From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <5dd35952b2d07611902ecc6aa98065c1@plan9.bell-labs.com>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] kprof
From: "rob pike, esq." <rob@plan9.bell-labs.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="US-ASCII"
Content-Transfer-Encoding: 7bit
Date: Sun, 21 Apr 2002 12:41:12 -0400
Topicbox-Message-UUID: 793cbdb4-eaca-11e9-9e20-41e7f4b1d025

Prof -d works by rewriting the text of the program to include
statistics-gathering code at each function call/return.  Without
such code at function points in the kernel, kprof -d cannot work.
However, you'll have an awful time managing that statistics-
gathering code in a running kernel with interrupts and such
going on.  Yikes.

-rob