Power shifting in multicore platforms by varying SMT levels
First Claim
1. A method for managing power consumption in a microprocessor platform, the method comprising:
- setting a peak power level for power consumed by a multi-core microprocessor platform executing multi-threaded applications, the multi-core microprocessor platform comprising a plurality of physical cores, each physical core configurable into a plurality of logical cores; and
adjusting a simultaneous multithreading level in at least one physical core by changing a number of logical cores on that physical core in response to a power consumption level of the multi-core microprocessor platform exceeding the peak power level by;
using a power consumption curve of multi-threaded application execution time versus power consumption and a performance curve of level of multi-threading versus amount of speedup in multi-threaded application execution for each physical core to select at least one of one or more physical cores from which power consumption can be taken by decreasing multithreading levels while maintaining performance levels thereby decreasing power allocated to physical cores with decreased multithreading levels and one or more physical cores to which power can be shifted to increase multithreading levels to achieve a highest increase in performance level by increasing the number of logical cores; and
adjusting the simultaneous multithreading level in the selected physical cores to achieve a desired power savings and to maximize performance of the multi-core microprocessor platform in executing multi-threaded applications.
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Accused Products
Abstract
Power consumption in a microprocessor platform is managed by setting a peak power level for power consumed by a multi-core microprocessor platform executing multi-threaded applications. The multi-core microprocessor platform contains a plurality of physical cores, and each physical core is configurable into a plurality of logical cores. A simultaneous multithreading level in at least one physical core is adjusted by changing the number of logical cores on that physical core in response to a power consumption level of the multi-core microprocessor platform exceeding the peak power level. Performance and power data based on simultaneous multi-threading levels are used in selecting the physical core to be adjusted.
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Citations
20 Claims
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1. A method for managing power consumption in a microprocessor platform, the method comprising:
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setting a peak power level for power consumed by a multi-core microprocessor platform executing multi-threaded applications, the multi-core microprocessor platform comprising a plurality of physical cores, each physical core configurable into a plurality of logical cores; and adjusting a simultaneous multithreading level in at least one physical core by changing a number of logical cores on that physical core in response to a power consumption level of the multi-core microprocessor platform exceeding the peak power level by; using a power consumption curve of multi-threaded application execution time versus power consumption and a performance curve of level of multi-threading versus amount of speedup in multi-threaded application execution for each physical core to select at least one of one or more physical cores from which power consumption can be taken by decreasing multithreading levels while maintaining performance levels thereby decreasing power allocated to physical cores with decreased multithreading levels and one or more physical cores to which power can be shifted to increase multithreading levels to achieve a highest increase in performance level by increasing the number of logical cores; and adjusting the simultaneous multithreading level in the selected physical cores to achieve a desired power savings and to maximize performance of the multi-core microprocessor platform in executing multi-threaded applications. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for managing power consumption in a microprocessor platform, the method comprising:
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setting a peak power level for power consumed by a multi-core microprocessor platform executing multi-threaded applications, the multi-core microprocessor platform comprising a plurality of physical cores, each physical core configurable into a plurality of logical cores; and adjusting a simultaneous multithreading level in at least one physical core by changing a number of logical cores on that physical core in response to a power consumption level of the multi-core microprocessor platform exceeding the peak power level by; arranging the plurality of physical cores into a plurality of bins, each bin comprising a subset of the plurality of physical cores, each physical core in a given bin having a common power consumption curve of multi-threaded application execution time versus power consumption and a common performance curve of level of multi-threading versus amount of speedup in multi-threaded application execution for a given adjustment of multi-threading level; selecting at least one bin from the plurality of bins, the selected bins comprising at least one of physical cores from which power consumption can be taken by decreasing multithreading levels while maintaining performance levels thereby decreasing power allocated to physical cores with decreased multithreading levels and physical cores to which power can be shifted to increase multithreading levels to achieve a highest increase in performance level by increasing the number of logical cores; and adjusting simultaneous multi-threading levels for all physical cores in each selected bin.
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15. A non-transitory computer-readable storage medium containing a computer-readable code that when read by a computer causes the computer to perform a method for managing power consumption in a microprocessor platform, the method comprising:
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setting a peak power level for power consumed by a multi-core microprocessor platform executing multi-threaded applications, the multi-core microprocessor platform comprising a plurality of physical cores, each physical core configurable into a plurality of logical cores; and adjusting a simultaneous multithreading level in at least one physical core by changing a number of logical cores on that physical core in response to a power consumption level of the multi-core microprocessor platform exceeding the peak power level by; using a power consumption curve of multi-threaded application execution time versus power consumption and a performance curve of level of multi-threading versus amount of speedup in multi-threaded application execution for each physical core to select at least one of one or more physical cores from which power consumption can be taken by decreasing multithreading levels while maintaining performance levels thereby decreasing power allocated to physical cores with decreased multithreading levels and one or more physical cores to which power can be shifted to increase multithreading levels to achieve a highest increase in performance level by increasing the number of logical cores; and adjusting the simultaneous multithreading level in the selected physical cores to achieve a desired power savings and to maximize performance of the multi-core microprocessor platform in executing multi-threaded applications. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification