FWIW, I don't see this on a dual-CPU SS10:
NetBSD 3.0_BETA (GENERIC.MP) #0: Fri Jun 24 23:14:08 UTC 2005
        jmc@faith.netbsd.org:/home/builds/ab/netbsd-3/sparc/200506230000Z-obj/home/builds/ab/netbsd-3/src/sys/arch/sparc/compile/GENERIC.MP
total memory = 111 MB
avail memory = 104 MB
bootpath: /iommu@f,e0000000/sbus@f,e0001000/espdma@f,400000/esp@f,800000/sd@4,0
mainbus0 (root): SUNW,SPARCstation-10: hostid 7270d152
cpu0 at mainbus0: mid 8: TMS390Z50 v0 or TMS390Z55 @ 50 MHz, on-chip FPU
cpu0: physical 20K instruction (64 b/l), 16K data (32 b/l), 1024K external (32 b
/l): cache enabled
cpu1 at mainbus0: mid 10: TMS390Z50 v0 or TMS390Z55 @ 50 MHz, on-chip FPU
cpu1: physical 20K instruction (64 b/l), 16K data (32 b/l), 1024K external (32 b
/l): cache enabled
obio0 at mainbus0
clock0 at obio0 slot 0 offset 0x200000: mk48t08
timer0 at obio0 slot 0 offset 0x300000: delay constant 23
zs0 at obio0 slot 0 offset 0x100000 level 12 softpri 6
zstty0 at zs0 channel 0 (console i/o)
zstty1 at zs0 channel 1
zs1 at obio0 slot 0 offset 0x0 level 12 softpri 6
kbd0 at zs1 channel 0: baud rate 1200
ms0 at zs1 channel 1: baud rate 1200
fdc0 at obio0 slot 0 offset 0x700000 level 11 softpri 4: chip 82077
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
auxreg0 at obio0 slot 0 offset 0x800000
power0 at obio0 slot 0 offset 0xa01000 level 2
iommu0 at mainbus0 ioaddr 0xe0000000: version 0x3/0x0, page-size 4096, range 64M
B
sbus0 at iommu0: clock = 20 MHz
dma0 at sbus0 slot 15 offset 0x400000: DMA rev 2
esp0 at dma0 slot 15 offset 0x800000 level 4: ESP200, 40MHz, SCSI ID 7
scsibus0 at esp0: 8 targets, 8 luns per target
ledma0 at sbus0 slot 15 offset 0x400010: DMA rev 2
le0 at ledma0 slot 15 offset 0xc00000 level 6: address 08:00:20:19:cb:67
le0: 8 receive buffers, 2 transmit buffers
bpp0 at sbus0 slot 15 offset 0x4800000 level 2 (ipl 3): DMA rev 2
SUNW,DBRIe at sbus0 slot 15 offset 0x8010000 level 9 not configured
cgsix0 at sbus0 slot 2 offset 0x0 level 9: SUNW,501-2325, 1152 x 900, rev 11cgsix0: attached to /dev/fb

eccmemctl0 at mainbus0 ioaddr 0x0: version 0x0/0x1
Kernelized RAIDframe activated
scsibus0: waiting 2 seconds for devices to settle...
sd0 at scsibus0 target 3 lun 0: <QUANTUM, FIREBALL SE2.1S, PJ09> disk fixed
sd0: 2051 MB, 7637 cyl, 2 head, 275 sec, 512 bytes/sect x 4201304 sectors
sd0: sync (100.00ns offset 15), 8-bit (10.000MB/s) transfers, tagged queueing
sd1 at scsibus0 target 4 lun 0: <SEAGATE, ST34572N, 0876> disk fixed
sd1: 4340 MB, 6300 cyl, 8 head, 176 sec, 512 bytes/sect x 8888924 sectors
sd1: sync (100.00ns offset 15), 8-bit (10.000MB/s) transfers, tagged queueing
root on sd1a dumps on sd1b
root file system type: ffs
cpu0: booting secondary processors: cpu1

There is a cgsix in the box but it's not used (I use serial console).

-- 
Manuel Bouyer <bouyer@antioche.eu.org>
     NetBSD: 26 ans d'experience feront toujours la difference
--