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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: Atmel AT91/EB40</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="Real-time characterization"HREF="real-time-characterization.html"><LINKREL="NEXT"TITLE="Board: Intel StrongARM EBSA-285 Evaluation Board"HREF="rt-arm-ebsa285.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="real-time-characterization.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-arm-ebsa285.html"ACCESSKEY="N">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><DIVCLASS="SECT1"><H1CLASS="SECT1"><ANAME="RT-AT91-EB40">Board: Atmel AT91/EB40</H1><TABLEBORDER="5"BGCOLOR="#E0E0F0"WIDTH="70%"><TR><TD><PRECLASS="LITERALLAYOUT">Board: Atmel AT91/EB40CPU : AT91R40807 (ARM7TDMI core), 32MHz512KB RAM, 64K FlashStartup, main stack : stack used 420 size 2400Startup : Interrupt stack used 144 size 4096Startup : Idlethread stack used 84 size 2048eCos Kernel TimingsNotes: all times are in microseconds (.000001) unless otherwise statedReading the hardware clock takes 3 'ticks' overhead... this value will be factored out of all other measurementsClock interrupt took 127.53 microseconds (130 raw clock ticks)Testing parameters: Clock samples: 32 Threads: 25 Thread switches: 128 Mutexes: 32 Mailboxes: 32 Semaphores: 32 Scheduler operations: 128 Counters: 32 Alarms: 32 Confidence Ave Min Max Var Ave Min Function ====== ====== ====== ====== ========== ======== 86.48 71.29 101.56 7.99 48% 28% Create thread 20.70 20.51 21.48 0.31 80% 80% Yield thread [all suspended] 17.15 16.60 17.58 0.48 56% 44% Suspend [suspended] thread 17.07 16.60 17.58 0.49 52% 52% Resume thread 25.51 25.39 26.37 0.21 88% 88% Set priority 3.16 2.93 3.91 0.36 76% 76% Get priority 52.34 51.76 52.73 0.47 60% 40% Kill [suspended] thread 20.70 20.51 21.48 0.31 80% 80% Yield [no other] thread 28.98 28.32 30.27 0.48 60% 36% Resume [suspended low prio] thread 17.11 16.60 17.58 0.49 52% 48% Resume [runnable low prio] thread 27.85 26.37 28.32 0.52 96% 4% Suspend [runnable] thread 20.70 20.51 21.48 0.31 80% 80% Yield [only low prio] thread 17.23 16.60 17.58 0.45 64% 36% Suspend [runnable->not runnable] 52.34 51.76 52.73 0.47 60% 40% Kill [runnable] thread 33.01 32.23 33.20 0.31 80% 20% Destroy [dead] thread 72.03 70.31 72.27 0.38 80% 4% Destroy [runnable] thread 96.99 95.70 112.30 1.22 64% 96% Resume [high priority] thread 51.48 49.80 164.06 1.76 99% 99% Thread switch 2.78 1.95 2.93 0.26 84% 15% Scheduler lock 11.81 11.72 12.70 0.17 90% 90% Scheduler unlock [0 threads] 11.81 11.72 12.70 0.17 90% 90% Scheduler unlock [1 suspended] 11.81 11.72 12.70 0.17 90% 90% Scheduler unlock [many suspended] 11.81 11.72 12.70 0.17 90% 90% Scheduler unlock [many low prio] 5.49 4.88 5.86 0.46 62% 37% Init mutex 20.20 19.53 20.51 0.42 68% 31% Lock [unlocked] mutex 24.44 24.41 25.39 0.06 96% 96% Unlock [locked] mutex 18.25 17.58 18.55 0.42 68% 31% Trylock [unlocked] mutex 16.11 15.63 16.60 0.49 100% 50% Trylock [locked] mutex 6.10 5.86 6.84 0.37 75% 75% Destroy mutex 124.21 124.02 125.00 0.30 81% 81% Unlock/Lock mutex 9.28 8.79 9.77 0.49 100% 