公开(公告)号：JP2002032327A

公开(公告)日：2002-01-31

申请号：JP2001159963

申请日：2001-05-29

Applicant: IBM

Inventor： BUCKLAND PAT ALLEN ,  NEAL DANIEL MARVIN ,  THURBER STEVEN MARK

IPC: G06F13/36 ,  G06F11/34 ,  G06F13/00

Abstract: PROBLEM TO BE SOLVED: To provide an I/O bus bridge having a performance monitoring function. SOLUTION: In this bus bridge 200 used for a data processing system, the bridge includes a primary bus interface 206 connected to a primary bus, a secondary bus interface 208 connected to a secondary bus 204, a performance- monitoring register 218 and a state machine which is connected to the primary and secondary bus interfaces and records the occurrence of an event designated in the register 218. The register 218 receives posted memory write and a read request in disconnection and division response and monitors various event occurrences, such as a retry according to the mode in which the bridge is an operation target or a master.