date, time problem on ulrasparc III processors

date, time problem on ulrasparc III processors

[Christian Koch]

Hello,

I have a strange problem on Ultrasparc III Cu processor system. There are 2
CPUs in this SUN 280R. I have tried different kernels (2.4.21, 2.4.22)

The problem is, if I request date and time of the system I get different
answers. It seams, that there is a syncing problem between the hardware and
the system clock.

# hwclock --set --date="9/24/03 10:56:00"
# hwclock
Wed Sep 24 10:56:03 2003 -0.232462 seconds
# hwclock
Wed Sep 24 10:56:06 2003 -17180.423522 seconds
# hwclock
Wed Sep 24 10:56:09 2003 -0.637757 seconds

# date
Thu Sep 25 06:05:13 CEST 2003
# date
Thu Sep 25 01:18:53 CEST 2003
# hwclock
Wed Sep 24 10:57:52 2003 -17180.702994 seconds

In the system there are two equal cpu's. cpuinfo shows two different
CpuBogo's.

# cat /proc/cpuinfo
cpu : TI UltraSparc III+ (Cheetah+)
fpu : UltraSparc III+ integrated FPU
promlib : Version 3 Revision 5
prom : 4.5.21
type : sun4u
ncpus probed : 2
ncpus active : 2
Cpu0Bogo : 1599.07
Cpu0ClkTck : 0000000047868c00
Cpu1Bogo : 1.63
Cpu1ClkTck : 0000000047868c00
MMU Type : Cheetah+
State:
CPU0: online
CPU1: online

I think the date, time problem can be a bug in the RTC-module.

Christian

Re: date, time problem on ulrasparc III processors

[David S. Miller]

It is very unlikely that you'll get a response to UltraSPARC
specific problems on linux-kernel, please report this to
sparclinux@vger.kernel.org where the Sparc developers listen.

Thanks.