Hi georgesak@, I'm assigning to you because blames shows you implemented the GetSystemMemoryInfo on Mac, but not sure if you are the right person to handle this, feel free to re-assign.

The flake is likely to be caused by https://codereview.chromium.org/2558043007.

I think process_metrics_ios.mm is relevant here, recently touched in https://chromium.googlesource.com/chromium/src/+/01ac10b7938701bc9f9f2c05faf18229f9573b4c

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/71606ecc2ff8f79fd8aa0b9d6f41c8f747a6d470

commit 71606ecc2ff8f79fd8aa0b9d6f41c8f747a6d470
Author: liaoyuke <liaoyuke@chromium.org>
Date: Thu Apr 13 22:46:17 2017

Disable invalid assertion in GetSystemMemoryInfo test on iOS.

SystemMetrics2Test.GetSystemMemoryInfo is flaky on iOS devices and
fails on the following line: EXPECT_LT(info.free, info.total). The test
fails about 30 runs during the past 100 builds.

This CL disables the invalid assertion.

BUG=711450

Review-Url: https://codereview.chromium.org/2814303003
Cr-Commit-Position: refs/heads/master@{#464583}

[modify] https://crrev.com/71606ecc2ff8f79fd8aa0b9d6f41c8f747a6d470/base/process/process_metrics_unittest.cc

I'm the author of that EXPECT_LT. Could you post here its failures/logs plz? I
(I do't have an access to the builds above)

Thanks for looking at it!

Sure, below is the one of the logs, the other two look similar, let me know if you need me to post all of the three.


[----------] 1 test from SystemMetrics2Test
[ RUN      ] SystemMetrics2Test.GetSystemMemoryInfo
../../base/process/process_metrics_unittest.cc:422: Failure
Expected: (info.free) < (info.total), actual: 1042928 vs 997376
[  FAILED  ] SystemMetrics2Test.GetSystemMemoryInfo (1 ms)
[----------] 1 test from SystemMetrics2Test (2 ms total)

Retry #1 for SystemMetrics2Test.GetSystemMemoryInfo.

idevice-app-runner --udid cac6fdb0640d5c6ffebc912b30c6082901e5c7ad --start com.google.gtest.base-unittests -D GKIF_SCENARIO_FILTER=NAME:SystemMetrics2Test.GetSystemMemoryInfo --args --gtest_filter=SystemMetrics2Test.GetSystemMemoryInfo

Detected presence of a debugger, running without test timeouts.
Note: Google Test filter = SystemMetrics2Test.GetSystemMemoryInfo
[==========] Running 1 test from 1 test case.
[----------] Global test environment set-up.
[----------] 1 test from SystemMetrics2Test
[ RUN      ] SystemMetrics2Test.GetSystemMemoryInfo
../../base/process/process_metrics_unittest.cc:422: Failure
Expected: (info.free) < (info.total), actual: 1068272 vs 997376
[  FAILED  ] SystemMetrics2Test.GetSystemMemoryInfo (0 ms)
[----------] 1 test from SystemMetrics2Test (3 ms total)

[----------] Global test environment tear-down
[==========] 1 test from 1 test case ran. (4 ms total)
[  PASSED  ] 0 tests.
[  FAILED  ] 1 test, listed below:
[  FAILED  ] SystemMetrics2Test.GetSystemMemoryInfo

 1 FAILED TEST
idevice-app-runner returned 0

Retry #2 for SystemMetrics2Test.GetSystemMemoryInfo.

idevice-app-runner --udid cac6fdb0640d5c6ffebc912b30c6082901e5c7ad --start com.google.gtest.base-unittests -D GKIF_SCENARIO_FILTER=NAME:SystemMetrics2Test.GetSystemMemoryInfo --args --gtest_filter=SystemMetrics2Test.GetSystemMemoryInfo

Detected presence of a debugger, running without test timeouts.
Note: Google Test filter = SystemMetrics2Test.GetSystemMemoryInfo
[==========] Running 1 test from 1 test case.
[----------] Global test environment set-up.
[----------] 1 test from SystemMetrics2Test
[ RUN      ] SystemMetrics2Test.GetSystemMemoryInfo
../../base/process/process_metrics_unittest.cc:422: Failure
Expected: (info.free) < (info.total), actual: 1058336 vs 997376
[  FAILED  ] SystemMetrics2Test.GetSystemMemoryInfo (1 ms)
[----------] 1 test from SystemMetrics2Test (2 ms total)

[----------] Global test environment tear-down
[==========] 1 test from 1 test case ran. (2 ms total)
[  PASSED  ] 0 tests.
[  FAILED  ] 1 test, listed below:
[  FAILED  ] SystemMetrics2Test.GetSystemMemoryInfo

 1 FAILED TEST
idevice-app-runner returned 0

Retry #3 for SystemMetrics2Test.GetSystemMemoryInfo.

idevice-app-runner --udid cac6fdb0640d5c6ffebc912b30c6082901e5c7ad --start com.google.gtest.base-unittests -D GKIF_SCENARIO_FILTER=NAME:SystemMetrics2Test.GetSystemMemoryInfo --args --gtest_filter=SystemMetrics2Test.GetSystemMemoryInfo

Detected presence of a debugger, running without test timeouts.
Note: Google Test filter = SystemMetrics2Test.GetSystemMemoryInfo
[==========] Running 1 test from 1 test case.
[----------] Global test environment set-up.
[----------] 1 test from SystemMetrics2Test
[ RUN      ] SystemMetrics2Test.GetSystemMemoryInfo
../../base/process/process_metrics_unittest.cc:422: Failure
Expected: (info.free) < (info.total), actual: 1066912 vs 997376
[  FAILED  ] SystemMetrics2Test.GetSystemMemoryInfo (1 ms)
[----------] 1 test from SystemMetrics2Test (2 ms total)

[----------] Global test environment tear-down
[==========] 1 test from 1 test case ran. (2 ms total)
[  PASSED  ] 0 tests.
[  FAILED  ] 1 test, listed below:
[  FAILED  ] SystemMetrics2Test.GetSystemMemoryInfo

mkolom@ any update on the fix?

Removing RBB as this test is only flaky and disabled on devices.