CPU benchmark fully Open Source to supplant the older test like SuperPI. It will use the MMX,SSE,SSE2,SSE3 and later istructions to make the tests more real.
Open Control Block (or Open Context Block) -- a block of data established by a resource manager during its handling of the client's open() function. This context block is bound by the resource manager to this particular request, and is then automatically passed to all subsequent I/O functions generated by the client on the file descriptor returned by the client's open().