Compression measurement for computer servers

Patent metadata

Field	Value
Publication number	US-11093133-B2
Application number	US-201916286749-A
Country	US
Kind code	B2
Filing date	Feb 27, 2019
Priority date	Feb 27, 2019
Publication date	Aug 17, 2021
Grant date	Aug 17, 2021

Abstract

According to one or more embodiments of the present invention, computer implemented method includes obtaining by an input/output (I/O) subsystem a request block that includes a command code indicating a STORE IOP-UTILIZATION DATA command for tracking resource utilization during an asynchronous execution of an instance of a CPU DEFLATE command. The method further includes, based on the command code, initiating a command response block. The command response block includes multiple entries for input/output processor (IOP) utilization, each entry corresponding to resource utilization measurements of each IOP in the I/O subsystem. The method further includes, storing, in a command response code field of the command response block, a response code indicating that the resource utilization measurements have been recorded in the entries for IOP utilization. The response block includes a length code indicating a length of the response block and the response code field.

First claim

What is claimed is:

1. A computer implemented method comprising:
obtaining by an input/output (I/O) subsystem a request block, the request block comprising a command code indicating a STORE IOP-UTILIZATION DATA command for tracking resource utilization during an asynchronous execution of an instance of a CPU DEFLATE command;
based on the command code, initiating a command response block that comprises a plurality of entries for input/output processor (IOP) utilization, each entry corresponding to resource utilization measurements of an IOP in the I/O subsystem to execute the CPU DEFLATE command, each entry includes an IOP-identifier and a number of times the IOP corresponding to the IOP-identifier is used to execute the CPU DEFLATE command; and
storing, in a command response code field of the command response block, a response code indicating that the resource utilization measurements have been recorded in the entries for IOP utilization, the response block having a length code indicating a length of the response block and the response code field,
wherein:
the resource utilization measurements comprise a compress-operation counter that indicates a count of compress operation requests received by said IOP, a decompress-operation counter that indicates a count of decompress operation requests received by said IOP, a compress-operation-input-data counter that indicates a count of a number of blocks of input data consumed by a compress operation performed by said IOP, the blocks being of a predetermined size, a decompress-operation-input-data counter that indicates a count of a number of blocks of input data consumed by a decompress operation performed by said IOP, the blocks being of a predetermined size and a compress-operation-output-data counter that indicates a count of a number of blocks of output data provided by a compress operation performed by said IOP, the blocks being of a predetermined size,
the compress-operation counter, the decompress-operation counter, the compress-operation-input-data counter, the decompress-operation-input-data counter and the compress-operation-output-data counter are provided sequentially in last five fields of an extended asynchronous data mover (EADM) facility, and
the EADM facility comprises start subchannel (SSCH) and sample counts in sequential first two fields and a function pending time in a field interposed between the sample count field and the field in which the compress operation counter is provided.

2. The computer implemented method of claim 1 , wherein an entry for IOP utilization includes an identifier of an IOP and resource utilization measurements for said IOP.

3. The computer implemented method of claim 1 , wherein the compress-operation counter is incremented by one for each compress operation request.

4. The computer implemented method of claim 1 , wherein the decompress-operation counter is incremented by one for each decompress operation request.

5. The computer implemented method of claim 1 , wherein the compress-operation-input-data counter is incremented by one for each 4 KB block of data consumed by compress operations.

6. The computer implemented method of claim 1 , wherein the decompress-operation-input-data counter is incremented by one for each 4 KB block of data consumed by decompress operations.

7. The computer implemented method of claim 1 , wherein the compress-operation-output-data counter is incremented by one for each 4 KB block of output data provided by compress operations.

8. The computer implemented method of claim 1 , wherein the decompress-operation-output-data counter is incremented by one for each 4 KB block of output data provided by decompress operations.

9. The computer implemented method of claim 1 , wherein the resource utilization measurements for an IOP accumulates values for measurement data that accrue during performance of CPU DEFLATE command during an I/O operation or chain of I/O operations initiated by START SUBCHANNEL command.

10. The computer implemented method of claim 1 , wherein the initiating comprises performing one or more validity checks, and continuing to retrieve the utilization measurements based on the one or more validity checks being successful, wherein the one or more validity checks comprises a check of a length field of the request block, and a check that the request block has a valid format.

11. The computer implemented method of claim 1 , wherein the initiating comprises performing one or more validity checks, and continuing to retrieve the utilization measurements based on the one or more validity checks being successful, wherein the one or more validity checks comprises determining that a compression measurement facility is installed.

12. A system comprising:
a memory;
one or more processors; and
an input/output (I/O) subsystem for executing a STORE IOP-UTILIZATION DATA command for measuring input/output processor (IOP) utilization during an asynchronous execution of an instance of a CPU DEFLATE command during asynchronous data moves in the memory by performing a method comprising:
obtaining by the input/output (I/O) subsystem a request block, the request block comprising a command code indicating the STORE IOP-UTILIZATION DATA command;
based on the command code, initiating a command response block, the command response block comprising a plurality of entries for IOP utilization measurements, each entry corresponding to resource utilization measurements of an IOP in the I/O subsystem to execute the CPU DEFLATE command, each entry includes an IOP-identifier and a number of times the IOP corresponding to the IOP-identifier is used to execute the CPU DEFLATE command; and
storing, in a command response code field of a response block, a response code indicating that the resource utilization measurements have been recorded in the entries for IOP utilization, the response block having a length code indicating a length of the response block and the response code field,

wherein:
the resource utilization measurements comprise a compress-operation counter that indicates a count of compress operation requests received by said IOP, a decompress-operation counter that indicates a count of decompress operation requests received by said IOP, a compress-operation-input-data counter that indicates a count of a number of blocks of input data consumed by a compress operation performed by said IOP, the blocks being of a predetermined size, a decompress-operation-input-data counter that indicates a count of a number of blocks of input data consumed by a decompress operation performed by said IOP, the blocks being of a predetermined size and a compress-operation-output-data counter that indicates a count of a number of blocks of output data provided by a compress operation performed by said IOP, the blocks being of a predetermined size,
the compress-operation counter, the decompress-operation counter, the compress-operation-input-data counter, the decompress-operation-input-data counter and the compress-operation-output-data counter are provided sequentially in last five fields of an extended asynchronous data mover (EADM) facility, and the EADM facility comprises start subchannel (SSCH) and sample counts in sequential first two fields and a function pending time in a field interposed between the sample count field and the field in which the compress operation counter is provided.

13. The system of claim 12 , wherein the compress-operation counter is incremented by one for each compress operation request.

14. The system of claim 12 , wherein the decompress-operation counter is incremented by one for each decompress operation request.

Assignees

• IBM

Inventors

• Gomes Louis P
• Sofia Anthony Thomas

Classifications

• G06F3/0605 Primary

  by facilitating the interaction with a user or administrator · CPC title

• G06F3/061

  Improving I/O performance · CPC title

• G06F3/067

  Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS] · CPC title

• G06F3/0659

  Command handling arrangements, e.g. command buffers, queues, command scheduling · CPC title

• G06F3/0608 Primary

  Saving storage space on storage systems · CPC title