Date: Fri, 23 Nov 2012 17:03:48 +0100 From: Ingo Flaschberger <if@xip.at> To: freebsd-net@freebsd.org Subject: Re: Low Bandwidth on intercontinental connections Message-ID: <50AF9E64.60405@xip.at> In-Reply-To: <50AF965D.5050301@mpeters.org> References: <50ACF62C.8000408@mpeters.org> <CAOgwaMuUuJ2%2BmKqsFVp=DyVFkfm8Et%2Brnt2iEGDO8i1Kt_kDVA@mail.gmail.com> <50ad087d.1892cc0a.2cce.3bf2@mx.google.com> <50AD1012.7020209@mpeters.org> <50AD14F8.8050001@xip.at> <50ADE5E4.9090708@mpeters.org> <50AE0B12.8000309@xip.at> <50AE1CCC.7080706@mpeters.org> <50AE2686.8070007@xip.at> <50AE47D4.7080608@mpeters.org> <CAJ-VmokpTkXg5_O-Ut6k6EUqEPD26vspYjJtP8=P9-EKD6TiBw@mail.gmail.com> <50AF7070.50206@mpeters.org> <50AF8C2A.7010006@xip.at> <50AF965D.5050301@mpeters.org>
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The sender dump shows, that the network-card does tso.
From Marc's dump at receiver site:
network io bits/sec:
FreeBSD: http://devel.crossip.net/freebsd_receiver.jpg
Linux: http://devel.crossip.net/linux_receiver.jpg
During the "breaks" between the transfer, I see tcp retransmissions (but
slow).
window scaling:
FreeBSD: http://devel.crossip.net/freebsd_window_size.jpg
Linux: http://devel.crossip.net/linux_window_size.jpg
But window scaling keeps
time sequence graph (stevens):
FreeBSD:
http://devel.crossip.net/freebsd_time_sequence_graph_stevens.jpg
Linux: http://devel.crossip.net/linux_time_sequence_graph_stevens.jpg
round trip time:
FreeBSD: http://devel.crossip.net/freebsd_round_trip_time.jpg
Linux: http://devel.crossip.net/linux_round_trip_time.jpg
Kind regards,
Ingo Flaschberger
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