From: Rick Jones <rick.jones2@hp.com>
To: Dmitry Kasatkin <dmitry.kasatkin@gmail.com>,
nic_swsd@realtek.com, romieu@fr.zoreil.com,
netdev@vger.kernel.org
Cc: l.moiseichuk@samsung.com
Subject: Re: throughput problems with realtek
Date: Wed, 15 Jan 2014 08:23:16 -0800 [thread overview]
Message-ID: <52D6B5F4.1060201@hp.com> (raw)
In-Reply-To: <CACE9dm_3jw08_dfXRJRMQ=r4X1NZ1kHF6TZopFSNy3k+DCKgTA@mail.gmail.com>
On 01/15/2014 03:56 AM, Dmitry Kasatkin wrote:
> Hi,
>
> We have several devices with such adapter..
>
> Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411
> PCI Express Gigabit Ethernet Controller (rev 06)
> See output of the lspci -vvv bellow...
>
> And I suddenly investigated throughput issues..
>
> After couple minutes of running 'iperf -c server' transmission speed
> drops substantially...
>
> [ 4] 0.0-10.0 sec 1.10 GBytes 948 Mbits/sec
> [ 5] local 106.122.1.113 port 5001 connected with 106.122.1.121 port 60508
> [ 5] 0.0-10.0 sec 1.10 GBytes 948 Mbits/sec
> [ 4] local 106.122.1.113 port 5001 connected with 106.122.1.121 port 60509
> [ 4] 0.0-10.0 sec 1.10 GBytes 949 Mbits/sec
> [ 5] local 106.122.1.113 port 5001 connected with 106.122.1.121 port 60510
> [ 5] 0.0-10.0 sec 1.10 GBytes 948 Mbits/sec
> [ 4] local 106.122.1.113 port 5001 connected with 106.122.1.121 port 60511
> [ 4] 0.0-10.0 sec 626 MBytes 525 Mbits/sec
> [ 5] local 106.122.1.113 port 5001 connected with 106.122.1.121 port 60512
> [ 5] 0.0-10.0 sec 84.4 MBytes 70.5 Mbits/sec
> [ 4] local 106.122.1.113 port 5001 connected with 106.122.1.121 port 60513
> [ 4] 0.0-10.0 sec 87.4 MBytes 73.0 Mbits/sec
> [ 5] local 106.122.1.113 port 5001 connected with 106.122.1.121 port 60514
>
>
> But it seems after certain time of inactivity (low load) speed will be
> up again...
>
> It happens almost the same way on desktop machines and also on Samsung
> Series 7 laptop NP770Z5E...
>
> Does anyone have any ideas about it?
>
The card flipping back and forth between 1000 and 100 Mbit/s operation
perhaps?
rick jones
next prev parent reply other threads:[~2014-01-15 16:23 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-15 11:56 throughput problems with realtek Dmitry Kasatkin
2014-01-15 12:04 ` Dmitry Kasatkin
2014-01-15 16:23 ` Rick Jones [this message]
2014-01-15 16:25 ` Dmitry Kasatkin
2014-01-15 23:51 ` Francois Romieu
2014-01-16 7:45 ` Dmitry Kasatkin
2014-01-16 18:47 ` Dmitry Kasatkin
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