Abstract: A system and method for providing dynamic device virtualization is herein disclosed. According to one embodiment, the computer-implemented method includes providing a hypervisor and one or more guest virtual machines (VMs). Each guest VM is disposed to run a guest user process and the hypervisor is split into a device hypervisor and a compute hypervisor. The computer-implemented method further includes providing an interface between the device hypervisor and the compute hypervisor. The compute hypervisor manages an efficient use of CPU and memory of a host and the device hypervisor manages a device connected to the host by exploiting hardware acceleration of the device.

Abstract: A system and method for providing dynamic device virtualization is herein disclosed. According to one embodiment, the computer-implemented method includes providing a hypervisor and one or more guest virtual machines (VMs). Each guest VM is disposed to run a guest user process and the hypervisor is split into a device hypervisor and a compute hypervisor. The computer-implemented method further includes providing an interface between the device hypervisor and the compute hypervisor. The compute hypervisor manages an efficient use of CPU and memory of a host and the device hypervisor manages a device connected to the host by exploiting hardware acceleration of the device.

Abstract: A system and method for providing dynamic device virtualization is herein disclosed. According to one embodiment, the computer-implemented method includes providing a hypervisor and one or more guest virtual machines (VMs). Each guest VM is disposed to run a guest user process and the hypervisor is split into a device hypervisor and a compute hypervisor. The computer-implemented method further includes providing an interface between the device hypervisor and the compute hypervisor. The compute hypervisor manages an efficient use of CPU and memory of a host and the device hypervisor manages a device connected to the host by exploiting hardware acceleration of the device.

Abstract: A system and method for providing dynamic device virtualization is herein disclosed. According to one embodiment, the computer-implemented method includes providing a hypervisor and one or more guest virtual machines (VMs). Each guest VM is disposed to run a guest user process and the hypervisor is split into a device hypervisor and a compute hypervisor. The computer-implemented method further includes providing an interface between the device hypervisor and the compute hypervisor. The compute hypervisor manages an efficient use of CPU and memory of a host and the device hypervisor manages a device connected to the host by exploiting hardware acceleration of the device.

Abstract: A system and method for providing dynamic device virtualization is herein disclosed. According to one embodiment, the computer-implemented method includes providing a hypervisor and one or more guest virtual machines (VMs). Each guest VM is disposed to run a guest user process and the hypervisor is split into a device hypervisor and a compute hypervisor. The computer-implemented method further includes providing an interface between the device hypervisor and the compute hypervisor. The compute hypervisor manages an efficient use of CPU and memory of a host and the device hypervisor manages a device connected to the host by exploiting hardware acceleration of the device.

Abstract: A system and method for providing dynamic device virtualization is herein disclosed. According to one embodiment, the computer-implemented method includes providing a device virtualization via context switching between a guest user process and a host. The guest user process has an address space comprising at least a guest kernel and a host kernel. The guest user process is capable of making a first direct call into the host via the guest kernel of the address space. The host is capable of making a second direct call to the guest user process.

Abstract: A system and method for providing dynamic device virtualization is herein disclosed. According to one embodiment, the computer-implemented method includes observing a behavior of a native device driver of a device attached to a host computer, dynamically creating a virtual device driver by observing the behavior of the native device driver on a host operating system (OS) of the host computer, and providing the virtual device driver to a guest OS running on a virtualization host.

Abstract: Methods and apparatuses are provided for facilitating sharing device connections across multiple physical and/or virtual (logical) computers. A method may include receiving a USB device request from a virtual host controller driver of a client when a host is not in a power save mode and passing a USB device request to a host controller driver of the client when the host is in a power save mode. A method may also include activating a sharing switch of a host controller to connect a device connection port to the host when the host is not in a power save mode and to connect the device connection port to the client when the host is in a power save mode. Corresponding apparatuses and computer program products are also provided.

Abstract: A system and method for providing dynamic device virtualization is herein disclosed. According to one embodiment, the computer-implemented method includes observing a behavior of a native device driver of a device attached to a host computer, dynamically creating a virtual device driver by observing the behavior of the native device driver on a host operating system (OS) of the host computer, and providing the virtual device driver to a guest OS running on a virtualization host.

