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Sparc64 - console too slow and freezes everything


I have installed 3.2 on an UltraSparc 5. Everything is fine
but the console performance.
The scrolling is too slow and the interesting side is it freezes
every running process while it scrolls up. This makes remote ssh
connections a nightmare when someone is working on the console.

Another problem is with the SCSI controller which gets controlled
by siop driver. Continuously dumps the messages below.

   siop1: scsi bus reset
   siop1: target 0 now using 8 bit async xfers
   siop1: target 1 now using 8 bit async xfers
...[ cut: similar lines with targes 2-9 ]...
   siop1: target 10 now using 8 bit async xfers
   probe(siop1:11:0): command with tag id 0 reset
   siop1: target 11 now using 8 bit async xfers
   probe(siop1:11:0): timeout on SCSI command 0x12

The machine has no SCSI drives so I disabled the siop to stop seeing
these errors.


Here is the dmesg
-------------------------------8<---[ cut here ]-----------------
Copyright (c) 1982, 1986, 1989, 1991, 1993
        The Regents of the University of California.  All rights reserved.
Copyright (c) 1995-2002 OpenBSD. All rights reserved.

OpenBSD 3.2 (GENERIC) #8: Thu Oct  3 20:00:17 MDT 2002
total memory = 134217728
avail memory = 115826688
using 819 buffers containing 6709248 of memory
bootpath: /pci_(_at_)_1f,0/pci_(_at_)_1,1/ide_(_at_)_3,0/disk_(_at_)_0,0
mainbus0 (root): SUNW,Ultra-5_10
cpu0 at mainbus0: SUNW,UltraSPARC-IIi @ 270 MHz, version 0 FPU
cpu0: physical 32K instruction (32 b/l), 16K data (32 b/l), 256K external
(64 b/
psycho0 at mainbus0 addr 0xfffc4000
SUNW,sabre: impl 0, version 0: ign 7c0 bus range 0 to 2; PCI bus 0
IOTDB: 7c6000 to 846000
pci0 at psycho0
ppb0 at pci0 dev 1 function 1 "Sun Simba PCI-PCI" rev 0x11
pci1 at ppb0 bus 1
ebus0 at pci1 dev 1 function 0 "Sun PCIO Ebus2" rev 0x01
auxio0 at ebus0 addr 726000-726003, 728000-728003, 72a000-72a003,
power at ebus0 addr 724000-724003 ipl 37 not configured
SUNW,pll at ebus0 addr 504000-504002 not configured
sab0 at ebus0 addr 400000-40007f ipl 43: rev 3.2
sabtty0 at sab0 port 0
sabtty1 at sab0 port 1
comkbd0 at ebus0 addr 3083f8-3083ff ipl 41: layout 34
wskbd0 at comkbd0: console keyboard
com0 at ebus0 addr 3062f8-3062ff ipl 42, mouse: ns16550a, 16 byte fifo
lpt0 at ebus0 addr 3043bc-3043cb, 30015c-30015d, 700000-70000f ipl 34: polled
fdthree at ebus0 addr 3023f0-3023f7, 706000-70600f, 720000-720003 ipl 39
not configured
clock0 at ebus0 addr 0-1fff: mk48t59: hostid 80a05253
flashprom at ebus0 addr 0-fffff not configured
audioce0 at ebus0 addr 200000-2000ff, 702000-70200f, 704000-70400f,
722000-722003 ipl 35 ipl 36: nvaddrs 0
audio0 at audioce0
hme0 at pci1 dev 1 function 1 "Sun HME" rev 0x01: address
nsphy0 at hme0 phy 1: DP83840 10/100 media interface, rev. 1
hme0: using ivec 3021 for interrupt
vgafb0 at pci1 dev 2 function 0 "ATI Mach64 GT" rev 0x9a
wsdisplay0 at vgafb0: console (sun, sun emulation), using wskbd0
pciide0 at pci1 dev 3 function 0 "CMD Technology PCI0646" rev 0x03: DMA,
channel 0 configured to native-PCI, channel 1 configured to native-PCI
pciide0: using ivec 1820 for native-PCI interrupt
wd0 at pciide0 channel 0 drive 0: <ST34342A>
wd0: 16-sector PIO, LBA, 4103MB, 8894 cyl, 15 head, 63 sec, 8404830
wd1 at pciide0 channel 0 drive 1: <Maxtor 32049H2>
wd1: 16-sector PIO, LBA, 19541MB, 16383 cyl, 16 head, 63 sec, 40021632
wd0(pciide0:0:0): using PIO mode 4, DMA mode 2
wd1(pciide0:0:1): using PIO mode 4, DMA mode 2
atapiscsi0 at pciide0 channel 1 drive 0
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <GoldStar, CD-ROM CRD-8240B, 1.24> SCSI0
5/cdrom removable
cd0(pciide0:1:0): using PIO mode 4, DMA mode 2
ppb1 at pci0 dev 1 function 0 "Sun Simba PCI-PCI" rev 0x11
pci2 at ppb1 bus 2
"Symbios Logic 53c875" rev 0x14 at pci2 dev 1 function 0 not configured
"Symbios Logic 53c875" rev 0x14 at pci2 dev 1 function 1 not configured
pcons at mainbus0 not configured
No counter-timer -- using %tick at 270MHz as system clock.
root on wd0a
rootdev=0xc00 rrootdev=0x1a00 rawdev=0x1a02
------------------------------->8---[ cut here ]-----------------