zephyr

History

Peter Mitsis 4694dae214 boot_time: Only set CPU_CLOCK_FREQ_MHZ if necessary 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>		2016-02-05 20:13:48 -05:00
..
generic_pc	boot_time: Only set CPU_CLOCK_FREQ_MHZ if necessary	2016-02-05 20:13:48 -05:00
quark	First commit	2015-04-10 16:44:37 -07:00
src	Fix spaces after #ifdef	2016-02-05 20:13:33 -05:00
Makefile	First commit	2015-04-10 16:44:37 -07:00
README.txt	Remove references to Simics from README.txt files	2016-02-05 20:13:48 -05:00
check_prj_conf.mk	First commit	2015-04-10 16:44:37 -07:00
get_prj_conf.mk	First commit	2015-04-10 16:44:37 -07:00
prj.vpf	First commit	2015-04-10 16:44:37 -07:00

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
   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