real-time-characterization.sgml

eCos操作系统源码

    7.05    6.40    7.20    0.24   81%  18% Init semaphore
   15.55   15.20   16.00    0.39   56%  56% Post [0] semaphore
   17.35   16.80   17.60    0.34   68%  31% Wait [1] semaphore
   14.60   14.40   15.20    0.30   75%  75% Trywait [0] semaphore
   14.20   13.60   14.40    0.30   75%  25% Trywait [1] semaphore
    4.55    4.00    4.80    0.34   68%  31% Peek semaphore
    3.75    3.20    4.00    0.34   68%  31% Destroy semaphore
   70.85   70.40   71.20    0.39   56%  43% Post/Wait semaphore

    6.05    5.60    6.40    0.39   56%  43% Create counter
    2.25    1.60    2.40    0.24   81%  18% Get counter value
    2.25    1.60    2.40    0.24   81%  18% Set counter value
   19.70   19.20   20.00    0.37   62%  37% Tick counter
    3.45    3.20    4.00    0.34   68%  68% Delete counter

    9.05    8.80    9.60    0.34   68%  68% Create alarm
   29.60   29.60   29.60    0.00  100% 100% Initialize alarm
    2.15    1.60    2.40    0.34   68%  31% Disable alarm
   29.35   28.80   29.60    0.34   68%  31% Enable alarm
    5.10    4.80    5.60    0.37   62%  62% Delete alarm
   23.20   23.20   23.20    0.00  100% 100% Tick counter [1 alarm]
  138.00  137.60  138.40    0.40  100%  50% Tick counter [many alarms]
   40.40   40.00   40.80    0.40  100%  50% Tick & fire counter [1 alarm]
  704.25  697.60  804.00   12.47   93%  93% Tick & fire counters [>1 together]
  155.20  155.20  155.20    0.00  100% 100% Tick & fire counters [>1 separately]
  105.20  104.80  151.20    0.76   99%  94% Alarm latency [0 threads]
  117.57  104.80  149.60    7.13   57%  25% Alarm latency [2 threads]
  117.49  104.80  148.80    7.10   58%  26% Alarm latency [many threads]
  192.59  177.60  316.00    1.93   98%   0% Alarm -> thread resume latency

   22.10   21.60   24.00    0.00            Clock/interrupt latency

   38.69   32.80   61.60    0.00            Clock DSR latency

  297     276     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   272 size  2048

Timing complete - 30350 ms total

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

	  </LITERALLAYOUT>
</SECT2>
<SECT2>
<TITLE>CPU :  ARM 920T 20 MHz</TITLE>
<LITERALLAYOUT CLASS="MONOSPACED">

Board: ARM PID Evaluation Board

CPU :  ARM 920T 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 15 'ticks' overhead
... this value will be factored out of all other measurements
Clock interrupt took  291.41 microseconds (364 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
  ======  ======  ======  ====== ========== ========
  257.78  168.00  568.00   48.70   56%  28% Create thread
   50.21   49.60   50.40    0.29   76%  24% Yield thread [all suspended]
   36.26   36.00   36.80    0.35   68%  68% Suspend [suspended] thread
   37.20   36.80   37.60    0.40  100%  50% Resume thread
   56.24   56.00   56.80    0.34   70%  70% Set priority
    5.20    4.80    5.60    0.40  100%  50% Get priority
  122.75  122.40  123.20    0.39   56%  56% Kill [suspended] thread
   50.19   49.60   50.40    0.31   74%  26% Yield [no other] thread
   69.49   66.40   69.60    0.21   92%   2% Resume [suspended low prio] thread
   37.01   36.80   37.60    0.31   74%  74% Resume [runnable low prio] thread
   64.75   55.20   65.60    0.38   80%   2% Suspend [runnable] thread
   50.19   49.60   50.40    0.31   74%  26% Yield [only low prio] thread
   36.24   36.00   36.80    0.34   70%  70% Suspend [runnable-&#62;not runnable]
  122.75  122.40  123.20    0.39   56%  56% Kill [runnable] thread
   67.76   67.20   68.00    0.34   70%  30% Destroy [dead] thread
  167.07  158.40  168.00    0.35   92%   2% Destroy [runnable] thread
  213.49  212.00  249.60    1.46   84%  90% Resume [high priority] thread
  122.81  120.00  389.60    4.17   99%  99% Thread switch

    4.70    4.00    4.80    0.17   87%  12% Scheduler lock
   23.70   23.20   24.00    0.37   62%  37% Scheduler unlock [0 threads]
   23.60   23.20   24.00    0.40  100%  50% Scheduler unlock [1 suspended]
   23.70   23.20   24.00    0.37   62%  37% Scheduler unlock [many suspended]
   23.60   23.20   24.00    0.40  100%  50% Scheduler unlock [many low prio]

