Is it possible to allocate, in user space, a non cacheable block of memory on Linux?

Question

I have a bunch of buffers (25 to 30 of them) in my application that are are fairly large (.5mb) and accessed simulataneousley. To make it even worse the data in them is gene

Answer 1

On certain processor architectures, there are special instructions that can be used to mark certain cache-lines as disabled. However, these are usually architecture specific and depend on some assembly instruction. So, I would advise you to refer to the processor architecture documentation and figure out how to do it in assembly. You can then use inline assembly with GCC to activate it. It would make performance suck though.

PS: If you can, you may want to think of a different way to handle the data?