Re: [Gems-users] Page Fault in Ruby


Date: Mon, 05 Jun 2006 09:01:33 -0500
From: Dan Gibson <degibson@xxxxxxxx>
Subject: Re: [Gems-users] Page Fault in Ruby
Hi Mrinmoy,

Would you be referring to page faults on the host machine, or page faults on the target machine?

For the former:
Ruby queries its host machine when stats are dumped for the number of page faults encoutered during simulation, but it is not "aware" of a page fault on its host as it occurs.

For the latter:
Ruby is not directly aware of paging activity on its target. Since paging is a system-level phenomenon, you might be able to caputre paging with a Simics hap callback (see the Simics Reference Manual and the Simics Programming Guide for details), or possibly by observing the dynamic instruction stream and signaling when a parcicular physical PC is reached.

Regards,
Dan Gibson

Mrinmoy Ghosh wrote:

Hi,
I was interested to know, if ruby memory module signals Page Faults, and if yes, some pointers in the code as to how or where this is done.

Mrinmoy

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