In article <030731000425.M0106168@mirage.ceres.dti.ne.jp>
I wrote:

> I'm not sure if this is normal because the last build.sh I tried
> was more than two years ago, but it seems system CPU time
> during complilation is higher than before:
 :

It seems sparc/machdep.c rev 1.230 fixes this problem.
>> Committed By:	pk
>> Date:		Sat Aug  2 08:10:45 UTC 2003
>> 
>> Modified Files:
>>	src/sys/arch/sparc/sparc: machdep.c
>> 
>> Log Message:
>> On small sun4c machines trim the buffer cache to reduce the demand for
>> kernel virtual memory. This leaves more of the precious PMEG resources
>> available for user space VM which speeds up things considerably, since
>> a reasonable PMEG working set can be maintained.

With 1.6U kernel, time for compiling my custom kernel says:
> 13907.897u 11339.194s 7:31:19.53 -65.-3%	0+0k 84+13413io 287pf+23w
(I don't know why it shows negative values BTW)
With 1.6W kernel:
> 13744.456u 1748.553s 4:32:30.59 94.7%	0+0k 68+13313io 315pf+23w

I think now old sun4c machines become usable again after UBC merge.
Thanks Paul!
---
Izumi Tsutsui
tsutsui@ceres.dti.ne.jp