I'm not on the list so please also reply directly to me. I may soon be done :-)
I was made aware of the following:
>On Sat, May 12, 2001 at 07:37:23PM +0200, Peter Rasmussen wrote:
>> 2.4.4-ac8 doing "time make dep clean bzImage modules modules_install" :
>>
>> udgaard:/usr/src/linux# cat /proc/meminfo
>> total: used: free: shared: buffers: cached:
>> Mem: 328101888 317947904 10153984 0 67219456 130404352
>> Swap: 542859264 0 542859264
>>
>> ======================== 2.2.16 ===========================
>>
>> udgaard:~$ cat /proc/meminfo
>> total: used: free: shared: buffers: cached:
>> Mem: 65789952 60755968 5033984 28221440 7872512 24219648
>> Swap: 542859264 1368064 541491200
>
>2.2.16 only recognizes 64 Mb? That makes all of the numbers less
>interesting, I guess.
>
I hadn't noticed that before and it helped me improving the test. By ensuring
that the two kernels looked at the same size RAM I found that the performance
numbers were the same.
However, I then now wonder why my system gets slower when increasing the amount of
main RAM?
Is it a RAM caching problem in the chipset or the board similar to the braindead
Intel VX430 chipset that couldn't handle more than 64MB? I hope not, but I can't
see any other reason, even though I thought such problems were of the past?
Please let me know if you know something about it.
I found the following relations with regard to memory settings. As the 2.2 and
2.4 kernels I use performed the same with little RAM (64MB), I stayed with the
2.4.4-ac8 for simplicity's sake.
A 2.4.4-ac8 kernel build:
2.4.4-ac8 with 64MB RAM mem-setting: real 8m26.180s
user 7m5.340s
sys 0m39.430s
2.4.4-ac8 with 128MB RAM mem-setting: real 8m20.902s
user 7m8.810s
sys 0m39.800s
2.4.4-ac8 with 160MB RAM mem-setting: real 8m21.653s
user 7m13.830s
sys 0m37.840s
2.4.4-ac8 with 192MB RAM mem-setting: real 9m48.632s
user 8m39.270s
sys 0m39.740s
So it seems around here the performance starts to decrease.
I am still puzzled why the shared memory like the following is always zero on
the 2.4 kernels? All I can remember checking it on has it like that, but I can't
find any explanations about it?
udgaard:/usr/src/linux# cat /proc/meminfo
total: used: free: shared: buffers: cached:
Mem: 64135168 63148032 987136 0 2965504 34447360
Swap: 542859264 147456 542711808
Thank you very much,
Peter
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