[Codel] [PATCH net-next] codel: use Newton method instead of sqrt() and divides

[Roger Jørgensen]

On Mon, May 14, 2012 at 8:47 AM, dave taht <dave.taht at gmail.com> wrote:
> On 05/13/2012 11:33 PM, dave taht wrote:
>> On 05/13/2012 11:17 PM, Eric Dumazet wrote:
>>> On Sun, 2012-05-13 at 23:00 -0700, dave taht wrote:
>>>>
>>>> I am sitting here with the latest fq_codel implementation on cerowrt,
>>>> and
>>>> this new 16 bit change.
>>>>
>>>> With either interface, running netserver on the router, I get
>>>> ~260Mbit/sec out of it,
>>>> with fq_codel on. It's quite marvelous, as ping times stay in the 2-3ms
>>>> range...
>>>>
>>> If you disable TSO and GSO, do you still get good numbers ?
>
>
> This is the first time I've had these puppies not crash in a month under
> workloads like this.
>
> *Everything* I have has TSO and GSO off by default. That stuff has cause me
> no end of grief.
>
> But for you...
>
> I just fired up a long duration ipv6 test with TSO/GSO on the driving host,
> at 1Gbit, with fq_codel on all sides... with  10 TCP_MAERTS, 10 TCP_STREAMS,
> over pure IPv6
>
> and am running test for 6000 seconds.  and I'm going to dinner. :)
>
> At the moment I see ping times 1.553 avg, 5.999 max, I can do a CDF plot of
> the next run.
>
> Actually I think ipv4 fragmentation is still busted in cero, but I'm getting
> ther....

could you pass me the script for setting that up, got nowhere with any
of the previous... will try the same on some 10GigE servers over v6...



-- 

Roger Jorgensen           | ROJO9-RIPE
rogerj at gmail.com          | - IPv6 is The Key!
http://www.jorgensen.no   | roger at jorgensen.no