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Increase clock tolerance in Flash HAL test 

The current 0.1% clock tolerance is too small for certain platforms
which natural variance is larger than this. This commit increases the
tolerance to 0.5% instead.

Sample output from time_cpu_cycles called repeatedly in init,
before running any flash tests:

[1515706585.63][CONN][RXD] diff: 49316
[1515706585.69][CONN][RXD] diff: 49256
[1515706585.75][CONN][RXD] diff: 49286
[1515706585.81][CONN][RXD] diff: 49256
[1515706585.87][CONN][RXD] diff: 49225
[1515706585.94][CONN][RXD] diff: 49286
[1515706585.99][CONN][RXD] diff: 49317
[1515706586.06][CONN][RXD] diff: 49255
[1515706586.12][CONN][RXD] diff: 49286
[1515706586.18][CONN][RXD] diff: 49285
[1515706586.24][CONN][RXD] diff: 49286
[1515706586.31][CONN][RXD] diff: 49347
[1515706586.36][CONN][RXD] diff: 49347
[1515706586.43][CONN][RXD] diff: 49286
[1515706586.49][CONN][RXD] diff: 49286
[1515706586.55][CONN][RXD] diff: 49256
[1515706586.61][CONN][RXD] diff: 49286
[1515706586.68][CONN][RXD] diff: 49346
[1515706586.74][CONN][RXD] diff: 49347
[1515706586.80][CONN][RXD] diff: 49256

Notice the outliers will cause intermittent CI failures.
pull/5831/head
Marcus Chang 2018-01-11 13:38:54 -08:00
parent af9e07357a
commit d60bed2da9
1 changed files with 1 additions and 1 deletions
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2
TESTS/mbed_hal/flash/functional_tests/main.cpp
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@ -28,7 +28,7 @@
using namespace utest::v1; using namespace utest::v1;
#define TEST_CYCLES 1000000 #define TEST_CYCLES 1000000
#define ALLOWED_DRIFT_PPM 1000 //0.1% #define ALLOWED_DRIFT_PPM 5000 //0.5%
/* /*
return values to be checked are documented at: return values to be checked are documented at: