Speculative checkin of ERAT cache entries

A computer program product comprising:

• one or more processors;
• a non-transitory computer-readable storage medium having program instructions embodied therewith, the program instructions executable by the one or more processors, the program instructions including:
• setting a threshold number of free Effective to Real Address Translation (ERAT) cache entries in an ERAT cache;
• determining whether a total number of free ERAT cache entries is less than or equal to the threshold number of free ERAT cache entries;
• allocating, in response to determining that the total number of free ERAT cache entries is less than or equal to the threshold number of free ERAT cache entries, one or more active ERAT cache entries to be speculatively checked in to a memory management unit (MMU);
• and
• speculatively checking in the one or more active ERAT cache entries to the MMU.

An information handling system comprising:

• one or more processors having one or more acceleration units and one or more memory management units (MMU) wherein at least one acceleration unit has an Effective Address to Real Address Translation (ERAT) cache having a plurality of cache entries;
• the one or more processors configured and adapted to:
• set a threshold number of free ERAT cache entries in the ERAT cache;
• determine whether a total number of free ERAT cache entries is less than or equal to the threshold number of free ERAT cache entries;
• allocate, in response to determining that the total number of free ERAT cache entries is less than or equal to the threshold number of free ERAT cache entries, one or more active ERAT cache entries to be speculatively checked in to the one or more MMU;
• and
• speculatively check in the one or more active ERAT cache entries to the one or more MMU.