# US 10,120,822 B2 · Synchronous input/output measurement data

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- Number: US 10,120,822 B2
- Document ID: US10120822B2
- Status: Granted
- Kind: B2
- Application number: 14/872,996
- Filed: 2015-10-01
- Published: 2017-04-06
- Granted: 2018-11-06
- Earliest claimed: 2015-10-01
- Assignees: International Business Machines Corporation
- Applicants: International Business Machines Corporation
- Inventors: David F. Craddock; Beth A. Glendening; Dale F. Riedy; Peter G. Sutton; Harry M. Yudenfriend
- Web page: https://patentgrep.com/patent/US10120822B2

## CPC

- G06F 13/366: using a centralised polling arbiter
- G06F 11/0766: {Error or fault reporting or storing}
- G06F 11/3027: {where the computing system component is a bus}
- G06F 11/3041: {where the computing system component is an input/output interface (interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units G06F13/00)}
- G06F 11/3485: {for I/O devices}
- G06F 11/349: {for interfaces, buses}
- G06F 13/1689: {Synchronisation and timing concerns (synchronisation on a memory bus G06F13/4234)}
- G06F 13/4068: {Electrical coupling}
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

Aspects include acquiring measurement data of a synchronous input/output (I/O) link between an operating system and a recipient. The acquiring measurement data can include monitoring operating system usage of synchronous I/O commands on the synchronous I/O link and storing the operating system usage in a measurement block as the measurement data. Further, the measurement block is accessible by the operating system to determine that the measurement data is acquired.

## Claims

### Claim 1

A computer program product, the computer program product comprising a computer readable storage medium having program instructions for acquiring measurement data of a synchronous input/output (I/O) link between an operating system and a recipient embodied therewith, the operating system and the recipient executing on a processor coupled to a memory, the program instructions executable by the processor to cause the processor to perform:
monitoring operating system usage of synchronous I/O commands on the synchronous I/O link including identifying a plurality of operating systems using the synchronous I/O link,
wherein the plurality of operating systems includes the operating system,
wherein each of a plurality of operating systems is communicatively coupled to peripheral component interconnect function measurement block and corresponds to a separate logical partition of a synchronous system;
storing the operating system usage in a measurement block as the measurement data,
wherein the measurement block is accessed by the operating system to determine that the measurement data is acquired; and
aggregating the operating system usage from the measurement block into a link measurement block,
wherein the link measurement block comprises a peripheral component interconnect function measurement block for the synchronous I/O link that directly measures credentials of the synchronous I/O link by accumulating the measurement data related to each virtual function of each of the plurality of operating systems and the measurement data includes successful commands, processing time, local rejects, remote errors, bytes written, and bytes read for the synchronous I/O link.

### Claim 2 (depends on 1)

The computer program product of claim 1, wherein the synchronous I/O commands correspond to a virtual function associated with a logical partition across the synchronous I/O link.

### Claim 3 (depends on 1)

The computer program product of claim 1, wherein the measurement block is enabled for global reporting.

### Claim 4

A system, comprising a processor and a memory storing program instructions for acquiring measurement data of a synchronous input/output (I/O) link between an operating system and a recipient embodied thereon, the operating system and the recipient executing on the processor, the program instructions executable by a processor to cause the system to perform:
monitoring operating system usage of synchronous I/O commands on the synchronous I/O link including identifying a plurality of operating systems using the synchronous I/O link,
wherein the plurality of operating systems includes the operating system,
wherein each of a plurality of operating systems is communicatively coupled to peripheral component interconnect function measurement block and corresponds to a separate logical partition of a synchronous system;
storing the operating system usage in a measurement block as the measurement data,
wherein the measurement block is accessed by the operating system to determine that the measurement data is acquired; and
aggregating the operating system usage from the measurement block into a link measurement block,
wherein the link measurement block comprises a peripheral component interconnect function measurement block for the synchronous I/O link that directly measures credentials of the synchronous I/O link by accumulating the measurement data related to each virtual function of each of the plurality of operating systems and the measurement data includes successful commands, processing time, local rejects, remote errors, bytes written, and bytes read for the synchronous I/O link.

### Claim 5 (depends on 4)

The system of claim 4, wherein the synchronous I/O commands correspond to a virtual function associated with a logical partition across the synchronous I/O link.

### Claim 6 (depends on 4)

The system of claim 4, wherein the measurement block is enabled for global reporting.