This bug has been copied from bug #593801 and has been proposed
to be backported to 5.5 z-stream (EUS).
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.
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.
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.