Comprehensive contention-based thread allocation and placement

A method, comprising:

• performing by one or more computing devices:
• generating a machine description for a multi-core system based at least in part on analysis of one or more performance indicators obtained from one or more machine performance counters during execution of one or more stress applications on a multi-core system;
• generating a workload description for the multi-core system based at least in part on analysis of one or more other performance indicators obtained from the one or more machine performance counters during execution of a plurality of profiling sessions of a workload on the multi-core system, wherein the workload differs from individual ones of the one or more stress applications, and wherein individual ones of the plurality of profiling sessions differ from other ones of the plurality of profiling sessions in thread placement;
• generating, for a plurality of different proposed thread placements of the multi-core system, a plurality of models of the workload according to the machine description, the workload description and respective ones of the different proposed thread placements, wherein at least a portion of the plurality of different proposed thread placements differ from thread placements of each of the plurality of profiling sessions in a number of proposed threads or respective proposed locations for execution of at least some of the proposed threads;
• and
• determining a thread allocation for the workload based on the plurality of models of the workload, wherein the thread allocation comprises a determined number of executing threads and respective locations for execution of at least some of the executing threads.

One or more non-transitory computer-accessible storage media storing program instructions that when executed on or across one or more computing devices cause the one or more computing devices to perform:

• generating a machine description for a multi-core system based at least in part on analysis of one or more performance indicators obtained from one or more machine performance counters during execution of one or more stress applications on a multi-core system;
• generating a workload description for the multi-core system based at least in part on analysis of one or more other performance indicators obtained from the one or more machine performance counters during execution of a plurality of profiling sessions of a workload on the multi-core system, wherein the workload differs from individual ones of the one or more stress applications, and wherein individual ones of the plurality of profiling sessions differ from other ones of the plurality of profiling sessions in thread placement;
• generating, for a plurality of different proposed thread placements of the multi-core system, a plurality of models of the workload according to the machine description, the workload description and respective ones of the different proposed thread placements, wherein at least a portion of the plurality of different proposed thread placements differ from thread placements of each of the plurality of profiling sessions in a number of proposed threads or respective proposed locations for execution of at least some of the proposed threads;
• and
• determining a thread allocation for the workload based on the plurality of models of the workload, wherein the thread allocation comprises a determined number of executing threads and respective locations for execution of at least some of the executing threads.

A system, comprising:

• one or more computing devices individually comprising at least one processor and memory;
• and
• a memory coupled to the one or more computing devices comprising program instructions executable by the one or more computing devices to implement a scheduler configured to:
• generate a machine description for a multi-core system based at least in part on analysis of one or more performance indicators obtained from one or more machine performance counters during execution of one or more stress applications on a multi-core system;
• generate a workload description for the multi-core system based at least in part on analysis of one or more other performance indicators obtained from the one or more machine performance counters during execution of a plurality of profiling sessions of a workload on the multi-core system, wherein the workload differs from individual ones of the one or more stress applications, and wherein individual ones of the plurality of profiling sessions differ from other ones of the plurality of profiling sessions in thread placement;
• generate, for a plurality of different proposed thread placements of the multi-core system, a plurality of models of the workload according to the machine description, the workload description and respective ones of the different proposed thread placements, wherein at least a portion of the plurality of different proposed thread placements differ from thread placements of each of the plurality of profiling sessions in a number of proposed threads or respective proposed locations for execution of at least some of the proposed threads;
• and
• determine a thread allocation for the workload based on the plurality of models of the workload, wherein the thread allocation comprises a determined number of executing threads and respective locations for execution of at least some of the executing threads.