摘要:
A method and apparatus for invalidating entries within a translation control entry (TCE) cache are disclosed. A host bridge is coupled between a group of processors and a group of adaptors. The host bridge includes a TCE cache. The TCE cache contains the most-recently use copies of TCEs in a TCE table located in a system memory. In response to a modification to a TCE in the TCE table by one of the processors, a memory mapped input/output (MMIO) Store is sent to a TCE invalidate register to specify an address of the modified TCE. The data within the TCE invalidate register is then utilized to generate a command for invalidating an entry in the TCE cache containing an unmodified copy of the modified TCE in the TCE table. The command is subsequently sent to the host bridge to invalidate the entry in the TCE cache.
摘要:
A technique for handling interrupts in a data processing system includes receiving, at an interrupt presentation controller (IPC), an event notification message (ENM). The ENM specifies an event target number, a number of bits to ignore, an event source number, and an event priority. The IPC determines a group of virtual processor threads that may be potentially interrupted based on the event target number and the number of bits to ignore specified in the ENM. The event target number identifies a specific virtual processor thread and the number of bits to ignore identifies the number of lower-order bits to ignore with respect to the specific virtual processor thread when determining a group of virtual processor threads that may be potentially interrupted.
摘要:
A method, system, and computer usable program product for scaling energy use in a virtualized data processing environment are provided in the illustrative embodiments. A set of PIOAs is configured such that each PIOAs in the set of PIOAs is a functional equivalent of another PIOAs in the set of PIOAs. A utilization of each PIOA in the set of PIOAs is measured. A number of PIOAs needed to service a workload is determined. A first subset of PIOAs from the set of PIOAs is powered down if the number of PIOAs needed to service the workload is smaller than a number of operational PIOAs. The I/O operations associated with the first subset of PIOAs are transferred to a second subset of PIOAs remaining operational in the set of PIOAs.
摘要:
A method for managing energy. A processor unit identifies a plurality of groups of virtual machines in a computer system. The processor unit allocates the energy in the computer system to the plurality of groups of virtual machines based on a policy.
摘要:
A method, data processing system, and computer program product for managing energy. A processor unit identifies a plurality of groups of virtual machines in a computer system. The processor unit allocates the energy in the computer system to the plurality of groups of virtual machines based on a policy.
摘要:
Systems, methods, and software products for moving and/or resizing a producer-consumer queue in memory without stopping all activity is provided so that no data is lost or accidentally duplicated during the move. There is a software consumer and a hardware producer, such as a host channel adapter.
摘要:
Performance counters are provided for virtualized network interfaces of communications networks, while minimizing the use of hardware resources. A virtualized network interface includes physical resources, as well as logical resources. Dedicated performance counters are provided for the physical resources of the virtualized network interface, as well as for logical partitions coupled to that interface, while non-dedicated performance counters are provided for the logical resources. This enables the provision of performance counters for virtualized network interfaces, while minimizing hardware resources consumed by those interfaces.
摘要:
An information processing system is provided which includes a plurality of system resources, and an event queue having a maximum number of entries. An event recording mechanism of the information processing system is operable to make entries regarding events in the event queue, wherein the entries are limited to a predetermined number of active entries in the event queue per each type of event per each of the system resources. In a particular embodiment, the number of entries per each type of event for each of the system resources is limited to one.
摘要:
An information processing system is provided which includes a plurality of system resources, and an event queue having a maximum number of entries. An event recording mechanism of the information processing system is operable to make entries regarding events in the event queue, wherein the entries are limited to a predetermined number of active entries in the event queue per each type of event per each of the system resources. In a particular embodiment, the number of entries per each type of event for each of the system resources is limited to one.
摘要:
A method, system, and computer-usable medium for supporting debugging of host channel adapters in a logical partitioning environment. In a preferred embodiment of the present invention, a hypervisor acquires control of a trace facility and sets trace parameters for the host channel adapter. In response to determining a trace event that matches said trace parameter has been triggered, the hypervisor retrieves trace information from a buffer. In response to determining the buffer does not include any more trace information, the hypervisor determines if modification of the trace parameters is required. If the modification of the trace parameters is required, the hypervisor alters the trace parameters in anticipation of another trace event.