Bug#447669: netspeed: reports wrong speeds
lool at dooz.org
Sun Jun 29 19:18:58 UTC 2008
On Tue, Oct 23, 2007, WireSpot wrote:
> netspeed reports larger speeds than normal. For instance, while using
> Firefox to download a file, or apt to upgrade the system; the application
> (Firefox or apt) would report for example 350 KB/sec, while netspeed would
> report 575 KB/sec.
> I realise that there's a discrepancy between the data amount in application
> terms and the data in raw interface terms. However, I also checked with
> iptraf and while it also reports greater speeds than the applications, it is
> only a minor increase: 370 KB/sec when the application reports 350.
I believe netspeed relies on the interface byte counters which in the
case of Ethernet will count Ethernet frames, even broadcast ones. If
you're on a busy LAN with Windows host, you'll typically experience a
non-null amount of traffic.
Could you try measuring traffic with wireshark and see whether
netspeed's traffic matches the wireshark Ethernet counters?
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