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[SYCL]Fixes a performance issue due to https://github.com/intel/llvm/… - #3797
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This change does two things to fix the performance issue. The first is in the level zero plugin. Here the change is to only close and submit the batch if the event being queried is one that will be signalled one of the commands in the batch. The second change is in the sycl run-time itself. This change prevents the event cleanup code from querying every single event that is outstanding in the system. This is necessary to prevent the most recent events (which are likely to be in the plug-ins batch) from being queried. Both changes are required to fix the performance issue.
romanovvlad
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May 21, 2021
romanovvlad
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Could you please add a test/extend existing one?
Example of a test for sycl::queue:
sycl/source see unittests/queue/EventClear.cpp
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Done. Updated unittests/queue/EventClear.cpp |
romanovvlad
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May 21, 2021
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…pull/3612
This change does two things to fix the performance issue.
The first is in the level zero plugin. Here the change is to only
close and submit the batch if the event being queried is one that
will be signalled one of the commands in the batch.
The second change is in the sycl run-time itself. This change
prevents the event cleanup code from querying every single event
that is outstanding in the system. This is necessary to prevent
the most recent events (which are likely to be in the plug-ins batch)
from being queried.
Both changes are required to fix the performance issue.