@Templario

There are two things to remember swap file/partition and virtual memory.

Virtual memory can reduce fragmented memory, this increases the chase of successful allocation of memory, combine lots smaller memory blocks to a larger one, and relocate the address, this should rescue the problem of fragmented memory allowing the OS to run for longer period of time whit out running in to fragmentation problems. If you have just 256mb you can use full addressable 4gb of addresses for relocation to solve fragmentation.

Swap partitions are used when you run out of physical memory, when programs normally crash or stop working, you don't need it unless you run out of memory.

Last edited by NutsAboutAmiga on 12-Dec-2011 at 02:57 PM.
Last edited by NutsAboutAmiga on 11-Dec-2011 at 04:10 PM.

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@NutsAboutAmiga

The odd bit is that if I disable virtual memory I can play Aquaria for more than an hour without seeing any issues, but if I have virtual memory enabled the game crashes with in the first 20 - 30 minutes with a DSI error.

I am informed I may run in to problems latter on in the games as the levels are to large to work on a 512MB system without virtual memory, but for now switching it off makes my computer more stable. Virtual memory does seem to work for AmigaOne owners with 512MB or ram and enable them to play latter levels in the game but on my sam440ep it just makes the game crash.

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Sam440ep 667mhz, 512MB, 120GB 2.5" HD, OS4.1FE
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@Dwyloc

Quote:

The odd bit is that if I disable virtual memory I can play Aquaria for more than an hour without seeing any issues, but if I have virtual memory enabled the game crashes with in the first 20 - 30 minutes with a DSI error.

Grits teeth: You are disabling swap not virtual memory...

That aside, start the game with VR enabled, then type memstat at the shell and see what's being used. If any pages are swapped out etc.

Then play for a while do memstat again, and compare the output. Perhaps there is amemory leek that gradually using more and more memory.

It may also be that you have something else running, that does not play well with swap and is benig forced into swap as resources are used. Does your DSI always happen in the game itsel;f or in some other component, is it consitant?

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@broadblues

Quote:

broadblues wrote: @Dwyloc Quote: The odd bit is that if I disable virtual memory I can play Aquaria for more than an hour without seeing any issues, but if I have virtual memory enabled the game crashes with in the first 20 - 30 minutes with a DSI error. Grits teeth: You are disabling swap not virtual memory... That aside, start the game with VR enabled, then type memstat at the shell and see what's being used. If any pages are swapped out etc. Then play for a while do memstat again, and compare the output. Perhaps there is amemory leek that gradually using more and more memory. It may also be that you have something else running, that does not play well with swap and is benig forced into swap as resources are used. Does your DSI always happen in the game itsel;f or in some other component, is it consitant?

I even went as far as reinstalling OS4.1 update 1 on a clean partition then installing update 2 + update 3 and I still get the same problem, I am not running anything in background not supplied with OS4.1 and setup by the OS.

The game may or may not leak ram, but I can leave it running over night with no SWAP partition on my system without it crashing but with a swap partition the game crashes when left unattended after less than an hour. Other users have reported that without SWAP enabled they run out of memory on later levels with only 512MB of RAM like found in my sam440ep.

I uploaded the DSI error in the other linked thread but here is a first part of the DSI I posted in the other thread from before I tried reinstalling OS4.1 update 3 on a clean partition:

Crash log for task "Aquaria"
Generated by GrimReaper 53.2
Crash occured in module Aquaria at address 0x6F785B8C
Type of crash: DSI (Data Storage Interrupt) exception

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Sam440ep 667mhz, 512MB, 120GB 2.5" HD, OS4.1FE
WinUae 3.0.0, OS 3.9, BB3, Catweasel MkIV
Amiga 1200, Blizzard 040/40 (BlizzardPPC 060/200 with SCSI removed at present), mediatorSX pci, Voodoo3, PCI network card os 3.9BB2
4MB Minimig with ARM addon boar

@Dwyloc

the general information s not so useful, place provide stack trace.

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@NutsAboutAmiga

It's better to use 2GB of ram if your machine can handle it and forget swap. Memory is very cheap. AmigaOS is limited to around 1.8GB of ram and having swap partitions won't increase that figure.

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@Crumb

I agree.

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@Crumb

First problem is, a SAM440ep cant handle more than 512MB physical RAM. Second problem is, a software that handles memory allocations the wrong way wont get better by restricting the system in whole.

@Dwyloc

Time to examine the reaper log and make up a patch, I would say. Had a look into the reaper log you gave over there, and it seems to be a propagating NULL pointer error. Quite typical for software using the *nix style of memory allocations without checking the returned address

I think we will see even more software crashing when the pager kicks in under certain circumstances, and I saw a lot of other software working fine even if the pager is working very hard...

Last edited by whose on 13-Dec-2011 at 01:29 AM.
Last edited by whose on 13-Dec-2011 at 01:29 AM.