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+>Board: Intel SA1100 (Brutus)</TITLE
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+>eCos User Guide</TH
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+>Appendix B. Real-time characterization</TD
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+><A
+NAME="RT-ARM-BRUTUS">Board: Intel SA1100 (Brutus)</H1
+><TABLE
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+><PRE
+CLASS="LITERALLAYOUT"
+>Board: Intel SA1100 (Brutus)
+
+CPU : StrongARM 221.2 MHz
+
+Microseconds for one run through Dhrystone: 3.3
+Dhrystones per Second: 306748.5
+VAX MIPS rating = 174.586
+
+Startup, main stack : stack used 404 size 2400
+Startup : Interrupt stack used 136 size 4096
+Startup : Idlethread stack used 87 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 3.09 microseconds (11 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
+ ====== ====== ====== ====== ========== ========
+ 6.63 5.43 18.99 0.77 70% 37% Create thread
+ 0.83 0.81 2.17 0.04 98% 98% Yield thread [all suspended]
+ 1.27 0.81 5.15 0.30 68% 73% Suspend [suspended] thread
+ 1.25 0.81 5.15 0.25 82% 1% Resume thread
+ 1.52 1.09 7.87 0.30 78% 75% Set priority
+ 0.97 0.54 2.71 0.28 64% 51% Get priority
+ 3.45 2.71 19.53 0.66 84% 76% Kill [suspended] thread
+ 0.90 0.81 6.24 0.17 98% 98% Yield [no other] thread
+ 1.86 1.36 6.24 0.33 68% 50% Resume [suspended low prio] thread
+ 1.25 0.81 5.15 0.25 82% 1% Resume [runnable low prio] thread
+ 2.01 1.63 10.04 0.32 70% 84% Suspend [runnable] thread
+ 0.90 0.81 6.24 0.17 98% 98% Yield [only low prio] thread
+ 1.25 0.81 5.15 0.24 84% 1% Suspend [runnable->not runnable]
+ 2.92 1.90 18.72 0.57 85% 43% Kill [runnable] thread
+ 2.45 1.90 10.31 0.33 95% 54% Destroy [dead] thread
+ 3.95 2.71 23.60 0.89 68% 54% Destroy [runnable] thread
+ 8.55 6.24 19.53 1.15 60% 23% Resume [high priority] thread
+ 1.85 1.63 11.94 0.21 49% 49% Thread switch
+
+ 0.25 0.00 1.63 0.05 89% 10% Scheduler lock
+ 0.52 0.27 1.90 0.07 85% 13% Scheduler unlock [0 threads]
+ 0.51 0.27 1.36 0.06 85% 13% Scheduler unlock [1 suspended]
+ 0.51 0.27 1.36 0.06 85% 13% Scheduler unlock [many suspended]
+ 0.51 0.27 1.63 0.06 85% 13% Scheduler unlock [many low prio]
+
+ 0.58 0.27 3.53 0.20 71% 21% Init mutex
+ 1.07 0.54 5.70 0.35 87% 59% Lock [unlocked] mutex
+ 1.14 0.81 6.51 0.40 96% 81% Unlock [locked] mutex
+ 0.96 0.54 5.15 0.34 68% 65% Trylock [unlocked] mutex
+ 0.94 0.54 4.88 0.34 65% 65% Trylock [locked] mutex
+ 0.33 0.27 2.17 0.11 96% 96% Destroy mutex
+ 4.21 3.80 10.85 0.41 71% 96% Unlock/Lock mutex
+ 0.76 0.54 4.07 0.25 96% 56% Create mbox
