Monitoring thread synchronization in a distributed cache

摘要

Systems, apparatus, and method of monitoring synchronization in a distributed cache are described. In an exemplary embodiment, a first and second processing core process a first and second thread respectively. A first and second distributed cache slices store data for either or both of the first and second processing cores. A first and second core interface co-located with the first and second processing cores respectively maintain a finite state machine (FSM) to be executed in response to receiving a request from a thread of its co-located processing core to monitor a cache line in the distributed cache.

主权项

1. An apparatus comprising:
a first and second processing core, wherein the first and second processing cores to each process a first and second thread respectively; a first and second distributed cache slice to store data for either or both of the first and second processing cores; and a first and second core interface co-located with the first and second processing cores respectively, each core interface to maintain a finite state machine (FSM) to be executed in response to receiving a request from a thread of its co-located processing core to monitor a cache line in the distributed cache, wherein the FSM comprises:
a wait state to record a request from a co-located core's thread to monitor a specific cache line,a monitor state to monitor for a pseudo-snoop of the cache line being monitored, wherein the pseudo-snoop activates the FSM, but is not sent to the core that requested the monitoring of the cache line, andan information state to send a wakeup event to the thread that requested the monitoring of the cache line.