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f6122547d7
Summary: Depends on D19753. Ref T13210. This is a small optimization that saves us from waiting up to 15 seconds for a yield. When there are no Working Copy resources and a new lease comes in, we'll allocate one and yield until it activates. If activating it (SSH'ing and running `git clone`) takes less than 15 seconds, the resource will activate (say, at T+4) but the lease won't update again for a while (say, until T+15). This leaves us with a pointless wait (in this example, we're sitting around for 9 seconds when we could move forward). To improve this a little bit, let resources wake up the lease update tasks that triggered allocation after they activate. In the best case, that task runs ~15 seconds sooner. In the worst case, the awaken is just a no-op. With a more-full queue, this has a smaller effect (it's likely something else will run and be able to use the resource in those 9 seconds). With already-activated resources, this has no effect (when resources are already activated, we can lease immediately). Test Plan: - Cleaned up all working copy resources. - Requested a new "A" working copy. - Before patch: got a working copy after 17-18 seconds, most of which was spent yielded. - After patch: got a working copy after 3-4 seconds. Reviewers: amckinley Reviewed By: amckinley Subscribers: PHID-OPKG-gm6ozazyms6q6i22gyam Maniphest Tasks: T13210 Differential Revision: https://secure.phabricator.com/D19754 |
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