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Date:      Fri, 22 Jul 2011 16:26:35 -0400
From:      "Michael W. Lucas" <mwlucas@blackhelicopters.org>
To:        Mike Tancsa <mike@sentex.net>
Cc:        questions@freebsd.org
Subject:   Re: em0 NIC slow on 8.2-p1 amd64?
Message-ID:  <20110722202635.GA57111@bewilderbeast.blackhelicopters.org>
In-Reply-To: <4E29DA4F.9010006@sentex.net>
References:  <4D301C9702145855@> <20110721141011.GB47190@bewilderbeast.blackhelicopters.org> <4D7F86D5017EB3D8@> <20110721151210.GA47663@bewilderbeast.blackhelicopters.org> <4D301C9702253683@> <4E29BC1F.6060103@sentex.net> <20110722190821.GA55040@bewilderbeast.blackhelicopters.org> <4E29D37E.8070908@sentex.net> <20110722201034.GA56830@bewilderbeast.blackhelicopters.org> <4E29DA4F.9010006@sentex.net>

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On Fri, Jul 22, 2011 at 04:15:11PM -0400, Mike Tancsa wrote:
> On 7/22/2011 4:10 PM, Michael W. Lucas wrote:
> > 
> > 
> >     3.65  419155.4
> 
> Thats 400Mb/s no ?   Whats the CPU in this thing ? Also your NIC version
> was 7.1.9.  RELENG_8 has 7.2.3. Can you try that version if possible ?

<facepalm> I sit corrected, decimal point error. My apologies, long
day here.

For the CPU, 400Mbs isn't bad.

CPU: Intel(R) Celeron(R) CPU          420  @ 1.60GHz (1600.01-MHz K8-class CPU)
  Origin = "GenuineIntel"  Id = 0x10661  Family = 6  Model = 16  Stepping = 1
  Features=0xafebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,TM,PBE>
  Features2=0xe31d<SSE3,DTES64,MON,DS_CPL,TM2,SSSE3,CX16,xTPR,PDCM>
  AMD Features=0x20100800<SYSCALL,NX,LM>
  AMD Features2=0x1<LAHF>
  TSC: P-state invariant

My ~30MB/s from applications is roughly 240Mb/s. 

Will applications such as NFS cut bandwith usage that much?

I'll try the newer driver.


> > So no, I'm not saturating this network. Not even close. I have a
> > machine with a 100Mbs vr0 that can spit out twice that much.
> 
> How could FastE nics do 800Mb/s ?

Same decimal point error. It's clearly time for me go home.

Thanks,
==ml

-- 
Michael W. Lucas 	
http://www.MichaelWLucas.com/, http://blather.MichaelWLucas.com/
Latest book: Network Flow Analysis http://www.networkflowanalysis.com/
mwlucas@BlackHelicopters.org, Twitter @mwlauthor



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