Where to troubleshoot Intel PRO/1000 performance problems?

[Sally Janghos]

Aaron,

  Thanks for your reply.  Here is some output from some dd's on the disk that I'm reading/writing to.  

> dd if=/dev/zero of=testfile count=1000000;dd if=testfile of=/dev/null
1000000+0 records in
1000000+0 records out
512000000 bytes transferred in 27.951769 secs (18317267 bytes/sec)
1000000+0 records in
1000000+0 records out
512000000 bytes transferred in 16.864945 secs (30358830 bytes/sec)
> dd if=/dev/zero of=testfile count=1000000 ; dd if=testfile of=/dev/null
1000000+0 records in
1000000+0 records out
512000000 bytes transferred in 28.492921 secs (17969376 bytes/sec)
1000000+0 records in
1000000+0 records out
512000000 bytes transferred in 16.605797 secs (30832607 bytes/sec)

  Am I reading right, the max network transfer rate from this disk will be between 143Mbit and 246Mbit/sec?  Is there a way to determine if there is an IRQ conflict?  How do you find out what IRQ's are currently used by the system?

Sally 

Thu, Mar 22, 2007 at 04:31:16PM -0700, Aaron Seelye wrote:
> If it's platform agnostic, I'd start looking for IRQ conflicts.  It would 
> seems that your test all involve disk io, check that first and narrow down 
> that it's a network or disk problem.  You may have a bum raid card, irq 
> conflict on the network card, any number of things.
> 
> -Aaron
> ----- Original Message ----- 
> From: "Sally Janghos" <list at deeboz.ca>
> To: <freebsd-performance at freebsd.org>
> Sent: Thursday, March 22, 2007 10:16 AM
> Subject: Where to troubleshoot Intel PRO/1000 performance problems?
> 
> 
> >I'm looking for some suggestions on where to start troubleshooting 
> >performance issues on a Intel PRO 1000 card.
> >
> >It's installed in a box with the following configuration:
> >FreeBSD 6.1
> >AMD Athlon(tm) XP 2100+ (1741.42-MHz 686-class CPU)
> >Dell CERC SATA RAID 2
> >
> >The file transfer(ftp/smb/scp) speeds from/to this machine do not appear 
> >to go above 10Mb.  The other machine
> >doing the transfers has similar specs(same Ethernet Card) but is a Windows 
> >XP box.  I've tried replacing the switch with
> >a crossover cable between the machines and the same speed persists.  Any 
> >suggestions on where to start and what tools
> >should I use to do the benchmarks?
> >
> >Thanks,
> > Sally
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