Arch Linux

CapnPolo

Member

Registered: 2008-03-22

Posts: 2

Slow network connection

Hi,

Today I updated my Archlinux install using 'pacman -Syu' and since then I've noticed that my samba shares on the Archlinux server seem very slow when accessed from my windows machine. To be honest I hadn't used the shares for sometime so this problem may have existed before I update Archlinux (although it has been faster previously).

I tested transfers using scp and ftp as well to see how fast the connection was (this is over 100mb ethernet).

For both scp and ftp the results were the same, 6MB/s when copying to the server and only 3MB/s when copying from the server.

Shouldn't I be getting faster speeds than this? I've searched the forums and followed a number of things to try and find a cause but haven't had any success.

Heres the output of ifconfig:

eth0      Link encap:Ethernet  HWaddr 00:02:A5:97:81:EC
          inet addr:192.168.11.10  Bcast:192.168.11.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:388590 errors:0 dropped:0 overruns:0 frame:0
          TX packets:286622 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:451634880 (430.7 Mb)  TX bytes:225199803 (214.7 Mb)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

Originally I was connecting to my router using wireless (802.11g) and it was half as fast again.

Any suggestions?

CapnPolo

Member

Registered: 2008-03-22

Posts: 2

Re: Slow network connection

I've spent the last two days trying to solve this... I've figured out some more things:

Using 'ethtool eth0' I get:

Settings for eth0:
        Supported ports: [ TP MII ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
        Advertised auto-negotiation: Yes
        Speed: 100Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 1
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: g
        Wake-on: g
        Current message level: 0x00000007 (7)
        Link detected: yes

With this setup I'm getting ~3.0MB/s when downloading from archlinux machine using scp.

If I use ethtool to change the settings of eth0 like follows:

ethtool -s eth0 autoneg off speed 10 duplex full

I get the a download speed of ~95KB/s

ethtool -s eth0 autoneg off speed 10 duplex half

I get the a download speed of ~1.1MB/s

ethtool -s eth0 autoneg off speed 100 duplex full

I get the a download speed of ~450KB/s

ethtool -s eth0 autoneg off speed 100 duplex half

I get the a download speed of ~3.0MB/s

Any idea why half duplex works better than full duplex?

I thought my router may have been the problem so I switched over to a plain 100Mbit switch but it made no diffference.