Computer and method of controlling I/O switch of computer
A computer achieves an increase in throughput by controlling a connection state between each port of an I/O controller and an I/O switch, thereby improving throughput imbalance between the ports of the I/O controller. The computer is provided with: an I/O switch; an I/O device connected to the I/O switch; a management controller; and an I/O controller including a plurality of ports. The management controller detects a connection state with the I/O switch, and acquires the number of virtual switches associated with the detected connection state with the I/O switch by referring to configuration management information for managing the connection state with the I/O switch in association with the number of the virtual switches. The management controller sets the acquired number of the virtual switches for each I/O switch that is connected. Each port of the I/O controller connects with the I/O device via the virtual switches that are set.
1. A computer comprising:
one or more I/O switches;
a multiplexer;
one or more I/O devices which are connected to the one or more I/O switches;
a management controller which is configured to:
store configuration management information for managing a connection state with the one or more I/O switches, a number of virtual switches, and a setting value of the multiplexer in association with each other,
detect the connection state with the one or more I/O switches, and acquire the number of virtual switches and the setting value of the multiplexer corresponding to the detected connection state with the I/O switches by referring to the configuration management information, and
set the acquired number of virtual switches for each of the connected one or more I/O switches and set the acquired setting value for the multiplexer;
an I/O controller which has a plurality of ports configured to be connected to the connected one or more I/O devices via the set virtual switches and the set multiplexer; and
wherein the multiplexer is connected to each of the ports and each of the connected one or more I/O switches, and
wherein the set virtual switches and the set multiplexer are configured to connect a same number of the ports to each of the connected one or more I/O switches based on the acquired number of virtual switches and the acquired setting value.
2. A method of controlling a computer including one or more I/O switches, one or more I/O devices connected to the one or more I/O switches, a management controller, a multiplexer, and an I/O controller, the method comprising the steps of:
detecting a connection state with the one or more I/O switches, by the management controller;
acquiring a number of virtual switches and a setting value of the multiplexer corresponding to the detected connection state with the one or more I/O switches in association with each other by referring to configuration management information for managing the connection state with the one or more I/O switches, the number of virtual switches, and the setting value of the multiplexer in association with each other, by the management controller;
setting the acquired number of virtual switches for each of the connected one or more I/O switches and setting the acquired setting value for the multiplexer, by the management controller; and
connecting each of a plurality of ports of the I/O controller to the connected one or more I/O devices via the set virtual switches and the set multiplexer,
wherein the multiplexer is connected to each of the ports and each of the connected one or more I/O switches, and
wherein the set virtual switches and the set multiplexer connect a same number of the ports to each of the connected one or more I/O switches based on the acquired number of virtual switches and the acquired setting value.
3. The computer according to claim 1 , wherein the one or more I/O switches are PCI express switches.
4. The computer according to claim 1 , wherein the multiplexer and a first I/O switch of the one or more I/O switches are configured in a PCI express I/F adaptor.
5. The computer according to claim 4 , wherein the PCI express I/F adaptor includes a plurality of external ports which are configured to be connected to the one or more I/O switches.
6. The computer according to claim 1 , wherein each of the one or more I/O switches are configured in a respective one or more PCI express I/F adaptors.
7. The computer according to claim 2 , wherein the one or more I/O switches are PCI express switches.
8. The computer according to claim 2 , wherein the multiplexer and a first I/O switch of the one or more I/O switches are configured in a PCI express I/F adaptor.
9. The computer according to claim 8 , wherein the PCI express I/F adaptor includes a plurality of external ports which are configured to be connected to the one or more I/O switches.
10. The computer according to claim 2 , wherein each of the one or more I/O switches are configured in a respective one or more PCI express I/F adaptors.