[Samba] Trying to find a bottleneck

[Gerald Drouillard]

Jeff Morrow wrote:
> I'm trying to get my network setup as streamlined as possible.  I ran a 
> brain-dead-simple speed test of Samba and I'm very confused by the 
> results.  Here's my setup:
> 
> Fast new WinXP Pro machine
> NetGear GA311 gigabit ethernet
>   ^
>   |     dedicated gigabit ethernet line (no switch)
>   v
> RTL8169 gigabit ethernet
> Relatively fast new Debian Linux machine
> 
> I set up ramdisks on both machines to ensure that the hard drives were 
> not the bottleneck.  I then put a roughly 7 MB file on the linux ramdisk 
> and mounted that disk on my windows box via Samba.  I then wrote a .bat 
> script on the windows side that copies the file from the linux ramdisk 
> to the windows ramdisk over and over again.
> 
> On the windows side, the network utilization monitor says that network 
> load stays around 25-30%.  It occasionally gets as high as 40%.  CPU 
> usage on the windows side is negligible.  On the linux side, top reports 
> that smbd is taking about 30% CPU.
> 
> I'm confused by the fact that neither network utilization nor CPU usage 
> on either computer is getting anywhere near 100%.  I'm wondering if 
> there are any config settings I can tweak to get Samba to fill my 
> gigabit line more fully.
> 
> Thanks alot.
> 
> Jeff Morrow

Have you tried in your smb.conf:
socket options = TCP_NODELAY SO_SNDBUF=65536 SO_RCVBUF=65536 IPTOS_LOWDELAY


-- 
Regards
--------------------------------------
Gerald Drouillard
Technology Architect
Drouillard & Associates, Inc.
http://www.Drouillard.ca