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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: NEC V850 Cosmo Evaluation Board</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: NEC V850 Cosmo Evaluation Board"HREF="rt-v850-cebsa1.html"><LINKREL="NEXT"TITLE="GNU General Public License"HREF="gnu-general-public-license.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-v850-cebsa1.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="gnu-general-public-license.html"ACCESSKEY="N">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><DIVCLASS="SECT1"><H1CLASS="SECT1"><ANAME="RT-V850-CEBSB1">Board: NEC V850 Cosmo Evaluation Board</H1><TABLEBORDER="5"BGCOLOR="#E0E0F0"WIDTH="70%"><TR><TD><PRECLASS="LITERALLAYOUT">Board: NEC V850 Cosmo Evaluation BoardCPU: NEC CEB-V850/SB1 16MHz (in internal Flash)Startup, main stack : stack used 572 size 2936Startup : Interrupt stack used 132 size 4096Startup : Idlethread stack used 210 size 2048eCos Kernel TimingsNotes: all times are in microseconds (.000001) unless otherwise statedReading the hardware clock takes 8 'ticks' overhead... this value will be factored out of all other measurementsClock interrupt took 118.15 microseconds (472 raw clock ticks)Testing parameters: Clock samples: 32 Threads: 7 Thread switches: 128 Mutexes: 32 Mailboxes: 32 Semaphores: 32 Scheduler operations: 128 Counters: 32 Alarms: 32 Confidence Ave Min Max Var Ave Min Function ====== ====== ====== ====== ========== ======== 113.68 111.00 116.50 1.63 42% 28% Create thread 30.00 30.00 30.00 0.00 100% 100% Yield thread [all suspended] 29.57 29.50 29.75 0.10 71% 71% Suspend [suspended] thread 27.43 27.25 27.50 0.10 71% 28% Resume thread 34.11 34.00 34.25 0.12 57% 57% Set priority 1.57 1.50 1.75 0.10 71% 71% Get priority 72.96 72.75 73.00 0.06 85% 14% Kill [suspended] thread 30.00 30.00 30.00 0.00 100% 100% Yield [no other] thread 42.75 42.75 42.75 0.00 100% 100% Resume [suspended low prio] thread 27.00 27.00 27.00 0.00 100% 100% Resume [runnable low prio] thread 43.64 41.25 44.25 0.68 85% 14% Suspend [runnable] thread 30.00 30.00 30.00 0.00 100% 100% Yield [only low prio] thread 29.57 29.50 29.75 0.10 71% 71% Suspend [runnable->not runnable] 72.93 72.75 73.00 0.10 71% 28% Kill [runnable] thread 44.89 44.75 45.75 0.24 85% 85% Destroy [dead] thread 103.00 101.50 103.25 0.43 85% 14% Destroy [runnable] thread 175.21 171.50 197.50 6.37 85% 85% Resume [high priority] thread 84.11 79.50 197.25 1.77 98% 0% Thread switch 1.00 1.00 1.00 0.00 100% 100% Scheduler lock 20.06 20.00 20.25 0.09 75% 75% Scheduler unlock [0 threads] 20.00 20.00 20.00 0.00 100% 100% Scheduler unlock [1 suspended] 20.06 20.00 20.25 0.09 75% 75% Scheduler unlock [many suspended] 20.06 20.00 20.25 0.09 75% 75% Scheduler unlock [many low prio] 4.00 4.00 4.00 0.00 100% 100% Init mutex 33.00 33.00 33.00 0.00 100% 100% Lock [unlocked] mutex 36.77 36.75 37.25 0.03 96% 96% Unlock [locked] mutex 28.13 28.00 28.25 0.13 100% 50% Trylock [unlocked] mutex 25.13 25.00 25.25 0.13 100% 