Ehm I need some information about cell and os usage :D
- Thread starter luke76
- Start date
There are 7 working SPE's in PS3's Cell processor. One is reserved for the OS which developers can't use. However, the OS can be providing functions for games, so it can still provide some functions to the game. That area is shrouded in mystery. It is also true that the OS can request time from a second SPE, but it doesn't commandeer it completely. Developers program PS3 around 6 SPEs, not 5.
This kind of information is under NDA but what we know from a reliable source is :
http://www.beyond3d.com/forum/showpost.php?p=831452&postcount=303
http://www.beyond3d.com/forum/showpost.php?p=831452&postcount=304
Note that this was the situation six months ago so things could have changed.
http://www.beyond3d.com/forum/showpost.php?p=831452&postcount=303
http://www.beyond3d.com/forum/showpost.php?p=831452&postcount=304
Note that this was the situation six months ago so things could have changed.
but it's strange beacuse in this article by ign,tell something different about use of spe in untold legends
"Similarly, we discovered that all seven SPUs will be utilized in the game for different purposes, such as water which will be handled by one SPU, particle effects that will be handled by a second SPU, three dedicated SPUs for physics calculation, etc."
http://ps3.ign.com/articles/726/726333p1.html
"Similarly, we discovered that all seven SPUs will be utilized in the game for different purposes, such as water which will be handled by one SPU, particle effects that will be handled by a second SPU, three dedicated SPUs for physics calculation, etc."
http://ps3.ign.com/articles/726/726333p1.html
Misreporting. Only 6 SPE's are available.
The cost is associated with how much audio there is going on in the first place, but the SPE's are very good at it is probably a more general answer to your question. Some devs so far have dedicated an SPE to audio for simplicity and left it at that.
But in truth, the search function can help you to answer all of these Cell-related questions you're asking here, should you still have any questions unanswered.
But in truth, the search function can help you to answer all of these Cell-related questions you're asking here, should you still have any questions unanswered.
With innerbits rumour-mongering/reporting on the 1.6 update, I think there are new questions about memory consumption.
They talk about how certain OS utilities use up xMB of memory (9MB in the case of the friends list), but is this 9MB coming out of the OS reserved RAM, or out of application memory? In other words, if a developer implements these utilties are they trading away their own RAM? Or do you get to optionally switch on or off some OS utilities and reduce the OS overhead (e.g. by not using the friends list utility would the OS memory footprint reduce and give over 9MB to the application?).
They talk about how certain OS utilities use up xMB of memory (9MB in the case of the friends list), but is this 9MB coming out of the OS reserved RAM, or out of application memory? In other words, if a developer implements these utilties are they trading away their own RAM? Or do you get to optionally switch on or off some OS utilities and reduce the OS overhead (e.g. by not using the friends list utility would the OS memory footprint reduce and give over 9MB to the application?).
I don't think someone can give you a definitive answer on this, all we know on the OS is taken from devs flirting with their NDA and I don't think the ones on this board are willing to play this game
I suppose that at the moment, the OS reserves 64MB whatever the game uses or not (60MB is about what is taken under Linux, isn't it ?), so even if you don't need services they're still loaded in the RAM. I think that's how the PSP worked initialy, but today it's different and the RAM usage was dramaticaly cut down according to Faf so I'm sure that the same will happen on the PS3.
Sure, I understand if it's an unanswerable question.
It's a pity the innerbits guys didn't prod more about it or clarify that.
You can read their rumour-mongering/reporting here:
http://www.innerbits.com/blog/
Since they talk about the developer trading off memory for these systems, I hope it's the case that devs now have the choice of altering the OS footprint based on what system utilities they implement (rather than these system utilities eating even more RAM from the application).
It's a pity the innerbits guys didn't prod more about it or clarify that.
You can read their rumour-mongering/reporting here:
http://www.innerbits.com/blog/
Since they talk about the developer trading off memory for these systems, I hope it's the case that devs now have the choice of altering the OS footprint based on what system utilities they implement (rather than these system utilities eating even more RAM from the application).
Similar threads
