Hi, My machine ethtool -i info.
driver: mlx4_en version: 2.1.6 (Aug 27 2013) firmware-version: 2.5.0 bus-info: 0000:19:00.0 Even after applying patch problem still occur. Can you tell me the reason for this why decrease in Sending side happen ? Is this problem regarding iperf or TCP/IP stack or nic card ? Regards Varun Sharma ---------- Forwarded message ---------- From: Amir Ancel <[email protected]> Date: Wed, Feb 19, 2014 at 2:36 PM Subject: RE: [Iperf-users] Sending rate decrease in TCP bidirectional test . To: Varun Sharma <[email protected]>, "[email protected]" < [email protected]> Cc: Sagi Schlanger <[email protected]> Hi Varun, Can you please share your driver and firmware versions using "ethtool -i ethX" ? Also, attached a patch that fixes bidirectional functional issue. Thanks, Amir Ancel Performance and Power Group Manager www.mellanox.com *From:* Varun Sharma [mailto:[email protected]] *Sent:* Wednesday, February 19, 2014 10:44 AM *To:* [email protected] *Subject:* [Iperf-users] Sending rate decrease in TCP bidirectional test . Hi, I am using iperf v 2.0.5 for testing the Mellanox ConnectX VPI card. Its a dual port 10G card. Two 16 core machines with 64GB RAM are connected back to back. In *TCP Bidirectional test* case sending throughput decrease as compare to *TCP Unidirectional test* case sending . All cases use default setting . No extra parameter is set. In case of 4 Client threads Output comes :-- Unidirectional Send Process --- *9.6* Gbps Bidirectional Send Process ---- *4.9* Gbps In case of 8 Client threads Output comes :-- Unidirectional Send Process --- *9.7* Gbps Bidirectional Send Process -- * 6.4* Gbps In case of 16 Client threads Output comes :-- Unidirectional Send Process ---* 9.7* Gbps Bidirectional Send Process -- *8* Gbps Any reason for this outcome ? Regards Varun
iperf_dual_test_fix.patch
Description: Binary data
------------------------------------------------------------------------------ Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121054471&iu=/4140/ostg.clktrk
_______________________________________________ Iperf-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/iperf-users
