International Business Machines Corporation

Klaus Theurich

Hartmut Penner

Oliver Benke

H Eberhard Lange

Christoph Raisch

Markus Helms

Thomas Schlipf

Gerd Konrad Bayer

Wolfgang Eckert

Juergen Erwin Maergner

Tobias Ulrich Bergmann

Embodiments include method, systems and computer program products for compressing instrumentation data. Aspects include defining an intermediate region of memory. Instrumentation data associated with a processing device is received and stored in the intermediate region of the memory. The instrumentation data is compressed in the intermediate region of memory and stored in a sample region of memory.

Hardware accelerated compression of instrumentation data

A multiprocessor computer system facility is provided for selectively reallocating a logical processing unit. The logical processing unit is one logical processing unit of multiple logical processing units backed by a socket of a plurality of sockets of a multiprocessor computer system. The selectively reallocating includes: monitoring, during execution of program code, a performance metric of a hardware resource of the socket, the hardware resource being shared by the multiple logical processing units; and reassigning the logical processing unit, based on the monitoring, to a different socket of the plurality of sockets of the multiprocessor computer system to, in part, improve the performance metric of the hardware resource of the socket. The reassigning includes reassigning the logical processing unit based on the monitoring determining that a differential between a resource utilization rate of the socket and a resource utilization rate of the different socket exceeds a set threshold.

Performance-based reallocating of logical processing units to sockets of a computer system

A method is provided to get a high test coverage through a large number of test cases with a minimum number of test programs. Tests are performed flexibly in various environments, using parameters in multiple dimensions. The parameters can be dynamically extracted from the machine or simulator either by controlling scripts or by the test program itself. Multiple ways are offered to execute subsets of the test combinations.

Flexible configuration and control of a testing system

A multiprocessor computer system facility is provided for selectively reallocating a logical processing unit within the computer system. The logical processing unit is one logical processing unit of multiple logical processing units backed by a socket of a plurality of sockets of the multiprocessor computer system. The selectively reallocating includes: monitoring, during execution of program code of the multiple logical processing units, a performance metric of a hardware resource of the socket, the hardware resource being shared by the multiple logical processing units; and reassigning the logical processing unit, based on the monitoring, to a different socket of the plurality of sockets of the multiprocessor computer system to, in part, improve the performance metric of the hardware resource of the socket.

A method and apparatus relates to hardware-to-hardware data transmission in computer systems, and in particular, it relates to method and system for operating I/O adapters attaching either one or more computing devices to an I/O periphery, to a network, or to other computing devices. It is proposed to operate a memory local to the network coupling adapter as a cache memory relative to a system memory associated with the one or more computing devices for storing transmission control information.

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Gechingen, Germany

Klaus Theurich