Abstract: A system and method for providing dynamic device virtualization is herein disclosed. According to one embodiment, the computer-implemented method includes providing a hypervisor and one or more guest virtual machines (VMs). Each guest VM is disposed to run a guest user process and the hypervisor is split into a device hypervisor and a compute hypervisor. The computer-implemented method further includes providing an interface between the device hypervisor and the compute hypervisor. The compute hypervisor manages an efficient use of CPU and memory of a host and the device hypervisor manages a device connected to the host by exploiting hardware acceleration of the device.

Abstract: A system and method for providing dynamic device virtualization is herein disclosed. According to one embodiment, the computer-implemented method includes providing a device virtualization via context switching between a guest user process and a host. The guest user process has an address space comprising at least a guest kernel and a host kernel. The guest user process is capable of making a first direct call into the host via the guest kernel of the address space. The host is capable of making a second direct call to the guest user process.

Abstract: Methods and apparatuses are provided for providing application level device transparency via device devirtualization. A method may include providing a devirtualization server driver on a host system. The method may further include receiving, at the devirtualization server driver, a request from a devirtualization client driver on a guest system for access to a physical device implemented on the host system. The request may be associated with a guest application on the guest system. The method may additionally include causing the guest application to be provided with access to directly control the device as if the device were present on the guest system without implementing a driver specific to the device on the guest system. Control of the device may be concurrently shared between the guest application and the host system. A corresponding apparatus is also provided.

Abstract: Methods and apparatuses are provided for facilitating sharing device connections across multiple physical and/or virtual (logical) computers. A method may include receiving a USB device request from a virtual host controller driver of a client when a host is not in a power save mode and passing a USB device request to a host controller driver of the client when the host is in a power save mode. A method may also include activating a sharing switch of a host controller to connect a device connection port to the host when the host is not in a power save mode and to connect the device connection port to the client when the host is in a power save mode. Corresponding apparatuses and computer program products are also provided.

Abstract: Methods and apparatuses are provided for providing a virtual machine with dynamic direct assignment of a physical hardware resource. A method may include providing a virtual machine with a directly assigned physical hardware resource and an emulated hardware resource corresponding to the directly assigned physical hardware resource. The method may further include causing the virtual machine to hot-swap from using the directly assigned physical hardware resource to using the emulated hardware resource. The method may additionally include, subsequent to causing the virtual machine to hot-swap to using the emulated hardware resource, causing the directly assigned physical hardware resource to be hot-removed from the virtual machine Corresponding apparatuses are also provided.

Abstract: The present invention describes a method of efficiently optimizing instruction scheduling and register allocation in a post optimizer. The method removes false register dependencies between pipelined instructions by building an incremental (partial) interference graph of register allocation for scheduled instructions. False dependency graph indicates the amount of parallelism in the data flow graph. The incremental interference graph uses a mix of virtual and physical registers. The interference graph is built incrementally as an instruction schedular schedules each instruction. The optimization is done incrementally on localized code. The physical register mapping is maximized and virtual registers are created on demand basis.

Abstract: A new method and apparatus for use in post compilation optimizers is presented. The present invention is based on the use of a new graphical representation of code in a linked program called an operands graph. An operands graph combines the best evaluative features of flow graphs in single static-assignment (SSA) form and of value range optimizations. The result is a new ability to evaluate and optimize previously hidden code segments, including code segments only reachable from the various branches of a mutliway branch instructions.

Abstract: Region based optimization may be accomplished by creating dependence graphs for each block and then incrementally computing a single dependence graph for the region. First dependence DAGs are created for each block in the region. This includes defining incoming and outgoing dangling edges for each block. Each dependence DAG is then linked as a control flow graph. Examining of each incoming dangling edge within each block of the region then takes place, with the process traversing each path along the control flow graph in reverse, attempting to match each incoming dangling edge with a corresponding incoming or outgoing dangling edge, stopping only if an outgoing match is found, the same block is examined twice, or the top of the region is found.

Abstract: The present invention describes a method of efficiently optimizing instruction scheduling and register allocation in a post optimizer. The method removes false register dependencies between pipelined instructions by building an incremental (partial) interference graph of register allocation for scheduled instructions. False dependency graph indicates the amount of parallelism in the data flow graph. The incremental interference graph uses a mix of virtual and physical registers. The interference graph is built incrementally as an instruction schedular schedules each instruction. The optimization is done incrementally on localized code. The physical register mapping is maximized and virtual registers are created on demand basis.