Click Here
home features news forums classifieds faqs links search
6128 members 
Amiga Q&A /  Free for All /  Emulation /  Gaming / (Latest Posts)
Login

Nickname

Password

Lost Password?

Don't have an account yet?
Register now!

Support Amigaworld.net
Your support is needed and is appreciated as Amigaworld.net is primarily dependent upon the support of its users.
Donate

Menu
Main sections
» Home
» Features
» News
» Forums
» Classifieds
» Links
» Downloads
Extras
» OS4 Zone
» IRC Network
» AmigaWorld Radio
» Newsfeed
» Top Members
» Amiga Dealers
Information
» About Us
» FAQs
» Advertise
» Polls
» Terms of Service
» Search

IRC Channel
Server: irc.amigaworld.net
Ports: 1024,5555, 6665-6669
SSL port: 6697
Channel: #Amigaworld
Channel Policy and Guidelines

Who's Online
22 crawler(s) on-line.
 95 guest(s) on-line.
 1 member(s) on-line.


 Frank

You are an anonymous user.
Register Now!
 Frank:  3 secs ago
 pavlor:  16 mins ago
 bhabbott:  23 mins ago
 Rob:  24 mins ago
 MEGA_RJ_MICAL:  28 mins ago
 kolla:  1 hr 15 mins ago
 21stcentury:  1 hr 41 mins ago
 NutsAboutAmiga:  1 hr 44 mins ago
 VooDoo:  4 hrs 44 mins ago
 DiscreetFX:  6 hrs 30 mins ago

Internet News   Internet News : Memory Management in AmigaOS4.0 Explained
   posted by Rogue on 13-Dec-2005 21:05:03 (17836 reads)
A new article is available on os4.hyperion-entertainment.biz outlining the new and improved memory system on AmigaOS4.0. It describes the method of "slab allocators" and "object caching" that greatly reduce external memory fragmentation while keeping internal fragmentation to a guaranteed minimum and typically provides a constant-time memory allocation.

Read all about it on os4.hyperion-entertainment.biz.
    

STORYID: 2754
Related Links
· More about Internet News
· News by Rogue


Most read story about Internet News
IBM confirms POWER5 server release details

Last news about Internet News
Amiga Future issue 169 released
Printer Friendly Page  Send this Story to a Friend

Goto page ( 1 | 2 | 3 | 4 | 5 | 6 )

PosterThread
EntilZha 
Re: Memory Management in AmigaOS4.0 Explained
Posted on 22-Dec-2005 11:39:37
#101 ]
OS4 Core Developer
Joined: 27-Aug-2003
Posts: 1679
From: The Jedi Academy, Yavin 4

Quote:
'd be interested to know the precise details of how you ensure that, but I guess it'd take too long!


See my PM... actually, you were right: There is a minimum, and that's because 12.5 % is 1/8 of 100 %, i.e. if you have 8 or more buffers per slab, then you're sure to limit the internal fragmentation...


_________________
Thomas, the kernel guy

"I don't have a frigging clue. I'm norwegian" -- Ole-Egil

All opinions expressed are my own and do not necessarily represent those of Hyperion Entertainment

 Status: Offline
Profile     Report this post  
ChrisH 
Re: Memory Management in AmigaOS4.0 Explained
Posted on 22-Dec-2005 16:11:09
#102 ]
Elite Member
Joined: 30-Jan-2005
Posts: 6679
From: Unknown

OK, having looked at it in a lot more detail, I've realised that I was actually right in my original suspicion about how to calculate a family of suitable slab sizes (which keep fragmentation below 12.5%). Glad that I'm not completely thick :)

Last edited by ChrisH on 22-Dec-2005 at 06:06 PM.
Last edited by ChrisH on 22-Dec-2005 at 05:45 PM.
Last edited by ChrisH on 22-Dec-2005 at 05:21 PM.
Last edited by ChrisH on 22-Dec-2005 at 04:35 PM.
Last edited by ChrisH on 22-Dec-2005 at 04:16 PM.
Last edited by ChrisH on 22-Dec-2005 at 04:14 PM.
Last edited by ChrisH on 22-Dec-2005 at 04:13 PM.


_________________
Author of the PortablE programming language.
It is pitch black. You are likely to be eaten by a grue...

 Status: Offline
Profile     Report this post  

Goto page ( 1 | 2 | 3 | 4 | 5 | 6 )

[ home ][ about us ][ privacy ] [ forums ][ classifieds ] [ links ][ news archive ] [ link to us ][ user account ]
Copyright (C) 2000 - 2019 Amigaworld.net.
Amigaworld.net was originally founded by David Doyle