Bug 1284553
| Summary: | hackbench: modify to run within NUMA node to avoid cross-node traffic | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Jan Kurik <jkurik> |
| Component: | rteval | Assignee: | Clark Williams <williams> |
| Status: | CLOSED ERRATA | QA Contact: | Network QE <network-qe> |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | 7.3 | CC: | bhu, jkastner, lmiksik, mnavrati, williams |
| Target Milestone: | rc | Keywords: | ZStream |
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: |
The rteval tool uses the hackbench utility to place a load on the system to exercise memory allocation, free and memory copies. Prior to this update, rteval started its loads across the entire set of CPUs, which generated large amounts of cross-node memory traffic. As a consequence, latency spikes could occur. With this update, hackbench has been modified to run a single instance for each Non-Uniform Memory Acces (NUMA) node in the system to better reflect common system tuning for a real-time environment, and the latency spikes no longer occur.
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Story Points: | --- |
| Clone Of: | 1282826 | Environment: | |
| Last Closed: | 2016-02-16 10:13:27 UTC | Type: | --- |
| 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: | 1282826, 1284980 | ||
| Bug Blocks: | |||
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Description
Jan Kurik
2015-11-23 15:02:20 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, 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://rhn.redhat.com/errata/RHBA-2016-0200.html |