ATOMIC TIME COUNTER SYNCHRONIZATION

摘要

Methods, integrated circuit devices, and fabrication processes relating to synchronization of master and local timestamp counters (TSCs) are described. One method includes sending, to a memory bus, in response to an event that desynchronizes a master and a local TSC, a bus-lock command to perform atomic reading from a first memory location and atomic writing to a second memory location; reading a master timestamp from the master TSC via the first memory location; writing a local timestamp to the local TSC via the second memory location, to synchronize the local TSC with the master TSC; and sending, to the memory bus, a bus-unlock command; wherein the master TSC is memory mapped to the first memory location and the local TSC is memory mapped to the second memory location.

主权项

1. A method, comprising:
sending to a memory bus, in response to an event that desynchronizes a master timestamp counter (TSC) and a local TSC, a bus-lock command to perform atomic reading from a first memory location and atomic writing to a second memory location; reading a master timestamp from the master TSC via the first memory location; writing a local timestamp to the local TSC via the second memory location, to synchronize the local TSC with the master TSC; and sending, to the memory bus, a bus-unlock command; wherein the master TSC is memory mapped to the first memory location and the local TSC is memory mapped to the second memory location.