zephyr

History

Peter Mitsis 9dec8d068c samples: remove SECTION_GARBAGE_COLLECTION By default, the kconfig option SECTION_GARBAGE_COLLECTION is already enabled. Removing this option from the project configuration files does not change the resulting images. Change-Id: I0f3329aa15a341c2c1082f75162b2b3e12447a26 Signed-off-by: Peter Mitsis <peter.mitsis@windriver.com>		2016-02-05 20:13:48 -05:00
..
generic_pc	samples: remove SECTION_GARBAGE_COLLECTION	2016-02-05 20:13:48 -05:00
quark	First commit	2015-04-10 16:44:37 -07:00
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

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