59 lines
1.6 KiB
Plaintext
59 lines
1.6 KiB
Plaintext
|
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
|
||
|
|
d) from kernel start to when microkernel's main task goes immediately idle
|
||
|
|
|
||
|
|
The project can be built using one of the following three configurations:
|
||
|
|
|
||
|
|
best
|
||
|
|
-------
|
||
|
|
- Disables most features
|
||
|
|
- Provides best case boot measurement
|
||
|
|
|
||
|
|
default
|
||
|
|
-------
|
||
|
|
- Default configuration options
|
||
|
|
- Provides typical boot measurement
|
||
|
|
|
||
|
|
worst
|
||
|
|
-------
|
||
|
|
- Enables most features.
|
||
|
|
- Provides worst case boot measurement
|
||
|
|
|
||
|
|
--------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
Building and Running Project:
|
||
|
|
|
||
|
|
This microkernel 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 microkernel.qemu
|
||
|
|
|
||
|
|
make pristine
|
||
|
|
make BOOTTIME_QUALIFIER=default microkernel.qemu
|
||
|
|
|
||
|
|
make pristine
|
||
|
|
make BOOTTIME_QUALIFIER=worst microkernel.qemu
|
||
|
|
|
||
|
|
--------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
Sample Output:
|
||
|
|
|
||
|
|
tc_start() - Boot Time Measurement
|
||
|
|
MicroKernel Boot Result: Clock Frequency: 20 MHz
|
||
|
|
__start : 377787 cycles, 18889 us
|
||
|
|
_start->main(): 3915 cycles, 195 us
|
||
|
|
_start->task : 5898 cycles, 294 us
|
||
|
|
_start->idle : 6399 cycles, 319 us
|
||
|
|
Boot Time Measurement finished
|
||
|
|
===================================================================
|
||
|
|
PASS - bootTimeTask.
|
||
|
|
===================================================================
|
||
|
|
VXMICRO PROJECT EXECUTION SUCCESSFUL
|