| 摘要 |
In a lockstep fault-tolerant system (10), each subsystem (1, 2) includes bridges (71 to 75) positioned between a CPU (21) and memory (11), between a CPU (22) and memory (12), between the CPU (21) and a northbridge (31), between the CPU (22) and the northbridge (31) and between the CPU (21) and the CPU (22) and creates checksums from relayed data, and an FT bus (81) for sending the created checksums to an FT controller (41). Furthermore, the FT controller (41) detects discrepancies by comparing checksums sent from the bridges (71 to 75) and checksums sent from the other subsystem received via a crosslink, and by this detects process discrepancies between the subsystems (1, 2). |
