Poor Samba throughput on 6.0

Joao Barros joao.barros at gmail.com
Thu May 25 15:25:40 PDT 2006


On 5/25/06, Mike Jakubik <mikej at rogers.com> wrote:
> Nash Nipples wrote:
> > Hi Guys,
> >
> > has anyone actually managed to speed up the thing up to 10-12 MB/s
> >
> > i have a good 7-9 MB/s on large files and that should be enough, but still, out of curiosity?
> >
> >
>
> No, not really. The performance of samba on freebsd still sucks. I have
> a gigabit link between my samba server and windows xp workstation, both
> use the intel em card. The fastest i can download from the freebsd
> server is 15.946 MB/s, fastest upload to is 13.594 MB/s. Thats pretty
> poor for a gigabit link. However, 9MB/s on your link is not bad at all,
> one has to consider the protocol overhead.
>
> > Oh by the way:
> > 100 MB ethernet
> > ping -s 65507 -f windowshost  ~ 10-12 MB/s
> > ftp open freebsdhost put/get 500MB.file ~ 10-12 MB/s
> > net.inet.tcp.inflight.enable=1 who said u have to put it down?
> >
>
> This feature limited the speed of LANs, however recent code has aimed to
> fix that, but i don't think its in 6.0. I used a recent -CURRENT for the
> tests, you should consider updating to -STABLE.



That's supposed to be in 6.1, but still the speed still is sub par :

On 2/16/06, Andre Oppermann <andre at freebsd.org> wrote:
> andre       2006-02-16 19:38:07 UTC
>
>   FreeBSD src repository
>
>   Modified files:
>     sys/netinet          tcp_input.c tcp_subr.c tcp_timer.h
>                          tcp_var.h
>   Log:
>   Have TCP Inflight disable itself if the RTT is below a certain
>   threshold.  Inflight doesn't make sense on a LAN as it has
>   trouble figuring out the maximal bandwidth because of the coarse
>   tick granularity.
>
>   The sysctl net.inet.tcp.inflight.rttthresh specifies the threshold
>   in milliseconds below which inflight will disengage.  It defaults
>   to 10ms.
>
>   Tested by:      Joao Barros <joao.barros-at-gmail.com>,
>                   Rich Murphey <rich-at-whiteoaklabs.com>
>   Sponsored by:   TCP/IP Optimization Fundraise 2005
>
>   Revision  Changes    Path
>   1.288     +10 -0     src/sys/netinet/tcp_input.c
>   1.237     +7 -1      src/sys/netinet/tcp_subr.c
>   1.28      +3 -0      src/sys/netinet/tcp_timer.h
>   1.127     +1 -0      src/sys/netinet/tcp_var.h
> _______________________________________________

-- 
Joao Barros


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