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Date:      Sun, 21 Jul 2002 14:57:30 -0500
From:      Dan Nelson <dnelson@allantgroup.com>
To:        Stefan Schwarzer <sschwarzer@sschwarzer.net>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: top(1) blocks
Message-ID:  <20020721195730.GH40625@dan.emsphone.com>
In-Reply-To: <3D3AD89E.3000104@sschwarzer.net>
References:  <3D3AD89E.3000104@sschwarzer.net>

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In the last episode (Jul 21), Stefan Schwarzer said:
> On one of our FreeBSD server invoking top(1) blocks (as if had
> entered cat instead of top). Something about the machine:
> 
> purpurea# uname -a
> FreeBSD purpurea.rz.tu-clausthal.de 4.6-RELEASE-p1 FreeBSD 4.6-RELEASE-p1 #4: Tue Jul 16 19:01:33 CEST 2002 root@purpurea.rz.tu-clausthal.de:/usr/obj/usr/src/sys/PURPUREA  i386
> 
> (This is an AMD double processor system (AMD Athlon XP 1600+). SMP is
> activated in the kernel configuration. According to dmesg, the second
> CPU is enabled on boot.)
> 
> The problem:
> 
> purpurea# top
> ^C

Hit ^T here instead of ^C.  That will print a status line saying where
top is blocking in the kernel.  Also try ktrace'ing it, hit ^C, and use
kdump to see what top was doing when you hit ^C.

-- 
	Dan Nelson
	dnelson@allantgroup.com

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