I'm experiencing a highly reproducible issue with TCP traffic on
a couple PowerMac G4s. Incoming TCP traffic is slow: only about
18-20 Mbps on a 100 Mbps link. Outgoing TCP connections, on the
other hand, run just shy of 100 Mbps, as does UDP in either
direction.
I have reproduced this symptom on two PowerMac G4 "AGP Graphics"
machines with clean installs of 4.1 and using all three of the
xl, vr, and gem network device drivers. PF and
net.inet.ip.forward were disabled during TTCP testing (in fact,
no additional software whatsoever has been installed aside from
ttcp and netperf). The dmesg of one of these machines is
provided at the end of this message.
For reference, I performed the same test on my laptop, which
runs 4.1/i386. It does not suffer this performance issue.
I'd be the last to shout "bug" in a crowded theater, so I was
hoping that somebody here could point out what I'm most likely
doing wrong; or, failing that, that somebody more familiar with
the architecture than I could help me determine whether my
systems have brought out some sort of elusive misbehavior.
Thanks!
Mark
dmesg:
0x15000 not configured
adb0 at macobio0 offset 0x16000 irq 25: via-pmu, 0 targets
apm0 at adb0: battery flags 0x9, 0% charged
ki2c1 at macobio0 offset 0x18000
iic1 at ki2c1
wdc0 at macobio0 offset 0x1f000 irq 19: DMA
wd0 at wdc0 channel 0 drive 0: <ST3320620A>
wd0: 16-sector PIO, LBA48, 305245MB, 625142448 sectors
wd0(wdc0:0:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 4
wdc1 at macobio0 offset 0x20000 irq 20: DMA
atapiscsi0 at wdc1 channel 0 drive 0
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <HITACHI, DVD-ROM GD-3000, 020S> SCSI0 5/cdrom
removable
atapiscsi1 at wdc1 channel 0 drive 1
scsibus1 at atapiscsi1: 2 targets
sd0 at scsibus1 targ 0 lun 0: <IOMEGA, ZIP 100, 04.H> SCSI0 0/direct removable
sd0: drive offline
cd0(wdc1:0:0): using BIOS timings, DMA mode 1
sd0(wdc1:0:1): using BIOS timings, DMA mode 1
wdc2 at macobio0 offset 0x21000 irq 21: DMA
ohci0 at pci2 dev 8 function 0 "Apple USB" rev 0x00: irq 27, version 1.0
usb0 at ohci0: USB revision 1.0
uhub0 at usb0
uhub0: Apple OHCI root hub, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
ohci1 at pci2 dev 9 function 0 "Apple USB" rev 0x00: irq 28, version 1.0
usb1 at ohci1: USB revision 1.0
uhub1 at usb1
uhub1: Apple OHCI root hub, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
"TI TSB12LV23 FireWire" rev 0x00 at pci2 dev 10 function 0 not configured
mpcpcibr2 at mainbus0 pci: uni-north, Revision 0xff
pci3 at mpcpcibr2 bus 0
pchb2 at pci3 dev 11 function 0 "Apple Uni-N Eth" rev 0x00
gem0 at pci3 dev 15 function 0 "Apple Uni-N GMAC" rev 0x00: irq 41, address
00:30:65:40:cf:5c
bmtphy0 at gem0 phy 0: BCM5201 10/100 PHY, rev. 2
uhub2 at uhub1 port 1
uhub2: Mitsumi Electric Hub in Apple Extended USB Keyboard, rev 1.10/4.20, addr
2
uhub2: 3 ports with 2 removable, bus powered
uhidev0 at uhub2 port 3 configuration 1 interface 0
uhidev0: Mitsumi Electric Apple Extended USB Keyboard, rev 1.10/4.20, addr 3,
iclass 3/1
ukbd0 at uhidev0: 8 modifier keys, 6 key codes
wskbd0 at ukbd0: console keyboard, using wsdisplay0
uhidev1 at uhub2 port 3 configuration 1 interface 1
uhidev1: Mitsumi Electric Apple Extended USB Keyboard, rev 1.10/4.20, addr 3,
iclass 3/0
uhidev1: 3 report ids
uhid0 at uhidev1 reportid 2: input=1, output=0, feature=0
uhid1 at uhidev1 reportid 3: input=3, output=0, feature=0
bootpath: '/[EMAIL PROTECTED]/@d/[EMAIL PROTECTED]/[EMAIL PROTECTED]/[EMAIL
PROTECTED]/bsd'
boot device: wd0.
