On 1/15/21 1:11 AM, Raffaele BELARDI wrote:
>> -----Original Message-----
>> From: [email protected] <[email protected]>
>> Sent: Friday, January 15, 2021 07:57
>> To: Gentoo mailing list <[email protected]>
>> Subject: [gentoo-user] network transfer speed
>>
>>
>> On both of my systems the network card speed is showing 1000
>> cat /sys/class/net/enp4s0/speed 1000
>>
>> but when I do rsync larage file I only see about: 20 to 22MB/s On my home
>> network I get about 110MB/s between PC's
>>
>> Both PC's have SSD and the swith is Gigabit (I think).
>> How to find a the bottleneck?
>
> If the PCs attached to the switch show 1000 then the switch _is_ gigabit.
>
> On my 1Gb home network I have an FTP transfer speed between Gentoo PCs A and
> B of almost 900Mbps, the other way round is almost half of that. One
> difference between the two systems is the disk, A uses SATA-2 disk while B
> has SATA-3.
>
> Does the 'B' in 110MB/s stand for byte? If so you have 880Mbps which is not
> bad, the problem probably lies somewhere else. Otherwise you could check the
> switch error count (if you have a managed switch) or the network card error
> count, just to ensure you don't have a cabling/connector problem.
>
> Have you tried other transfer methods just for comparison? I think FTP is
> still the fastest way to transfer files, though insecure or inconvenient as
> it might be. I have no experience with rsync.
>
> raffaele
On a remote network I run ethtool on both cards and I got both 1000Mb/s speed
1.)
ethtool net0
Settings for net0:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Advertised pause frame use: Symmetric Receive-only
Advertised auto-negotiation: Yes
Link partner advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Link partner advertised pause frame use: Symmetric
Link partner advertised auto-negotiation: Yes
Speed: 1000Mb/s
Duplex: Full
Port: MII
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
MDI-X: on (auto)
2.)
ethtool enp4s0
Settings for enp4s0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: Symmetric
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: Symmetric
Advertised auto-negotiation: Yes
Speed: 1000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
MDI-X: on (auto)
