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>eCos User Guide</TH
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>Appendix B. Real-time characterization</TD
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NAME="RT-AT91-EB40">Board: Atmel AT91/EB40</H1
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>Board: Atmel AT91/EB40
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CPU : AT91R40807 (ARM7TDMI core), 32MHz
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512KB RAM, 64K Flash
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Startup, main stack             : stack used   420 size  2400
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Startup              :  Interrupt stack used   144 size  4096
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Startup              : Idlethread stack used    84 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 3 'ticks' overhead
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... this value will be factored out of all other measurements
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Clock interrupt took  127.53 microseconds (130 raw clock ticks)
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Testing parameters:
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   Clock samples:            32
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   Threads:                  25
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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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   86.48   71.29  101.56    7.99   48%  28% Create thread
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   20.70   20.51   21.48    0.31   80%  80% Yield thread [all suspended]
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   17.15   16.60   17.58    0.48   56%  44% Suspend [suspended] thread
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   17.07   16.60   17.58    0.49   52%  52% Resume thread
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   25.51   25.39   26.37    0.21   88%  88% Set priority
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    3.16    2.93    3.91    0.36   76%  76% Get priority
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   52.34   51.76   52.73    0.47   60%  40% Kill [suspended] thread
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   20.70   20.51   21.48    0.31   80%  80% Yield [no other] thread
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   28.98   28.32   30.27    0.48   60%  36% Resume [suspended low prio] thread
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   17.11   16.60   17.58    0.49   52%  48% Resume [runnable low prio] thread
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   27.85   26.37   28.32    0.52   96%   4% Suspend [runnable] thread
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   20.70   20.51   21.48    0.31   80%  80% Yield [only low prio] thread
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   17.23   16.60   17.58    0.45   64%  36% Suspend [runnable-&#62;not runnable]
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   52.34   51.76   52.73    0.47   60%  40% Kill [runnable] thread
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   33.01   32.23   33.20    0.31   80%  20% Destroy [dead] thread
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   72.03   70.31   72.27    0.38   80%   4% Destroy [runnable] thread
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   96.99   95.70  112.30    1.22   64%  96% Resume [high priority] thread
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   51.48   49.80  164.06    1.76   99%  99% Thread switch
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    2.78    1.95    2.93    0.26   84%  15% Scheduler lock
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   11.81   11.72   12.70    0.17   90%  90% Scheduler unlock [0 threads]
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   11.81   11.72   12.70    0.17   90%  90% Scheduler unlock [1 suspended]
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   11.81   11.72   12.70    0.17   90%  90% Scheduler unlock [many suspended]
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   11.81   11.72   12.70    0.17   90%  90% Scheduler unlock [many low prio]
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    5.49    4.88    5.86    0.46   62%  37% Init mutex
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   20.20   19.53   20.51    0.42   68%  31% Lock [unlocked] mutex
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   24.44   24.41   25.39    0.06   96%  96% Unlock [locked] mutex
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   18.25   17.58   18.55    0.42   68%  31% Trylock [unlocked] mutex
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   16.11   15.63   16.60    0.49  100%  50% Trylock [locked] mutex
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    6.10    5.86    6.84    0.37   75%  75% Destroy mutex
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  124.21  124.02  125.00    0.30   81%  81% Unlock/Lock mutex
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    9.28    8.79    9.77    0.49  100%  50% Create mbox
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    2.93    2.93    2.93    0.00  100% 100% Peek [empty] mbox
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   22.58   22.46   23.44    0.21   87%  87% Put [first] mbox
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    2.44    1.95    2.93    0.49  100%  50% Peek [1 msg] mbox
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   22.58   22.46   23.44    0.21   87%  87% Put [second] mbox
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    2.44    1.95    2.93    0.49  100%  50% Peek [2 msgs] mbox
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   22.71   22.46   23.44    0.37   75%  75% Get [first] mbox
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   22.71   22.46   23.44    0.37   75%  75% Get [second] mbox
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   21.18   20.51   21.48    0.42   68%  31% Tryput [first] mbox
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   18.98   18.55   19.53    0.48   56%  56% Peek item [non-empty] mbox
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   22.46   22.46   22.46    0.00  100% 100% Tryget [non-empty] mbox
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   18.31   17.58   18.55    0.37   75%  25% Peek item [empty] mbox
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   19.53   19.53   19.53    0.00  100% 100% Tryget [empty] mbox
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    2.69    1.95    2.93    0.37   75%  25% Waiting to get mbox
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    2.93    2.93    2.93    0.00  100% 100% Waiting to put mbox
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   23.86   23.44   24.41    0.48   56%  56% Delete mbox
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   67.60   67.38   68.36    0.33   78%  78% Put/Get mbox
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    5.37    4.88    5.86    0.49  100%  50% Init semaphore
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   16.97   16.60   17.58    0.46   62%  62% Post [0] semaphore
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   18.98   18.55   19.53    0.48   56%  56% Wait [1] semaphore
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   15.81   15.63   16.60    0.30   81%  81% Trywait [0] semaphore
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   15.29   14.65   15.63    0.44   65%  34% Trywait [1] semaphore
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    5.62    4.88    5.86    0.37   75%  25% Peek semaphore
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    6.35    5.86    6.84    0.49  100%  50% Destroy semaphore
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   72.36   72.27   73.24    0.17   90%  90% Post/Wait semaphore
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    7.08    6.84    7.81    0.37   75%  75% Create counter
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    3.17    2.93    3.91    0.37   75%  75% Get counter value
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    3.05    2.93    3.91    0.21   87%  87% Set counter value
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   24.11   23.44   24.41    0.42   68%  31% Tick counter
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    5.49    4.88    5.86    0.46   62%  37% Delete counter
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   10.92   10.74   11.72    0.30   81%  81% Create alarm
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   31.46   31.25   32.23    0.33   78%  78% Initialize alarm
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    3.05    2.93    3.91    0.21   87%  87% Disable alarm
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   31.49   31.25   32.23    0.37   75%  75% Enable alarm
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    7.02    6.84    7.81    0.30   81%  81% Delete alarm
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   31.16   30.27   31.25    0.17   90%   9% Tick counter [1 alarm]
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  309.26  304.69  425.78    7.28   96%  96% Tick counter [many alarms]
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   44.83   43.95   44.92    0.17   90%   9% Tick &#38; fire counter [1 alarm]
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  781.68  774.41  893.55   13.62   93%  93% Tick &#38; fire counters [&#62;1 together]
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  324.16  320.31  433.59    6.84   96%  96% Tick &#38; fire counters [&#62;1 separately]
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  114.26  113.28  167.97    0.84   57%  42% Alarm latency [0 threads]
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  126.91  113.28  159.18    8.20   50%  31% Alarm latency [2 threads]
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  127.11  113.28  158.20    8.09   51%  28% Alarm latency [many threads]
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  196.49  189.45  331.05    2.10   98%   0% Alarm -&#62; thread resume latency
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   23.50   23.44   25.39    0.00            Clock/interrupt latency
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   40.31   33.20  514.65    0.00            Clock DSR latency
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  300     271     312  (main stack:   832)  Thread stack used (1120 total)
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All done, main stack            : stack used   832 size  2400
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All done             :  Interrupt stack used   288 size  4096
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All done             : Idlethread stack used   272 size  2048
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Timing complete - 30350 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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