Date: Mon, 07 Oct 2013 19:44:51 +0400 From: =?UTF-8?B?S29uc3RhbnRpbiBLdXp2ZXNvdg==?= <kuzvesov@list.ru> To: =?UTF-8?B?ZnJlZWJzZC1uZXRAZnJlZWJzZC5vcmc=?= <freebsd-net@freebsd.org> Subject: =?UTF-8?B?UmVbM106IEFzc3ltZXRyaWMgTklDIHBlcmZvcm1hbmNlIHByb2JsZW0=?= Message-ID: <1381160691.954872513@f116.i.mail.ru>
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I've got a FreeBSD file server running Samba, file upload speeds are okay, but downloads are too slow. First, I decided it is Samba's fault, but then I ran iperf tests... On a windows machine with gigabit NIC: Z:\iperf>iperf -c 192.168.0.1 ------------------------------------------------------------ Client connecting to 192.168.0.1, TCP port 5001 TCP window size: 64.0 KByte (default) ------------------------------------------------------------ [ 3] local 192.168.0.2 port 1064 connected with 192.168.0.1 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.2 sec 12.4 MBytes 10.2 Mbits/sec Z:\iperf>iperf -s ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 64.0 KByte (default) ------------------------------------------------------------ [ 4] local 192.168.0.2 port 5001 connected with 192.168.0.1 port 41220 [ ID] Interval Transfer Bandwidth [ 4] 0.0-10.0 sec 716 MBytes 600 Mbits/sec And on a another with FastEthernet NIC: C:\iperf>iperf.exe -c 192.168.0.1 ------------------------------------------------------------ Client connecting to 192.168.0.1, TCP port 5001 TCP window size: 64.0 KByte (default) ------------------------------------------------------------ [ 3] local 192.168.0.5 port 4756 connected with 192.168.0.1 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.1 sec 11.4 MBytes 9.42 Mbits/sec C:\iperf>iperf.exe -s ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 64.0 KByte (default) ------------------------------------------------------------ [ 4] local 192.168.0.5 port 5001 connected with 192.168.0.1 port 18558 [ ID] Interval Transfer Bandwidth [ 4] 0.0-10.0 sec 106 MBytes 88.5 Mbits/sec Both tests show server's NIC performance degradation to around 10Mbit/s when traffic goes from server to client. And everything works fine in other direction. I verified the cables and hub by simply connecting server and a test machine with a new short patch cord. I tried to change server's NIC from D-Link DGE-528T to Planet ENW-9604. And it became even worse - using Planet NIC speeds slowed down to around 500Mbit/s to server and the same 10Mbit/s to client. I tried to change NIC's media to 100BaseTX, it didn't help too. What else should I try to fix the problem? Maybe my system requires is just misconfigured? System configuration: OS: FreeBSD 9.2-release Kernel: generic Firewall: none /boot/loader.conf - load zfs modules only /etc/sysctl.conf - empty NIC: D-Link DGE-528T / Planet ENW-9604 > Hello, > > I have a problem with NIC performance. Is this the right place to ask for help? > Probably, if you are able to provide some more detailed information :) -- Konstantin Kuzvesov
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