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>Real-time characterization</TITLE
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>eCos User Guide</TH
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NAME="REAL-TIME-CHARACTERIZATION">Appendix B. Real-time characterization</H1
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><DIV
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CLASS="TOC"
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><DL
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><DT
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><B
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>Table of Contents</B
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></DT
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><DT
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><A
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HREF="real-time-characterization.html#RT-ARM-AEB1"
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>Board: ARM AEB-1 Revision B Evaluation Board</A
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></DT
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><DT
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><A
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HREF="rt-at91-eb40.html"
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>Board: Atmel AT91/EB40</A
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></DT
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><DT
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><A
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HREF="rt-arm-ebsa285.html"
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>Board: Intel StrongARM EBSA-285 Evaluation Board</A
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></DT
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><DT
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><A
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HREF="rt-arm-ep7211.html"
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>Board: Cirrus Logic EDB7111-2 Development Board</A
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></DT
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><DT
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><A
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HREF="rt-arm-pid.html"
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>Board: ARM PID Evaluation Board</A
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></DT
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><DT
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><A
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HREF="rt-arm-iq80310.html"
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>Board: Intel IQ80310 XScale Development Kit</A
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></DT
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><DT
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><A
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HREF="rt-tx39-jmr3904.html"
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>Board: Toshiba JMR3904 Evaluation Board</A
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></DT
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><DT
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><A
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HREF="rt-tx49-ref4955.html"
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>Board: Toshiba REF 4955</A
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></DT
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><DT
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><A
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HREF="rt-mn10300-stdeval1.html"
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>Board: Matsushita STDEVAL1 Board</A
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></DT
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><DT
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><A
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HREF="rt-sparclite-sleb.html"
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>Board: Fujitsu SPARClite Evaluation Board</A
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></DT
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><DT
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><A
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HREF="rt-ppc-cogent.html"
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>Board: Cogent CMA MPC860 (PowerPC) Evaluation</A
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></DT
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><DT
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><A
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HREF="rt-vr4300-vrc4373.html"
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>Board: NEC VR4373</A
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></DT
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><DT
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><A
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HREF="rt-arm-assabet.html"
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>Board: Intel SA1110 (Assabet)</A
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></DT
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><DT
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><A
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HREF="rt-arm-brutus.html"
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>Board: Intel SA1100 (Brutus)</A
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></DT
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><DT
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><A
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HREF="rt-ppc-mbx860.html"
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>Board: Motorola MBX</A
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></DT
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><DT
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><A
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HREF="rt-sh-edk7708.html"
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>Board: Hitachi EDK7708</A
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></DT
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><DT
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><A
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HREF="rt-sh-cq7708.html"
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>Board: CQ CqREEK SH3 Evaluation Board (cq7708)</A
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></DT
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><DT
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><A
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HREF="rt-sh-hs7729pci.html"
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>Board: Hitachi HS7729PCI HS7729 SH3</A
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></DT
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><DT
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><A
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HREF="rt-sh-se7751.html"
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>Board: Hitachi Solution Engine 7751 SH4 (se7751)</A
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></DT
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><DT
