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From: mhx@iae.nl (mhx)
Newsgroups: comp.lang.forth
Subject: Re: Memory =?UTF-8?B?dHJhc2hpbmc/IFZpcnR1YWwgbWVtb3J5IHF1ZXN0aW9uLg==?=
Date: Mon, 30 Sep 2024 15:21:57 +0000
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On Mon, 30 Sep 2024 9:53:32 +0000, albert@spenarnc.xs4all.nl wrote:

I played around with it some more on Windows 11.

FORTH> .TICKER-INFO
AMD Ryzen 7 5800X 8-Core Processor, timer & PROCESSOR-CLOCK of 4192MHz
Peak WorkingSetSize    = 650 kB
Current WorkingSetSize = 631 kB
Total memory size      = 31 GB
Available memory size  = 16 GB
 ok
FORTH> 0 VALUE am1  ok
FORTH> TIMER-RESET   #2000000000 ALLOCATE ?ALLOCATE TO am1  .ELAPSED 
am1 FREE ?ALLOCATE 0.215 seconds elapsed. ok

FORTH> TIMER-RESET   #2000000000 ALLOCATE ?ALLOCATE TO am1  .ELAPSED 
am1 FREE ?ALLOCATE 0.155 seconds elapsed. ok

Faster the second time.

FORTH> TIMER-RESET   #8000000000 ALLOCATE ?ALLOCATE TO am1  .ELAPSED 
am1 FREE ?ALLOCATE 0.902 seconds elapsed. ok

FORTH> TIMER-RESET   #8000000000 ALLOCATE ?ALLOCATE TO am1  .ELAPSED 
am1 FREE ?ALLOCATE 0.616 seconds elapsed. ok

FORTH> TIMER-RESET   #8000000000 ALLOCATE ?ALLOCATE TO am1  .ELAPSED 
am1 FREE ?ALLOCATE 0.583 seconds elapsed. ok

FORTH> TIMER-RESET   #8000000000 ALLOCATE ?ALLOCATE TO am1  .ELAPSED 
am1 FREE ?ALLOCATE 0.586 seconds elapsed. ok

With 8 GB the OS apparently is busy in the background and takes 4x as
long, a linear increase.

FORTH> TIMER-RESET   #1000000000 ALLOCATE ?ALLOCATE TO am1  .ELAPSED 
am1 FREE ?ALLOCATE 0.076 seconds elapsed. ok

If we go back to 1 GB the memory/diskspace is apparently pooled.

FORTH> TIMER-RESET   #12000000000 ALLOCATE ?ALLOCATE TO am1  .ELAPSED 
am1 FREE ?ALLOCATE 1.120 seconds elapsed. ok

The timing suggests that the pool is increased, not build from 0.

FORTH> TIMER-RESET   #12000000000 ALLOCATE ?ALLOCATE TO am1  .ELAPSED 
am1 FREE ?ALLOCATE 0.908 seconds elapsed. ok
FORTH> TIMER-RESET   #12000000000 ALLOCATE ?ALLOCATE TO am1  .ELAPSED 
am1 FREE ?ALLOCATE 0.881 seconds elapsed. ok

FORTH> TIMER-RESET   #12000000000 ALLOCATE ?ALLOCATE TO am1  .ELAPSED 
am1 FREE ?ALLOCATE 0.883 seconds elapsed. ok

FORTH> .TICKER-INFO
AMD Ryzen 7 5800X 8-Core Processor, timer & PROCESSOR-CLOCK of 4192MHz
Peak WorkingSetSize    = 12075 kB
Current WorkingSetSize = 631 kB
Total memory size      = 31 GB
Available memory size  = 16 GB

The WorkingSetSize reflects the program's size + allocated memory.
AFAIR, this was a lot worse a few years ago.
Mysteriously, available memory size is still 16 GB.

-marcel