Messages in this thread |  | | From | (Harald Koenig) | Subject | Re: Memory intensive processes | Date | Wed, 11 Dec 1996 20:21:45 +0100 (MET) |
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> > This is true. Also the act of READING zero-filled pages should not cause > > a trap to the operating system. Many FFTs null-fill a lot of RAM and > > certainly never write to it. > > Not a good idea. Implementing your suggestion would mean that large parts > the page tables which are are just truncated off would have to be allocated > and memory. Just mmaping 1gb from /dev/zero would cost you over 1mb of > *not swappable* memory for page tables. Aside of that allocation and filling > consumes a lot of time.
a very good idea since page tables are in virtual memory and swappable themself in VMS...
Harald -- All SCSI disks will from now on ___ _____ be required to send an email notice 0--,| /OOOOOOO\ 24 hours prior to complete hardware failure! <_/ / /OOOOOOOOOOO\ \ \/OOOOOOOOOOOOOOO\ \ OOOOOOOOOOOOOOOOO|// Harald Koenig, \/\/\/\/\/\/\/\/\/ Inst.f.Theoret.Astrophysik // / \\ \ koenig@tat.physik.uni-tuebingen.de ^^^^^ ^^^^^
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