I/o processor

Abstract

An IO processor includes an embedded central processing unit (CPU), a switch connected to the embedded CPU, an external CPU bus controller connected to the switch for optionally connecting to an external CPU, a first memory controller connected to the switch for connecting to a first memory, and a second memory controller connected to the switch for optionally connecting to a second memory. The IO processor may be connected to the external CPU, to the second memory, or be capable of connecting to external CPUs of different ranks, depending on the situation, so as to meet the cost considerations and the actual application requirements.

Description

technical field [0001] The present invention relates to an input and output processor (IO Processor), in particular to an I / O processor with an embedded central processing unit (embedded CPU) inside and can be selectively connected to an external central processing unit (external CPU). device. Background technique [0002] In traditional storage virtualization systems, or because only software (software) is used to process a large number of input / output (Input / Output, IO) programs, the central processing unit (CPU) spends a lot of time on processing IO programs, resulting in a decrease in the overall performance of the system. Low; or due to the lack of dedicated IO processors in the storage virtualization controller (Storage Virtualization Controller, SVC), resulting in complex electrical circuits within the storage virtualization controller and increased costs; or due to the storage virtualization controller (SVC) It is equipped with a dedicated IO processor. Although it ...

AI Technical Summary

Problems solved by technology

[0002] In traditional storage virtualization systems, or because only software (software) is used to process a large number of input / output (Input / Output, IO) programs, the central processing unit (CPU) spends a lot of time on processing IO programs, resulting in a decrease in the overall performance of the system. Low; or due to the lack of a dedicated IO processor in the storage virtualization controller (Storage Virtualization Controller, SVC), resulting in complex electrical circuits within the storage virtualization controller and increased costs; or due to the storage virtualization controller (SVC) It is equipped with a dedicated IO processor. Although it has an embedded CPU, it has no CPU scalability. However, due to the development of the network, requests from many host systems need to be processed at the same time, and a large amount of data is moved. , calculation, interrupt and other instructions, only relying on an embedded CPU to process all the programs is not enough to meet the actual application needs, the overall performance of the system is not good, and the performance of the IO processor has become the bottleneck of the system

[0003] In addition, if the IO processor in the traditional storage virtualization controller is equipped with an external CPU with a dual-core architecture to process the IO program, although the processing speed is fast, the cost is high. When one of the internal CPUs fails, The external CPU of the dual-core architecture needs to be completely replaced, and only the faulty CPU cannot be replaced.

And when the CPU load is too heavy or too light, an external CPU of the dual-core architecture cannot be flexibly replaced with one of the CPUs to meet cost considerations and actual application requirements

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