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<!-- Copyright (C) 2003 Red Hat, Inc. --><!-- This material may be distributed only subject to the terms --><!-- and conditions set forth in the Open Publication License, v1.0 --><!-- or later (the latest version is presently available at --><!-- http://www.opencontent.org/openpub/). --><!-- Distribution of the work or derivative of the work in any --><!-- standard (paper) book form is prohibited unless prior --><!-- permission is obtained from the copyright holder. --><HTML><HEAD><TITLE>Board: Intel SA1100 (Brutus)</TITLE><meta name="MSSmartTagsPreventParsing" content="TRUE"><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+"><LINKREL="HOME"TITLE="eCos User Guide"HREF="ecos-user-guide.html"><LINKREL="UP"TITLE="Real-time characterization"HREF="real-time-characterization.html"><LINKREL="PREVIOUS"TITLE="Board: Intel SA1110 (Assabet)"HREF="rt-arm-assabet.html"><LINKREL="NEXT"TITLE="Board: Motorola MBX"HREF="rt-ppc-mbx860.html"></HEAD><BODYCLASS="SECT1"BGCOLOR="#FFFFFF"TEXT="#000000"LINK="#0000FF"VLINK="#840084"ALINK="#0000FF"><DIVCLASS="NAVHEADER"><TABLESUMMARY="Header navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><THCOLSPAN="3"ALIGN="center">eCos User Guide</TH></TR><TR><TDWIDTH="10%"ALIGN="left"VALIGN="bottom"><AHREF="rt-arm-assabet.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom">Appendix B. Real-time characterization</TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="rt-ppc-mbx860.html"ACCESSKEY="N">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><DIVCLASS="SECT1"><H1CLASS="SECT1"><ANAME="RT-ARM-BRUTUS">Board: Intel SA1100 (Brutus)</H1><TABLEBORDER="5"BGCOLOR="#E0E0F0"WIDTH="70%"><TR><TD><PRECLASS="LITERALLAYOUT">Board: Intel SA1100 (Brutus)CPU : StrongARM 221.2 MHzMicroseconds for one run through Dhrystone: 3.3 Dhrystones per Second: 306748.5 VAX MIPS rating = 174.586 Startup, main stack : stack used 404 size 2400Startup : Interrupt stack used 136 size 4096Startup : Idlethread stack used 87 size 2048eCos Kernel TimingsNotes: all times are in microseconds (.000001) unless otherwise statedReading the hardware clock takes 0 `ticks' overhead... this value will be factored out of all other measurementsClock interrupt took 3.09 microseconds (11 raw clock ticks)Testing parameters: Clock samples: 32 Threads: 64 Thread switches: 128 Mutexes: 32 Mailboxes: 32 Semaphores: 32 Scheduler operations: 128 Counters: 32 Alarms: 32 Confidence Ave Min Max Var Ave Min Function ====== ====== ====== ====== ========== ======== 6.63 5.43 18.99 0.77 70% 37% Create thread 0.83 0.81 2.17 0.04 98% 98% Yield thread [all suspended] 1.27 0.81 5.15 0.30 68% 73% Suspend [suspended] thread 1.25 0.81 5.15 0.25 82% 1% Resume thread 1.52 1.09 7.87 0.30 78% 75% Set priority 0.97 0.54 2.71 0.28 64% 51% Get priority 3.45 2.71 19.53 0.66 84% 76% Kill [suspended] thread 0.90 0.81 6.24 0.17 98% 98% Yield [no other] thread 1.86 1.36 6.24 0.33 68% 50% Resume [suspended low prio] thread 1.25 0.81 5.15 0.25 82% 1% Resume [runnable low prio] thread 2.01 1.63 10.04 0.32 70% 84% Suspend [runnable] thread 0.90 0.81 6.24 0.17 98% 98% Yield [only low prio] thread 1.25 0.81 5.15 0.24 84% 1% Suspend [runnable->not runnable] 2.92 1.90 18.72 0.57 85% 43% Kill [runnable] thread 2.45 1.90 10.31 0.33 95% 54% Destroy [dead] thread 3.95 2.71 23.60 0.89 68% 54% Destroy [runnable] thread 8.55 6.24 19.53 1.15 60% 23% Resume [high priority] thread 1.85 1.63 11.94 0.21 49% 49% Thread switch 0.25 0.00 1.63 0.05 89% 10% Scheduler lock 0.52 0.27 1.90 0.07 85% 13% Scheduler unlock [0 threads] 0.51 0.27 1.36 0.06 85% 13% Scheduler unlock [1 