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><A
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HREF="rt-i386-pc.html"
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>Board: PC</A
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></DT
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><DT
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><A
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HREF="rt-v850-cebsa1.html"
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>Board: NEC V850 Cosmo Evaluation Board</A
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></DT
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><DT
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><A
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HREF="rt-v850-cebsb1.html"
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>Board: NEC V850 Cosmo Evaluation Board</A
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></DT
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></DL
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></DIV
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><P
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>For a discussion of real-time performance measurement for eCos, see the eCos
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Users' Guide.</P
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><DIV
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CLASS="CAUTION"
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><P
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>Caution</B
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ALIGN="LEFT"
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><P
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>As with the target setup descriptions in the previous appendix, this
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information will eventually be merged into per-target documents.</P
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></TD
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></TR
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></TABLE
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></DIV
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><P
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>       Sample numbers:
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      </P
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><DIV
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CLASS="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="RT-ARM-AEB1">Board: ARM AEB-1 Revision B Evaluation Board</H1
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CLASS="LITERALLAYOUT"
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>&#13;Board: ARM AEB-1 Revision B Evaluation Board
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CPU : Sharp LH77790A 24MHz
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Startup, main stack             : stack used   404 size  2400
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Startup              :  Interrupt stack used   128 size  2048
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Startup              : Idlethread stack used    80 size  2048
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eCos Kernel Timings
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Notes: all times are in microseconds (.000001) unless otherwise stated
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Reading the hardware clock takes 13 'ticks' overhead
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... this value will be factored out of all other measurements
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Clock interrupt took  193.49 microseconds (290 raw clock ticks)
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Testing parameters:
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   Clock samples:            32
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   Threads:                   7
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   Thread switches:         128
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   Mutexes:                  32
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   Mailboxes:                32
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   Semaphores:               32
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   Scheduler operations:    128
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   Counters:                 32
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   Alarms:                   32
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                                 Confidence
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     Ave     Min     Max     Var  Ave  Min  Function
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  ======  ======  ======  ====== ========== ========
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  110.19  104.67  116.00    3.26   42%  28% Create thread
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   34.00   34.00   34.00    0.00  100% 100% Yield thread [all suspended]
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   24.67   24.67   24.67    0.00  100% 100% Suspend [suspended] thread
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   25.05   24.67   25.33    0.33   57%  42% Resume thread
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   37.14   36.67   37.33    0.27   71%  28% Set priority
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    3.81    3.33    4.00    0.27   71%  28% Get priority
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   80.00   80.00   80.00    0.00  100% 100% Kill [suspended] thread
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   33.90   33.33   34.00    0.16   85%  14% Yield [no other] thread
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   45.90   44.00   46.67    0.54   57%  14% Resume [suspended low prio] thread
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   24.57   24.00   24.67    0.16   85%  14% Resume [runnable low prio] thread
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   42.29   36.67   43.33    1.61   85%  14% Suspend [runnable] thread
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   33.90   33.33   34.00    0.16   85%  14% Yield [only low prio] thread
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   24.67   24.67   24.67    0.00  100% 100% Suspend [runnable-&#62;not runnable]
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   80.00   80.00   80.00    0.00  100% 100% Kill [runnable] thread
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   43.33   43.33   43.33    0.00  100% 100% Destroy [dead] thread
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  106.29  101.33  107.33    1.41   85%  14% Destroy [runnable] thread
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  144.95  141.33  166.00    6.01   85%  85% Resume [high priority] thread
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   78.31   76.67  254.67    2.75   99%  99% Thread switch
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    4.00    4.00    4.00    0.00  100% 100% Scheduler lock
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   16.37   16.00   16.67    0.33   56%  43% Scheduler unlock [0 threads]
