real-time-characterization.sgml

eCos操作系统源码

    2.69    1.95    5.86    0.96   65%  65% Init semaphore
    3.78    1.95    7.81    0.46   84%  12% Post [0] semaphore
    4.27    3.91    7.81    0.62   84%  84% Wait [1] semaphore
    3.72    1.95    7.81    0.66   75%  18% Trywait [0] semaphore
    3.29    1.95    5.86    0.92   62%  34% Trywait [1] semaphore
    2.32    1.95    3.91    0.59   81%  81% Peek semaphore
    1.89    0.00    3.91    0.24   90%   6% Destroy semaphore
   15.75   13.67   29.30    1.07   68%  21% Post/Wait semaphore

    2.69    1.95    5.86    0.96   65%  65% Create counter
    1.83    0.00    1.95    0.23   93%   6% Get counter value
    1.53    0.00    3.91    0.76   71%  25% Set counter value
    4.82    3.91    5.86    0.97   53%  53% Tick counter
    1.89    0.00    1.95    0.12   96%   3% Delete counter

    3.78    1.95    7.81    0.46   84%  12% Create alarm
    7.99    5.86   15.63    0.70   81%   9% Initialize alarm
    1.71    0.00    1.95    0.43   87%  12% Disable alarm
    7.14    5.86   11.72    1.04   56%  40% Enable alarm
    2.50    1.95    3.91    0.79   71%  71% Delete alarm
    4.94    3.91    7.81    1.04   96%  50% Tick counter [1 alarm]
   19.47   17.58   23.44    0.36   87%   9% Tick counter [many alarms]
    7.63    5.86   11.72    0.55   81%  15% Tick & fire counter [1 alarm]
   99.06   97.66  105.47    1.05   59%  37% Tick & fire counters [>1 together]
   22.15   21.48   27.34    0.96   71%  71% Tick & fire counters [>1 separately]
  359.16  357.42  378.91    0.87   71%  25% Alarm latency [0 threads]
  364.03  357.42  402.34    3.03   58%  15% Alarm latency [2 threads]
  408.25  402.34  416.02    2.89   53%  24% Alarm latency [many threads]
  381.16  376.95  492.19    2.48   95%  46% Alarm -> thread resume latency

    9.79    5.86   19.53    0.00            Clock/interrupt latency

   12.13    5.86   31.25    0.00            Clock DSR latency

   12       0     316  (main stack:   752)  Thread stack used (1120 total)
All done, main stack            : stack used   752 size  2400
All done             :  Interrupt stack used   288 size  4096
All done             : Idlethread stack used   276 size  2048

Timing complete - 30450 ms total

PASS:<Basic timing OK>
EXIT:<done>

	  </LITERALLAYOUT>
</SECT2>
<SECT2>
<TITLE>CPU  : Cirrus Logic EP7212 73MHz</TITLE>
<LITERALLAYOUT CLASS="MONOSPACED">Board: Cirrus Logic EDB7111-2 Development Board

CPU  : Cirrus Logic EP7212 73MHz



Startup, main stack             : stack used   404 size  2400
Startup              :  Interrupt stack used   136 size  4096
Startup              : Idlethread stack used    88 size  2048

eCos Kernel Timings
Notes: all times are in microseconds (.000001) unless otherwise stated

Reading the hardware clock takes 0 'ticks' overhead
... this value will be factored out of all other measurements
Clock interrupt took  356.32 microseconds (182 raw clock ticks)

Testing parameters:
   Clock samples:            32
   Threads:                  64
   Thread switches:         128
   Mutexes:                  32
   Mailboxes:                32
   Semaphores:               32
   Scheduler operations:    128
   Counters:                 32
   Alarms:                   32


                                 Confidence
     Ave     Min     Max     Var  Ave  Min  Function
  ======  ======  ======  ====== ========== ========
   22.43   15.63   33.20    3.02   68%  18% Create thread
    4.48    3.91    5.86    0.81   70%  70% Yield thread [all suspended]
    4.42    3.91    7.81    0.78   75%  75% Suspend [suspended] thread
    4.12    1.95    5.86    0.49   82%   3% Resume thread
    5.62    3.91   11.72    0.64   78%  18% Set priority
    2.17    1.95    3.91    0.38   89%  89% Get priority
   11.54    9.77   27.34    0.88   70%  25% Kill [suspended] thread
    4.64    3.91    9.77    0.96   65%  65% Yield [no other] thread
    7.51    5.86   15.63    0.72   76%  21% Resume [suspended low prio] thread
    3.88    1.95    9.77    0.42   82%  10% Resume [runnable low prio] thread
    7.14    5.86   13.67    1.00   59%  39% Suspend [runnable] thread
    4.52    3.91    7.81    0.86   70%  70% Yield [only low prio] thread
    4.15    1.95    7.81    0.49   85%   1% Suspend [runnable-&#62;not runnable]
   11.26    9.77   27.34    1.17   56%  39% Kill [runnable] thread
    6.22    3.91   13.67    0.88   70%   7% Destroy [dead] thread
   13.64   11.72   33.20    1.02   64%  26% Destroy [runnable] thread
   24.17   21.48   41.02    1.49   82%  12% Resume [high priority] thread
    8.80    7.81   21.48    1.08   98%  54% Thread switch

