Method and apparatus for tracking objects in a first memory

An apparatus for tracking a plurality of objects in a first memory, wherein the plurality of objects each comprise one or more status variables, and wherein the apparatus comprises:

• the first memory, a second memory, a first processing core, and a second processing core,
• wherein the first processing core is configured to execute one or more update threads which update the one or more status variables of changed objects of the plurality of objects, wherein the changed objects changed during a current time interval,
• wherein the second processing core is configured to execute one or more test threads which perform the steps:
• when a new time interval starts creating for each of the plurality of objects a shadow object comprising the one or more status variables;
• evaluating the one or more status variables of each of the shadow objects to determine one or more non-copied shadow objects comprising non-copied changes;
• copying the one or more non-copied shadow objects to a second memory;
• determining whether copying the one or more non-copied shadow objects was successful;
• and
• updating the one or more status variables of corresponding objects that correspond ones of the plurality of objects that correspond to ones of the one or more non-copied shadow objects that were copied successfully,
• wherein subsequent bits of the one or more status variables correspond to subsequent time intervals, and
• wherein the one or more update threads and the one or more test threads operate on disjoint sets of bits of the one or more status variables.

A non-transitory computer-readable storage medium storing program code, the program code comprising instructions that when executed by a processor cause the processor to:

• update, by one or more update threads, one or more status variables of changed objects of a plurality of objects, wherein the plurality of objects each comprise one or more status variable, and wherein the changed objects changed during a current time interval;
• create, by one or more test threads, when a new time interval starts, for each of the plurality of objects, a shadow object comprising the one or more status variables;
• evaluate, by the one or more test threads, the one or more status variables of each of the shadow objects to determine one or more non-copied shadow objects comprising non-copied changes;
• copy, by the one or more test threads, the one or more non-copied shadow objects to a second memory;
• determine, by the one or more test threads whether the step of copying the one or more non-copied shadow objects was successful;
• and
• update, by the one or more test threads, the one or more status variables of corresponding ones of the plurality of objects that correspond to ones of the one or more non-copied shadow objects that were copied successfully,
• wherein subsequent bits of the one or more status variables correspond to subsequent time intervals, and
• wherein the one or more update threads and the one or more test threads operate on disjoint sets of bits of the one or more status variables.