Shared memory access in a distributed system
Shared memory access in a distributed system, including: receiving a memory access request associated with a time value; determining, based on the time value, an entry in a translation lookaside buffer (TLB); and determining, based on the entry, whether to allow the memory access request.
1. A method, comprising:
receiving, by a memory management unit (MMU), a memory access request associated with a time value;
determining, based on the time value, an entry in a translation lookaside buffer (TLB); and
determining, based on the entry, whether to allow the memory access request.
2. The method of claim 1 , wherein the MMU implements the TLB.
3. The method of claim 1 , wherein determining whether to allow the memory access request is further based on a virtual address in the entry.
4. The method of claim 1 , wherein determining whether to allow the memory access request is further based on an address space identifier in the entry.
5. The method of claim 1 , wherein the TLB comprises a plurality of entries indicating, for each node of a plurality of nodes, one or more memory access permissions.
6. The method of claim 5 , wherein the plurality of nodes comprise a plurality of nodes of a distributed automation computing system of an autonomous vehicle.
7. The method of claim 1 , wherein the time value is based on a clock signal synchronized between the plurality of nodes.
8. An apparatus configured to perform steps comprising:
receiving, by a memory management unit (MMU), a memory access request associated with a time value;
determining, based on the time value, an entry in a translation lookaside buffer (TLB); and
determining, based on the entry, whether to allow the memory access request.
9. The apparatus of claim 8 , wherein the MMU implements the TLB.
10. The apparatus of claim 8 , wherein determining whether to allow the memory access request is further based on a virtual address in the entry.
11. The apparatus of claim 8 , wherein determining whether to allow the memory access request is further based on an address space identifier in the entry.
12. The apparatus of claim 8 , wherein the TLB comprises a plurality of entries indicating, for each node of a plurality of nodes, one or more memory access permissions.
13. The apparatus of claim 12 , wherein the plurality of nodes comprise a plurality of nodes of a distributed automation computing system of an autonomous vehicle.
14. The apparatus of claim 8 , wherein the time value is based on a clock signal synchronized between the plurality of nodes.
15. A memory management unit (MMU) configured to perform steps comprising:
receiving a memory access request associated with a time value;
determining, based on the time value, an entry in a translation lookaside buffer (TLB), wherein the TLB comprises a plurality of entries indicating, for each node of a plurality of nodes, one or more memory access permissions; and
determining, based on the entry, whether to allow the memory access request.
16. The MMU of claim 15 , wherein determining whether to allow the memory access request is further based on a virtual address in the entry.
17. The MMU of claim 15 , wherein determining whether to allow the memory access request is further based on an address space identifier in the entry.