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https://github.com/zephyrproject-rtos/zephyr
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4694dae214
Removes the assignment of kconfig option CONFIG_CPU_CLOCK_FREQ_MHZ from boot_time project configuration files that redundantly set it to the default value (20). Change-Id: I901b2d4dc85d1de53dc4a1809b422ee16301ac03 Signed-off-by: Peter Mitsis <peter.mitsis@windriver.com> |
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| generic_pc | ||
| quark | ||
| Makefile | ||
| README.txt | ||
Title: BootTime
Description:
BootTime measures the time:
a) from system reset to kernel start (crt0.s's __start)
b) from kernel start to begin of main()
c) from kernel start to begin of first task
The project can be built using one of the following three configurations:
best
-------
- Disables most features
- Provides best case boot measurement
default
-------
- Default config options
- Provides typical boot measurement
worst
-------
- Enables most features
- Provides worst case boot measurement
--------------------------------------------------------------------------------
Building and Running Project:
This nanokernel project outputs to the console. It can be built and executed
on QEMU in three possibile configurations as follows:
make pristine
make BOOTTIME_QUALIFIER=best nanokernel.qemu
make pristine
make BOOTTIME_QUALIFIER=default nanokernel.qemu
make pristine
make BOOTTIME_QUALIFIER=worst nanokernel.qemu
--------------------------------------------------------------------------------
Sample Output:
tc_start() - Boot Time Measurement
NanoKernel Boot Result: Clock Frequency: 20 MHz
__start : 377787 cycles, 18889 us
_start->main(): 5287 cycles, 264 us
_start->task : 5653 cycles, 282 us
Boot Time Measurement finished
===================================================================
PASS - bootTimeTask.
===================================================================
VXMICRO PROJECT EXECUTION SUCCESSFUL