Bug 613900
| Summary: | [RHEL5.5] TCP bandwidth problems with TPA and bnx2x cards [rhel-5.5.z] | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 5 | Reporter: | RHEL Program Management <pm-rhel> |
| Component: | kernel | Assignee: | Jiri Pirko <jpirko> |
| Status: | CLOSED ERRATA | QA Contact: | Red Hat Kernel QE team <kernel-qe> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 5.5 | CC: | dhoward, fleitner, jeder, jpirko, jwilson, pm-eus, rkhan, sgruszka, sputhenp, tao |
| Target Milestone: | rc | Keywords: | ZStream |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: |
When TPA (Transparent Packet Aggregation) was used with a bnx2x network driver (10 Gb), TCP bandwidth problems occurred, causing transfer rate slowdowns (down to 400 Kb) and network delays. The network traces shown that the reason for the TCP bandwidth problems were TCP delayed ACK mechanisms. This update improves the packet-handling code so that network ACKs are not delayed when using TPA, GRO (Generic Receive Offload), or LRO (Large Receive Offload) with the bnx2x driver, thus leading to increased networking performance.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2010-08-10 18:02:36 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: | 593801 | ||
| Bug Blocks: | |||
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Description
RHEL Program Management
2010-07-13 07:14:36 UTC
in 2.6.18-194.10.1.el5 An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2010-0610.html
Technical note added. If any revisions are required, please edit the "Technical Notes" field
accordingly. All revisions will be proofread by the Engineering Content Services team.
New Contents:
When TPA (Transparent Packet Aggregation) was used with a bnx2x network driver (10 Gb), TCP bandwidth problems occurred, causing transfer rate slowdowns (down to 400 Kb) and network delays. The network traces shown that the reason for the TCP bandwidth problems were TCP delayed ACK mechanisms. This update improves the packet-handling code so that network ACKs are not delayed when using TPA, GRO (Generic Receive Offload), or LRO (Large Receive Offload) with the bnx2x driver, thus leading to increased networking performance.
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