RE: Oprofile and Compaq DCPI Comparison

[Balle, S. <sus...@hp...>]

By compression I mean that DCPI is aggregating data/reducing the amount
of data using the techniques described in the DCPI paper you have a link
to on the oprofile site.

Thanks Susanne

-----Original Message-----
From: John Levon [mailto:mo...@co...] On Behalf Of John Levon
Sent: Monday, August 23, 2004 8:09 PM
To: Balle, Susanne
Cc: opr...@li...
Subject: Re: Oprofile and Compaq DCPI Comparison


On Mon, Aug 23, 2004 at 03:05:38PM -0400, Balle, Susanne wrote:

> Does anybody know of any document that compare the two? How far along=20
> is Oprofile from DCPI? And also what are the missing pieces? Missing=20
> tools?

Offhand (having never actually used DCPI) I do not know of =20
anything serious that we're missing. Perhaps the ability to multiplex
events instead of being restricted by the number of hardware counters.

> Also looking at the sources I am trying to figure out if Oprofile does

> any compression in the driver or in the daemon like DCPI does?

I do not know what you mean by "compression".

> I am also trying to figure out if Oprofile can indeed do continous=20
> profiling for weeks like DCPI can.

That's certainly what my desktop thinks.

regards
john