50% Trylock [locked] mutex 4.88 4.75 5.00 0.13 100% 50% Destroy mutex 187.00 187.00 187.00 0.00 100% 100% Unlock/Lock mutex 10.00 10.00 10.00 0.00 100% 100% Create mbox 0.69 0.50 0.75 0.09 75% 25% Peek [empty] mbox 34.75 34.75 34.75 0.00 100% 100% Put [first] mbox 0.69 0.50 0.75 0.09 75% 25% Peek [1 msg] mbox 35.00 35.00 35.00 0.00 100% 100% Put [second] mbox 0.69 0.50 0.75 0.09 75% 25% Peek [2 msgs] mbox 36.00 36.00 36.00 0.00 100% 100% Get [first] mbox 36.00 36.00 36.00 0.00 100% 100% Get [second] mbox 31.00 31.00 31.00 0.00 100% 100% Tryput [first] mbox 29.50 29.50 29.50 0.00 100% 100% Peek item [non-empty] mbox 35.25 35.25 35.25 0.00 100% 100% Tryget [non-empty] mbox 27.69 27.50 27.75 0.09 75% 25% Peek item [empty] mbox 31.06 31.00 31.25 0.09 75% 75% Tryget [empty] mbox 0.94 0.75 1.00 0.09 75% 25% Waiting to get mbox 0.94 0.75 1.00 0.09 75% 25% Waiting to put mbox 37.81 37.75 38.00 0.09 75% 75% Delete mbox 112.00 112.00 112.00 0.00 100% 100% Put/Get mbox 3.19 3.00 3.25 0.09 75% 25% Init semaphore 25.38 25.25 25.50 0.13 100% 50% Post [0] semaphore 32.63 32.50 32.75 0.13 100% 50% Wait [1] semaphore 24.25 24.25 24.25 0.00 100% 100% Trywait [0] semaphore 25.00 25.00 25.00 0.00 100% 100% Trywait [1] semaphore 4.00 4.00 4.00 0.00 100% 100% Peek semaphore 4.88 4.75 5.00 0.13 100% 50% Destroy semaphore 124.50 124.50 124.50 0.00 100% 100% Post/Wait semaphore 6.50 6.50 6.50 0.00 100% 100% Create counter 1.25 1.25 1.25 0.00 100% 100% Get counter value 1.44 1.25 1.50 0.09 75% 25% Set counter value 36.25 36.25 36.25 0.00 100% 100% Tick counter 5.25 5.25 5.25 0.00 100% 100% Delete counter 12.25 12.25 12.25 0.00 100% 100% Create alarm 49.13 49.00 49.25 0.13 100% 50% Initialize alarm 2.81 2.75 3.00 0.09 75% 75% Disable alarm 48.50 48.50 48.50 0.00 100% 100% Enable alarm 8.25 8.25 8.25 0.00 100% 100% Delete alarm 46.50 46.50 46.50 0.00 100% 100% Tick counter [1 alarm] 485.42 482.25 580.00 5.91 96% 96% Tick counter [many alarms] 64.00 64.00 64.00 0.00 100% 100% Tick & fire counter [1 alarm] 1109.76 1100.50 1198.00 16.53 90% 90% Tick & fire counters [>1 together] 505.85 502.00 621.00 7.20 96% 96% Tick & fire counters [>1 separately] 96.26 95.75 161.25 1.02 99% 99% Alarm latency [0 threads] 159.20 95.75 160.75 2.52 97% 0% Alarm latency [2 threads] 159.73 110.50 161.75 1.53 97% 0% Alarm latency [many threads] 218.45 211.25 445.75 3.55 97% 1% Alarm -> thread resume latency 28.24 25.25 43.25 0.00 Clock/interrupt latency 60.15 40.50 221.50 0.00 Clock DSR latency 472 424 572 (main stack: 1052) Thread stack used (1912 total)All done, main stack : stack used 1052 size 2936All done : Interrupt stack used 280 size 4096All done : Idlethread stack used 516 size 2048Timing complete - 30590 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="rt-v850-cebsa1.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="gnu-general-public-license.html"ACCESSKEY="N">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">Board: NEC V850 Cosmo Evaluation 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