[Performance] Samba 3 vs. Samba 4 performance in NetBench

[Kaplan, Marc]

Tridge,

The results haven't changed much in the ext2 test with Samba 4 rebuilt
from a straight ./configure (there were no special options configured). 

Server attributes: Pentium 4 2.4GHz, 512MB RAM, 3-drive Software RAID-0,
broadcom GigE NIC. SUSE EL8, handbuilt 2.6.11.11 kernel, ext2 file
system.

Samba build: Samba3-SVN-7569(oplocks off), Samba4-SVN-7568(posix:xattrs
= no)

NETBENCH
Clients 	Samba3	Samba4		
1		51.150	42.285
4		203.449	171.702
8		204.407	170.333
12		194.383	159.905
16		189.470	154.434
20		185.257	150.425
24		185.442	149.986
28		184.451	149.125
32		182.569	150.044

This is basically the same pattern as before.

BENCH-NBENCH
Clients 	Samba3	Samba4
1		31.34		30.41
2		30.87		30.14
3		30.89		30.22
4		30.93		30.13
5		30.85		29.75
6		30.42		29.78
7		27.13		29.79
8		24.96		26.56
9		23.03		24.96
10		23.45		22.88

So still, we're maxed out in terms of CPU and performance at a single
BENCH-NBENCH client. It is worthwhile to note that because I'm doing
this over localhost, the smbtorture processes itself is using CPU (looks
like a 35% smbtorture to 65% smbd split). The difference between samba3
and samba4 in the NBENCH test is so small, that I would say it's not
significant at all. 

The next step is to get you a sniff of a one client NetBench, which I'll
try to do soon. I'd also like to run the test on a faster box --
possibly dual or quad CPU, but I'll have to dig around some to find one.


		-Marc

> -----Original Message-----
> From: Andrew Tridgell [mailto:tridge at osdl.org]
> Sent: Sunday, June 12, 2005 2:15 AM
> To: Kaplan, Marc
> Cc: samba-technical at lists.samba.org
> Subject: RE: [Performance] Samba 3 vs. Samba 4 performance in NetBench
> 
> Marc,
> 
>  > Are you not seeing all of these? If not, maybe it's a bug in the
>  > spreadsheet software you're using.
> 
> nope, its a bug in the user who doesn't know enough about spreadsheets
:-)
> 
> I've had a look at the detailed numbers now, and still can't
> understand whats happening. One puzzling thing is that the "engines
> participating" looks wrong in a lot of cases. For example, for the
> dm_60_clients load, only 55 clients participated with Samba4, whereas
> Samba3 had 58. Why weren't both 60?  Did you use exactly the same load
> file for both runs? If you did, then I wonder why NetBench didn't show
> an error for one or both of them.
> 
> Have you had a chance to try BENCH-NBENCH with the scripts I sent you?
> 
> Any chance to get a sniff of the 1 client cases with oplocks and attrs
> off?
> 
> Cheers, Tridge