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Re: [Openvpn-users] performance numbers part 2


  • Subject: Re: [Openvpn-users] performance numbers part 2
  • From: "Prasanna Krishnamoorthy" <prasanna79@xxxxxxxxx>
  • Date: Fri, 14 Dec 2007 12:00:29 +0530

On Dec 14, 2007 11:19 AM, KT <krt2941@xxxxxxxxxxx> wrote:
> > On Dec 14, 2007 9:44 AM, kt o <krt2941@xxxxxxxxxxx> wrote:
>
> >> Client(Opteron) -> Server(Athlon): (i.e. client runs netperf and server runs netserver)
> >> Dev Tun, plaintext, no-LZO: 48.82, 49.62, 48.30, 49.70
> >>
> >> Server(Athlon)->Client (Opteron): (i.e. client runs netserver and server run netperf)
> >> Dev Tun, plaintext, no-LZO: 63.70, 64.03, 61.06, 63.73
>
> That's a good idea... here's the numbers:
>
> Opteron (Server) -> Athlon (client)
> Dev tun, plaintext, no-LZO: 51.02, 50.57, 52.71, 51.93
> Hamachi: 65.45, 65.92, 65.98, 65.50
> No VPN: 91.15, 91.61
>
> Athlon(Client) -> Operton(Server)
> Dev tun, plaintext, no-LZO: 67.65, 67.22, 67.29, 67.32
> Hamachi: 54.19, 57.29, 55.90, 55.64
> No VPN: 89.39, 92.12
>
> Strange that the absolute throughput values went up for OpenVPN.  The
> Hamachi and no-vpn absolute numbers barely changed.  But still, the same
> strange relative results depending on direction of traffic.

What I see is, for OpenVPN,
 * Opteron to Athlon is at 51Mbps.
 * Athlon to Opteron, between 61Mbps and 67Mbps (there seems to be
unusually high variability for your runs with server (Athlon) ->
client (Opteron)).

Hamachi shows exactly the inverse behaviour strangely.

Of course this could very well be a Win2003/WinXP issue with the tun
drivers. Only your experiment with WinXP can rule that out. Although
if you're going to do that on a Core2Duo that's going to add an
additional variable :(.

Any chance of testing with two machine with same OS, with near
identical processors?

Once again, thank you for the experiments!
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