From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ding Tianhong <dingtianhong@huawei.com>
Date: Tue, 23 Feb 2016 22:39:28 +0800
Subject: [Intel-wired-lan] Ask some help for the performance of Intel 82599
	on Linux 4.1.15
Message-ID: <56CC6F20.4000202@huawei.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
To: intel-wired-lan@osuosl.org
List-ID: <intel-wired-lan.osuosl.org>

Hi Jeff:

I use the Intel 82599 to run benchmark on my machine, the kernel version is 4.1.15, and I found that
when I run a single iperf by one port, the speed looks fine, it could run to 9.45Gb/s, it looks good. 
the command is: iperf -c 15.1.1.1 -t 100 -i 1

But when I run double iperf by two port from one single 82599 card, it looks strange, the speed could
only up the 6Gb/s + 6Gb/s = 12Gb/s, the total speed is not twice as much than one port, I try to
modify some param for tcp windows, it looks no effect, can you give me more suggestion?

Thanks
Ding