摘要:
A shared memory multiprocessor (SMP) has efficient access to a main memory included in a particular node and a management of partitions that include the nodes. In correspondence with each page of main memory included in a node, a bit stored in a register indicates if the page has been accessed from any other node. In a case where the bit is “0”, a cache coherent command to be sent to the other nodes is not transmitted. The bit is reset by software at the time of initialization and memory allocation, and it is set by hardware when the page of the main memory is accessed from any other node. In a case where the interior of an SMP is divided into partitions, the main memory of each node is divided into local and shared areas, for which respectively separate addresses can be designated. In each node, the configuration information items of the shared area and the local area are stored in registers. The command of access to the shared area is multicast to all of the nodes, whereas the command is multicast only to the nodes within the corresponding partition when the local area is accessed.
摘要:
In an information processing apparatus having a crossbar switch, registers are provided for logical division of a connection of the crossbar switch into a plurality of groups, in order to allow a system to change the group division configuration while the system is in an ordinary operation. As an application of this, in a hot standby system, when a fault occurs in an active partition and the active partition is replaced by a standby partition, the standby partition is allowed to include system resources used by the active partition such as CPU's and memories.
摘要:
An information processing apparatus includes a crossbar switch having a plurality of switching circuits for data transfer; connection lines having address data transfer paths of m-bit unit connected to each of the input/output ports of the switching circuits, control signal transfer paths of m-bit unit connected to each of the input/output ports of the control circuits and back-up transfer paths of m-bit unit connected to each of the input/output ports of the back-up circuits; and transfer path processing circuit connected correspondingly to the connection lines constructed by the n-bit provided on each of the processing units, monitored transfer of data and control signal between the processing units through the switching circuit and the control circuit in the crossbar switch, and detected a failure of at least the switching circuit and the control circuit to thereby change the connection of at least one of the failed switching circuit and control circuit to a connection of the back-up circuit.
摘要:
A shared memory multiprocessor (SMP) has efficient access to a main memory included in a particular node and a management of partitions that include the nodes. In correspondence with each page of main memory included in a node, a bit stored in a register indicates if the page has been accessed from any other node. In a case where the bit is "0", a cache coherent command to be sent to the other nodes is not transmitted. The bit is reset by software at the time of initialization and memory allocation, and it is set by hardware when the page of the main memory is accessed from any other node. In a case where the interior of an SMP is divided into partitions, the main memory of each node is divided into local and shared areas, for which respectively separate addresses can be designated. In each node, the configuration information items of the shared area and the local area are stored in registers. The command of access to the shared area is multicast to all of the nodes, whereas the command is multicast only to the nodes within the corresponding partition when the local area is accessed.
摘要:
An information processing apparatus includes a crossbar switch having a plurality of switching circuits for data transfer; connection lines having address data transfer paths of m-bit unit connected to each of the input/output ports of the switching circuits, control signal transfer paths of m-bit unit connected to each of the input/output ports of the control circuits and back-up transfer paths of m-bit unit connected to each of the input/output ports of the back-up circuits; and transfer path processing circuit connected correspondingly to the connection lines constructed by the n-bit provided on each of the processing units, monitored transfer of data and control signal between the processing units through the switching circuit and the control circuit in the crossbar switch, and detected a failure of at least the switching circuit and the control circuit to thereby change the connection of at least one of the failed switching circuit and control circuit to a connection of the back-up circuit.
摘要:
Systems, methods and devices for failure analysis are provided. Using aggregation flow mining (AFM) or a similar method, an integrated mining of flow (IMF) acquires, from each router to be tested, information relating to each flow. The IMF, in relation to each of the routers, obtains distributions of statistical information such as throughput or difference for each flow; calculates, in relation to each of the distributions, a Mahalanobis distance in relation to the expected value of a reference distribution; and makes a comprehensive assessment of the distributions to perform a fault determination. When the fault determination is performed, a normal value of the distribution used for comparison is acquired from AFM and updated through feedback as needed. After the results of fault determination relating to other routers are assessed, the expected value of the standard deviation and the average value of the reference distribution used for comparison are updated.
摘要:
To provide a power management method for an information platform, including: holding system configuration information indicating a correspondence between a logical system and a processing module constituting the logical system; holding power management information indicating a correspondence between information with which a type of the logical system can be specified, an operating condition of the logical system, and first power consumption for operating the logical system; selecting, the processing module which constitutes the logical system specified by a configuration request by referring to the system configuration information when receiving the configuration request of the logical system; calculating the first power consumption for operating the logical system based on the type and the operating condition included in the configuration request, and the power management information; and determining second power consumption to be supplied to the processing module based on the calculated first power consumption and information on the processing modules.
摘要:
A computer system reduces an overhead by using an I/O switch high in versatility when realizing the sharing of an I/O between virtual computers. The system includes a CPU module #0 having plural CPU cores, an AS bridge 15 connected to the CPU cores, and a main memory that can be accessed from the CPU cores or the AS bridge 15, and AS switches SW0 and SW1 that connect the AS bridge 15 of the CPU module #0 and an I/O blade #5. The CPU module #0 has a hypervisor that divides the plural CPU cores and the main memory into plural logical partitions, and the AS bridge 15 adds virtual path information set in each of the logical partitions and path information of from the AS bridge 15 to the I/O blade #5 to the path information of the AS packet to switch over the AS packet between each of the logical partitions and the I/O blade #5 when relaying the AS packet transmitted or received between the logical partitions and the I/O blade #5.
摘要:
A load distribution method is adopted by a client-server system comprising a plurality of clients 100 and a server cluster 1100, which includes a plurality of servers 800 each used for processing requests made by the clients 100 and allows the number of the servers 800 to be changed dynamically. Each of the clients 100 detects the number of servers 800 composing the server cluster 1100, sets an allocation of requests transmissible out to a newly added server 900 at a value small in comparison with that set for each of the other servers 800 right after detecting an increase in server count and then transmits out requests to the servers on the basis of the set allocation. It is thus possible to provide the clients 100 and the server-cluster system 1100 with the load distribution method suitable for a cluster reconfiguration technology for changing the number of servers composing the server-cluster system 1100 in accordance with an increase and a decrease in demand for a service.
摘要:
A computer system reduces an overhead by using an I/O switch high in versatility when realizing the sharing of an I/O between virtual computers. The system includes a CPU module #0 having plural CPU cores, an AS bridge 15 connected to the CPU cores, and a main memory that can be accessed from the CPU cores or the AS bridge 15, and AS switches SW0 and SW1 that connect the AS bridge 15 of the CPU module #0 and an I/O blade #5. The CPU module #0 has a hypervisor that divides the plural CPU cores and the main memory into plural logical partitions, and the AS bridge 15 adds virtual path information set in each of the logical partitions and path information of from the AS bridge 15 to the I/O blade #5 to the path information of the AS packet to switch over the AS packet between each of the logical partitions and the I/O blade #5 when relaying the AS packet transmitted or received between the logical partitions and the I/O blade #5.