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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"> <META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ "><LINK REL="HOME" TITLE="eCos User Guide" HREF="ecos-user-guide.html"><LINK REL="UP" TITLE="Real-time characterization" HREF="real-time-characterization.html"><LINK REL="PREVIOUS" TITLE="Real-time characterization" HREF="real-time-characterization.html"><LINK REL="NEXT" TITLE="Board: Intel StrongARM EBSA-285 Evaluation Board" HREF="rt-arm-ebsa285.html"></HEAD ><BODY CLASS="SECT1" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >eCos User Guide</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="real-time-characterization.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Appendix B. Real-time characterization</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="rt-arm-ebsa285.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="RT-AT91-EB40">Board: Atmel AT91/EB40</H1 ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="LITERALLAYOUT" >Board: Atmel AT91/EB40 CPU : AT91R40807 (ARM7TDMI core), 32MHz 512KB RAM, 64K Flash Startup, main stack : stack used 420 size 2400 Startup : Interrupt stack used 144 size 4096 Startup : Idlethread stack used 84 size 2048 eCos Kernel Timings Notes: all times are in microseconds (.000001) unless otherwise stated Reading the hardware clock takes 3 'ticks' overhead ... this value will be factored out of all other measurements Clock 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 2400 All done : Interrupt stack used 288 size 4096 All done : Idlethread stack used 272 size 2048 Timing complete - 30350 ms total PASS:<Basic timing OK> EXIT:<done> </PRE ></TD ></TR ></TABLE ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="real-time-characterization.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ecos-user-guide.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="rt-arm-ebsa285.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Real-time characterization</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A 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