   15.65   15.20   16.00    0.39   56%  43% Init mutex
   42.40   42.40   42.40    0.00  100% 100% Lock [unlocked] mutex
   45.37   44.80   46.40    0.36   65%  31% Unlock [locked] mutex
   39.20   39.20   39.20    0.00  100% 100% Trylock [unlocked] mutex
   34.45   34.40   35.20    0.09   93%  93% Trylock [locked] mutex
    8.00    8.00    8.00    0.00  100% 100% Destroy mutex
  284.42  284.00  284.80    0.40   53%  46% Unlock/Lock mutex

   29.40   28.80   29.60    0.30   75%  25% Create mbox
    3.35    3.20    4.00    0.24   81%  81% Peek [empty] mbox
   49.35   48.80   49.60    0.34   68%  31% Put [first] mbox
    3.35    3.20    4.00    0.24   81%  81% Peek [1 msg] mbox
   49.35   48.80   49.60    0.34   68%  31% Put [second] mbox
    3.35    3.20    4.00    0.24   81%  81% Peek [2 msgs] mbox
   49.15   48.80   49.60    0.39   56%  56% Get [first] mbox
   49.15   48.80   49.60    0.39   56%  56% Get [second] mbox
   47.80   47.20   48.00    0.30   75%  25% Tryput [first] mbox
   41.40   40.80   41.60    0.30   75%  25% Peek item [non-empty] mbox
   49.40   48.80   49.60    0.30   75%  25% Tryget [non-empty] mbox
   40.15   40.00   40.80    0.24   81%  81% Peek item [empty] mbox
   40.95   40.80   41.60    0.24   81%  81% Tryget [empty] mbox
    4.05    4.00    4.80    0.09   93%  93% Waiting to get mbox
    4.05    4.00    4.80    0.09   93%  93% Waiting to put mbox
   45.60   45.60   45.60    0.00  100% 100% Delete mbox
  153.27  152.80  153.60    0.39   59%  40% Put/Get mbox

   16.80   16.80   16.80    0.00  100% 100% Init semaphore
   36.60   36.00   36.80    0.30   75%  25% Post [0] semaphore
   39.60   39.20   40.00    0.40  100%  50% Wait [1] semaphore
   34.80   34.40   35.20    0.40  100%  50% Trywait [0] semaphore
   33.35   32.80   33.60    0.34   68%  31% Trywait [1] semaphore
   10.30    9.60   10.40    0.17   87%  12% Peek semaphore
    8.80    8.80    8.80    0.00  100% 100% Destroy semaphore
  166.92  166.40  167.20    0.36   65%  34% Post/Wait semaphore

   13.60   13.60   13.60    0.00  100% 100% Create counter
    4.85    4.80    5.60    0.09   93%  93% Get counter value
    4.80    4.80    4.80    0.00  100% 100% Set counter value
   45.25   44.80   45.60    0.39   56%  43% Tick counter
    7.75    7.20    8.00    0.34   68%  31% Delete counter

   20.80   20.80   20.80    0.00  100% 100% Create alarm
   69.30   68.80   69.60    0.37   62%  37% Initialize alarm
    4.80    4.80    4.80    0.00  100% 100% Disable alarm
   67.35   67.20   68.00    0.24   81%  81% Enable alarm
   11.80   11.20   12.00    0.30   75%  25% Delete alarm
   54.80   54.40   55.20    0.40  100%  50% Tick counter [1 alarm]
  372.35  363.20  652.80   17.53   96%  96% Tick counter [many alarms]
   95.50   95.20   96.00    0.37   62%  62% Tick &#38; fire counter [1 alarm]
 1757.92 1707.20 1996.80   81.43   81%  81% Tick &#38; fire counters [&#62;1 together]
  404.37  404.00  404.80    0.40   53%  53% Tick &#38; fire counters [&#62;1 separately]
  256.57  254.40  395.20    2.17   98%  97% Alarm latency [0 threads]
  296.60  255.20  359.20   23.53   53%  31% Alarm latency [2 threads]
  307.49  265.60  357.60   27.52   53%  53% Alarm latency [many threads]
  467.04  432.00  788.80    5.03   97%   1% Alarm -&#62; thread resume latency

   55.63   54.40   60.80    0.00            Clock/interrupt latency

  101.23   80.80 1433.60    0.00            Clock DSR latency

  316     316     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   272 size  2048

Timing complete - 30780 ms total

PASS:&lt;Basic timing OK&#62;
EXIT:&lt;done&#62;
	  </LITERALLAYOUT>
</SECT2>
</SECT1>