50% Create mbox 2.93 2.93 2.93 0.00 100% 100% Peek [empty] mbox 22.58 22.46 23.44 0.21 87% 87% Put [first] mbox 2.44 1.95 2.93 0.49 100% 50% Peek [1 msg] mbox 22.58 22.46 23.44 0.21 87% 87% Put [second] mbox 2.44 1.95 2.93 0.49 100% 50% Peek [2 msgs] mbox 22.71 22.46 23.44 0.37 75% 75% Get [first] mbox 22.71 22.46 23.44 0.37 75% 75% Get [second] mbox 21.18 20.51 21.48 0.42 68% 31% Tryput [first] mbox 18.98 18.55 19.53 0.48 56% 56% Peek item [non-empty] mbox 22.46 22.46 22.46 0.00 100% 100% Tryget [non-empty] mbox 18.31 17.58 18.55 0.37 75% 25% Peek item [empty] mbox 19.53 19.53 19.53 0.00 100% 100% Tryget [empty] mbox 2.69 1.95 2.93 0.37 75% 25% Waiting to get mbox 2.93 2.93 2.93 0.00 100% 100% Waiting to put mbox 23.86 23.44 24.41 0.48 56% 56% Delete mbox 67.60 67.38 68.36 0.33 78% 78% Put/Get mbox 5.37 4.88 5.86 0.49 100% 50% Init semaphore 16.97 16.60 17.58 0.46 62% 62% Post [0] semaphore 18.98 18.55 19.53 0.48 56% 56% Wait [1] semaphore 15.81 15.63 16.60 0.30 81% 81% Trywait [0] semaphore 15.29 14.65 15.63 0.44 65% 34% Trywait [1] semaphore 5.62 4.88 5.86 0.37 75% 25% Peek semaphore 6.35 5.86 6.84 0.49 100% 50% Destroy semaphore 72.36 72.27 73.24 0.17 90% 90% Post/Wait semaphore 7.08 6.84 7.81 0.37 75% 75% Create counter 3.17 2.93 3.91 0.37 75% 75% Get counter value 3.05 2.93 3.91 0.21 87% 87% Set counter value 24.11 23.44 24.41 0.42 68% 31% Tick counter 5.49 4.88 5.86 0.46 62% 37% Delete counter 10.92 10.74 11.72 0.30 81% 81% Create alarm 31.46 31.25 32.23 0.33 78% 78% Initialize alarm 3.05 2.93 3.91 0.21 87% 87% Disable alarm 31.49 31.25 32.23 0.37 75% 75% Enable alarm 7.02 6.84 7.81 0.30 81% 81% Delete alarm 31.16 30.27 31.25 0.17 90% 9% Tick counter [1 alarm] 309.26 304.69 425.78 7.28 96% 96% Tick counter [many alarms] 44.83 43.95 44.92 0.17 90% 9% Tick & fire counter [1 alarm] 781.68 774.41 893.55 13.62 93% 93% Tick & fire counters [>1 together] 324.16 320.31 433.59 6.84 96% 96% Tick & fire counters [>1 separately] 114.26 113.28 167.97 0.84 57% 42% Alarm latency [0 threads] 126.91 113.28 159.18 8.20 50% 31% Alarm latency [2 threads] 127.11 113.28 158.20 8.09 51% 28% Alarm latency [many threads] 196.49 189.45 331.05 2.10 98% 0% Alarm -> thread resume latency 23.50 23.44 25.39 0.00 Clock/interrupt latency 40.31 33.20 514.65 0.00 Clock DSR latency 300 271 312 (main stack: 832) Thread stack used (1120 total)All done, main stack : stack used 832 size 2400All done : Interrupt stack used 288 size 4096All done : Idlethread stack used 272 size 2048Timing complete - 30350 ms totalPASS:<Basic timing OK>EXIT:<done> </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="real-time-characterization.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-arm-ebsa285.html"ACCESSKEY="N">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">Real-time characterization</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="real-time-characterization.html"ACCESSKEY="U">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">Board: Intel StrongARM EBSA-285 Evaluation Board</TD></TR></TABLE></DIV></BODY></HTML>⌨️ 快捷键说明
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