suspended] 0.51 0.27 1.36 0.06 85% 13% Scheduler unlock [many suspended] 0.51 0.27 1.63 0.06 85% 13% Scheduler unlock [many low prio] 0.58 0.27 3.53 0.20 71% 21% Init mutex 1.07 0.54 5.70 0.35 87% 59% Lock [unlocked] mutex 1.14 0.81 6.51 0.40 96% 81% Unlock [locked] mutex 0.96 0.54 5.15 0.34 68% 65% Trylock [unlocked] mutex 0.94 0.54 4.88 0.34 65% 65% Trylock [locked] mutex 0.33 0.27 2.17 0.11 96% 96% Destroy mutex 4.21 3.80 10.85 0.41 71% 96% Unlock/Lock mutex 0.76 0.54 4.07 0.25 96% 56% Create mbox 0.75 0.54 1.90 0.20 84% 50% Peek [empty] mbox 1.56 1.09 6.78 0.39 68% 59% Put [first] mbox 0.75 0.54 1.90 0.20 84% 50% Peek [1 msg] mbox 1.55 1.09 6.78 0.40 68% 62% Put [second] mbox 0.77 0.54 1.63 0.17 46% 37% Peek [2 msgs] mbox 1.67 1.09 6.24 0.31 87% 34% Get [first] mbox 1.63 1.09 6.24 0.31 75% 34% Get [second] mbox 1.50 1.09 6.51 0.40 56% 62% Tryput [first] mbox 1.58 1.09 5.43 0.37 68% 53% Peek item [non-empty] mbox 1.79 1.09 7.05 0.43 71% 25% Tryget [non-empty] mbox 1.29 1.09 5.15 0.32 87% 87% Peek item [empty] mbox 1.33 1.09 5.97 0.37 96% 84% Tryget [empty] mbox 0.73 0.54 1.90 0.21 84% 56% Waiting to get mbox 0.76 0.54 1.90 0.19 40% 43% Waiting to put mbox 1.47 1.09 6.78 0.39 59% 84% Delete mbox 2.70 2.17 12.75 0.63 96% 96% Put/Get mbox 0.47 0.27 2.71 0.20 96% 50% Init semaphore 0.89 0.54 4.88 0.33 56% 75% Post [0] semaphore 0.96 0.54 5.15 0.33 71% 75% Wait [1] semaphore 0.86 0.54 4.88 0.32 96% 81% Trywait [0] semaphore 0.69 0.54 3.26 0.22 96% 75% Trywait [1] semaphore 0.49 0.27 3.26 0.28 84% 84% Peek semaphore 0.39 0.27 2.44 0.19 96% 78% Destroy semaphore 2.83 2.44 11.66 0.55 96% 96% Post/Wait semaphore 0.52 0.27 3.26 0.20 56% 40% Create counter 0.59 0.00 2.71 0.34 81% 46% Get counter value 0.36 0.00 2.44 0.21 81% 9% Set counter value 1.13 0.81 2.98 0.26 59% 37% Tick counter 0.39 0.27 1.90 0.19 90% 78% Delete counter 0.86 0.54 4.07 0.24 65% 31% Create alarm 1.86 1.36 9.77 0.54 96% 90% Initialize alarm 0.77 0.54 2.71 0.23 84% 50% Disable alarm 1.86 1.36 9.22 0.51 96% 75% Enable alarm 0.89 0.54 3.26 0.25 65% 21% Delete alarm 0.99 0.81 3.26 0.21 96% 59% Tick counter [1 alarm] 4.22 4.07 6.78 0.22 96% 71% Tick counter [many alarms] 1.51 1.36 4.61 0.24 96% 78% Tick & fire counter [1 alarm] 20.29 20.07 23.33 0.23 96% 53% Tick & fire counters [>1 together] 4.71 4.61 7.87 0.20 96% 96% Tick & fire counters [>1 separately] 2.88 2.71 23.87 0.33 99% 99% Alarm latency [0 threads] 3.24 2.71 17.36 0.40 79% 58% Alarm latency [2 threads] 15.71 12.48 27.40 1.47 53% 17% Alarm latency [many threads] 5.95 5.43 64.56 1.02 97% 97% Alarm -> thread resume latency 3.25 0.81 14.11 0.00 Clock/interrupt latency 2.68 1.09 12.75 0.00 Clock DSR latency 29 0 316 (main stack: 764) Thread stack used (1120 total)All done, main stack : stack used 764 size 2400All done : Interrupt stack used 288 size 4096All done : Idlethread stack used 260 size 2048Timing complete - 30280 ms total </PRE></TD></TR></TABLE></DIV><DIVCLASS="NAVFOOTER"><HRALIGN="LEFT"WIDTH="100%"><TABLESUMMARY="Footer navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><AHREF="rt-arm-assabet.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="ecos-user-guide.html"ACCESSKEY="H">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><AHREF="rt-ppc-mbx860.html"ACCESSKEY="N">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">Board: Intel SA1110 (Assabet)</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="real-time-characterization.html"ACCESSKEY="U">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">Board: Motorola MBX</TD></TR></TABLE></DIV></BODY></HTML>⌨️ 快捷键说明
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