From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Date: Fri, 10 Sep 2004 07:42:07 +0000 Subject: Re: [PATCH] arch/ia64/sn: SGI Altix hardware performance monitoring API Message-Id: <20040910084207.D21519@infradead.org> List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org On Fri, Sep 10, 2004 at 05:05:31PM +1000, Mark Goodwin wrote: > > The SGI Altix PROM supports a SAL call for performance monitoring and for > exporting NUMA topology. We need this in community kernels for diagnostic > and performance tools to use, especially on very large machines. > > This patch registers a dynamic misc device "sn_hwperf" that supports an > ioctl interface for reading/writing memory mapped registers on Altix > nodes and routers via the new SAL call. It also creates a read-only > procfs file "/proc/sgi_sn/sn_topology" to export NUMA topology and Altix > hardware inventory. > > Any review/comments most welcome .. thanks What tools are using this? Might be worse to put an url to the source package into the Kconfig entry.