misc/94228: Low perf of i386 6.0 on dell poweredge 1850 bi-Xeon 2.8ghz DualCore

[Eric]

>Number:         94228
>Category:       misc
>Synopsis:       Low perf of i386 6.0 on dell poweredge 1850 bi-Xeon 2.8ghz DualCore
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          update
>Submitter-Id:   current-users
>Arrival-Date:   Wed Mar 08 14:40:03 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Eric
>Release:        I386 6.0
>Organization:
>Environment:
FreeBSD 6.0-RELEASE i386
>Description:
Hi,

I buy a new DELL PowerEdge 1850 with Bi-Xeon 2.8GHZ/2*2MB Dual Core 800FSB processor, 2Go DDR2 RAM, PERC4di RAID controller with 2 SCSI U320 15.000tpm 36Go hdd on RAID1.

I install on it Freebsd 6.0, apache 2.2.0 and mysql 4.1.18 and compare performance with :

OLD PowerEDge with only simple Bi-Xeon 3.0 GHZ and freebsd 4.11.

Result is that web and local databases query are +- 4 times slower with freebsd 6.0 and dual-core.

I try with and without smp and  threaded kernel and results are same.
I came back to Generic kernel to see if it come from my kernel configuration but result was same.

I then think it come from hardware configuration, call DELL, then I change lots of settings but result was same.

I then try to install a slackware distribution and have really good performances.

Do you have any idea?
Do you think 6.1 release will be ok?

N.B : I run ubench tests but I don't think result is significative


>How-To-Repeat:
As with this type of performance it's not possible for us to use this server I can make as many test as necessary.



>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: