Messages in this thread | | | From | Bas Mevissen <> | Subject | Re: Problems with too much memory (?) | Date | Thu, 24 Apr 1997 12:28:04 +0200 (MET DST) |
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Pavel Machek wrote: : : Hi! : : This still may be hw problem, but aybe it is not. : My machine is 486DX2/80, 128kb level 2 cache (stolen from one 386 :-), : 20MB ram (16M+4M). It compiles kernel about 32 minutes. : : When I removed 4MB SIMM, compilation time went down to 22 minutes. I : thought that it is hardware problem, but I wanted to investigate it more. : So I put memory back and limited memory to 16M (mem=16M). Compile time : stayed at about 22 minutes. : : So I suspect linux tfor having problems with too much memory. : : My linux is 2.1.35, slightly modified (PCspeaker, Hypertech cdrom, Network : block device, mingo's performance patch into sched.c). : : 30% difference is quite a big one, and I suspect problems somewhere in mm : / buffer code. : : [BTW mingo's patch speeeded up my system by 30% some time ago - and it was : not still included in linux kernel. Why? Could someone compare 2.1.35's : performance with 2.0.29's?] :
If I rember right, there exists a BIOS setup option 'ONLY FIRST 16Mb CACHEABLE' on (old?) motherboards with AMI BIOSes
Bas.
: -- : This is my little buggy signature... Pavel : GCM d? s-: !g p?:+ au- a--@ w+ v- C++@ UL+++ L++ N++ E++ W--- M- Y- R+ : : :
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