Re: [sc-users] Allocating large memsize (in server.options)

[Josh Parmenter <josh@xxxxxxxxxxxxxxxxx>]

it would mean it is allocated dynamically and should just cause a failed allocation (rather then a crash). Also - DelayL (and their ilk) round up to the next power of two. Allocating otherwise doesn't (I believe).

Josh

On Sep 22, 2010, at 7:18 PM, e deleflie wrote:

> James,
> 
>> Whoa... IMO, If you're using that much real-time memory, it would be better
>> for you to switch some processing to hand-allocated buffers (e.g., BufDelay
>> instead of Delay, pass a bufnum for FFT instead of LocalBuf).
> 
> you mean use BufDelayL instead of DelayL? ... I could do that easily.
> But I dont understand how that could mean less memory is allocated..
> 
> Etienne
> 
>> Real-time
>> memory for delays and FFT localbufs is a convenience, but (again IMO) is not
>> meant to be a general memory management strategy.
>> 
>> 32-bit processes have a maximum 4 GB of addressable memory. Some of that
>> address space is reserved for operating system needs -- I'm not sure how
>> much that is in OSX. I remember from troubleshooting Windows memory issues
>> in my old job that Windows keeps 2 GB for itself and gives the other 2 GB to
>> the process. If it's something similar to that in OSX, that would explain
>> the crash when trying to reserve 2 GB for real-time memory. IIRC in UNIX,
>> other running processes (including required OS processes) can cut down the
>> actual amount of address space available to a given process -- I could be
>> wrong about that though.
>> 
>> It's a tough one -- painful to re-factor your code but it might be necessary
>> since you've gone beyond the point where the convenience of automatic memory
>> management is enough.
>> 
>> What processing are you doing?
>> 
>> hjh
>> 
>> 
>> --
>> James Harkins /// dewdrop world
>> jamshark70@xxxxxxxxxxxxxxxxx
>> http://www.dewdrop-world.net
>> 
>> "Come said the Muse,
>> Sing me a song no poet has yet chanted,
>> Sing me the universal."  -- Whitman
>> 
>> blog: http://www.dewdrop-world.net/words
>> audio clips: http://www.dewdrop-world.net/audio
>> more audio: http://soundcloud.com/dewdrop_world/tracks
>> 
> 
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/* Joshua D. Parmenter
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“Every composer – at all times and in all cases – gives his own interpretation of how modern society is structured: whether actively or passively, consciously or unconsciously, he makes choices in this regard. He may be conservative or he may subject himself to continual renewal; or he may strive for a revolutionary, historical or social palingenesis." - Luigi Nono
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