    1.60    0.00    1.95    0.58   82%  17% Scheduler lock
    2.61    1.95    3.91    0.87   66%  66% Scheduler unlock [0 threads]
    2.59    1.95    3.91    0.86   67%  67% Scheduler unlock [1 suspended]
    2.61    1.95    3.91    0.87   66%  66% Scheduler unlock [many suspended]
    2.59    1.95    3.91    0.86   67%  67% Scheduler unlock [many low prio]

    2.62    1.95    3.91    0.88   65%  65% Init mutex
    4.82    3.91    9.77    1.09   96%  59% Lock [unlocked] mutex
    4.39    3.91    9.77    0.79   81%  81% Unlock [locked] mutex
    3.84    1.95    7.81    0.36   87%   9% Trylock [unlocked] mutex
    3.54    1.95    5.86    0.69   75%  21% Trylock [locked] mutex
    1.83    0.00    3.91    0.34   87%   9% Destroy mutex
   34.61   31.25   46.88    1.68   78%   9% Unlock/Lock mutex

    3.97    1.95    7.81    0.24   93%   3% Create mbox
    1.83    0.00    3.91    0.34   87%   9% Peek [empty] mbox
    4.76    3.91    9.77    1.07   62%  62% Put [first] mbox
    1.71    0.00    3.91    0.64   75%  18% Peek [1 msg] mbox
    5.00    3.91    9.77    1.10   96%  50% Put [second] mbox
    1.65    0.00    1.95    0.52   84%  15% Peek [2 msgs] mbox
    5.31    3.91   11.72    1.05   59%  37% Get [first] mbox
    5.13    3.91    7.81    0.99   56%  40% Get [second] mbox
    4.76    3.91   11.72    1.12   96%  65% Tryput [first] mbox
    4.46    3.91    7.81    0.82   75%  75% Peek item [non-empty] mbox
    5.55    3.91    9.77    0.82   68%  25% Tryget [non-empty] mbox
    4.03    1.95    7.81    0.58   78%   9% Peek item [empty] mbox
    4.27    3.91    5.86    0.59   81%  81% Tryget [empty] mbox
    1.77    0.00    3.91    0.44   84%  12% Waiting to get mbox
    1.59    0.00    1.95    0.60   81%  18% Waiting to put mbox
    5.37    3.91    9.77    0.91   65%  31% Delete mbox
   16.66   13.67   27.34    1.42   90%   3% Put/Get mbox

    2.62    1.95    5.86    0.92   68%  68% Init semaphore
    3.84    1.95    7.81    0.47   81%  12% Post [0] semaphore
    4.21    3.91    7.81    0.53   87%  87% Wait [1] semaphore
    3.48    1.95    5.86    0.76   71%  25% Trywait [0] semaphore
    3.60    1.95    5.86    0.62   78%  18% Trywait [1] semaphore
    2.26    1.95    5.86    0.53   87%  87% Peek semaphore
    1.89    0.00    1.95    0.12   96%   3% Destroy semaphore
   16.05   13.67   29.30    1.40   59%  18% Post/Wait semaphore

    2.38    1.95    3.91    0.67   78%  78% Create counter
    2.01    0.00    3.91    0.35   84%   6% Get counter value
    1.89    0.00    3.91    0.24   90%   6% Set counter value
    4.58    3.91    5.86    0.88   65%  65% Tick counter
    1.71    0.00    1.95    0.43   87%  12% Delete counter

    3.84    1.95    7.81    0.36   87%   9% Create alarm
    7.99    5.86   15.63    0.47   93%   3% Initialize alarm
    2.01    0.00    3.91    0.35   84%   6% Disable alarm
    6.53    5.86   13.67    1.01   75%  75% Enable alarm
    2.32    1.95    3.91    0.59   81%  81% Delete alarm
    4.76    3.91    7.81    1.01   59%  59% Tick counter [1 alarm]
   19.53   17.58   23.44    0.24   90%   6% Tick counter [many alarms]
    7.57    5.86   13.67    0.75   75%  21% Tick &#38; fire counter [1 alarm]
   98.57   97.66  105.47    1.14   96%  62% Tick &#38; fire counters [&#62;1 together]
   22.15   21.48   27.34    0.96   71%  71% Tick &#38; fire counters [&#62;1 separately]
  359.18  357.42  384.77    1.10   65%  31% Alarm latency [0 threads]
  362.63  357.42  396.48    2.55   43%  27% Alarm latency [2 threads]
  408.22  402.34  416.02    2.73   55%  21% Alarm latency [many threads]
  378.63  375.00  494.14    2.56   93%  71% Alarm -&#62; thread resume latency

    9.78    5.86   19.53    0.00            Clock/interrupt latency

   12.21    5.86   31.25    0.00            Clock DSR latency

   12       0     316  (main stack:   752)  Thread stack used (1120 total)
All done, main stack            : stack used   752 size  2400
All done             :  Interrupt stack used   288 size  4096
All done             : Idlethread stack used   276 size  2048

