From owner-freebsd-performance@FreeBSD.ORG  Thu Jun 14 10:20:35 2007
Return-Path: <owner-freebsd-performance@FreeBSD.ORG>
X-Original-To: freebsd-performance@freebsd.org
Delivered-To: freebsd-performance@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id CE6BD16A468
	for <freebsd-performance@freebsd.org>;
	Thu, 14 Jun 2007 10:20:35 +0000 (UTC)
	(envelope-from redcrash@gmail.com)
Received: from an-out-0708.google.com (an-out-0708.google.com [209.85.132.250])
	by mx1.freebsd.org (Postfix) with ESMTP id 8E18613C457
	for <freebsd-performance@freebsd.org>;
	Thu, 14 Jun 2007 10:20:35 +0000 (UTC)
	(envelope-from redcrash@gmail.com)
Received: by an-out-0708.google.com with SMTP id c14so122400anc
	for <freebsd-performance@freebsd.org>;
	Thu, 14 Jun 2007 03:20:34 -0700 (PDT)
DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta;
	h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:references;
	b=tkHR5ACA1hBAsNSWx75zeaTtE/ovF6Y1lmz4m37dKEbXhACg/R7ynlRJFsuhbK/E54JTLha3ZnSbh4yg/ltmnDM2U1C9maGy5oHUlQOGktxm1uNFD+mioTL19ofPaf7HD9JjGLY2UZ30Ovu+jLRUTJajKu8QmW1p3UT7q+699Ds=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta;
	h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:references;
	b=IQKHbIUbCn99iKlnWPQ5CetNArTcSxi7wX18CuPyHFMB6tHCQ5zDZwmEjPEQPajjNCfFexBBt3GegbxY9suvfDXtfke+tZydywg/sBaHHw7wc+BoBuVTYonOmeQ/6wKJfg5njT5m0xajD8+i9eVsgmKP6y81kEpppUfZHZns40g=
Received: by 10.100.141.13 with SMTP id o13mr1002122and.1181816434864;
	Thu, 14 Jun 2007 03:20:34 -0700 (PDT)
Received: by 10.100.141.3 with HTTP; Thu, 14 Jun 2007 03:20:34 -0700 (PDT)
Message-ID: <d825e0270706140320xf6db520q4c72ab995b01509f@mail.gmail.com>
Date: Thu, 14 Jun 2007 12:20:34 +0200
From: "Harald Servat" <redcrash@gmail.com>
To: "Thomas Vogt" <freebsdlists@bsdunix.ch>
In-Reply-To: <4671118D.1040404@bsdunix.ch>
MIME-Version: 1.0
References: <d825e0270706140152j6012592ah18beef95942bb051@mail.gmail.com>
	<4671118D.1040404@bsdunix.ch>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
X-Content-Filtered-By: Mailman/MimeDel 2.1.5
Cc: freebsd-performance@freebsd.org
Subject: Re: PAPI in the ports
X-BeenThere: freebsd-performance@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Performance/tuning <freebsd-performance.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-performance>,
	<mailto:freebsd-performance-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-performance>
List-Post: <mailto:freebsd-performance@freebsd.org>
List-Help: <mailto:freebsd-performance-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-performance>,
	<mailto:freebsd-performance-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 14 Jun 2007 10:20:35 -0000

Hello,

2007/6/14, Thomas Vogt <freebsdlists@bsdunix.ch>:
>
> Hi
>
> Thats sounds nice. You wrote "The goal of the PmcTools project is to
> provide FreeBSD's developers and system administrators with
> non-intrusive, low-overhead and innovative ways of measuring and
> analysing system performance" your website. Have you ever measured the
> performance impact of such tools?


No, I didn't, I just did the port.

But maybe Joseph Koshy (who is the author of PMCTools) has measurements of
the PMC library on different machines/environments. See
http://wiki.freebsd.org/PmcTools or contact him directly.

The port itself is based directly on the PMCtools (i.e. it's almost a
wrapper to convert PAPI calls into PMC calls), so I don't think that PAPI
adds too much overhead to this basic library.

I'm interested to run such tool on production machines in the future but
> only if the performance impact isn't that high.
>
> Regards,
> Thomas
>
> Harald Servat wrote:
> > Hello,
> >
> >  I'm glad to announce you that PAPI-3.5.0 has reached the FreeBSD ports
> > tree and now it's generally available for all FreeBSD users.
> >
> >  Port information is available at
> > http://www.freebsd.org/cgi/ports.cgi?query=papi&stype=all&sektion=devel
> >
> >  See http://code.google.com/p/papi-for-freebsd/wiki/HowToInstall for
> > installation instructions.
> >
> >  There are some issues with P4 processors that need to be fixed on
> > PAPI_write / PAPI_reset routines, but the package have the minimal (and
> > most
> > important functionality) working fine for the rest of the substrates.
> >
> > Regards,
>


Regards,
-- 
_________________________________________________________________
Empty your memory,
with a free()...
like a pointer!

If you cast a pointer to an integer,
it becomes an integer,
if you cast a pointer to a struct,
it becomes a struct.

The pointer can crash...,
and can overflow.

Be a pointer my friend...