From: Martin Hunt <hunt@redhat.com>
To: "Frank Ch. Eigler" <fche@redhat.com>
Cc: David A Sperry <David_A_Sperry@raytheon.com>,
"systemtap@sources.redhat.com"
<systemtap@sources.redhat.com>
Subject: Re: Another Newbie question about measuring time in a sys call
Date: Wed, 08 Feb 2006 17:38:00 -0000 [thread overview]
Message-ID: <1139420346.3948.5.camel@monkey2> (raw)
In-Reply-To: <y0mpslxom2p.fsf@ton.toronto.redhat.com>
On Wed, 2006-02-08 at 11:24 -0500, Frank Ch. Eigler wrote:
> David_A_Sperry wrote:
>
> > [...]
> > > AFAIK, top does not perform any file creation. [...]
> >
> > I was lazy and just modified the prinf line. [...]
> > syscall creat count 6772 avg 37 min 32 max 103
> > [...]
>
> A glance at src/tapset/syscalls.stp explains the problem. There, the
> "sys_open" function is probed and mislabeled "creat".
One of the many problems with the old syscall tapset. Lots of functions
are probed under multiple names. The tapset is currently being rewritten
and is not to be trusted. I'll send out an email when the rewrite is
complete, along with some sample code to show how to do profiling and
tracing using it.
Martin
next prev parent reply other threads:[~2006-02-08 17:38 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-08 1:29 David A Sperry
2006-02-08 1:52 ` Li Guanglei
2006-02-08 5:56 ` Li Guanglei
2006-02-08 12:32 ` Frank Ch. Eigler
2006-02-08 13:46 ` David A Sperry
2006-02-08 15:18 ` Frank Ch. Eigler
2006-02-08 15:54 ` David A Sperry
2006-02-08 16:24 ` Frank Ch. Eigler
2006-02-08 17:38 ` Martin Hunt [this message]
2006-02-08 21:14 ` Martin Hunt
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