+ 0.75 0.54 1.90 0.20 84% 50% Peek [empty] mbox
+ 1.56 1.09 6.78 0.39 68% 59% Put [first] mbox
+ 0.75 0.54 1.90 0.20 84% 50% Peek [1 msg] mbox
+ 1.55 1.09 6.78 0.40 68% 62% Put [second] mbox
+ 0.77 0.54 1.63 0.17 46% 37% Peek [2 msgs] mbox
+ 1.67 1.09 6.24 0.31 87% 34% Get [first] mbox
+ 1.63 1.09 6.24 0.31 75% 34% Get [second] mbox
+ 1.50 1.09 6.51 0.40 56% 62% Tryput [first] mbox
+ 1.58 1.09 5.43 0.37 68% 53% Peek item [non-empty] mbox
+ 1.79 1.09 7.05 0.43 71% 25% Tryget [non-empty] mbox
+ 1.29 1.09 5.15 0.32 87% 87% Peek item [empty] mbox
+ 1.33 1.09 5.97 0.37 96% 84% Tryget [empty] mbox
+ 0.73 0.54 1.90 0.21 84% 56% Waiting to get mbox
+ 0.76 0.54 1.90 0.19 40% 43% Waiting to put mbox
+ 1.47 1.09 6.78 0.39 59% 84% Delete mbox
+ 2.70 2.17 12.75 0.63 96% 96% Put/Get mbox
+
+ 0.47 0.27 2.71 0.20 96% 50% Init semaphore
+ 0.89 0.54 4.88 0.33 56% 75% Post [0] semaphore
+ 0.96 0.54 5.15 0.33 71% 75% Wait [1] semaphore
+ 0.86 0.54 4.88 0.32 96% 81% Trywait [0] semaphore
+ 0.69 0.54 3.26 0.22 96% 75% Trywait [1] semaphore
+ 0.49 0.27 3.26 0.28 84% 84% Peek semaphore
+ 0.39 0.27 2.44 0.19 96% 78% Destroy semaphore
+ 2.83 2.44 11.66 0.55 96% 96% Post/Wait semaphore
+
+ 0.52 0.27 3.26 0.20 56% 40% Create counter
+ 0.59 0.00 2.71 0.34 81% 46% Get counter value
+ 0.36 0.00 2.44 0.21 81% 9% Set counter value
+ 1.13 0.81 2.98 0.26 59% 37% Tick counter
+ 0.39 0.27 1.90 0.19 90% 78% Delete counter
+
+ 0.86 0.54 4.07 0.24 65% 31% Create alarm
+ 1.86 1.36 9.77 0.54 96% 90% Initialize alarm
+ 0.77 0.54 2.71 0.23 84% 50% Disable alarm
+ 1.86 1.36 9.22 0.51 96% 75% Enable alarm
+ 0.89 0.54 3.26 0.25 65% 21% Delete alarm
+ 0.99 0.81 3.26 0.21 96% 59% Tick counter [1 alarm]
+ 4.22 4.07 6.78 0.22 96% 71% Tick counter [many alarms]
+ 1.51 1.36 4.61 0.24 96% 78% Tick & fire counter [1 alarm]
+ 20.29 20.07 23.33 0.23 96% 53% Tick & fire counters [>1 together]
+ 4.71 4.61 7.87 0.20 96% 96% Tick & fire counters [>1 separately]
+ 2.88 2.71 23.87 0.33 99% 99% Alarm latency [0 threads]
+ 3.24 2.71 17.36 0.40 79% 58% Alarm latency [2 threads]
+ 15.71 12.48 27.40 1.47 53% 17% Alarm latency [many threads]
+ 5.95 5.43 64.56 1.02 97% 97% Alarm -> thread resume latency
+
+ 3.25 0.81 14.11 0.00 Clock/interrupt latency
+
+ 2.68 1.09 12.75 0.00 Clock DSR latency
+
+ 29 0 316 (main stack: 764) Thread stack used (1120 total)
+All done, main stack : stack used 764 size 2400
+All done : Interrupt stack used 288 size 4096
+All done : Idlethread stack used 260 size 2048
+
+
+Timing complete - 30280 ms total
+
+ </PRE
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