Re: small inconsistency in the "Bytes transferred" and "speed" values

To: iperf-users --at-- dast.nlanr.net
Subject: Re: small inconsistency in the "Bytes transferred" and "speed" values
From: Metod Kozelj <metod.kozelj --at-- lugos.si>
Date: Sun, 15 Jul 2007 08:36:59 +0200
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Hi,

Leese, MJ (Mark) wrote:

If we've transferred 296804352 Bytes in 5 seconds, that's (296804352 / 5.0) * 8 = 474886963 bps, not 474664156.

If you calculate it the other way around:

2097152 Bytes / 474664156 bits/sec = time

then the result is 5.0023 seconds. That would mean that transmission time was not exactly 5 seconds but 2 milliseconds longer, hence slightly lower throughput. Time difference is smaller than resolution of output from iperf.

I'm not saying that there's nothing wrong in iperf's calculation though ;)

--
Peace!
 Mkx

---- perl -e 'print $i=pack(c5,(41*2),sqrt(7056),(unpack(c,H)-2),oct(115),10);'
---- echo 16i[q]sa[ln0=aln100%Pln100/snlbx]sbA0D4D465452snlb xq | dc

References:
- small inconsistency in the "Bytes transferred" and "speed" values
  - From: Leese, MJ \(Mark\)

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