Abstract: Communication endpoints associated with a virtual machine for migration can be discovered. Properties associated with the communication endpoints can be discovered. The communication endpoints can be matched to establish a communication channel between the endpoints. The communication endpoints, the properties and the at least one communication channel can be used in recreating the communication channel for a migrated version of the virtual machine.

Abstract: Communication endpoints associated with a virtual machine for migration can be discovered. Properties associated with the communication endpoints can be discovered. The communication endpoints can be matched to establish a communication channel between the endpoints. The communication endpoints, the properties and the at least one communication channel can be used in recreating the communication channel for a migrated version of the virtual machine.

Abstract: The present disclosure relates to sharing an I/O device across multiple virtual machines. According to one embodiment, a computing system configures shared ownership of the I/O device between a first partition and one or more of the plurality of virtual machines. The computing system transfers partial ownership of the I/O device from the first partition to the one or more virtual machines and generates device configuration information for the I/O device. The virtual machines can use the generated device configuration information to access and configure the I/O device. Once the I/O device is configured for shared ownership, the computing system boots the one or more virtual machines.

Abstract: Systems, methods, and computer program products to perform an operation comprising executing a device driver in a private logical partition on a compute host, wherein the device driver is configured to execute in an environment different than an environment of a hypervisor of the compute host, establishing a communication channel between the private logical partition and an adjunct partition executing on the compute host, and configuring, responsive to a command sent by the adjunct partition to the device driver via the communication channel, a physical function of a single root I/O virtualization (SR-IOV) device of the host system.

Abstract: Systems, methods, and computer program products to perform an operation comprising executing a device driver in a private logical partition on a compute host, wherein the device driver is configured to execute in an environment different than an environment of a hypervisor of the compute host, establishing a communication channel between the private logical partition and an adjunct partition executing on the compute host, and configuring, responsive to a command sent by the adjunct partition to the device driver via the communication channel, a physical function of a single root I/O virtualization (SR-IOV) device of the host system.

Abstract: The present disclosure relates to sharing an I/O device across multiple virtual machines. According to one embodiment, a computing system establishes a communication channel between a first partition and a second partition. The first partition generally owns an I/O device and the second partition hosts a device driver for the I/O device. The computing system configures shared ownership of the I/O device between the first partition and one or more virtual machines and transfers partial ownership of the I/O device to the second partition. Device configuration information is generated for the I/O device, which is used by the one or more virtual machines and the second partition to access and configure the I/O device. Subsequently, the computing system boots the one or more virtual machines.

Abstract: The present disclosure relates to sharing an I/O device across multiple virtual machines. According to one embodiment, a computing system configures shared ownership of the I/O device between a first partition and one or more of the plurality of virtual machines. The computing system transfers partial ownership of the I/O device from the first partition to the one or more virtual machines and generates device configuration information for the I/O device. The virtual machines can use the generated device configuration information to access and configure the I/O device. Once the I/O device is configured for shared ownership, the computing system boots the one or more virtual machines.

Abstract: Method and system for a multi-level virtual/real cache system with synonym resolution. An exemplary embodiment includes a multi-level cache hierarchy, including a set of L1 caches associated with one or more processor cores and a set of L2 caches, wherein the set of L1 caches are a subset of the set of L2 caches, wherein the set of L1 caches underneath a given L2 cache are associated with one or more of the processor cores.

Abstract: Method and system for a multi-level virtual/real cache system with synonym resolution. An exemplary embodiment includes a multi-level cache hierarchy, including a set of L1 caches associated with one or more processor cores and a set of L2 caches, wherein the set of L1 caches are a subset of the set of L2 caches, wherein the set of L1 caches underneath a given L2 cache are associated with one or more of the processor cores.

Abstract: A system and method for visualizing data in two-dimensional time-space diagrams including generating multi-dimensional program trace files, converting and merging them into interval trace files, and generating multiple time-space diagrams (multiple Gantt charts) to visualize the resulting multi-dimensional interval trace files. The needed events and trace information required to form multi-dimensional event traces are described in event trace files typically gathered from running programs, such as parallel programs for technical computing and Web server processes. The method includes converting event traces into interval traces. In one selectable design, the two-dimensional time-space diagrams includes three discriminator types (thread, processor, and activity) and six discriminator-legend combinations, capable of producing seven possible views. The six discriminator-legend combinations are thread-activity, thread-processor, processor-thread, processor-activity, activity-thread, and activity-processor.

Abstract: A system and method for visualizing data in two-dimensional time-space diagrams including generating multi-dimensional program trace files, converting and merging them into interval trace files, and generating multiple time-space diagrams (multiple Gantt charts) to visualize the resulting multi-dimensional interval trace files. The needed events and trace information required to form multi-dimensional event traces are described in event trace files typically gathered from running programs, such as parallel programs for technical computing and Web server processes. The method includes converting event traces into interval traces. In one selectable design, the two-dimensional time-space diagrams includes three discriminator types (thread, processor, and activity) and six discriminator-legend combinations, capable of producing seven possible views. The six discriminator-legend combinations are thread-activity, thread-processor, processor-thread, processor-activity, activity-thread, and activity-processor.

Abstract: A two-level virtual/real cache system, and a method for detecting and resolving synonyms in the two-level virtual/real cache system, are described. Lines of a first level virtual cache are tagged with a virtual address and a real pointer which points to a corresponding line in a second level real cache. Lines in the second level real cache are tagged with a real address and a virtual pointer which points to a corresponding line in the first level virtual cache, if one exists. A translation-lookaside buffer (TLB) is used for translating virtual to real addresses for accessing the second level real cache. Synonym detection is performed at the second level real cache. An inclusion bit I is set in a directory of the second level real cache to indicate that a particular line is included in the first level virtual cache. Another bit, called a buffer bit B, is set whenever a line in the first level virtual cache is placed in a first level virtual cache writeback buffer for updating main memory.