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Fix profiler check #14677

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merged 10 commits into from
Apr 12, 2019
Merged

Fix profiler check #14677

merged 10 commits into from
Apr 12, 2019

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anirudh2290
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@anirudh2290 anirudh2290 commented Apr 11, 2019 •
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Description

After adding the waitall PR the nightlies started failing and was reported here : #14397 (comment)
This was because waitall rethrowing exceptions that were hidden earlier.
Seems like operator-= for ProfileCounter is called during frees which checks if the amount to be freed is greater than alloced. Added a check before operator is called.

More permanent fix would be to understand why memory pool counters are incorrect when free is called but this PR should stop the profiler nightly test failures.

@ThomasDelteil

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  • The PR title starts with [MXNET-$JIRA_ID], where $JIRA_ID refers to the relevant JIRA issue created (except PRs with tiny changes)
  • Changes are complete (i.e. I finished coding on this PR)
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  • Unit tests are added for small changes to verify correctness (e.g. adding a new operator)
  • Nightly tests are added for complicated/long-running ones (e.g. changing distributed kvstore)
  • Build tests will be added for build configuration changes (e.g. adding a new build option with NCCL)
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  • Feature2, tests, (and when applicable, API doc)

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  • If this change is a backward incompatible change, why must this change be made.
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@anirudh2290 anirudh2290 marked this pull request as ready for review April 11, 2019 22:22
ThomasDelteil
ThomasDelteil reviewed Apr 11, 2019
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tests/python/unittest/test_exc_handling.py
@@ -165,6 +166,46 @@ def test_multiple_waitalls():
assert caught, "No exception thrown"
mx.nd.waitall()

@with_seed()
def test_exc_profiler():
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seems a bit heavy for a unittest, I think passing some nd.ones() through a simple dense layer would do the same right?

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I have simplified it. Please take a look

yuxihu
yuxihu approved these changes Apr 12, 2019
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This PR LGTM. But did you try to investigate why this happened? Can a handle be double freed such that the counter is incorrect? I noticed that we are passing handle by value when calling Free() which is not ideal as the caller might still hold the handle dptr and the handle size is not zeroed.

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@yuxihu Good point I didnt investigate whether handle is getting double freed. I will check the same, though this PR doesn't have to block on it.

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yuxihu commented Apr 12, 2019

@yuxihu Good point I didnt investigate whether handle is getting double freed. I will check the same, though this PR doesn't have to block on it.

Yes, it is good to have the logic implemented in this PR anyway. The investigation can be done separately.

@ThomasDelteil ThomasDelteil merged commit 5fc5c27 into apache:master Apr 12, 2019
larroy pushed a commit to larroy/mxnet that referenced this pull request Apr 15, 2019
@anirudh2290 @larroy
Fix profiler check (apache#14677)
2c0f259 
* Relax constexpr restriction

* Image classifcation mkldnn

* Check mem profiler greater than 0

* Revert "Relax constexpr restriction"

This reverts commit 5016170.

* Revert "Image classifcation mkldnn"

This reverts commit 30bfab2.

* Add test for profiler

* Simplify test
haohuanw pushed a commit to haohuanw/incubator-mxnet that referenced this pull request Jun 23, 2019
@anirudh2290
Fix profiler check (apache#14677)
505a932 
* Relax constexpr restriction

* Image classifcation mkldnn

* Check mem profiler greater than 0

* Revert "Relax constexpr restriction"

This reverts commit 5016170.

* Revert "Image classifcation mkldnn"

This reverts commit 30bfab2.

* Add test for profiler

* Simplify test
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@yuxihu yuxihu yuxihu approved these changes

@ThomasDelteil ThomasDelteil ThomasDelteil approved these changes

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