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Amiga computer related discussion => Amiga Software Issues and Discussion => Topic started by: AmigaMance on January 07, 2007, 06:03:40 PM

Title: Partitions and CPU usage in AmigaOS3.x (Calling all 68k devs)
Post by: AmigaMance on January 07, 2007, 06:03:40 PM

  Hi.
 I notice that every HD partition in AOS, eats an  amount of CPU cycles every 5 seconds, even if none of these partitions are accessed (Iirc, CD and DF units too). Run scout and see it for yourself if you like.
 Admitedly, this amount is tiny but could this cause a performance hit in desktops with a lot of partitions?

 I also noticed that this doesn't happen in MorphOS! (using Ambient v1.43) In this field, things works as it should in MOS: Partitions eats CPU cycles only if they are being accessed.
 Could someone write a patch to correct this behavior in AmigaOS? (Yeah, keep dreaming)
Which element of the OS is responsible for this?

Title: Re: Partitions and CPU usage in AmigaOS3.x (Calling all 68k devs)
Post by: AmigaMance on January 09, 2007, 10:06:55 AM

 Just a bump to make sure that everyone has read this thread.

Title: Re: Partitions and CPU usage in AmigaOS3.x (Calling all 68k devs)
Post by: lurkist on January 09, 2007, 12:34:38 PM

Not the reply you expected, but here (http://www.amigaforums.com/forums/viewtopic.php?t=350&highlight=&sid=2e0aeec5b7f50f30f78d6b350939ea4f) Thomas explains the memory requirements for partitions.
I used to be ELPfan in a previous incarnation!

Cheers

Title: Re: Partitions and CPU usage in AmigaOS3.x (Calling all 68k devs)
Post by: Framiga on January 09, 2007, 01:01:01 PM

are you speaking about AOS3.9? do you have many partitions hidden?

Title: Re: Partitions and CPU usage in AmigaOS3.x (Calling all 68k devs)
Post by: AmigaMance on January 09, 2007, 09:48:55 PM

@lurkist

Quote

Not the reply you expected, but here Thomas explains the memory requirements for partitions.

 Yes, not very relevant, except of this part: " Also each partition is a system task which might decrease performance a little bit." Aha...


@framiga
 Although, i don't thing what you are asking matters at all.. OS3.9, no hidden partitions.

Title: Re: Partitions and CPU usage in AmigaOS3.x (Calling all 68k devs)
Post by: lurkist on January 09, 2007, 09:53:56 PM

And this bit

"Each partition needs "Number of Buffers" * "Buffersize" bytes of memory"

describes the exact mem reqs.


And this bit

"that the FileSystem program needs"

tells you which part of the OS is responsible.

Fairly relevant, really.  ;-)