Bug 2114612
Summary: | Quincy: High CPU and slow progress during backfill | ||
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Product: | [Red Hat Storage] Red Hat Ceph Storage | Reporter: | Vikhyat Umrao <vumrao> |
Component: | RADOS | Assignee: | Sridhar Seshasayee <sseshasa> |
Status: | CLOSED ERRATA | QA Contact: | skanta |
Severity: | high | Docs Contact: | Eliska <ekristov> |
Priority: | unspecified | ||
Version: | 6.0 | CC: | akupczyk, amathuri, bhubbard, ceph-eng-bugs, cephqe-warriors, choffman, ekristov, ksirivad, lflores, nojha, pdhange, pdhiran, rfriedma, rzarzyns, sangadi, skanta, sseshasa, vereddy, vumrao |
Target Milestone: | --- | Keywords: | Performance |
Target Release: | 6.0 | ||
Hardware: | Unspecified | ||
OS: | Unspecified | ||
Whiteboard: | |||
Fixed In Version: | ceph-17.2.3-3.el9cp | Doc Type: | Bug Fix |
Doc Text: |
.Slow progress and high CPU utilization during backfill is resolved
Previously, the worker thread with the smallest index in an OSD shard would return to the main worker loop, instead of waiting until an item could be scheduled from the mClock queue or until notified.
This resulted in the busy loop and high CPU utilization.
With this fix, the worker thread with the smallest thread index reacquires the appropriate lock and waits until notified, or until time period lapses as indicated by the mClock scheduler.
The worker thread now waits until an item can be scheduled from the mClock queue or until notified and then returns to the main worker loop thereby eliminating the busy loop and solving the high CPU utilization issue.
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Story Points: | --- |
Clone Of: | Environment: | ||
Last Closed: | 2023-03-20 18:57:13 UTC | Type: | Bug |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: | |||
Bug Depends On: | |||
Bug Blocks: | 2126050 |
Description
Vikhyat Umrao
2022-08-02 23:44:47 UTC
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Red Hat Ceph Storage 6.0 Bug Fix update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2023:1360 |