Date: Thu, 21 Sep 1995 18:08:36 -0400 (EDT) From: Chris Vance <cvance@cfar.umd.edu> To: hardware@freebsd.org Cc: Christopher Vance <cvance@cfar.umd.edu> Subject: Adaptech 1542 & 3Com 3c509 conflict? Message-ID: <Pine.SUN.3.91.950921180735.7270A-100000@empedocles.cfar.umd.edu>
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I seem to have some sort of conflict between my network interface and
scsi disks. The scsi controller is an adaptech 1542CF and the eth
adapter is a 3c509.
Basically, the network is slow writing to a scsi disk, and fast the
rest of the time. Has anyone seen this before? Can anyone suggest
something I could do to fix the situation?
I would appreciate any help and or experiences with this setup. I
have tried moving the scsi controller to irq 15 and the 3c509 to irq
5, without any luck. I'm out of ideas...
A bunch of stats & info are included below.
thanks.
chris.
------------------- Useful Bits -------------------
ftping to a computer on the same ethernet segment:
ftp a 10M file writing it to the scsi disk (sd0s1f):
10027008 bytes received in 36 seconds (2.8e+02 Kbytes/s)
get a 10M file writing it to /dev/null:
10027008 bytes received in 19 seconds (5.1e+02 Kbytes/s)
get a 10M file writing it to an IDE disk (wd1s1a)
10027008 bytes received in 19 seconds (5e+02 Kbytes/s)
The hard drive is plenty fast:
(home on /dev/sd0s1f)
[1119] shadow ~ >iozone 16 8192
...
IOZONE performance measurements:
1915685 bytes/second for writing the file
1827645 bytes/second for reading the file
I've also run iozone while ftping a huge file to /dev/null, and the
iozone results are within 100kps of the above speeds, however the
network speed plummets to 200kps.
dmesg output (edited):
...
aha0: AHA-1542CF BIOS v2.01-VC.0, enabling mailbox, enabling residuals
aha0: reading board settings, dma=5 int=11 200 nSEC ok, using 250 nSEC
aha0 at 0x330-0x333 irq 11 drq 5 on isa
(aha0:0:0): "MICROP 2217-15MQ1001901 HQ30" type 0 fixed SCSI 2
sd0(aha0:0:0): Direct-Access 1685MB (3450902 512 byte sectors)
sd0(aha0:0:0): with 2372 cyls, 15 heads, and an average 96 sectors/track
(aha0:3:0): "ARCHIVE Python 25588-XXX 2.96" type 1 removable SCSI 2
st0(aha0:3:0): Sequential-Access density code 0x13, drive empty
wdc0 at 0x1f0-0x1f7 irq 14 on isa
wdc0: unit 0 (wd0): <WDC AC2340H>
wd0: 325MB (666600 sectors), 1010 cyls, 12 heads, 55 S/T, 512 B/S
wdc0: unit 1 (wd1): <WDC AC2200F>
wd1: 202MB (415380 sectors), 989 cyls, 12 heads, 35 S/T, 512 B/S
...
1 3C5x9 board(s) on ISA found at 0x300
ep0 at 0x300-0x30f irq 10 on isa
ep0: aui/bnc/utp[*UTP*] address 00:20:af:10:cd:33 irq 10
bpf: ep0 attached
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