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Date: Fri, 22 Jun 2007 12:40:10 +0200
From: "Harald Servat" <redcrash@gmail.com>
To: "Stanislav Sedov" <stas@freebsd.org>
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Cc: freebsd-performance@freebsd.org, NOC Meganet <tec@mega.net.br>,
	Thomas Vogt <thomas@bsdunix.ch>
Subject: Re: PAPI in the ports
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2007/6/22, Stanislav Sedov <stas@freebsd.org>:
>
> On Thu, 14 Jun 2007 13:27:01 +0200
> Thomas Vogt <thomas@bsdunix.ch> mentioned:
>
> >
> > Yes you're right. But to have a such feature on a production system is
> > nice if you have to debug issues.  If I get a problem I can easily debug
> > it without to simulate everything in the lab. It's not that I want to
> > run such features 24/7.
> >
> > But perhaps "options HWPMC_HOOKS" in the kernel enables some hooks which
> > could cause performance penalties even if I don't actively use such
> > feature very often. Like many other debug options in the kernel. I don't
> >  know.
> >
>
> I'm using "options HWPMC_HOOKS" on heavily loaded web server almost
> constantly, no visible penalty at all. Just my 2 cents.


Those are good news! :)


--
> Stanislav Sedov
> ST4096-RIPE
>
>


-- 
_________________________________________________________________
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...