Timing complete - 30550 ms total

PASS:&lt;Basic timing OK&#62;
EXIT:&lt;done&#62;

	  </LITERALLAYOUT>
</SECT2>
</SECT1>

<!-- ==================================================== -->

<SECT1 id="rt-arm-pid">
<TITLE>Board: ARM PID Evaluation Board</TITLE>
<SECT2>
<TITLE>CPU :  ARM 7TDMI 20 MHz</TITLE>
<LITERALLAYOUT CLASS="MONOSPACED">Board: ARM PID Evaluation Board

CPU :  ARM 7TDMI 20 MHz



Startup, main stack             : stack used   404 size  2400
Startup              :  Interrupt stack used   136 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 6 'ticks' overhead
... this value will be factored out of all other measurements
Clock interrupt took  120.74 microseconds (150 raw clock ticks)

Testing parameters:
   Clock samples:            32
   Threads:                  50
   Thread switches:         128
   Mutexes:                  32
   Mailboxes:                32
   Semaphores:               32
   Scheduler operations:    128
   Counters:                 32
   Alarms:                   32


                                 Confidence
     Ave     Min     Max     Var  Ave  Min  Function
  ======  ======  ======  ====== ========== ========
   99.01   68.00  129.60   15.62   50%  26% Create thread
   21.60   21.60   21.60    0.00  100% 100% Yield thread [all suspended]
   15.65   15.20   16.00    0.39   56%  44% Suspend [suspended] thread
   15.79   15.20   16.00    0.31   74%  26% Resume thread
   23.65   23.20   24.00    0.39   56%  44% Set priority
    2.26    1.60    2.40    0.24   82%  18% Get priority
   51.39   51.20   52.00    0.29   76%  76% Kill [suspended] thread
   21.60   21.60   21.60    0.00  100% 100% Yield [no other] thread
   29.47   28.00   29.60    0.22   86%   2% Resume [suspended low prio] thread
   15.60   15.20   16.00    0.40  100%  50% Resume [runnable low prio] thread
   27.73   24.00   28.00    0.40   74%   2% Suspend [runnable] thread
   21.60   21.60   21.60    0.00  100% 100% Yield [only low prio] thread
   15.65   15.20   16.00    0.39   56%  44% Suspend [runnable-&#62;not runnable]
   51.39   51.20   52.00    0.29   76%  76% Kill [runnable] thread
   27.66   27.20   28.80    0.41   54%  44% Destroy [dead] thread
   68.93   64.80   69.60    0.35   72%   2% Destroy [runnable] thread
   91.26   90.40  107.20    0.64   66%  32% Resume [high priority] thread
   49.14   48.80   49.60    0.39   57%  57% Thread switch

    2.20    1.60    2.40    0.30   75%  25% Scheduler lock
   10.20    9.60   10.40    0.30   75%  25% Scheduler unlock [0 threads]
   10.20    9.60   10.40    0.30   75%  25% Scheduler unlock [1 suspended]
   10.20    9.60   10.40    0.30   75%  25% Scheduler unlock [many suspended]
   10.20    9.60   10.40    0.30   75%  25% Scheduler unlock [many low prio]

    6.85    6.40    7.20    0.39   56%  43% Init mutex
   18.40   18.40   18.40    0.00  100% 100% Lock [unlocked] mutex
   19.57   19.20   20.00    0.40   53%  53% Unlock [locked] mutex
   16.55   16.00   16.80    0.34   68%  31% Trylock [unlocked] mutex
   14.55   14.40   15.20    0.24   81%  81% Trylock [locked] mutex
    3.55    3.20    4.00    0.39   56%  56% Destroy mutex
  119.85  119.20  120.00    0.24   81%  18% Unlock/Lock mutex

   12.85   12.80   13.60    0.09   93%  93% Create mbox
    1.65    1.60    2.40    0.09   93%  93% Peek [empty] mbox
   20.70   20.00   20.80    0.17   87%  12% Put [first] mbox
    1.65    1.60    2.40    0.09   93%  93% Peek [1 msg] mbox
   20.70   20.00   20.80    0.17   87%  12% Put [second] mbox
    1.65    1.60    2.40    0.09   93%  93% Peek [2 msgs] mbox
   20.85   20.80   21.60    0.09   93%  93% Get [first] mbox
   20.85   20.80   21.60    0.09   93%  93% Get [second] mbox
   19.90   19.20   20.00    0.17   87%  12% Tryput [first] mbox
   17.60   17.60   17.60    0.00  100% 100% Peek item [non-empty] mbox
   20.90   20.80   21.60    0.17   87%  87% Tryget [non-empty] mbox
   16.80   16.80   16.80    0.00  100% 100% Peek item [empty] mbox
   17.65   17.60   18.40    0.09   93%  93% Tryget [empty] mbox
    1.85    1.60    2.40    0.34   68%  68% Waiting to get mbox
    1.85    1.60    2.40    0.34   68%  68% Waiting to put mbox
   19.40   19.20   20.00    0.30   75%  75% Delete mbox
   65.05   64.80   65.60    0.34   68%  68% Put/Get mbox