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zephyr/tests/kernel/test_tickless/microkernel
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Anas Nashif 65c06afa58 kinetis: reorganise soc directory using soc family 
Add Kinetis SoC family and rename fsl_frdm_k64f to mk64f12.
This will allow adding new SoCs of the same family and the reuse of code
among SoCs of the family and series.

Change-Id: Iea1a663aef7ce0487f147bdd36f668bebe80deb5
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
2016-04-18 21:24:58 +00:00
..
src kinetis: reorganise soc directory using soc family 2016-04-18 21:24:58 +00:00
Makefile tests: move kernel tests to tests/ 2016-02-11 18:06:33 +00:00
prj_arm.conf power_mgmt: Make names consistent with new RFC 2016-03-26 14:35:11 -04:00
prj_x86.conf power_mgmt: Make names consistent with new RFC 2016-03-26 14:35:11 -04:00
prj.mdef tests: move kernel tests to tests/ 2016-02-11 18:06:33 +00:00
README.txt tests: move kernel tests to tests/ 2016-02-11 18:06:33 +00:00
testcase.ini stm32: rename CONFIG_SOC_STM32 -> CONFIG_SOC_FAMILY_STM32 2016-04-18 21:24:58 +00:00

README.txt 

Title: Tickless Idle Support

Description:

This test verifies the timing accuracy of the tickless idle feature.

The test first calibrates itself by repeatedly sleeping for 10 ticks with the
tickless idle feature disabled.  It then repeats this process with the tickless
idle feature enabled.  Lastly, it compares the average measured duration of
each approach and displays the result.  The tick timing is correct if the
'diff ticks' with tickless enabled matches the SLEEP_TICKS (10) setting in
the source.

The demonstration utilizes microkernel mutex APIs, timers and tickless
idle mode.

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

Building and Running Project:

This microkernel project outputs to the console.  It can be built and executed
on QEMU as follows:

    make 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:

Tickless Idle Test
Calibrating TSC...
Calibrated time stamp period = 0x00000000163adc3a
Do the real test with tickless enabled
Going idle for 10 ticks...
start ticks     : 343
end   ticks     : 353
diff  ticks     : 10
diff  time stamp: 0x0000000018a69898
Cal   time stamp: 0x00000000163adc3a
variance in time stamp diff: 10 percent
===================================================================
PROJECT EXECUTION SUCCESSFUL