Bug 1016729
| Summary: | Apply IB performance patches to 3.8 realtime kernel | ||
|---|---|---|---|
| Product: | Red Hat Enterprise MRG | Reporter: | Clark Williams <williams> |
| Component: | realtime-kernel | Assignee: | John Kacur <jkacur> |
| Status: | CLOSED ERRATA | QA Contact: | MRG Quality Engineering <mrgqe-bugs> |
| Severity: | high | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 2.4 | CC: | bhu, jkacur, jkastner, jumanjiman, kazen, lgoncalv |
| Target Milestone: | 2.4.3 | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: |
Cause: Various aspects of cache on Infiband, sometimes due to upstream infrastructure changes resulted in potentially bad performance.
Consequence: Poor cache performance on InfiniBand
Fix: 1. Only cache valid GIDs and not empty ones to reduce search time. 2. When searching GIDs on a list of devices, first start with the device that received the request. 3. Change cma_acquire_dev function to search for cached GIDs.
Result: Improved IB performance, potentially pathological (for throughput performance) code paths removed.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2014-01-28 17:39:44 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: | |||
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Description
Clark Williams
2013-10-08 15:14:38 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. http://rhn.redhat.com/errata/RHSA-2014-0100.html |