Patent application number | Description | Published |
20110246989 | RDMA (REMOTE DIRECT MEMORY ACCESS) DATA TRANSFER IN A VIRTUAL ENVIRONMENT - In an embodiment, a method is provided. In an embodiment, the method provides determining that a message has been placed in a send buffer; and transferring the message to an application on a second virtual machine by bypassing use of an operating system to process the message by directly placing the message in an application memory space from which the application can retrieve the message. | 10-06-2011 |
20120259940 | RDMA (REMOTE DIRECT MEMORY ACCESS) DATA TRANSFER IN A VIRTUAL ENVIRONMENT - In an embodiment, a method is provided. In an embodiment, the method provides determining that a message has been placed in a send buffer; and transferring the message to an application on a second virtual machine by bypassing use of an operating system to process the message by directly placing the message in an application memory space from which the application can retrieve the message. | 10-11-2012 |
20130275631 | DIRECT I/O ACCESS FOR SYSTEM CO-PROCESSORS - Embodiments of the invention describe systems, apparatuses and methods that enable sharing Remote Direct Memory Access (RDMA) device hardware between a host and a peripheral device including a CPU and memory complex (alternatively referred to herein as a processor add-in card). Embodiments of the invention utilize interconnect hardware such as Peripheral Component Interconnect express (PCIe) hardware for peer-to-peer data transfers between processor add-in cards and RDMA devices. A host system may include modules or logic to map memory and registers to and/or from the RDMA device, thereby enabling I/O to be performed directly to and from user-mode applications on the processor add-in card, concurrently with host system I/O operations. | 10-17-2013 |
20140164545 | EXPLICIT FLOW CONTROL FOR IMPLICIT MEMORY REGISTRATION - Methods, apparatus and systems for facilitating explicit flow control for RDMA transfers using implicit memory registration. To setup an RDMA data transfer, a source RNIC sends a request to allocate a destination buffer at a destination RNIC using implicit memory registration. Under implicit memory registration, the page or pages to be registered are not explicitly identified by the source RNIC, and may correspond to pages that are paged out to virtual memory. As a result, registration of such pages result in page faults, leading to a page fault delay before registration and pinning of the pages is completed. In response to detection of a page fault, the destination RNIC returns an acknowledgment indicating that a page fault delay is occurring. In response to receiving the acknowledgment, the source RNIC temporarily stops sending packets, and does not retransmit packets for which ACKs are not received prior to retransmission timeout expiration. | 06-12-2014 |
20140245303 | RDMA (REMOTE DIRECT MEMORY ACCESS) DATA TRANSFER IN A VIRTUAL ENVIRONMENT - In an embodiment, a method is provided. In an embodiment, the method provides determining that a message has been placed in a send buffer; and transferring the message to an application on a second virtual machine by bypassing use of an operating system to process the message by directly placing the message in an application memory space from which the application can retrieve the message. | 08-28-2014 |
20140250202 | PEER-TO-PEER INTERRUPT SIGNALING BETWEEN DEVICES COUPLED VIA INTERCONNECTS - Methods and apparatus to provide peer-to-peer interrupt signaling between devices coupled via one or more interconnects are described. In one embodiment, a NIC (Network Interface Card such as a Remote Direct Memory Access (RDMA) capable NIC) transfers data directly into or out of the memory of a peer device that is coupled to the NIC via one or more interconnects, bypassing a host computing/processing unit and/or main system memory. Other embodiments are also disclosed. | 09-04-2014 |
20150305006 | AT LEAST ONE MECHANISM TO PERMIT, AT LEAST IN PART, ALLOCATION AND/OR CONFIGURATION, AT LEAST IN PART, OF AT LEAST ONE NETWORK-ASSOCIATED OBJECT - In an embodiment, at least one interface mechanism may be provided. The mechanism may permit, at least in part, at least one process allocate, at least in part, and/or configure, at least in part, at least one network-associated object. Such allocation and/or configuration, at least in part, may be in accordance with at least one parameter set that may correspond, at least in part, to at least one query issued by the at least one process via the mechanism. Many modifications are possible without departing from this embodiment. | 10-22-2015 |
20150317280 | METHOD TO OPTIMIZE NETWORK DATA FLOWS WITHIN A CONSTRAINED SYSTEM - Methods, apparatus, and software for optimizing network data flows within constrained systems. The methods enable data to be transferred between PCIe cards in multi-socket server platforms, each platform including a local socket having an InfiniBand (IB) HCA and a remote socket. Data to be transmitted outbound from a platform is transferred from a PCIe card to the platform's IB HCA via a proxied datapath. Data received at a platform may employ a direct PCIe peer-to-peer (P2P) transfer if the destined PCIe card is installed in the local socket or via a proxied datapath if the destined PCIe card is installed in a remote socket. Outbound transfers from a PCIe card in a local socket to the platform's IB HCA may selectively be transferred using an either a proxied data path for larger data transfers or a direct P2P datapath for smaller data transfers. The software is configured to support each of local-local, remote-local, local-remote, and remote-remote data transfers in a manner that is transparent to the software applications generating and receiving the data. | 11-05-2015 |