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<HTML
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><HEAD
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><TITLE
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>Board: Hitachi Solution Engine 7751 SH4 (se7751)</TITLE
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TITLE="Real-time characterization"
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>eCos User Guide</TH
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VALIGN="bottom"
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>Appendix B. Real-time characterization</TD
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CLASS="SECT1"
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><A
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NAME="RT-SH-SE7751">Board: Hitachi Solution Engine 7751 SH4 (se7751)</H1
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BORDER="5"
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><PRE
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CLASS="LITERALLAYOUT"
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>Board: Hitachi Solution Engine 7751 SH4 (se7751)
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CPU: Hitachi SH4/7751 162MHz
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Startup, main stack : stack used 464 size 4112
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Startup : Interrupt stack used 92 size 4096
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Startup : Idlethread stack used 94 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 1 `ticks' overhead
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... this value will be factored out of all other measurements
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Clock interrupt took 14.27 microseconds (96 raw clock ticks)
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Testing parameters:
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Clock samples: 32
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Threads: 64
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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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8.06 5.63 12.15 1.37 46% 29% Create thread
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1.15 1.04 5.19 0.15 98% 98% Yield thread [all suspended]
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1.13 0.89 5.04 0.27 89% 62% Suspend [suspended] thread
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1.11 0.89 5.19 0.26 89% 71% Resume thread
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1.45 1.19 3.56 0.23 53% 53% Set priority
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0.21 0.15 1.19 0.10 90% 79% Get priority
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4.15 3.56 13.04 0.53 68% 64% Kill [suspended] thread
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1.12 1.04 3.70 0.12 98% 70% Yield [no other] thread
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1.75 1.33 8.00 0.38 59% 65% Resume [suspended low prio] thread
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1.10 0.89 4.59 0.25 87% 73% Resume [runnable low prio] thread
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1.59 1.33 5.93 0.33 81% 79% Suspend [runnable] thread
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1.13 1.04 4.30 0.13 98% 71% Yield [only low prio] thread
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1.09 0.89 3.56 0.21 89% 70% Suspend [runnable->not runnable]
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4.96 4.30 11.70 0.44 68% 39% Kill [runnable] thread
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1.95 1.48 8.00 0.34 75% 57% Destroy [dead] thread
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4.41 3.85 10.37 0.47 53% 57% Destroy [runnable] thread
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13.15 11.41 23.85 1.11 73% 39% Resume [high priority] thread
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3.10 2.96 6.22 0.11 41% 39% Thread switch
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0.13 0.00 1.33 0.06 74% 21% Scheduler lock
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0.76 0.74 1.78 0.03 96% 96% Scheduler unlock [0 threads]
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0.76 0.74 1.78 0.03 96% 96% Scheduler unlock [1 suspended]
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0.77 0.74 2.67 0.05 95% 95% Scheduler unlock [many suspended]
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0.76 0.74 2.37 0.04 95% 95% Scheduler unlock [many low prio]
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0.52 0.15 2.67 0.26 65% 34% Init mutex
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1.23 1.04 5.63 0.32 93% 93% Lock [unlocked] mutex
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1.45 1.19 5.33 0.31 90% 87% Unlock [locked] mutex
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1.13 0.89 4.15 0.28 90% 84% Trylock [unlocked] mutex
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1.00 0.89 2.96 0.17 87% 87% Trylock [locked] mutex
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0.37 0.30 1.78 0.13 90% 84% Destroy mutex
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9.09 8.59 12.59 0.43 71% 71% Unlock/Lock mutex
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0.93 0.59 4.30 0.40 84% 71% Create mbox
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0.26 0.00 1.19 0.17 71% 59% Peek [empty] mbox
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3.03 2.52 6.37 0.47 50% 59% Put [first] mbox
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0.23 0.00 0.74 0.14 68% 15% Peek [1 msg] mbox
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2.93 2.52 4.74 0.46 71% 59% Put [second] mbox
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0.22 0.00 0.59 0.13 68% 15% Peek [2 msgs] mbox
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2.07 1.63 5.93 0.37 84% 59% Get [first] mbox
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2.06 1.63 4.74 0.34 78% 59% Get [second] mbox
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1.48 1.04 5.48 0.37 62% 53% Tryput [first] mbox
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1.31 1.04 4.89 0.32 96% 75% Peek item [non-empty] mbox
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1.47 1.04 5.78 0.38 84% 65% Tryget [non-empty] mbox
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1.15 0.89 3.11 0.18 71% 56% Peek item [empty] mbox
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1.20 1.04 3.85 0.21 93% 84% Tryget [empty] mbox
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0.21 0.00 0.74 0.14 68% 18% Waiting to get mbox
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0.19 0.00 0.44 0.10 43% 15% Waiting to put mbox
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2.19 1.93 5.78 0.27 93% 71% Delete mbox
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10.23 9.93 11.56 0.15 53% 37% Put/Get mbox
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0.37 0.15 1.33 0.26 71% 71% Init semaphore
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0.98 0.89 2.52 0.13 96% 68% Post [0] semaphore
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1.08 0.89 3.26 0.15 68% 93% Wait [1] semaphore
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0.98 0.89 3.41 0.16 93% 93% Trywait [0] semaphore
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0.73 0.59 1.63 0.07 71% 25% Trywait [1] semaphore
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0.33 0.30 1.33 0.07 93% 93% Peek semaphore
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0.34 0.30 1.78 0.09 96% 96% Destroy semaphore
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9.36 8.74 10.37 0.33 56% 31% Post/Wait semaphore
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0.54 0.15 3.26 0.23 59% 37% Create counter
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0.13 0.00 0.59 0.07 68% 25% Get counter value
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0.14 0.00 0.59 0.07 68% 25% Set counter value
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3.74 3.56 5.33 0.17 53% 75% Tick counter
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0.32 0.15 2.07 0.12 71% 21% Delete counter
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1.59 1.19 3.11 0.29 71% 43% Create alarm
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1.89 1.48 6.37 0.44 87% 78% Initialize alarm
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0.20 0.15 0.74 0.09 87% 84% Disable alarm
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1.62 1.33 5.63 0.41 87% 84% Enable alarm
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0.40 0.30 1.33 0.13 87% 62% Delete alarm
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4.03 3.70 5.78 0.27 68% 56% Tick counter [1 alarm]
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14.18 13.93 15.70 0.27 81% 75% Tick counter [many alarms]
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4.81 4.59 5.93 0.13 81% 15% Tick & fire counter [1 alarm]
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30.77 30.52 33.63 0.20 75% 65% Tick & fire counters [>1 together]
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15.10 14.52 17.04 0.23 71% 3% Tick & fire counters [>1 separately]
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8.78 8.59 18.22 0.20 97% 89% Alarm latency [0 threads]
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11.29 9.33 17.48 1.02 56% 22% Alarm latency [2 threads]
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18.70 15.70 26.37 1.45 54% 22% Alarm latency [many threads]
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19.40 18.81 57.48 0.65 97% 97% Alarm -> thread resume latency
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4.18 2.81 8.89 0.00 Clock/interrupt latency
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3.98 2.52 11.56 0.00 Clock DSR latency
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6 0 380 (main stack: 728) Thread stack used (992 total)
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All done, main stack : stack used 728 size 4112
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All done : Interrupt stack used 196 size 4096
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All done : Idlethread stack used 360 size 2048
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Timing complete - 29790 ms total
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PASS:<Basic timing OK>
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EXIT:<done> </PRE
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