This is the mail archive of the systemtap@sourceware.org mailing list for the systemtap project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

Re: tutorial draft checked in

From: William Cohen <wcohen at redhat dot com>
To: "Frank Ch. Eigler" <fche at redhat dot com>
Cc: systemtap at sources dot redhat dot com
Date: Fri, 03 Mar 2006 16:50:13 -0500
Subject: Re: tutorial draft checked in
References: <20060303175653.GE6873@redhat.com> <1141420594.3595.46.camel@dragon>

Thanks for the tutorial.

The counters used by get_cycles() ?  are not synced between processors
this is likely to give wrong results on smp machines, particularly now
with variable clockspeeds. So the examples at the bottom of page 7 are
misleading.

-Will

References:
- tutorial draft checked in
  - From: Frank Ch. Eigler
- Re: tutorial draft checked in
  - From: Martin Hunt

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]