Cache system for concurrent processes

A computer system comprising:

• a processor for executing a plurality of processes wherein each process includes a sequence of instructions, the processor including a process status store which holds a partition indicator for a current process which is currently being executed;
• a main memory;
• a cache memory having a set of cache partitions, each cache partition comprising a plurality of addressable storage locations for holding items fetched from said main memory for use by the processor in execution of its processes;
• and
• a cache refill mechanism arranged to fetch an item from the main memory and to load said item into the cache memory at one of said addressable storage locations, wherein the cache refill mechanism selects said one of said addressable storage locations for loading said items in dependence on the partition indicator held in the process status store in association with the current process.