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   16.37   16.00   16.67    0.33   56%  43% Scheduler unlock [1 suspended]
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   16.37   16.00   16.67    0.33   56%  43% Scheduler unlock [many suspended]
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   16.37   16.00   16.67    0.33   56%  43% Scheduler unlock [many low prio]
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   10.67   10.67   10.67    0.00  100% 100% Init mutex
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   28.67   28.67   28.67    0.00  100% 100% Lock [unlocked] mutex
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   30.44   30.00   31.33    0.33   59%  37% Unlock [locked] mutex
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   25.42   25.33   26.00    0.15   87%  87% Trylock [unlocked] mutex
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   22.50   22.00   22.67    0.25   75%  25% Trylock [locked] mutex
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    5.75    5.33    6.00    0.31   62%  37% Destroy mutex
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  185.33  185.33  185.33    0.00  100% 100% Unlock/Lock mutex
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   20.17   20.00   20.67    0.25   75%  75% Create mbox
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    2.92    2.67    3.33    0.31   62%  62% Peek [empty] mbox
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   32.42   32.00   32.67    0.31   62%  37% Put [first] mbox
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    3.00    2.67    3.33    0.33  100%  50% Peek [1 msg] mbox
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   32.50   32.00   32.67    0.25   75%  25% Put [second] mbox
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    2.92    2.67    3.33    0.31   62%  62% Peek [2 msgs] mbox
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   32.83   32.67   33.33    0.25   75%  75% Get [first] mbox
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   32.67   32.67   32.67    0.00  100% 100% Get [second] mbox
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   31.33   31.33   31.33    0.00  100% 100% Tryput [first] mbox
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   27.58   27.33   28.00    0.31   62%  62% Peek item [non-empty] mbox
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   32.83   32.67   33.33    0.25   75%  75% Tryget [non-empty] mbox
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   26.50   26.00   26.67    0.25   75%  25% Peek item [empty] mbox
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   28.00   28.00   28.00    0.00  100% 100% Tryget [empty] mbox
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    3.25    2.67    3.33    0.15   87%  12% Waiting to get mbox
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    3.25    2.67    3.33    0.15   87%  12% Waiting to put mbox
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   30.83   30.67   31.33    0.25   75%  75% Delete mbox
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  101.08  100.67  101.33    0.31   62%  37% Put/Get mbox
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   11.17   10.67   11.33    0.25   75%  25% Init semaphore
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   24.17   24.00   24.67    0.25   75%  75% Post [0] semaphore
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   27.08   26.67   27.33    0.31   62%  37% Wait [1] semaphore
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   22.75   22.67   23.33    0.15   87%  87% Trywait [0] semaphore
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   22.21   22.00   22.67    0.29   68%  68% Trywait [1] semaphore
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    7.33    7.33    7.33    0.00  100% 100% Peek semaphore
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    5.92    5.33    6.00    0.15   87%  12% Destroy semaphore
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  110.04  110.00  110.67    0.08   93%  93% Post/Wait semaphore
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    9.54    9.33   10.00    0.29   68%  68% Create counter
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    3.92    3.33    4.00    0.15   87%  12% Get counter value
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    4.00    4.00    4.00    0.00  100% 100% Set counter value
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   30.92   30.67   31.33    0.31   62%  62% Tick counter
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    5.75    5.33    6.00    0.31   62%  37% Delete counter
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   13.83   13.33   14.00    0.25   75%  25% Create alarm
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   46.67   46.67   46.67    0.00  100% 100% Initialize alarm
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    3.67    3.33    4.00    0.33  100%  50% Disable alarm
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   45.67   45.33   46.00    0.33  100%  50% Enable alarm
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    8.33    8.00    8.67    0.33  100%  50% Delete alarm
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   36.33   36.00   36.67    0.33  100%  50% Tick counter [1 alarm]
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  214.67  214.67  214.67    0.00  100% 100% Tick counter [many alarms]
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   62.67   62.67   62.67    0.00  100% 100% Tick &#38; fire counter [1 alarm]
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 1087.04 1075.33 1278.67   21.91   93%  93% Tick &#38; fire counters [&#62;1 together]
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  246.35  240.67  412.00   10.35   96%  96% Tick &#38; fire counters [&#62;1 separately]
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  168.01  167.33  237.33    1.08   99%  99% Alarm latency [0 threads]
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  187.36  168.00  234.67    3.60   86%   1% Alarm latency [2 threads]
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  187.37  167.33  235.33    3.59   85%   1% Alarm latency [many threads]
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  303.12  280.00  508.67    3.21   98%   0% Alarm -&#62; thread resume latency
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   36.65   36.00   38.67    0.00            Clock/interrupt latency
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   65.79   52.00  152.67    0.00            Clock DSR latency
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  316     316     316  (main stack:   752)  Thread stack used (1120 total)
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All done, main stack            : stack used   752 size  2400
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All done             :  Interrupt stack used   280 size  2048
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All done             : Idlethread stack used   268 size  2048
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Timing complete - 30390 ms total
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PASS:&lt;Basic timing OK&#62;
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EXIT:&lt;done&#62;
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        </PRE
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