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fix(userspace/falco): avoid using CPU when main thread waits for parallel event sources #2255

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merged 3 commits into from
Oct 14, 2022

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jasondellaluce
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What type of PR is this?

/kind bug

Any specific area of the project related to this PR?

/area engine

What this PR does / why we need it:

When synchronizing with parallel event sources running in their own thread, the main thread was not put to sleep and consumed CPU with no purpose. Using a semaphore, we're able to let it sync with the additional threads only when at least one signals termination.

Which issue(s) this PR fixes:

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

Signed-off-by: Jason Dellaluce <jasondellaluce@gmail.com>
…s parallelization

Signed-off-by: Jason Dellaluce <jasondellaluce@gmail.com>
…llel event sources

Signed-off-by: Jason Dellaluce <jasondellaluce@gmail.com>
@jasondellaluce
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/milestone 0.33.0

@poiana poiana added this to the 0.33.0 milestone Oct 14, 2022
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@Andreagit97 Andreagit97 left a comment

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/approve

@poiana
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poiana commented Oct 14, 2022

LGTM label has been added.

Git tree hash: da65c815cd72de7ea43f3092599d641c8a02c05d

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@FedeDP FedeDP left a comment

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/approve

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poiana commented Oct 14, 2022

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Andreagit97, FedeDP, jasondellaluce

The full list of commands accepted by this bot can be found here.

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  • OWNERS [Andreagit97,FedeDP,jasondellaluce]

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@poiana poiana merged commit 10fe9fd into master Oct 14, 2022
@poiana poiana deleted the fix/cpu-usage-thread-sync branch October 14, 2022 11:12
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4 participants