Browse Prior Art Database

Response Time Distribution Feature

IP.com Disclosure Number: IPCOM000087608D
Original Publication Date: 1977-Feb-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Hennet, PP: AUTHOR [+2]

Abstract

This article describes an improvement to the hardware monitor described in the IBM Technical Disclosure Bulletin, Vol. 18, No. 6, November 1976, pp. 1950, 1951. This article provides the addition of a pluggable feature to the accumulative distribution decoder (hereafter called the distribution decoder) for trapping and recording response time distribution data as it occurs on an active CPU integrated channel. This feature reformats, encodes and presents the trapped data in an 8-bit format which enables the distribution decoder to recognize, count and output channel activity.

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Response Time Distribution Feature

This article describes an improvement to the hardware monitor described in the IBM Technical Disclosure Bulletin, Vol. 18, No. 6, November 1976, pp. 1950, 1951. This article provides the addition of a pluggable feature to the accumulative distribution decoder (hereafter called the distribution decoder) for trapping and recording response time distribution data as it occurs on an active CPU integrated channel. This feature reformats, encodes and presents the trapped data in an 8-bit format which enables the distribution decoder to recognize, count and output channel activity.

This feature may be put on a single circuit board which is added to the distribution decoder.

Attachment to multiple channels is provided by plural probe units 11. One channel is selected by the channel select circuitry 12, encoded into a 4-bit select code by encoder 13, and placed on the decoder's data input bus 14. The groups of counters activated by selection of a channel A-E is as follows; Channel A = Counters 10-16 Channel B = Counters 20-26 Channel C = Counters 30-36 Channel D = Counters 40-46 Channel E = Counters 50-56.

Also, selected data and timing information detected in probe inputs 11 is logically combined and timed in unit 15, encoded into a 4-bit data code by unit counter select encoder 16 and placed on the distribution decoder's data input bus
14. Encoder 16 selects a prioritized order for encoding the data format. The priority order 0-6 is as...