Re: Where to troubleshoot Intel PRO/1000 performance problems?

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@xxxxxxxxx>
To: <freebsd-performance@xxxxxxxxxxx>
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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