Unisys Corporation

Dwayne E Ebersole

Robert A Johnson

Andrew Ward Beale

Anthony Narisi

William W Disney

Sarah K Inforzato

Kathleen Wild

Philip M Hoffman

Loren C Wilton

Robert Frank Inforzato

Sharon M Mauer

Bong Jae Lee

Michael I Bell

Tatyana Martsun

Grace W Lin

Joel A Stern

Daryl R Smith

Greg L Gensichen

Methods and systems for implementing independent time in a hosted operating environment are disclosed. The hosted, or guest, operating environment, can be seeded with a guest time value by a guest operating environment manager that maintains a time delta between a host clock time and an enterprise time. The guest operating environment can subsequently manage its guest clock from the guest time value. If the guest operating environment is halted, the guest operating environment manager can manage correspondence between the host clock time and the enterprise time by periodically assessing divergence between actual and expected values of the host clock time.

Mechanism for implementing independent time in a hosted operating environment

A method and system for secure automated deployment of an emulated computer system. The method includes providing a download package for installation on a target machine. The download package includes a generic emulated computer system having no unique identity, no model identity, no features, and minimal processing components. The download package also includes a customer order file based on an order from a customer of the target machine. The customer order file includes a machine identity, at least one machine capability, and control data. The download package also includes at least one enabling key configured to enable the emulated computer system on the target machine. The enabling key is customized based on the order from the customer of the target machine, and includes identity information that restricts the use of the emulated computer system on any computer system other than the target machine. The method also includes delivering the download package to the target machine for installation of the emulated computer system on the target machine. The download package prevents the unauthorized cloning of the emulated computer system onto any hardware platforms other than the target machine, and prevents the unauthorized use of any hardware other than the hardware of the target machine.

Method and system for secure automated deployment of emulated computer system

Intelligent NIC optimizations includes system and methods for Token Table Posting, use of a Master Completion Queue, Notification Request Area (NRA) associated with completion queues, preferably in the Network Interface Card (NIC) for providing notification of request completions, and what we call Lazy Memory Deregistration which allows non-critical memory deregistration processing to occur during non-busy times. These intelligent NIC optimizations which can be applied outside the scope of VIA (e.g. iWARP and the like), but also support VIA.

Intelligent network interface card (NIC) optimizations

Optimization of the Virtual Interface Architecture (VIA) on Multiprocessor Servers using Physically Independent Consolidated NICs (Network Interface Cards) allows for improved throughput, increased resiliency and transparent fail-over; and also by hiding the actual NICs involved in particular data transactions, enables operations with substantially unmodified applications software.

Optimizing virtual interface architecture (VIA) on multiprocessor servers and physically independent consolidated NICs

Methods and apparatus that enable a first network protocol provider, executing on a first computer system, and a second network protocol provider, executing on a second computer system which is directly interconnected to the first computer system, to communicate at high speed, with low latency, over the interconnection therebetween such that both systems may use their native mechanisms to communicate with each other without change in those mechanisms, rather than over conventional network communication paths such as Ethernet. An interconnection couples the input/output (I/O) subsystem of the first computer system to the I/O subsystem of the second computer system such data can be transmitted between the systems, and a virtual LAN (&ldquo;VLAN&rdquo;) device driver executing on the second computer system provides an interface between the interconnection and the native communications mechanisms of the second computer system. The VLAN simulates a conventional network driver such as an NDIS Fiber Distributed Data Interface (FDDI) network interface card (NIC) Miniport driver to the transport protocol driver TCPIP.SYS on the second computer system and exchanges data with the first computer system via a particular line of a LAN station group for delivery to and receipt from the first computer system.

Virtual LAN interface for high-speed communications between heterogeneous computer systems

A first network protocol provider, executing on a first computer system and having a first network address associated therewith, and a second network protocol provider, executing on a second computer system and having a second network address associated therewith, share a same network interface card installed on the second computer system. Apparatus providing this ability comprises an interconnection between the first and second computer systems over which data can be transferred between them, and a router executing on the second computer system that routes data among the first network protocol provider (via the interconnection), the second network protocol provider, and the network interface card in a manner that enables the network interface card to be shared between the first and second network protocol providers. For example, when data is received from the network by the network interface card, the router routes the data to the first network protocol provider, via the interconnection, when a network address received with the data matches the first network address, but passes the received data to the second network protocol provider when the network address received with the data matches the second network address. A &ldquo;loopback&rdquo; capability also allows data addressed from one network protocol provider to the other to be transmitted between them directly (via the interconnection), bypassing the network interface card. The router can also handle broadcast addresses.

System for communicating heterogeneous computers that are coupled through an I/O interconnection subsystem and have distinct network addresses, via a single network interface card

A computer for executing I/O instructions, by emulation, in a foreign application program includes an emulator program which has a Send thread, a Get thread, and single Result thread. The Send thread calls into a native operating system for the computer to send data from the foreign application program to an I/O port. The Get thread calls into the native operating system to receive data from the I/O port for the foreign application program. The Result thread processes one result descriptor from the native operating system when data is sent for the Send thread, and processes another result descriptor from the native operating system when data is received for the Get thread, and is completely blocked from running on the computer between the processing of the result descriptors. These threads are cleared, asynchronously with respect to the transfer of any data, by sending a CLEAR command from the emulator to the native operating system which responds by unblocking the Result thread and sending it a dummy result descriptor.

Growing community of inventors

Lancaster, PA, United States of America

Dwayne E Ebersole