Abstract: Methods, systems, and computer program products for data entry device security are provided. Aspects include receiving an indication of a user presence at a data entry device, wherein the data entry device includes a surface with apertures, and wherein the apertures include a material with a reflection coefficient. A presence of a fraud device is determined by emitting, from beneath the surface, security light from a set of one or more emitters, wherein the security light has a security light luminous power. A reflection of the security light off the material is collected by a first set of one or more sensors, wherein the reflection has a reflection luminous power. A luminous power range is determined based on the security light luminous power and the reflection coefficient and based on the reflection luminous power being outside the luminous power range, security measures are engaged at the data entry device.

Abstract: Methods, systems, and computer program products for data entry device security are provided. Aspects include receiving an indication of a user presence at a data entry device, wherein the data entry device includes a surface with apertures, and wherein the apertures include a material with a reflection coefficient. A presence of a fraud device is determined by emitting, from beneath the surface, security light from a set of one or more emitters, wherein the security light has a security light luminous power. A reflection of the security light off the material is collected by a first set of one or more sensors, wherein the reflection has a reflection luminous power. A luminous power range is determined based on the security light luminous power and the reflection coefficient and based on the reflection luminous power being outside the luminous power range, security measures are engaged at the data entry device.

Abstract: Methods, systems, and computer program products for data entry device security are provided. Aspects include receiving an indication of a user presence at a data entry device, wherein the data entry device includes a surface with apertures, and wherein the apertures include a material with a reflection coefficient. A presence of a fraud device is determined by emitting, from beneath the surface, security light from a set of one or more emitters, wherein the security light has a security light luminous power. A reflection of the security light off the material is collected by a first set of one or more sensors, wherein the reflection has a reflection luminous power. A luminous power range is determined based on the security light luminous power and the reflection coefficient and based on the reflection luminous power being outside the luminous power range, security measures are engaged at the data entry device.

Abstract: Methods, systems, and computer program products for data entry device security are provided. Aspects include receiving an indication of a user presence at a data entry device, wherein the data entry device includes a surface with apertures, and wherein the apertures include a material with a reflection coefficient. A presence of a fraud device is determined by emitting, from beneath the surface, security light from a set of one or more emitters, wherein the security light has a security light luminous power. A reflection of the security light off the material is collected by a first set of one or more sensors, wherein the reflection has a reflection luminous power. A luminous power range is determined based on the security light luminous power and the reflection coefficient and based on the reflection luminous power being outside the luminous power range, security measures are engaged at the data entry device.

Abstract: Methods, systems, and computer program products for data entry device security are provided. Aspects include receiving an indication of a user presence at a data entry device, wherein the data entry device includes a surface with apertures, and wherein the apertures include a material with a reflection coefficient. A presence of a fraud device is determined by emitting, from beneath the surface, security light from a set of one or more emitters, wherein the security light has a security light luminous power. A reflection of the security light off the material is collected by a first set of one or more sensors, wherein the reflection has a reflection luminous power. A luminous power range is determined based on the security light luminous power and the reflection coefficient and based on the reflection luminous power being outside the luminous power range, security measures are engaged at the data entry device.

Abstract: Methods, systems, and computer program products for data entry device security are provided. Aspects include receiving an indication of a user presence at a data entry device, wherein the data entry device includes a surface with apertures, and wherein the apertures include a material with a reflection coefficient. A presence of a fraud device is determined by emitting, from beneath the surface, security light from a set of one or more emitters, wherein the security light has a security light luminous power. A reflection of the security light off the material is collected by a first set of one or more sensors, wherein the reflection has a reflection luminous power. A luminous power range is determined based on the security light luminous power and the reflection coefficient and based on the reflection luminous power being outside the luminous power range, security measures are engaged at the data entry device.

Abstract: Methods, systems, and computer program products for data entry device security are provided. Aspects include receiving an indication of a user presence at a data entry device, wherein the data entry device includes a surface with apertures, and wherein the apertures include a material with a reflection coefficient. A presence of a fraud device is determined by emitting, from beneath the surface, security light from a set of one or more emitters, wherein the security light has a security light luminous power. A reflection of the security light off the material is collected by a first set of one or more sensors, wherein the reflection has a reflection luminous power. A luminous power range is determined based on the security light luminous power and the reflection coefficient and based on the reflection luminous power being outside the luminous power range, security measures are engaged at the data entry device.

Abstract: Methods, systems, and computer program products for data entry device security are provided. Aspects include receiving an indication of a user presence at a data entry device, wherein the data entry device includes a surface with apertures, and wherein the apertures include a material with a reflection coefficient. A presence of a fraud device is determined by emitting, from beneath the surface, security light from a set of one or more emitters, wherein the security light has a security light luminous power. A reflection of the security light off the material is collected by a first set of one or more sensors, wherein the reflection has a reflection luminous power. A luminous power range is determined based on the security light luminous power and the reflection coefficient and based on the reflection luminous power being outside the luminous power range, security measures are engaged at the data entry device.

Abstract: A capability is provided for predicting the performance of a communications network, such as a multi-stage communications network. The predicted performance includes, in one aspect, predicting the amount of bandwidth that a server of the communications network could deliver with a full load on the network. In one aspect, the predictive capability includes determining an aggregate load for each server of the network being analyzed; performing normalization on the loads of the links used by the servers to obtain updated link and/or server bandwidths; and determining for each server, a minimum bandwidth over the links in the server's route.

