Bug 2214884 - query-stats QMP command interrupts vcpus, the Max Latencies could be more than 100us
Summary: query-stats QMP command interrupts vcpus, the Max Latencies could be more tha...
Keywords:
Status: CLOSED DUPLICATE of bug 2218644
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: qemu-kvm
Version: 9.2
Hardware: x86_64
OS: Unspecified
high
high
Target Milestone: rc
: ---
Assignee: Marcelo Tosatti
QA Contact: Gu Nini
URL:
Whiteboard:
Depends On:
Blocks: 2218644
TreeView+ depends on / blocked
 
Reported: 2023-06-14 03:12 UTC by Gu Nini
Modified: 2023-07-27 03:10 UTC (History)
12 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
: 2218644 (view as bug list)
Environment:
Last Closed: 2023-07-03 07:25:33 UTC
Type: ---
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Gitlab redhat/rhel/src/qemu-kvm qemu-kvm merge_requests 290 0 None None None 2023-06-29 18:17:11 UTC
Red Hat Issue Tracker RHELPLAN-159767 0 None None None 2023-06-14 03:16:38 UTC

Description Gu Nini 2023-06-14 03:12:38 UTC 
Description of problem:
Under ocp4.13/ocp-v 4.13.1-188 env, the real time worker node is installed with RHCOS based on RHEL9.2, it's found "# Max Latencies: 00090 00096 00141" when run 1 hour cyclictest, while a maximum of 50us is acceptable. From Marcelo, it's caused by "query-stats QMP command interrupts vcpus.", "[PATCH] kvm: reuse per-vcpu stats fd to avoid vcpu interruption" was submitted.

Version-Release number of selected component (if applicable):
Host kernel: Scratch kernel 5.14.0-284.13.1.rt14.298kvmrtv1.el9_2.x86_64 
Guest kernel: Scratch kernel 5.14.0-284.13.1.rt14.298kvmrtv1.el9_2.x86_64
Qemu: qemu-kvm-core-7.2.0-14.el9_2.x86_64

How reproducible:
100%

Steps to Reproduce:
1. 
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3.

Actual results:

Expected results:

Additional info:
Comment 3 Miroslav Rezanina 2023-07-03 07:25:33 UTC 
Closing this BZ as clone was approved (9.3.0)  and will be used for z-stream cloning.

*** This bug has been marked as a duplicate of bug 2218644 ***
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