Re: Request for Testing: TCP RACK

Hello,

> I don't have the full context, but it seems like the complaint is a performance regression in bonnie++ and perhaps other things when tcp_hpts is loaded, even when it is not used.  Is that correct?
>
> If so, I suspect its because we drive the tcp_hpts_softclock() routine from userret(), in order to avoid tons of timer interrupts and context switches.  To test this theory,  you could apply a patch like:

It's affecting overall system performance, bonnie was just a way to
get some numbers to compare.

Tomorrow I will test patch.

Thanks!

-- 
Nuno Teixeira
FreeBSD Committer (ports)