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tests/thread_race: add test for race conditions #8897

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merged 1 commit into from
May 4, 2018
Merged

tests/thread_race: add test for race conditions #8897

merged 1 commit into from
May 4, 2018

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ZetaR60
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@ZetaR60 ZetaR60 commented Apr 7, 2018

This adds a test for race conditions in context switching, especially for AVR_CONTEXT_SWAP_TRIGGER on the ATmega.

Tests for problem in #8896

This was referenced Apr 7, 2018
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ZetaR60 commented Apr 9, 2018

Fixed for #8904

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kYc0o requested changes Apr 11, 2018
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I found some things. I think this PR should be made dependent on #8904 .

tests/thread_race/main.c Outdated
/* Volatile so it is not messed with by optimizations */
volatile uint8_t i;

for (i=0; i<255; i++);
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Here and below (for the if-else statements), please follow coding conventions. You may also run uncrustify on this file to correct it automatically.

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Sorry, still new to RIOT conventions. Uncrustified.

tests/thread_race/main.c Outdated

int main(void)
{
puts("Context swap race condition test application\n");
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Here and below, no need of \n in the puts() function.

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Removed.

tests/thread_race/main.c Outdated
#include "thread.h"

/* board.h for AVR_CONTEXT_SWAP_TRIGGER */
#include "board.h"
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Here and below, I don't like the non-generic nature on this tests, and why AVR should be treated in such special way... I see more convenient to have a generic test which works for all platforms without #ifdefs.

If this is due to #8896, please make this PR dependent on #8904, on which AVR_CONTEXT_SWAP_TRIGGER doesn't exist anymore.

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I was having some false negatives with thread_yield_higher, probably due to the slower clock on mega-xplained. AVR_CONTEXT_SWAP_TRIGGER is now removed.

tests/thread_race/main.c Outdated
#endif

/* Delay so we are not testing for race conditions also */
_spin();
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Can you explain a bit better this spin? If I understood correctly, this test is actually used to test race conditions isn't it?

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The first two checks are verifying that context swaps are working properly. Without these checks a more general problem with context swaps would be reported as a race condition. I added to the outputted text to clarify this.

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ZetaR60 commented Apr 27, 2018 •
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Squashed with requested changes incorporated.

EDIT: Oops; wasn't supposed to squash. Unsquashed from backup. Sorry.

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Looks good. Please squash.

@kYc0o kYc0o added Platform: AVR Platform: This PR/issue effects AVR-based platforms quality defect labels May 3, 2018
@kYc0o kYc0o added this to the Release 2018.07 milestone May 3, 2018
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ZetaR60 commented May 3, 2018

@kYc0o Squashed. Thanks!

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kYc0o approved these changes May 4, 2018
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Sorry, forgot a change.

tests/thread_race/Makefile
include ../Makefile.tests_common

DISABLE_MODULE += auto_init

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I forgot this part. I think this test should be run by the CI on hardware. Can you please add:

TEST_ON_CI_WHITELIST += all

just here?

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Added support for CI hardware testing.

@kYc0o kYc0o added CI: ready for build If set, CI server will compile all applications for all available boards for the labeled PR CI: run tests If set, CI server will run tests on hardware for the labeled PR labels May 4, 2018
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kYc0o commented May 4, 2018

Thanks @ZetaR60 ! Let's see what Murdock has to say.

@kYc0o kYc0o added CI: ready for build If set, CI server will compile all applications for all available boards for the labeled PR and removed CI: ready for build If set, CI server will compile all applications for all available boards for the labeled PR CI: run tests If set, CI server will run tests on hardware for the labeled PR labels May 4, 2018
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kYc0o commented May 4, 2018

Removed tests on hardware because unrelated errors block this PR. However the test added by this PR passed.

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kYc0o commented May 4, 2018

Let's go!

@kYc0o kYc0o merged commit 5519f06 into RIOT-OS:master May 4, 2018
@miri64 miri64 added Type: enhancement The issue suggests enhanceable parts / The PR enhances parts of the codebase / documentation Area: tests Area: tests and testing framework and removed quality defect labels Oct 1, 2018
This was referenced Sep 9, 2019
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Area: tests Area: tests and testing framework CI: ready for build If set, CI server will compile all applications for all available boards for the labeled PR Platform: AVR Platform: This PR/issue effects AVR-based platforms Type: enhancement The issue suggests enhanceable parts / The PR enhances parts of the codebase / documentation
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@ZetaR60 @kYc0o @miri64