zephyr

History

David B. Kinder ac74d8b652 license: Replace Apache boilerplate with SPDX tag Replace the existing Apache 2.0 boilerplate header with an SPDX tag throughout the zephyr code tree. This patch was generated via a script run over the master branch. Also updated doc/porting/application.rst that had a dependency on line numbers in a literal include. Manually updated subsys/logging/sys_log.c that had a malformed header in the original file. Also cleanup several cases that already had a SPDX tag and we either got a duplicate or missed updating. Jira: ZEP-1457 Change-Id: I6131a1d4ee0e58f5b938300c2d2fc77d2e69572c Signed-off-by: David B. Kinder <david.b.kinder@intel.com> Signed-off-by: Kumar Gala <kumar.gala@linaro.org>		2017-01-19 03:50:58 +00:00
..
ia32	kernel: add LEGACY_KERNEL option	2017-01-09 19:42:13 +00:00
quark_d2000	kernel: add LEGACY_KERNEL option	2017-01-09 19:42:13 +00:00
quark_se	kernel: add LEGACY_KERNEL option	2017-01-09 19:42:13 +00:00
quark_x1000	kernel: add LEGACY_KERNEL option	2017-01-09 19:42:13 +00:00
src	license: Replace Apache boilerplate with SPDX tag	2017-01-19 03:50:58 +00:00
Makefile	tests: introduce Makefile.test	2017-01-03 17:48:44 +00:00
prj.mdef	tests: move benchmark tests to legacy/	2016-11-01 19:23:48 +00:00
README.txt	tests: move benchmark tests to legacy/	2016-11-01 19:23:48 +00:00
testcase.ini	samples: tests: tag all legacy test cases and samples	2016-11-30 21:45:22 +00:00

README.txt

Title: Boot Time Measurement

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 BOOTTIME_QUALIFIER=best qemu

    make BOOTTIME_QUALIFIER=default qemu

    make BOOTTIME_QUALIFIER=worst qemu

--------------------------------------------------------------------------------

Troubleshooting:

Problems caused by out-dated project information can be addressed by
issuing one of the following commands then rebuilding the project:

    make clean          # discard results of previous builds
                        # but keep existing configuration info
or
    make pristine       # discard results of previous builds
                        # and restore pre-defined configuration info

--------------------------------------------------------------------------------

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.
===================================================================
PROJECT EXECUTION SUCCESSFUL