From: santosh tatoju <santosh_tatoju@yahoo.co.in>
To: binutils@sourceware.org
Subject: gprof - reg
Date: Sun, 01 May 2011 11:54:00 -0000 [thread overview]
Message-ID: <16808.99701.qm@web95206.mail.in2.yahoo.com> (raw)
Hi all,
I am currently working on gprof utility. I need a clarification on the following.
To determine the execution time of a function, gprof uses sampling method by collecting samples of program counter at regular intervals of time. It provides a statistical approximation of execution time.
Other method is to measure the lapsed time between function entry and function exit. This method is simple and will provide exact timings.
Why the first method is used in spite of its overhead? why the second method is not adopted for evaluating function execution time? What are the advantages of using the first method over the second?
Pls do respond, Thanks in advance.
next reply other threads:[~2011-05-01 11:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-01 11:54 santosh tatoju [this message]
2011-05-10 15:38 ` Nick Clifton
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