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

<SECT1 id="rt-arm-iq80310">
<TITLE>Board: Intel IQ80310 XScale Development Kit</TITLE>
<LITERALLAYOUT CLASS="MONOSPACED">Board: Intel IQ80310 XScale Development Kit

CPU: Intel XScale 600MHz


Startup, main stack             : stack used   388 size  2400
Startup              :  Interrupt stack used   148 size  4096
Startup              : Idlethread stack used    76 size  1120

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

Reading the hardware clock takes 73 'ticks' overhead
... this value will be factored out of all other measurements
Clock interrupt took   12.11 microseconds (399 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
  ======  ======  ======  ====== ========== ========
    6.53    5.48    8.55    0.50   53%  23% Create thread
    0.37    0.03    3.24    0.18   87%   1% Yield thread [all suspended]
    0.24    0.00    2.06    0.12   87%   1% Suspend [suspended] thread
    0.25    0.00    0.73    0.06   71%   1% Resume thread
    0.36    0.09    0.82    0.10   89%   1% Set priority
    0.03    0.00    0.42    0.05   90%  90% Get priority
    1.07    0.52    6.39    0.18   92%   1% Kill [suspended] thread
    0.33    0.06    0.91    0.08   78%   3% Yield [no other] thread
    0.55    0.03    1.06    0.09   85%   1% Resume [suspended low prio] thread
    0.28    0.00    1.79    0.11   84%   4% Resume [runnable low prio] thread
    0.43    0.00    1.00    0.12   76%   1% Suspend [runnable] thread
    0.31    0.00    1.24    0.09   82%   4% Yield [only low prio] thread
    0.21    0.00    0.42    0.04   73%   1% Suspend [runnable-&#62;not runnable]
    1.00    0.88    1.45    0.04   78%   4% Kill [runnable] thread
    0.59    0.42    3.97    0.13   81%  87% Destroy [dead] thread
    1.43    1.27    1.94    0.07   78%   7% Destroy [runnable] thread
    3.12    2.58    5.09    0.33   56%  34% Resume [high priority] thread
    0.87    0.36    1.39    0.07   86%   0% Thread switch

    0.15    0.00    1.39    0.21   81%  81% Scheduler lock
    0.16    0.00    0.64    0.08   85%   7% Scheduler unlock [0 threads]
    0.16    0.00    0.64    0.08   75%   8% Scheduler unlock [1 suspended]
    0.16    0.00    0.70    0.08   78%   6% Scheduler unlock [many suspended]
    0.16    0.00    0.64    0.07   81%   4% Scheduler unlock [many low prio]

    0.45    0.00    1.39    0.34   56%  46% Init mutex
    0.43    0.18    3.27    0.23   87%  87% Lock [unlocked] mutex
    0.48    0.09    3.88    0.26   84%  71% Unlock [locked] mutex
    0.35    0.21    2.24    0.21   87%  84% Trylock [unlocked] mutex
    0.26    0.00    0.67    0.13   78%   9% Trylock [locked] mutex
    0.21    0.00    1.27    0.24   78%  75% Destroy mutex
    2.58    2.09    3.09    0.13   75%   9% Unlock/Lock mutex

    0.99    0.21    2.48    0.41   65%  28% Create mbox
    0.04    0.00    0.39    0.07   90%  87% Peek [empty] mbox
    0.47    0.27    3.48    0.29   90%  78% Put [first] mbox
    0.02    0.00    0.39    0.03   90%  90% Peek [1 msg] mbox
    0.29    0.15    0.58    0.04   68%   3% Put [second] mbox
    0.02    0.00    0.45    0.04   93%  93% Peek [2 msgs] mbox
    0.48    0.21    3.67    0.26   84%  87% Get [first] mbox
    0.35    0.09    0.82    0.11   75%   3% Get [second] mbox
    0.50    0.21    3.18    0.33   90%  68% Tryput [first] mbox
    0.39    0.15    1.39    0.19   78%  68% Peek item [non-empty] mbox
    0.43    0.18    3.33    0.23   87%  90% Tryget [non-empty] mbox
    0.28    0.03    0.79    0.06   68%   3% Peek item [empty] mbox
    0.28    0.21    0.58    0.05   71%  65% Tryget [empty] mbox
    0.01    0.00    0.36    0.02   96%  90% Waiting to get mbox
    0.05    0.00    0.45    0.09   87%  84% Waiting to put mbox
    0.42    0.09    2.88    0.20   84%  12% Delete mbox
    1.39    1.27    2.39    0.14   87%  87% Put/Get mbox

    0.35    0.00    1.36    0.45   75%  68% Init semaphore
    0.19    0.00    0.45    0.04   81%   3% Post [0] semaphore