摘要:
A method is provided for a data processing system configured to include multiple logical partitions, wherein resources of the system are selectively allocated among respective partitions. In the method, an entity such as a Partition Load Manager or a separate background process is used to manage resources based on locality levels. The method includes the step of evaluating the allocation of resources to each of the partitions at a particular time, in order to select a partition having at least one resource considered to be of low desirability due to its level of locality with respect to the selected partition. The method further comprises identifying each of the other partitions that has a resource matching the resource of low desirability, and determining the overall benefit to the system that would result from trading the resource of low desirability for the matching resource of each of the identified partitions. Resources are reallocated to trade the resource of low desirability for the matching resource of the identified partition that is determined to provide the greatest overall benefit for the system, provided that at least some overall system benefit will result from the reallocation.
摘要:
The present invention provides an improved method, system, and computer program product that can optimize cache utilization. In one embodiment, a kernel service creates a storage map, and sending said storage map to an application. In one embodiment of the present invention, the step of the kernel service creating the storage map may further comprise the kernel service creating a cache map. In one embodiment of the present invention, the step of the kernel service creating the storage map may further comprise the kernel service creating an indication of one or more storage locations that have been allocated to store information for the application. In one embodiment of the present invention, the step of the kernel service creating the storage map may further comprise the kernel service creating the storage map in response to receiving a request for the storage map from the application.
摘要:
A method of allocating resources in a data processing system is disclosed. The method includes an application designing a page reallocation scheme and sending said page reallocation scheme from said application to a kernel service that is responsible for allocation of storage locations.
摘要:
In view of the foregoing, the shortcomings of the prior art cache optimization techniques, the present invention provides an improved method, system, and computer program product that can optimize cache utilization. In one embodiment, an application requests a kernel cache map from a kernel service and the application receives the kernel. The application designs an optimum cache footprint for a data set from said application. The objects, advantages and features of the present invention will become apparent from the following detailed description. In one embodiment of the present invention, the application transmits a memory reallocation order to a memory manager. In one embodiment of the present invention, the step of the application transmitting a memory reallocation order to the memory manager further comprises the application transmitting a memory reallocation order containing the optimum cache footprint to the memory manager. In one embodiment of the present invention, the step of the application transmitting a memory reallocation order to a memory manager further comprises the application transmitting the memory reallocation order containing to a reallocation services tool within the memory manager.
摘要:
A system for managing data in a plurality of storage locations. In response to a least recently used algorithm wanting to move data from a cache to a storage location, an aging table is searched for an associated entry for the data. In response to finding the associated entry for the data in the aging table, an indicator is enabled on the data. In response to determining that the indicator is enabled on the data, the data is kept in the cache despite the least recently used algorithm wanting to move the data to the storage location.
摘要:
A method, apparatus, and computer instructions for transferring data. The data in a first partition is received within a memory region assigned to the first partition in the logical partitioned data processing system to form received data. The memory region is assigned to a second partition, in response to a determination that the received data is for the second partition. The second partition may then access the data in the memory region.
摘要:
A method, programmed medium and system are provided for enabling a core's cache capacity to be increased by using the caches of the disabled or non-enabled cores on the same chip. Caches of disabled or non-enabled cores on a chip are made accessible to store cachelines for those chip cores that have been enabled, thereby extending cache capacity of enabled cores.
摘要:
A method, programmed medium and system are provided for enabling a core's cache capacity to be increased by using the caches of the disabled or non-enabled cores on the same chip. Caches of disabled or non-enabled cores on a chip are made accessible to store cachelines for those chip cores that have been enabled, thereby extending cache capacity of enabled cores.
摘要:
An approach is provided to identify a disabled processing core and an active processing core from a set of processing cores included in a processing node. Each of the processing cores is assigned a cache memory. The approach extends a memory map of the cache memory assigned to the active processing core to include the cache memory assigned to the disabled processing core. A first amount of data that is used by a first process is stored by the active processing core to the cache memory assigned to the active processing core. A second amount of data is stored by the active processing core to the cache memory assigned to the inactive processing core using the extended memory map.
摘要:
Standalone software performance optimizer systems for hybrid systems include a hybrid system having a plurality of processors, memory operably connected to the processors, an operating system including a dispatcher loaded into the memory, a multithreaded application read into the memory, and a static performance analysis program loaded into the memory; wherein the static performance analysis program instructs at least one processor to perform static performance analysis on each of the threads, the static performance analysis program instructs at least one processor to assign each thread to a CPU class based on the static performance analysis, and the static performance analysis program instructs at least one processor to store each thread's CPU class. An embodiment of the invention may also include the dispatcher optimally mapping threads to processors using thread CPU classes and remapping threads to processors when a runtime performance analysis classifies a thread differently from the static performance analysis.