>On Sat, 28 Mar 1998, Samuli Kaski wrote:
[2.1.91 kernel compile times]
>> 2.0.34-pre4 10 min 36 sec
>> 2.1.91 9 min
>> Nice, not mindblasting though, improvement I would say.
>given that the compiler has not changed between those two compiles, and
>only 20-30% of the compilation time is 'spent' in the kernel, it is
>something like a 50% perceived kernel speed improvement ...
Agreed, the time spent in the kernel has been cut down quite a bit.
Here are some numbers from compiling 2.1.92-pre1 on 2.0.33 vs. itself.
'time make zImage' when running on 2.0.33:
256.38user 26.67system 4:56.43elapsed 95%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (187264major+256670minor)pagefaults 0swaps
Same running on 2.1.92pre1:
256.16user 21.33system 4:47.47elapsed 96%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (187261major+256805minor)pagefaults 0swaps
9 second total speedup (3%), but kernel time dropped 25%.
This system is a K6/233 with 64 MB SDRAM. I've set the makefile to do
'make -j4'.
--
Henrik Storner "...Unix, MS-DOS, and Windows NT
(also known as the Good, the Bad,
and the Ugly)." [Matt Welsh]
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