| Patent application number | Description | Published |
|---|
| 20080209130 | Translation Data Prefetch in an IOMMU - In an embodiment, a system memory stores a set of input/output (I/O) translation tables. One or more I/O devices initiate direct memory access (DMA) requests including virtual addresses. An I/O memory management unit (IOMMU) is coupled to the I/O devices and the system memory, wherein the IOMMU is configured to translate the virtual addresses in the DMA requests to physical addresses to access the system memory according to an I/O translation mechanism implemented by the IOMMU. The IOMMU comprises one or more caches, and is configured to read translation data from the I/O translation tables responsive to a prefetch command that specifies a first virtual address. The reads are responsive to the first virtual address and the I/O translation mechanism, and the IOMMU is configured to store data in the caches responsive to the read translation data. | 08-28-2008 |
| 20080281964 | Server discovery, spawning collector threads to collect information from servers, and reporting information - Server discovery, spawning collector threads to collect information from servers, and reporting such information, is disclosed. A method of one embodiment determines a number of servers communicatively coupled to a network. For each server, a collector thread is spawned to collect information regarding the server by sending requests to the server and receiving responses from the server. The collector threads can be spawned by and run on a computing device other than the number of servers, such that no computer-executable code is installed on the servers for collecting the information. Upon completion of the collector thread for each server, the information regarding the server as collected is stored to a database by one or more writer threads. The information may include dynamic load-oriented and function-oriented information regarding the servers, as well as static configuration information, from which server utilization-oriented statistics may be distilled to identify candidate servers for server consolidation. | 11-13-2008 |
| 20090006597 | Trust Evaluation - A solution for evaluating trust in a computer infrastructure is provided. In particular, a plurality of computing devices in the computer infrastructure evaluate one or more other computing devices in the computer infrastructure based on a set of device measurements for the other computing device(s) and a set of reference measurements. To this extent, each of the plurality of computing devices also provides a set of device measurements for processing by the other computing device(s) in the computer infrastructure. | 01-01-2009 |
| 20110022818 | IOMMU USING TWO-LEVEL ADDRESS TRANSLATION FOR I/O AND COMPUTATION OFFLOAD DEVICES ON A PERIPHERAL INTERCONNECT - An IOMMU for controlling requests by an I/O device to a system memory of a computer system includes control logic and a cache memory. The control logic may translate an address received in a request from the I/O device. If the request includes a transaction layer protocol (TLP) packet with a process address space identifier (PASID) prefix, the control logic may perform a two-level guest translation. Accordingly, the control logic may access a set of guest page tables to translate the address received in the request. A pointer in a last guest page table points to a first table in a set of nested page tables. The control logic may use the pointer in a last guest page table to access the set of nested page tables to obtain a system physical address (SPA) that corresponds to a physical page in the system memory. The cache memory stores completed translations. | 01-27-2011 |
| 20110023027 | I/O MEMORY MANAGEMENT UNIT INCLUDING MULTILEVEL ADDRESS TRANSLATION FOR I/O AND COMPUTATION OFFLOAD - An input/output memory management unit (IOMMU) configured to control requests by an I/O device to a system memory includes control logic that may perform a two-level guest translation to translate an address associated with an I/O device-generated request using translation data stored in the system memory. The translation data includes a device table having a number of entries. The control logic may select the device table entry for a given request by the using a device identifier that corresponds to the I/O device that generates the request. The translation data may also include a first set of I/O page tables including a set of guest page tables and a set of nested page tables. The selected device table entry for the given request may include a pointer to the set of guest translation tables, and a last guest translation table includes a pointer to the set of nested page tables | 01-27-2011 |