Abstract: A capability is provided for predicting the performance of a communications network, such as a multi-stage communications network. The predicted performance includes, in one aspect, predicting the amount of bandwidth that a server of the communications network could deliver with a full load on the network. In one aspect, the predictive capability includes determining an aggregate load for each server of the network being analyzed; performing normalization on the loads of the links used by the servers to obtain updated link and/or server bandwidths; and determining for each server, a minimum bandwidth over the links in the server's route.

Abstract: As disclosed herein, a method, executed by a computer, for analyzing a performance metric includes distributing link connection information for a network to each node in the network, pairing each node with another node in the network to provide paired nodes, testing a performance metric for the paired nodes, and generating a performance report for the network. The method may further include receiving link connection information for the network. The method may further include constructing a connectivity graph based on the received link connection information. The method can be used to test link performance within non-homogeneous networks. A computer system product and a computer program product corresponding to the method are also disclosed herein.

Abstract: As disclosed herein, a method, executed by a computer, for analyzing a performance metric includes distributing link connection information for a network to each node in the network, pairing each node with another node in the network to provide paired nodes, testing a performance metric for the paired nodes, and generating a performance report for the network. The method may further include receiving link connection information for the network. The method may further include constructing a connectivity graph based on the received link connection information. The method can be used to test link performance within non-homogeneous networks.

Abstract: As disclosed herein, a method, executed by a computer, for analyzing a performance metric includes distributing link connection information for a network to each node in the network, pairing each node with another node in the network to provide paired nodes, testing a performance metric for the paired nodes, and generating a performance report for the network. The method may further include receiving link connection information for the network. The method may further include constructing a connectivity graph based on the received link connection information. The method can be used to test link performance within non-homogeneous networks. A computer system product and a computer program product corresponding to the method are also disclosed herein.

Abstract: As disclosed herein, a method, executed by a computer, for analyzing a performance metric includes distributing link connection information for a network to each node in the network, pairing each node with another node in the network to provide paired nodes, testing a performance metric for the paired nodes, and generating a performance report for the network. The method may further include receiving link connection information for the network. The method may further include constructing a connectivity graph based on the received link connection information. The method can be used to test link performance within non-homogeneous networks.

Abstract: A capability is provided for predicting the performance of a communications network, such as a multi-stage communications network. The predicted performance includes, in one aspect, predicting the amount of bandwidth that a server of the communications network could deliver with a full load on the network. In one aspect, the predictive capability includes determining an aggregate load for each server of the network being analyzed; performing normalization on the loads of the links used by the servers to obtain updated link and/or server bandwidths; and determining for each server, a minimum bandwidth over the links in the server's route.

Abstract: A capability is provided for predicting the performance of a communications network, such as a multi-stage communications network. The predicted performance includes, in one aspect, predicting the amount of bandwidth that a server of the communications network could deliver with a full load on the network. In one aspect, the predictive capability includes determining an aggregate load for each server of the network being analyzed; performing normalization on the loads of the links used by the servers to obtain updated link and/or server bandwidths; and determining for each server, a minimum bandwidth over the links in the server's route.

Abstract: In remote direct memory access transfers in a multinode data processing system in which the nodes communicate with one another through communication adapters coupled to a switch or network, failures in the nodes or in the communication adapters can produce the phenomenon known as trickle traffic, which is data that has been received from the switch or from the network that is stale but which may have all the signatures of a valid packet data. The present invention addresses the trickle traffic problem in two situations: node failure and adapter failure. In the node failure situation randomly generated keys are used to reestablish connections to the adapter while providing a mechanism for the recognition of stale packets. In the adapter failure situation, a round robin context allocation approach is used with adapter state contexts being provided with state information which helps to identify stale packets.

Abstract: In a multinode data processing system in which nodes exchange information over a network or through a switch, a structure and mechanism is provided within the realm of Remote Direct Memory Access (RDMA) operations in which DMA operations are present on one side of the transfer but not the other. On the side in which the transfer is not carried out in DMA fashion, transfer processing is carried out under program control; this is in contrast to the transfer on the DMA side which is characteristically carried out in hardware. Usage of these combination processes is useful in programming situations where RDMA is carried out to or from contiguous locations in memory on one side and where memory locations on the other side is noncontiguous. This split mode of transfer is provided both for read and for write operations.

Abstract: A method of interfacing two components of a computing system is provided wherein the method includes providing a pair of unidirectional, point-to-point buses to transmit data between a master bus controller of the computing system and a slave bus controller of a processor unit of the computing system. The method also includes providing means for transmitting a command packet with an address associated with data pertaining to the command from the master bus controller to the slave bus controller. In addition, the method includes providing means for determining by the slave bus controller whether the slave bus controller can accept the command. The method further includes providing means for transmitting an acknowledgement from the slave bus controller to the master bus controller after the slave bus controller receives a first signaling interval for the command packet if the slave bus controller can accept the command packet.

Abstract: A method of interfacing two components of a computing system is provided wherein the method includes providing a pair of unidirectional, point-to-point buses to transmit data between a master bus controller of the computing system and a slave bus controller of a processor unit of the computing system. The method also includes providing means for transmitting a command packet with an address associated with data pertaining to the command from the master bus controller to the slave bus controller. In addition, the method includes providing means for determining by the slave bus controller whether the slave bus controller can accept the command. The method further includes providing means for transmitting an acknowledgement from the slave bus controller to the master bus controller after the slave bus controller receives a first signaling interval for the command packet if the slave bus controller can accept the command packet.