From owner-freebsd-hackers@FreeBSD.ORG  Thu Jul  7 18:57:14 2011
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Date: Thu, 07 Jul 2011 11:57:13 -0700
From: Yuri <yuri@rawbw.com>
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Subject: Possible to see which requests are in queue contributing to system
 load?
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top(1) shows the load as a number supposedly equal to the resource queue 
length.
But is there a way to detail this information? For example I want the 
system to log which requests to which files by which process/thread are 
in the queue and when they are fulfilled by the scheduler?

Yuri