| 摘要 |
PROBLEM TO BE SOLVED: To determine different bus performance parameters by counting a full period determined in advance and measuring the using state of a bus for data transfer during that full period. SOLUTION: A bridge chip is designed so as to be used while being paired, and a PCI-PCI bridge is formed between a 1st-order PCT bus 24 and a 2nd-order PCI bus 32. Namely, a bridge chip 26 connects the 1st-order PCI bus 24 to a cable 28. Besides, a 2nd-order PCI-PCI bridge 48 is provided inside an extended box and connects the cable 28 to the 2nd-order PCI bus 32. Then, the full period determined in advance is counted by a bus monitor 106 of the bridge chip 26 and a bus monitor 127 of the 2nd PCI-PCI bridge 48, and the using states of the respective buses 24 and 32 for data transfer during that full period are measured. Thus, the different bus performance parameters can be determined. |
