Delaying execution in a processor to increase power savings
Embodiments relate to storing data in memory. An aspect includes applying a power savings technique to at least a subset of a processor. Pending work items scheduled to be executed by the processor are monitored. The pending work items are grouped based on the power savings technique. The grouping includes delaying a scheduled execution time of at least one of the pending work items to increase an overall number of clock cycles that the power savings technique is applied to the processor. It is determined that an execution criteria has been met. The pending work items are executed based on the execution criteria being met and the grouping.
1. A computer implemented method comprising:
applying a power savings technique to at least a subset of a processor;
monitoring pending work items scheduled to be executed by the processor;
grouping the pending work items based on the power savings technique, the grouping including delaying a scheduled execution time of at least one of the pending work items to increase an overall number of clock cycles that the power savings technique is applied to the processor;
determining that an execution criteria has been met; and
executing the pending work items based on the execution criteria being met and the grouping, wherein:
the power savings technique is transparent clock gating (TCG),
the pending work items include data to be inserted into a pipeline,
the grouping results in an idle clock cycle being inserted between two of the pending work items,
the executing is by an execution unit on the processor,
the power savings technique is applied to the pipeline, and
the execution criteria includes receiving a specified number of pending work items.
2. The method of claim 1 , further comprising deactivating the power savings technique based on the execution criteria being met.
3. The method of claim 1 , wherein the at least one of the pending work items is a non-critical pending work item.
4. A system comprising a processor, the system configured to perform a method comprising:
applying a power savings technique to at least a subset of a processor;
monitoring pending work items scheduled to be executed by the processor;
grouping the pending work items based on the power savings technique, the grouping including delaying a scheduled execution time of at least one of the pending work items to increase an overall number of clock cycles that the power savings technique is applied to the processor;
determining that an execution criteria has been met; and
executing the pending work items based on the execution criteria being met and the grouping, wherein:
the power savings technique is transparent clock gating (TCG),
the pending work items include data to be inserted into a pipeline,
the grouping results in an idle clock cycle being inserted between two of the pending work items,
the executing is by an execution unit on the processor,
the power savings technique is applied to the pipeline, and
the execution criteria includes receiving a specified number of pending work items.
5. The system of claim 4 , wherein the system is further configured to deactivate the power savings technique based on the execution criteria being met.
6. The system of claim 4 , wherein the at least one of the pending work items is a non-critical pending work item.
7. A computer program product comprising:
a computer readable storage medium having program instructions embodied therewith, the program instructions readable by a processing circuit to cause the processing circuit to perform a method comprising:
applying a power savings technique to at least a subset of a processor;
monitoring pending work items scheduled to be executed by the processor;
grouping the pending work items based on the power savings technique, the grouping including delaying a scheduled execution time of at least one of the pending work items to increase an overall number of clock cycles that the power savings technique is applied to the processor;
determining that an execution criteria has been met; and
executing the pending work items based on the execution criteria being met and the grouping, wherein:
the power savings technique is transparent clock gating (TCG),
the pending work items include data to be inserted into a pipeline,
the grouping results in an idle clock cycle being inserted between two of the pending work items,
the executing is by an execution unit on the processor,
the power savings technique is applied to the pipeline, and
the execution criteria includes receiving a specified number of pending work items.
8. The computer program product of claim 7 , wherein the program instructions further cause the processing circuit to deactivate the power savings based on the execution criteria being met.
9. The computer program product of claim 7 , wherein the at least one of the pending work items is a non-critical pending work item.