Date: Sat, 5 Oct 2002 11:20:13 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: Alexander Leidinger <Alexander@Leidinger.net> Cc: current@FreeBSD.ORG Subject: Re: Meaning of net.inet.tcp.inflight_debug output? Message-ID: <200210051820.g95IKDgJ038554@apollo.backplane.com> References: <20021004135022.3decb56f.Alexander@Leidinger.net> <200210041834.g94IYkBR003033@apollo.backplane.com> <20021005110923.0c9d9a68.Alexander@Leidinger.net>
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:
:On Fri, 4 Oct 2002 11:34:46 -0700 (PDT)
:Matthew Dillon <dillon@apollo.backplane.com> wrote:
:
:> When you turn the debugging on it will print out various
:> parameters used to calculate the bandwidth window. The higher the
:> debug value, the more often it prints out the stats (assuming a
:> TCP is under load). Since the stats may reflect any tcp connection
:> you typically only do this while running a single TCP connection
:> under heavy load.
:
:So shouldn't it be off by default?
:
:> rttbest and srtt are scaled to hz * 32, I believe (I'm not
:> positive). So with the default 100 hz it would be scaled to 3200,
:> so an rttbest of 680 would translate to 212mS. Sounds like a
:> connection over a modem.
:
:On my side there's a DSL line (768k up / 128k down), I don't know what
:was on the other side for this particular example.
:
:Bye,
:Alexander.
Well, it's an experimental feature. The whole feature is turned
off by default but in -current debugging is turned on by default
if you turn the feature on. In -stable debugging is turned off
by default to avoid confusion.
In anycase, I could change the debugging default to off in
-current but I can't do it right this moment. I'll try to
remember to do it tonight.
-Matt
Matthew Dillon
<dillon@backplane.com>
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