Re: Request for Testing: TCP RACK

> > Will update amd64 laptop to main-n268827-75464941dc17 (Mar 16) and test it.
> Please do so...

@main-n268827-75464941dc17 GENERIC-NODEBUG amd64

Ok, I think I have here some numbers related to disk performance being
affected by tcp_rack that somehow is messing with something.

NOTES:
- test [1] was done after a boot without tcp_rack in loader.conf and
[2] tcp_rack was loaded manually with kldload (without rebooting)
- After unloading tcp_rack, same results as [2]
- Cannot unload tcptpts: device busy

[1] without tcp_rack loaded:

==> poudriere testport net/gitup:
11.16s real             5.35s user              6.35s sys

==> bonnie++:
Version  1.98       ------Sequential Output------ --Sequential Input- --Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Name:Size etc        /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
leg.home        32G   25k  99  105m  99 88.7m  99   77k  99  198m  99 12716 1784
Latency               351ms    1793us    2340us     241ms     638us    2514us
Version  1.98       ------Sequential Create------ --------Random Create--------
leg.home            -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16 14908.273230  97 +++++ +++ 6878.516657  99
15194.808063  97 +++++ +++ 8019.731670  99
Latency              1108us     182us    2228us    1013us     152us    2424us

[2] kldload tcp_rack:

==> poudriere testport net/gitup:
1m0.54s real            4.98s user              1m31.38s sys

==> bonnie++:
Version  1.98       ------Sequential Output------ --Sequential Input- --Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Name:Size etc        /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
leg.home        32G   14k  99 78.0m  99 46.6m  99   25k  99  120m  99  6688 2161
Latency               676ms   18309us   76171us     385ms     924us    2274us
Version  1.98       ------Sequential Create------ --------Random Create--------
leg.home            -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16 8139.513260  96 19437.792294  99 5494.638508  99
8099.275425  96 19723.528878  99 6363.123671  99
Latency              2982us     338us    3072us    1135us     591us    3236us

Cheers,







--
Nuno Teixeira
FreeBSD Committer (ports)