root on wd0a
rootdev=0x0 rrootdev=0xb00 rawdev=0xb02
wdc0:0:0: intr with DRQ (st=0x58<DRDY,DSC,DRQ>)
wd0h: device timeout writing fsbn 501788908 of 5669824-0 (wd0 bn 535538876; cn
531288 tn 9 sn 5), retrying
wd0: soft error (corrected)
arpresolve: can't allocate llinfo
arpresolve: can't allocate llinfo
arpresolve: can't allocate llinfo
arpresolve: can't allocate llinfo
arpresolve: can't allocate llinfo
arpresolve: can't allocate llinfo
arpresolve: can't allocate llinfo
arpresolve: can't allocate llinfo
arpresolve: can't allocate llinfo
arpresolve: can't allocate llinfo
arpresolve: can't allocate llinfo
arpresolve: can't allocate llinfo
arpresolve: can't allocate llinfo
arpresolve: can't allocate llinfo
arpresolve: can't allocate llinfo
syncing disks... done
xl0: reset didn't complete
rebooting
[ using 364116 bytes of bsd ELF symbol table ]
console out [ATY,Rage128Ps]console in [keyboard] USB found
: memaddr 94000000 size 4000000, : consaddr 94008000, : ioaddr 90020000, size
20000: memtag 8000, iotag 8000: width 1024 linebytes 1024 height 768 depth 8
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
Copyright (c) 1995-2007 OpenBSD. All rights reserved. http://www.OpenBSD.org
OpenBSD 4.1 (GENERIC) #1209: Sat Mar 10 19:12:02 MST 2007
[EMAIL PROTECTED]:/usr/src/sys/arch/macppc/compile/GENERIC
real mem = 268435456 (262144K)
avail mem = 234254336 (228764K)
using 1254 buffers containing 13418496 bytes (13104K) of memory
mainbus0 (root): model PowerMac3,1
cpu0 at mainbus0: 7400 (Revision 0x209): 500 MHz: 1MB backside cache
memc0 at mainbus0: uni-n
ki2c0 at memc0 offset 0xf8001000
iic0 at ki2c0
mpcpcibr0 at mainbus0 pci: uni-north, Revision 0xff
pci0 at mpcpcibr0 bus 0
pchb0 at pci0 dev 11 function 0 "Apple Uni-N AGP" rev 0x00
vgafb0 at pci0 dev 16 function 0 "ATI Rage Fury" rev 0x00, mmio
wsdisplay0 at vgafb0 mux 1: console (std, vt100 emulation)
mpcpcibr1 at mainbus0 pci: uni-north, Revision 0xff
pci1 at mpcpcibr1 bus 0
pchb1 at pci1 dev 11 function 0 "Apple Uni-N" rev 0x00
ppb0 at pci1 dev 13 function 0 "DEC 21154 PCI-PCI" rev 0x05
pci2 at ppb0 bus 1
xl0 at pci2 dev 3 function 0 "3Com 3c905C 100Base-TX" rev 0x78: irq 53, address
00:0a:5e:50:e5:9e
exphy0 at xl0 phy 24: 3Com internal media interface
vr0 at pci2 dev 4 function 0 "VIA VT6105 RhineIII" rev 0x86: irq 54, address
00:19:5b:39:04:5e
ukphy0 at vr0 phy 1: Generic IEEE 802.3u media interface, rev. 4: OUI 0x004063,
model 0x0034
macobio0 at pci2 dev 7 function 0 "Apple Keylargo" rev 0x02
openpic0 at macobio0 offset 0x40000: version 0x4614
macgpio0 at macobio0 offset 0x50
macgpio1 at macgpio0 irq 47
"programmer-switch" at macgpio0 not configured
"escc-legacy" at macobio0 offset 0x12000 not configured
zsc0 at macobio0 offset 0x13000: irq 22,50
zstty0 at zsc0 channel 0
zstty1 at zsc0 channel 1
awacs0 at macobio0 offset 0x14000: irq 24,9,10 headphones
