Obtaining data for redundant multithreading (RMT) execution

A system comprising:

• a first processor to execute instructions of a first thread and having a first cache associated therewith;
• a second processor to execute instructions of a second thread and having a second cache associated therewith, the second thread redundant to the first thread;
• a directory coupled to the first and second caches to maintain cache coherency therebetween, wherein the directory is to allow both of the first and second caches to maintain a first cache block in an exclusive state when the first and second processors are to execute the redundant threads;
• and
• a dynamic random access memory (DRAM) coupled to the directory.