zephyr

History

Peter Mitsis d63a4f7bf7 nano_timers: Simplify nano_xxx_timer_test() API family Simplifies the nanokernel timer API so that the timeout parameter must be specified when invoking nano_isr_timer_test(), nano_fiber_timer_test(), nano_task_timer_test() and nano_timer_test(). This obsoletes the following APIs: nano_fiber_timer_wait() nano_task_timer_wait() nano_timer_wait() Note that even the though the new API requires that the timeout parameter be specified, there are currentl only two acceptable values: TICKS_NONE and TICKS_UNLIMITED Theoretically, the current implementation would allow one to supply a finite positive value for the timeout and the system would wait up to that many ticks for the timer to expire. However, it is thought that that unnecessarily complicates the nanokernel timer model and so it is left as an unsupported option. Should that change, then that feature could be enabled by updating the documentation. Change-Id: I8835c5342ab5025d6f70fdfbed54a50add7568d7 Signed-off-by: Peter Mitsis <peter.mitsis@windriver.com>		2016-02-05 20:25:15 -05:00
..
src	nano_timers: Simplify nano_xxx_timer_test() API family	2016-02-05 20:25:15 -05:00
Makefile	Use BOARD instead of PLATFORM_CONFIG	2016-02-05 20:25:11 -05:00
README.txt	Update Title in sample project README.txt files	2016-02-05 20:15:21 -05:00
prj.mdef	Rename VPF files to use MDEF file extension	2016-02-05 20:14:15 -05:00
prj_x86.conf	x86: collapse AUTOMATIC_FP_ENABLING into FP_SHARING	2016-02-05 20:24:20 -05:00

README.txt

Title: Shared Floating Point Support

Description:

This test uses two tasks to independently compute pi, while two other tasks
load and store floating point registers and check for corruption. This tests
the ability of tasks to safely share floating point hardware resources, even
when switching occurs preemptively. (Note that both sets of tests run
concurrently even though they report their progress at different times.)

The demonstration utilizes microkernel mutex APIs, timers, semaphores,
round robin scheduling, and floating point support.

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

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:

Floating point sharing tests started
===================================================================
Pi calculation OK after 50 (high) + 1 (low) tests (computed 3.141594)
Load and store OK after 100 (high) + 29695 (low) tests
Pi calculation OK after 150 (high) + 2 (low) tests (computed 3.141594)
Load and store OK after 200 (high) + 47593 (low) tests
Pi calculation OK after 250 (high) + 4 (low) tests (computed 3.141594)
Load and store OK after 300 (high) + 66674 (low) tests
Pi calculation OK after 350 (high) + 5 (low) tests (computed 3.141594)
Load and store OK after 400 (high) + 83352 (low) tests
Pi calculation OK after 450 (high) + 7 (low) tests (computed 3.141594)
Load and store OK after 500 (high) + 92290 (low) tests
===================================================================
PROJECT EXECUTION SUCCESSFUL