I ran some tests. I'm new at this, so bear with me. I set up a new server configuration following the 2.0 HOWTO on openvpn.net.
The server machine is a Windows Vista Ultimate 64-bit on an Intel QX6700 (quad core extreme 2.66GHz) and 8GB RAM. The client is an Ubuntu Hardy 64-bit virtual machine running under VMWare Workstation 6.5 (server is the vm host) using bridged networking. On the client, I installed netserver from netperf-2.4.4 and openvpn-2.1rc7 with network-manager-openvpn. I configured the client with the certificates created when following the HOWTO. I then performed three test phases, first with the server running 2.1rc13 (32-bit), then with the server running the 64-bit test build, then again with the server running 2.1rc13 (32-bit). In each phase, I ran netperf three times from the server, specifying the client VPN address. Here are the results: *** *** rc13 32-bit server *** PS C:\Users\jaraco> netperf -H 10.8.0.6 TCP STREAM TEST to 10.8.0.6 Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 256 8192 8192 10.00 3.24 PS C:\Users\jaraco> netperf -H 10.8.0.6 TCP STREAM TEST to 10.8.0.6 Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 256 8192 8192 10.00 3.20 PS C:\Users\jaraco> netperf -H 10.8.0.6 TCP STREAM TEST to 10.8.0.6 Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 256 8192 8192 10.00 3.16 *** *** 64-bit test compile (server) *** PS C:\Users\jaraco> netperf -H 10.8.0.6 TCP STREAM TEST to 10.8.0.6 Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 256 8192 8192 10.00 3.48 PS C:\Users\jaraco> netperf -H 10.8.0.6 TCP STREAM TEST to 10.8.0.6 Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 256 8192 8192 10.00 3.47 PS C:\Users\jaraco> netperf -H 10.8.0.6 TCP STREAM TEST to 10.8.0.6 Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 256 8192 8192 10.00 3.39 *** *** Again, repeat 32-bit server: *** PS C:\Users\jaraco> netperf -H 10.8.0.6 TCP STREAM TEST to 10.8.0.6 Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 256 8192 8192 10.00 3.09 PS C:\Users\jaraco> netperf -H 10.8.0.6 TCP STREAM TEST to 10.8.0.6 Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 256 8192 8192 10.00 3.15 PS C:\Users\jaraco> netperf -H 10.8.0.6 TCP STREAM TEST to 10.8.0.6 Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 256 8192 8192 10.00 3.16 --- end tests --- It appears as if the 64-bit build does have a 5-10% performance increase over the 32-bit build in this environment. I hope these results are helpful. Unfortunately, I don't have a testbed where I can configure two isolated, clean systems, which would probably result in more deterministic results. Let me know if I can arrange the tests differently to highlight a particular aspect of the performance. Regards, Jason > -----Original Message----- > From: Alon Bar-Lev [mailto:alon.bar...@gmail.com] > Sent: Wednesday, 05 November, 2008 15:53 > To: Jason R. Coombs > Cc: openvpn devel > Subject: Re: [Openvpn-devel] [WINDOWS] Request for test win64 > > Yes. > I think that there are people here who do this for fun... :) > The question is if there is someone with amd64 machine that can > compare previous tests to tests with this version. > > Thanks! > > On 11/5/08, Jason R. Coombs <jar...@jaraco.com> wrote: > > How does one check performance? Run throughput tests through the VPN > > connection in a controlled environment? > > > > > > > -----Original Message----- > > > From: Alon Bar-Lev [mailto:alon.bar...@gmail.com] > > > > > Sent: Wednesday, 05 November, 2008 15:17 > > > To: Jason R. Coombs > > > Cc: openvpn devel > > > Subject: Re: [Openvpn-devel] [WINDOWS] Request for test win64 > > > > > > > > Hello All, > > > > > > Can anyone check the performance of this [1] win64 openvpn build? > > > > > > It contains less assembly code, but C optimization may be better > on > > > 64bit. > > > > > > So you may gain some performance... But it needs to be checked. > > > > > > Alon > > > > > > [1] http://alon.barlev.googlepages.com/openvpn-win64.tar.bz2 > > > >
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