NetBSD Problem Report #37937

From yamt@mwd.biglobe.ne.jp  Fri Feb  1 11:03:59 2008
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Date: Fri,  1 Feb 2008 20:03:58 +0900 (JST)
From: yamt@mwd.biglobe.ne.jp
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To: gnats-bugs@gnats.NetBSD.org
Subject: tcp recv buffer auto scaling seems broken
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>Number:         37937
>Category:       kern
>Synopsis:       tcp recv buffer auto scaling seems broken
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Feb 01 11:05:00 +0000 2008
>Originator:     YAMAMOTO Takashi <yamt@mwd.biglobe.ne.jp>
>Release:        NetBSD 4.99.52
>Organization:

>Environment:
>Description:
	tcp receive buffer auto scaling (sysctl net.inet.tcp.recvbuf_auto)
	seems to assume that tcp timestamps increases relatively fast when
	estimating the rtt.  however, we use 0.5s clock for them.
	(freebsd uses hardclock ticks for the timestamps.)
>How-To-Repeat:
	code inspection.
>Fix:


>Unformatted:

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