In your model, the page table entry is address DIV page-size the offset is address MOD page-size I don’t know if your addresses are hex or decimal. I will assume hex. For your first example–20 page table entry = 0 page offset = 20 Your page table entry 0 maps to page frame 2 = … Read more
You are mixing metaphors. First, sprinkle around some NSLog messages reporting on the object type, before saving then on retrieval (NSStringFromClass[obj class]). You did not make it clear if you are using a C based SQLite interface or Core Data with a SQLite backing store, so update your question. Lastly, if you message an object … Read more
I don’t know for sure if this is your problem, but there is a huge design flaw with your current code. You are creating 1 thread per image. Assuming that you have hundreds or thousands of threads this design cannot scale. For a start there is a significant overhead associated with creating, starting and terminating … Read more
The stack is the memory set aside as scratch space for a thread of execution. When a function is called, a block is reserved on the top of the stack for local variables and some bookkeeping data. When that function returns, the block becomes unused and can be used the next time a function is … Read more