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<HTML
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><HEAD
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>Board: NEC VR4373</TITLE
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>eCos User Guide</TH
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>Prev</A
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WIDTH="80%"
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VALIGN="bottom"
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>Appendix B. Real-time characterization</TD
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WIDTH="10%"
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CLASS="SECT1"
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><A
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NAME="RT-VR4300-VRC4373">Board: NEC VR4373</H1
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><PRE
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CLASS="LITERALLAYOUT"
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> Board: NEC VR4373
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CPU : NEC VR4300 133MHz
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Startup, main stack : stack used 1304 size 3576
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Startup : Interrupt stack used 980 size 4096
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Startup : Idlethread stack used 494 size 2552
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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 6.49 microseconds (431 raw clock ticks)
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Testing parameters:
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Clock samples: 32
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Threads: 16
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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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17.21 16.18 22.14 0.88 75% 68% Create thread
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0.84 0.78 1.29 0.10 81% 81% Yield thread [all suspended]
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0.90 0.62 3.20 0.35 87% 87% Suspend [suspended] thread
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0.74 0.65 1.16 0.12 81% 68% Resume thread
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1.11 0.90 1.70 0.25 75% 68% Set priority
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0.11 0.05 0.35 0.09 75% 75% Get priority
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2.93 2.24 8.27 0.78 93% 75% Kill [suspended] thread
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0.88 0.78 1.92 0.16 93% 81% Yield [no other] thread
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1.82 1.20 4.71 0.62 87% 62% Resume [suspended low prio] thread
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0.70 0.63 0.86 0.09 68% 68% Resume [runnable low prio] thread
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1.21 1.07 1.61 0.13 81% 68% Suspend [runnable] thread
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0.86 0.78 1.58 0.13 81% 81% Yield [only low prio] thread
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0.69 0.62 0.84 0.09 68% 68% Suspend [runnable->not runnable]
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2.64 2.24 4.35 0.43 81% 62% Kill [runnable] thread
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1.50 1.07 5.82 0.56 93% 87% Destroy [dead] thread
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3.66 2.75 7.74 0.82 50% 56% Destroy [runnable] thread
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13.65 8.33 27.88 3.70 50% 43% Resume [high priority] thread
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2.04 1.89 3.32 0.15 46% 49% Thread switch
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0.19 0.05 0.83 0.13 48% 44% Scheduler lock
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0.50 0.41 1.59 0.13 89% 73% Scheduler unlock [0 threads]
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0.52 0.41 1.29 0.14 89% 64% Scheduler unlock [1 suspended]
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0.56 0.41 1.49 0.15 42% 47% Scheduler unlock [many suspended]
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0.56 0.41 1.41 0.15 43% 47% Scheduler unlock [many low prio]
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0.57 0.20 2.33 0.27 65% 50% Init mutex
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0.89 0.75 3.35 0.20 96% 75% Lock [unlocked] mutex
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0.90 0.74 4.38 0.25 96% 93% Unlock [locked] mutex
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0.77 0.65 2.63 0.17 96% 75% Trylock [unlocked] mutex
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0.66 0.59 1.16 0.10 75% 75% Trylock [locked] mutex
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0.07 0.00 0.45 0.09 75% 75% Destroy mutex
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7.95 7.71 9.49 0.19 50% 46% Unlock/Lock mutex
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1.04 0.81 3.44 0.27 93% 68% Create mbox
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0.10 0.02 0.57 0.11 71% 68% Peek [empty] mbox
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1.15 0.83 4.71 0.31 53% 71% Put [first] mbox
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0.10 0.02 0.57 0.12 68% 68% Peek [1 msg] mbox
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1.01 0.83 3.83 0.22 93% 75% Put [second] mbox
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0.09 0.02 0.57 0.10 71% 71% Peek [2 msgs] mbox
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1.03 0.81 5.02 0.27 96% 87% Get [first] mbox
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0.93 0.81 1.61 0.14 84% 62% Get [second] mbox
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1.07 0.77 4.18 0.23 68% 50% Tryput [first] mbox
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0.89 0.72 3.49 0.21 93% 71% Peek item [non-empty] mbox
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1.04 0.83 4.09 0.26 90% 81% Tryget [non-empty] mbox
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0.79 0.68 1.97 0.15 87% 68% Peek item [empty] mbox
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0.84 0.72 2.36 0.17 93% 68% Tryget [empty] mbox
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0.13 0.02 0.59 0.13 87% 62% Waiting to get mbox
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0.13 0.02 0.90 0.13 90% 62% Waiting to put mbox
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0.93 0.77 3.23 0.21 90% 71% Delete mbox
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4.74 4.51 8.80 0.32 93% 78% Put/Get mbox
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0.50 0.21 1.95 0.29 90% 50% Init semaphore
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0.86 0.57 2.87 0.29 93% 56% Post [0] semaphore
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1.01 0.74 3.62 0.28 93% 56% Wait [1] semaphore
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0.87 0.60 3.17 0.28 90% 59% Trywait [0] semaphore
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0.74 0.62 1.70 0.14 93% 56% Trywait [1] semaphore
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0.36 0.11 1.11 0.26 65% 56% Peek semaphore
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0.25 0.12 1.19 0.14 93% 56% Destroy semaphore
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7.85 7.52 8.93 0.21 62% 43% Post/Wait semaphore
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0.90 0.44 3.08 0.29 65% 28% Create counter
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0.07 0.05 0.89 0.05 96% 96% Get counter value
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0.06 0.05 0.33 0.02 96% 96% Set counter value
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0.88 0.86 1.62 0.05 96% 96% Tick counter
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0.13 0.12 0.41 0.02 96% 96% Delete counter
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1.37 0.81 2.95 0.27 62% 25% Create alarm
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1.35 1.17 6.03 0.31 96% 93% Initialize alarm
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0.11 0.08 0.65 0.05 90% 90% Disable alarm
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1.23 1.14 3.05 0.15 93% 87% Enable alarm
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0.21 0.18 0.47 0.04 90% 90% Delete alarm
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1.03 0.99 2.11 0.07 96% 96% Tick counter [1 alarm]
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4.96 4.96 4.96 0.00 100% 100% Tick counter [many alarms]
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1.70 1.67 2.51 0.05 96% 96% Tick & fire counter [1 alarm]
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26.39 26.38 26.71 0.02 96% 96% Tick & fire counters [>1 together]
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5.65 5.64 5.91 0.02 96% 96% Tick & fire counters [>1 separately]
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2.55 2.38 9.86 0.19 96% 54% Alarm latency [0 threads]
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5.37 3.80 9.73 0.95 50% 34% Alarm latency [2 threads]
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8.79 5.83 16.12 1.29 57% 14% Alarm latency [many threads]
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5.85 2.26 16.24 0.00 Clock/interrupt latency
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1540 1536 1544 (main stack: 1664) Thread stack used (2552 total)
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All done, main stack : stack used 1664 size 3576
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All done : Interrupt stack used 312 size 4096
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All done : Idlethread stack used 1440 size 2552
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Timing complete - 23810 ms total
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PASS:<Basic timing OK>
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EXIT:<done>
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</PRE
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>Board: Cogent CMA MPC860 (PowerPC) Evaluation</TD
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