audio0 at awacs0
"timer" at macobio0 offset 0x15000 not configured
adb0 at macobio0 offset 0x16000 irq 25: via-pmu, 0 targets
apm0 at adb0: battery flags 0x9, 0% charged
ki2c1 at macobio0 offset 0x18000
iic1 at ki2c1
wdc0 at macobio0 offset 0x1f000 irq 19: DMA
wd0 at wdc0 channel 0 drive 0: <ST3320620A>
wd0: 16-sector PIO, LBA48, 305245MB, 625142448 sectors
wd0(wdc0:0:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 4
wdc1 at macobio0 offset 0x20000 irq 20: DMA
atapiscsi0 at wdc1 channel 0 drive 0
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <HITACHI, DVD-ROM GD-3000, 020S> SCSI0 5/cdrom
removable
atapiscsi1 at wdc1 channel 0 drive 1
scsibus1 at atapiscsi1: 2 targets
sd0 at scsibus1 targ 0 lun 0: <IOMEGA, ZIP 100, 04.H> SCSI0 0/direct removable
sd0: drive offline
cd0(wdc1:0:0): using BIOS timings, DMA mode 1
sd0(wdc1:0:1): using BIOS timings, DMA mode 1
wdc2 at macobio0 offset 0x21000 irq 21: DMA
ohci0 at pci2 dev 8 function 0 "Apple USB" rev 0x00: irq 27, version 1.0
usb0 at ohci0: USB revision 1.0
uhub0 at usb0
uhub0: Apple OHCI root hub, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
ohci1 at pci2 dev 9 function 0 "Apple USB" rev 0x00: irq 28, version 1.0
usb1 at ohci1: USB revision 1.0
uhub1 at usb1
uhub1: Apple OHCI root hub, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
"TI TSB12LV23 FireWire" rev 0x00 at pci2 dev 10 function 0 not configured
mpcpcibr2 at mainbus0 pci: uni-north, Revision 0x16
pci3 at mpcpcibr2 bus 0
pchb2 at pci3 dev 11 function 0 "Apple Uni-N Eth" rev 0x00
gem0 at pci3 dev 15 function 0 "Apple Uni-N GMAC" rev 0x00: irq 41, address
00:30:65:40:cf:5c
bmtphy0 at gem0 phy 0: BCM5201 10/100 PHY, rev. 2
uhub2 at uhub1 port 1
uhub2: Mitsumi Electric Hub in Apple Extended USB Keyboard, rev 1.10/4.20, addr
2
uhub2: 3 ports with 2 removable, bus powered
uhidev0 at uhub2 port 3 configuration 1 interface 0
uhidev0: Mitsumi Electric Apple Extended USB Keyboard, rev 1.10/4.20, addr 3,
iclass 3/1
ukbd0 at uhidev0: 8 modifier keys, 6 key codes
wskbd0 at ukbd0: console keyboard, using wsdisplay0
uhidev1 at uhub2 port 3 configuration 1 interface 1
uhidev1: Mitsumi Electric Apple Extended USB Keyboard, rev 1.10/4.20, addr 3,
iclass 3/0
uhidev1: 3 report ids
uhid0 at uhidev1 reportid 2: input=1, output=0, feature=0
uhid1 at uhidev1 reportid 3: input=3, output=0, feature=0
bootpath: '/[EMAIL PROTECTED]/@d/[EMAIL PROTECTED]/[EMAIL PROTECTED]/[EMAIL
PROTECTED]/bsd'
boot device: wd0.
root on wd0a
rootdev=0x0 rrootdev=0xb00 rawdev=0xb02
uhub2: at uhub1 port 1 (addr 2) disconnected
uhidev0: at uhub2 port 3 (addr 3) disconnected
ukbd0: was console keyboard
wskbd0 detached
ukbd0 detached
uhidev0 detached
uhidev1: at uhub2 port 3 (addr 3) disconnected
uhid0 detached
uhid1 detached
uhidev1 detached
uhub2 detached
--
Mark Shroyer <[EMAIL PROTECTED]>
http://markshroyer.com/
