780
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Ran 19 Mar 2015 03:29AM UTC

Jobs 1

Files 62

Run time 4min

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Build # 780

Build Type

push

travis-ci

Committed by

ben-manes

Commit Message

Use one-shot capacity buffer for improved performance

Previously the buffer was over allocated with a threshold to record reads while
a drain was in process. This wastes space and requires an extra volatile read
that adds overhead. The buffer was lossy to avoid contention by allowing
producers to overwrite each other and not write strictly in a sequential order.
This reduced contention at the cost of extra stores and potential for garbage
to be stuck in the buffer until the next full cycle.

The one-shot buffer peeks at the next write index. If it is free, it attempts
to write an element and updates the counter. If the buffer is detectably full,
then a drain is requested.

Coverage Stats

3672 of 4018 relevant lines covered (91.39%)

0.91 hits per line

Jobs

ID	Job ID	Ran	Files	Coverage
1	780.1 (TERM=dumb)	19 Mar 2015 03:29AM UTC	0	91.39	Travis Job 780.1

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