摘要:
A system and method for flexible device driver resource allocation is disclosed. In one embodiment, a method for allocating device driver resources in a data processing system includes statically allocating hardware resource pools to device drivers on a rigid basis during initialization of the data processing system, and dynamically altering the allocated hardware resource pools to the device drivers based on parameters associated with utilization of the allocated hardware resource pools during run-time.
摘要:
A system and method for flexible device driver resource allocation is disclosed. In one embodiment, a method for allocating device driver resources in a data processing system includes statically allocating hardware resource pools to device drivers on a rigid basis during initialization of the data processing system, and dynamically altering the allocated hardware resource pools to the device drivers based on parameters associated with utilization of the allocated hardware resource pools during run-time.
摘要:
A method and system for optimizing network I/O throughput is disclosed. In one embodiment, a method for optimizing an input/output (I/O) throughput for a storage network comprises measuring a service time for a storage device of the storage network in completing an I/O request serviced by a storage driver. The method also comprises determining a status of an I/O performance between the storage driver and the storage device by comparing the service time with an expected service time for the storage device in completing the I/O request, where the expected service time is calculated based on a type of the storage device and a size of the I/O request. The method further comprises adjusting a maximum queue depth associated with the storage device based on the status of the I/O performance.
摘要:
The method, apparatus and system of an I/O forwarding technique for multi-interrupt capable I/O devices are disclosed. In one embodiment, a method of transferring an I/O request in a cache-coherent non-uniform memory access (ccNUMA) computer system including multiple cells (e.g., each cell may include multiple processors) that are connected via a system interconnect, includes receiving an I/O request from one of the multiple processors associated with one of the multiple cells in the ccNUMA computer system, associating a processor, corresponding to a multi-interrupt capable I/O interface that is servicing the I/O request, located in the one of the multiple cells as a lead processor, and executing an I/O initiation path and a completion path associated with the received I/O request on the lead processor upon associating the lead processor corresponding to the multi-interrupt capable I/O interface.
摘要:
A method and system for processing an input/output request on a multiprocessor computer system comprises pinning a process down to a processor issuing the input/output request. An identity of the processor is passed to a device driver which selects a device adapter request queue whose interrupt is bound to the identified processor and issues the request on that queue. The device accepts the request from the device adapter, processes the request and raises a completion interrupt to the identified processor. On completion of the input/output request the process is un-pinned from the processor. In an embodiment the device driver associates a vector of the identified processor with the request and the device, on completion of the request, interrupts the processor indicated by the vector.
摘要:
A method and system for processing an input/output request on a multiprocessor computer system comprises pinning a process down to a processor issuing the input/output request. An identity of the processor is passed to a device driver which selects a device adapter request queue whose interrupt is bound to the identified processor and issues the request on that queue. The device accepts the request from the device adapter, processes the request and raises a completion interrupt to the identified processor. On completion of the input/output request the process is un-pinned from the processor. In an embodiment the device driver associates a vector of the identified processor with the request and the device, on completion of the request, interrupts the processor indicated by the vector.
摘要:
A method and system of a host device hosting multiple workloads for controlling flows of I/O requests directed to a storage device is disclosed. In one embodiment, a type of a response from the storage device reacting to an I/O request issued by an I/O stack layer of the host device is determined. Then, a workload associated with the I/O request is identified among the multiple workloads based on the response to the I/O request. Further, a maximum queue depth assigned to the workload is adjusted based on the type of the response, where the maximum queue depth is a maximum number of I/O requests from the workload which are concurrently issuable by the I/O stack layer.
摘要:
A method and system of a host device hosting multiple workloads for controlling flows of I/O requests directed to a storage device is disclosed. In one embodiment, a type of a response from the storage device reacting to an I/O request issued by an I/O stack layer of the host device is determined. Then, a workload associated with the I/O request is identified among the multiple workloads based on the response to the I/O request. Further, a maximum queue depth assigned to the workload is adjusted based on the type of the response, where the maximum queue depth is a maximum number of I/O requests from the workload which are concurrently issuable by the I/O stack layer.
摘要:
A method, a system and a computer program for determining device criticality during SAN reconfiguration operations comprising the steps of building the SAN connectivity graph and mapping the reconfiguration on SAN connectivity graph; locating the affected host systems; and determining the device criticality for each of the affected host systems. The hosts systems may also be provided with impact analysis agents to generate device criticality on host systems and a central agent to aggregate the device criticality from impact analysis agent and provide feedback to data center administrator.
摘要:
The method, apparatus and system of an I/O forwarding technique for multi-interrupt capable I/O devices are disclosed. In one embodiment, a method of transferring an I/O request in a cache-coherent non-uniform memory access (ccNUMA) computer system including multiple cells (e.g., each cell may include multiple processors) that are connected via a system interconnect, includes receiving an I/O request from one of the multiple processors associated with one of the multiple cells in the ccNUMA computer system, associating a processor, corresponding to a multi-interrupt capable I/O interface that is servicing the I/O request, located in the one of the multiple cells as a lead processor, and executing an I/O initiation path and a completion path associated with the received I/O request on the lead processor upon associating the lead processor corresponding to the multi-interrupt capable I/O interface.