摘要:
A mechanism is described for facilitating faster suspend/resume operations in computing systems according to one embodiment of the invention. A method of embodiments of the invention includes initiating an entrance process into a first sleep state in response to a sleep call at a computing system, transforming from the first sleep state to a second sleep state. The transforming may include preserving at least a portion of processor context at a local memory associated with one or more processor cores of a processor at the computing system. The method may further include entering the second sleep state.
摘要:
A mechanism is described for facilitating faster suspend/resume operations in computing systems according to one embodiment of the invention. A method of embodiments of the invention includes initiating an entrance process into a first sleep state in response to a sleep call at a computing system, transforming from the first sleep state to a second sleep state. The transforming may include preserving at least a portion of processor context at a local memory associated with one or more processor cores of a processor at the computing system. The method may further include entering the second sleep state.
摘要:
In one embodiment, a processor includes a core with a front end unit, at least one execution unit, and a back end unit. Multiple voltage drop detectors can be located within the core each to output a voltage drop signal when a detected voltage falls below a threshold voltage. In turn, a current transient logic coupled to receive the voltage drop signals can control a micro-architectural parameter of at least one of the front end unit, execution unit and back end unit responsive to receipt of a voltage drop signal. Other embodiments are described and claimed.
摘要:
In one embodiment, a processor includes a core with a front end unit, at least one execution unit, and a back end unit. Multiple voltage drop detectors can be located within the core each to output a voltage drop signal when a detected voltage falls below a threshold voltage. In turn, a current transient logic coupled to receive the voltage drop signals can control a micro-architectural parameter of at least one of the front end unit, execution unit and back end unit responsive to receipt of a voltage drop signal. Other embodiments are described and claimed.
摘要:
An apparatus, method and system is described herein for thread consolidation. Current processor utilization is determined. And consolidation opportunities are identified from the processor utilization and other exaction parameters, such as estimating a new utilization after consolidation, determining if power savings would occur based on the new utilization, and performing migration/consolidation of threads to a subset of active processing elements. Once the consolidation is performed, the non-subset processing elements that are now idle are powered down to save energy and provide an energy efficient execution environment.
摘要:
A processor may include power management techniques to, dynamically, chose an optimal C-state for the processing core. The measurement of real workloads on the OSes exhibit two important observations (1) the bursts of high interrupt rate are interspersed between the low interrupt rate periods and long periods of high activity levels; and (2) the interrupt rate may, suddenly, fall below an interrupt rate (of 1 milli-second, for example) that is typical of the current operating systems (OS). Instead of determining the C-state based on the stale data stored in the counters, the power control logic may determine an optimal C-state by overriding the C-state determined by the OS or any other power monitoring logic. The power control logic may, dynamically, determine an optimal C-state based on the CPU idle residency times and variable rate wakeup events to match the expected wakeup event rate.
摘要:
A processor may include power management techniques to, dynamically, chose an optimal C-state for the processing core. The measurement of real workloads on the OSes exhibit two important observations (1) the bursts of high interrupt rate are interspersed between the low interrupt rate periods and long periods of high activity levels; and (2) the interrupt rate may, suddenly, fall below an interrupt rate (of 1 milli-second, for example) that is typical of the current operating systems (OS). Instead of determining the C-state based on the stale data stored in the counters, the power control logic may determine an optimal C-state by overriding the C-state determined by the OS or any other power monitoring logic. The power control logic may, dynamically, determine an optimal C-state based on the CPU idle residency times and variable rate wakeup events to match the expected wakeup event rate.
摘要:
Methods and apparatus to optimize package level power state usage are described. In one embodiment, a processor control logic receives a request to enter a lower power consumption state (such as a package level deeper sleep state). The control logic determines the time difference or delta between a last entry into the lower power consumption state and the current time. The control logic then causes the flushing of a last level cache based on a comparison of the time difference and a threshold value corresponding to the lower power consumption state. Other embodiments are also claimed and disclosed.
摘要:
A processor may include power management techniques to, dynamically, chose an optimal C-state for the processing core. The measurement of real workloads on the OSes exhibit two important observations (1) the bursts of high interrupt rate are interspersed between the low interrupt rate periods and long periods of high activity levels; and (2) the interrupt rate may, suddenly, fall below an interrupt rate (of 1 milli-second, for example) that is typical of the current operating systems (OS). Instead of determining the C-state based on the stale data stored in the counters, the power control logic may determine an optimal C-state by overriding the C-state determined by the OS or any other power monitoring logic. The power control logic may, dynamically, determine an optimal C-state based on the CPU idle residency times and variable rate wakeup events to match the expected wakeup event rate.
摘要:
A processor may include power management techniques to, dynamically, chose an optimal C-state for the processing core. The measurement of real workloads on the OSes exhibit two important observations (1) the bursts of high interrupt rate are interspersed between the low interrupt rate periods and long periods of high activity levels; and (2) the interrupt rate may, suddenly, fall below an interrupt rate (of 1 milli-second, for example) that is typical of the current operating systems (OS). Instead of determining the C-state based on the stale data stored in the counters, the power control logic may determine an optimal C-state by overriding the C-state determined by the OS or any other power monitoring logic. The power control logic may, dynamically, determine an optimal C-state based on the CPU idle residency times and variable rate wakeup events to match the expected wakeup event rate.