On Sep 13, 2011, at 10:30 AM, Scott Ribe wrote:
> - Is that 1GB matrix static & unchanging, read-only? If so, you might be able >to use shared memory between the processes to avoid loading it more than once. The shared memory approach might work (I assume you mean with shm_open(), mmap(), shmget(), shmat(), etc.?) But isn't there a problem with the shm mechanism on multiprocessor hardware, or was that from years past? Also, won't I need to increase shmmax in the kernel, especially if I have numerous "flavors" of the 1GB matrix to load? ________________________________ From: Scott Ribe <scott_r...@elevated-dev.com> To: Jon Sigman <rf_...@yahoo.com> Cc: Cocoa- Dev List <cocoa-dev@lists.apple.com> Sent: Tuesday, September 13, 2011 10:30 AM Subject: Re: Task dispatching On Sep 13, 2011, at 11:11 AM, Jon Sigman wrote: > Startup involves loading a >1GB data matrix from disk into memory. > Transformations are then done using this matrix on the 1MB data blocks that > are sent in via TCP/IP. That's why I can't simply start new tasks on-demand, > the startup time is prohibitive so that complicates things. The first option > (multiple processes) seems more robust but also harder to implement. Are > there any design guidelines for implementing a "server" in Cocoa? - Is that 1GB matrix static & unchanging, read-only? If so, you might be able to use shared memory between the processes to avoid loading it more than once. - A couple of minutes still seems like a long time to load it. Perhaps there is a more efficient way to store & load it? You can probably find some basic sample code for a Cocoa server online, but much of what you need to do here is going to be at a lower level. -- Scott Ribe scott_r...@elevated-dev.com http://www.elevated-dev.com/ (303) 722-0567 voice _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
