27 lines
1.2 KiB
HTML
27 lines
1.2 KiB
HTML
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<!-- $NetBSD: kernpps.html,v 1.1 1998/12/30 20:20:35 mcr Exp $ -->
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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML Strict//EN">
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<html><head><title>
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A Kernel Programming Interface for Precision Time Signals
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Network Performance Evaluation
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</title></head><body><h3>
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A Kernel Programming Interface for Precision Time Signals
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</h3><hr>
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<p>The technical memorandum: <cite>A Kernel Programming Interface for
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Precision Time Signals</cite><a
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href="ftp://ftp.udel.edu/pub/people/mills/memos/memo96c.ps">
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(PostScript) </a> describes a proposed programming interface for
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external precision time signals, such as the pulse-per-second (PPS)
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signal generated by some radio clocks and cesium oscillators.
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<p>The memorandum argues for a generic capability in the ubiquitous Unix
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kernel, which could be used for a wide variety of measurement
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applications, including network time synchronization and experiments
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involving performance measurement and evaluation of computer networks
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and transmission systems. The hardware to do this requires only a serial
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port and a modem control lead, such as the data carrier detect (DCD)
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lead, which can be driven by an external source via a level
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converter/pulse generator.
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<hr><address>David L. Mills (mills@udel.edu)</address></body></html>
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