88 lines
5.0 KiB
Plaintext
88 lines
5.0 KiB
Plaintext
Title: Latency Measurement
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Description:
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This benchmark measures the latency of selected capabilities of both the
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nanokernel and microkernel.
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IMPORTANT: The sample output below was generated using a simulation
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environment, and may not reflect the results that will be generated using other
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environments (simulated or otherwise).
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--------------------------------------------------------------------------------
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Building and Running Project:
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This microkernel project outputs to the console. It can be built and executed
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on QEMU as follows:
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make qemu
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--------------------------------------------------------------------------------
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Troubleshooting:
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Problems caused by out-dated project information can be addressed by
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issuing one of the following commands then rebuilding the project:
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make clean # discard results of previous builds
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# but keep existing configuration info
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or
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make pristine # discard results of previous builds
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# and restore pre-defined configuration info
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--------------------------------------------------------------------------------
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Sample Output:
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|-----------------------------------------------------------------------------|
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| Nanokernel Latency Benchmark |
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|-----------------------------------------------------------------------------|
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| tcs = timer clock cycles: 1 tcs is N nsec |
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|-----------------------------------------------------------------------------|
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| 1- Measure time to switch from fiber to ISR execution |
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| switching time is NNNN tcs = NNNNN nsec |
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|-----------------------------------------------------------------------------|
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| 2- Measure time to switch from ISR back to interrupted fiber |
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| switching time is NNNN tcs = NNNNN nsec |
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|-----------------------------------------------------------------------------|
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| 3- Measure time from ISR to executing a different fiber (rescheduled) |
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| switching time is NNNN tcs = NNNNN nsec |
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|-----------------------------------------------------------------------------|
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| 4- Measure average context switch time between fibers |
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| Average context switch time is NNNN tcs = NNNNN nsec |
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|-----------------------------------------------------------------------------|
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| 5- Measure average time to lock then unlock interrupts |
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| 5.1- When each lock and unlock is executed as a function call |
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| Average time for lock then unlock is NNNN tcs = NNNN nsec |
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| |
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| 5.2- When each lock and unlock is executed as inline function call |
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| Average time for lock then unlock is NNN tcs = NNNN nsec |
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|-----------------------------------------------------------------------------|
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|-----------------------------------------------------------------------------|
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| Microkernel Latency Benchmark |
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|-----------------------------------------------------------------------------|
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| tcs = timer clock cycles: 1 tcs is N nsec |
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|-----------------------------------------------------------------------------|
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| 1- Measure time to switch from ISR to back to interrupted task |
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| switching time is NNNN tcs = NNNNN nsec |
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|-----------------------------------------------------------------------------|
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| 2- Measure time from ISR to executing a different task (rescheduled) |
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| switch time is NNNNN tcs = NNNNNN nsec |
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|-----------------------------------------------------------------------------|
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| 3- Measure average time to signal a sema then test that sema |
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| Average semaphore signal time NNNNN tcs = NNNNNN nsec |
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| Average semaphore test time NNNNN tcs = NNNNNN nsec |
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|-----------------------------------------------------------------------------|
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| 4- Measure average time to lock a mutex then unlock that mutex |
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| Average time to lock the mutex NNNNN tcs = NNNNNN nsec |
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| Average time to unlock the mutex NNNNN tcs = NNNNNN nsec |
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|-----------------------------------------------------------------------------|
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| 5- Measure average context switch time between tasks using (task_yield) |
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| Average task context switch using yield NNNNN tcs = NNNNNN nsec |
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|-----------------------------------------------------------------------------|
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| E N D |
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|-----------------------------------------------------------------------------|
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===================================================================
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PROJECT EXECUTION SUCCESSFUL
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