HP-UX IPQoS Performance and Sizing White Paper

ManualsBrandsHP ManualsSoftwareHP-UX 11i IPQos Software

November 2005

Abstract.............................................................................................................................................. 2

Introduction......................................................................................................................................... 2

Tool Used for Measuring Performance.................................................................................................... 3

Test Configuration................................................................................................................................ 3

Interpretation of Results......................................................................................................................... 4

Raw Data ........................................................................................................................................... 5

Future Tests ......................................................................................................................................... 7

Summary of content (7 pages)

PAGE 1
HP-UX IPQoS Performance and Sizing White Paper November 2005 Abstract.............................................................................................................................................. 2 Introduction......................................................................................................................................... 2 Tool Used for Measuring Performance....................................................................................................
PAGE 2
Abstract This document outlines the performance impact of HP-UX IPQoS on an HP-UX system. It is divided into five sections. The first section is an introduction to IPQoS; the second section is about the tool used for the tests; the third section gives an overview of test configuration; the fourth section gives an interpretation of the test results; the fifth section contains raw test result data in tabular form; and the last section gives some suggestions for further study.
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Tool Used for Measuring Performance The tool used for measuring the performance of HP-UX IPQoS is netperf. Developed by HP, this tool is distributed in source form at www.netperf.org. This site is informally maintained by Hewlett-Packard. The netperf tool has two executables: netperf and netserver. netserver can run as a child process to inetd. In that case, netserver should be added to the /etc/inetd.conf file. netserver can also run as a standalone daemon. Two systems are required to test HP-UX IPQoS.
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This filter and policy rewrites the TOS value on every TCP packet. Note: rewriting the TOS value in IP packet involves recalculating and resetting the checksum value for each IP packet. Interpretation of Results netperf does not provide per packet processing numbers. Service demand numbers are the closest approximation to the per packet overhead. Service demand indicates the amount of processing done per 1KB of data.
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Raw Data This section provides raw data in tabular format to illustrate results described in the previous section. (100BaseT interface ) Throughput Utilization 10^6 Send Bits/s Local 30.29 41.79 60.11 31.72 94.07 15.69 75.38 8.93 92.45 7.58 92.28 5.19 94.23 2.53 Service Demand Local 456.731 162.308 54.645 38.993 26.908 18.418 8.
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Raw data for GIGE-bit interface: Without IPQoS Send Elapsed Msg Time Size (sec) 32 60.01 64 60.01 128 60.01 256 60.01 512 60.01 1024 60.01 2920 60.01 (1000BaseT Throughput 10^6 Bits/s 30.35 61.04 113.99 218.35 405.24 754.00 922.74 interface Utilization Send Local 38.40 36.92 39.52 38.69 36.93 34.87 19.
PAGE 7
Future Tests The following are ideas for tests that may be performed sometime in the future: • • • • • • Test to determine the performance impact of HP-UX IPQoS with longer and more complex filters Test to determine the performance impact of HP-UX IPQoS on UDP packets Test to determine the performance impact of HP-UX IPQoS on TCP request/response mechanism Test to determine the performance impact of HP-UX IPQoS with non-matching filters Test to determine the performance impact of HP-UX IPQoS with fragmente