Identifying stale entries in address translation cache
AssigneeInternational Business Machines Corporation
InventorsVinod Bussa, Manoj Dusanapudi, Shakti Kapoor
Life of this patent
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Abstract
A mapping may be changed in a table stored in memory. The table may map a first set of addresses, for a set of data, to a second set of addresses. The changing of the mapping may including mapping the first set of addresses to a third set of addresses. In response to the changing of the mapping, one or more flush operations may be executed to invalidate one or more entries within one or more address translation caches. The one or more entries may include the second set of addresses. In response to the executing of the one or more flush operations, a first test case may be run. The first test case may be to test whether any of the first set of addresses are mapping to the second set of addresses.
Claims14
A computer-implemented method comprising:
- mapping a first set of addresses to a second set of addresses in a memory;
- changing the mapping by mapping the first set of addresses to a third set of addresses;
- executing, in response to the changing of the mapping, one or more operations to invalidate one or more entries within one or more address translation caches, the one or more entries including at least one of the second set of addresses;
- and
- running a first test case, the first test case tests whether any of the first set of addresses are mapping to the second set of addresses.
A system for identifying stale entries within an address translation cache, the system comprising:
- a computing device having at least one processor;
- and
- a computer readable storage medium having program instructions embodied therewith, the program instructions executable by the processor to cause the system to:
- execute, in response to a changing of mapping in a table from a second set of addresses to a third addresses, one or more flush operations to invalidate one or more entries within one or more address translation caches, the one or more entries including a second set of addresses;
- and
- run, in response to the executing of the one or more flush operations, a first test case, the first test case to test whether any of a first set of addresses are mapping to at least one of the second set of addresses.
Dependencies are inferred from the claim text.