lab tended more to trigger timeout
>   DaveM> based retransmits on LAN, and your new test network does not,
>   DaveM> then your new test network will tend to not reproduce the bug
>   DaveM> regardless of whether the bug is present in the kernel or not
>   DaveM> :-)
>
> Is this where I get to plug httperf?  It triggered the bug reliably in
> less than 10 secs. ;-)
Tarnation!! Ran httperf! Didnt hit it! :(. What were your
settings?

I extracted an old debug patch to implement dropping of
packets - have a sysctl that controls the rate at which I
can drop IP packets, so can also generate any kind of packet
loss..So thought I would bang away with netperf using
sendfile()/TCP_CORK. Thought it was in that code path.
Will be running tests tmrw and the rest of this
week on 2.5.70 +- patch. Will see if I can provoke any
further hangs, stalls, wackiness of any flavor...

thanks,
Nivedita