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NextPerception
Member
Joined: 08 Sep 2003
Posts: 203
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 Posted: 04 Nov 2003 09:37:37 pm Post subject: |
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| with the huge archive that the ti83+ silver edition has does it take longer to garbage collect? |
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Matt
Member
Joined: 11 Jun 2003
Posts: 169
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| Posted: 04 Nov 2003 09:43:20 pm Post subject: |
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| I wouldn't think so. Does anybody have any information? |
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b__
Member
Joined: 16 Jun 2003
Posts: 173
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| Posted: 04 Nov 2003 09:51:42 pm Post subject: |
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| It takes about 10 seconds. |
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Darth Android
DragonOS Dev Team
Bandwidth Hog
Joined: 31 May 2003
Posts: 2104
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| Posted: 04 Nov 2003 11:45:50 pm Post subject: |
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| the normal 83+ takes longer than that! mine 83+ takes about 25-30 |
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Glen
Prokul Interactive
Advanced Newbie
Joined: 20 May 2003
Posts: 59
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| Posted: 05 Nov 2003 02:40:22 am Post subject: |
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| just wondering, how come sometimes it collects garbage and sometimes it doesnt? |
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AlienCC
Creative Receptacle!
Know-It-All
Joined: 24 May 2003
Posts: 1927
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| Posted: 05 Nov 2003 07:20:15 am Post subject: |
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Garbage collection in flash memory is useful for re-allocating where programs are stored so that you don't have fragmented freespace. This is essential if you want to make use of all or most of your free space with programs. Without the garbage collection you could have as much as 100KB free all in 2KB chunks making it impossible to load a 4KB program into your flash memory. In computer terms the process is essentially the same as defragmenting your harddrive.
The more you write to and delete from flash memory, the more frequent you will have to garbage collect. Which brings up another problem with shells that copy a program out of flash memory so you can write your game scores, etc. to it, then rewrite the program back into flash memory, they cannot guarantee its going to be written back in the same spot in flash memory, which then brings about the garbage collection process more frequently.
--AlienCC |
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Jeremiah Walgren
General Operations Director
Know-It-All
Joined: 24 May 2003
Posts: 1937
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| Posted: 05 Nov 2003 12:05:50 pm Post subject: |
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Also, flash memory can only be rewritten for a limited amount of times. I think 100,000 is the minimum. I can't remember correctly, but I believe that 100,000 Garbage Collects would be 25 times a day for 10 years. Can anyone check me on that?
To kind of offer my own input. When you put something in archive it writes it to the flash rom chip. As long as you don't take it out or whatever, you'll be fine. But unarchive it or delete, it's merely marked as that. Deleting phoenix doesn't actually do that. It just marks it as deleted. When garbage collecting, the calculator goes through the memory and removes whatever has been marked deleted, for example, and shoves everything up front leaving the open memory nice, clean, and big. |
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NETWizz
Byte by bit
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Joined: 20 May 2003
Posts: 2369
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| Posted: 05 Nov 2003 01:21:56 pm Post subject: |
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| They are rated by AMD the chip manufacuer at 2 million erasures, but TI rates them at only 200,000. Either way, your calculator will last longer than you need it. |
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Darth Android
DragonOS Dev Team
Bandwidth Hog
Joined: 31 May 2003
Posts: 2104
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| Posted: 05 Nov 2003 02:28:58 pm Post subject: |
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Jbirk wrote: Either way, your calculator will last longer than you need it.
i guess this is all that matters really, huh? |
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X1011
10100111001
Active Member
Joined: 14 Nov 2003
Posts: 657
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| Posted: 15 Nov 2003 06:50:51 pm Post subject: |
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b__ wrote: It takes about 10 seconds.
Quote: the normal 83+ takes longer than that! mine 83+ takes about 25-30
It isn't a fixed time, the more garbage collecting it has to do, the more time it takes. |
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Adm.Wiggin
aka Tianon
Know-It-All
Joined: 02 Jun 2003
Posts: 1874
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| Posted: 15 Nov 2003 07:26:19 pm Post subject: |
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X1011 wrote: It isn't a fixed time, the more garbage collecting it has to do, the more time it takes.
hehe, that sounds kind of funny, but it is really true... i hope you dont mind if i rephrase it slightly here : Quote: If you have more stuff stored, then it will take longer to do a garbage collect is that any better? or am i just making a fool of myself (again...) |
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DarkerLine
ceci n'est pas une |
Super Elite (Last Title)
Joined: 04 Nov 2003
Posts: 8328
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| Posted: 15 Nov 2003 09:07:21 pm Post subject: |
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| I thought that it had to garbage collect after a certain amount of programs being run - the more programs you've run since the last garbage collect the more time it takes. I don't really know though, this is just the idea I got 4 years ago after reading the manual. |
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Darth Android
DragonOS Dev Team
Bandwidth Hog
Joined: 31 May 2003
Posts: 2104
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| Posted: 15 Nov 2003 09:20:56 pm Post subject: |
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not run. archived/unarchived
see:
when you un archive a program, it marks it for deletion, but doesnt delete it
when you archive something, it checks if there is a continuous string of free archive, and if not garbase collects, deleting anything marked for deletion and moving all free space to the end in one long string.
then it archives.
the more data it has to move to $8000-$8100 then back to archive, the longer it takes. |
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Open Topic & United-TI Talk => General Open Topic
