Method and system for handling queue overflow during in-cache garbage collection

A system for managing queue overflow in an in-cache garbage collection process carried out in a multi-processor environment, comprising:

• an object cache having a broadcast queue;
• a register associated with the object cache, each bit of the register identifying a portion of the object cache;
• a controller for managing the object cache, the controller being configured such that an overflow of the broadcast queue causes the controller to set a bit in the register, the set bit identifying the portion of the object cache that includes an object that was identified as live but not processed due to the overflow of the broadcast queue;
• and
• a processor configured to use set bits in the register to limit rescanning to only the portions of the object cache that include live but unprocessed objects.

A method for handling queue overflow in an in-cache garbage collection process carried out in a multi-processor environment, comprising:

• scanning one or more object caches;
• broadcasting references for live objects found in the one or more object caches;
• storing the references in particular broadcast queues, such that references to objects found in one object cache are stored in a respective broadcast queue;
• if an overflow of any one of the broadcast queues occurs, setting a bit in overflow partition bits associated with a respective object cache and broadcast queue;
• and
• after the one or more object caches have been scanned once, rescanning only selected portions of the one or more object caches that include references that were marked but not processed, the selected portions of the one or more object caches being identified by set bits in the overflow partition bits associated with each respective object cache and broadcast queue.

A system for managing queue overflow in an in-cache garbage collection process carried out in a multi-processor environment, comprising:

• an object cache having a broadcast queue;
• overflow partition bits associated with the object cache, each bit in the overflow partition bits identifying a portion of the object cache;
• and
• a controller for managing the object cache, the controller being configured such that an overflow of the broadcast queue causes the controller to set a bit in the overflow partition bits, the set bit identifying the portion of the object cache that includes an object that was marked but not processed due to the overflow of the broadcast queue;
• and
• a processor configured to use the set bits to limit rescanning to only the portions of the object cache that include marked but unprocessed objects.