From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Chen, Kenneth W" Date: Fri, 24 Oct 2003 20:36:32 +0000 Subject: RE: Itanium2@900MHz slower than alpha@666MHz ? Message-Id: 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 >> One other neat thing about Itanium architecture is the capability of >> it's performance counter. It has capability to do cycle accounting that >> break-down the number of cycles that are lost due to various kinds of >> micro-architectural events, it is based on CPU's actual stall cycles in >> the pipeline so you can see exactly where the stall is coming from to >> eliminate any guess work. > >Are qprof and pfmon enough to do this ? Yes. >> See electron compiler user's guide for PGO methodology: >> http://www.intel.com/software/products/compilers/c60l/resources/c_ug_lnx >> .pdf > >Is this the same for 7.x ? I think so. - Ken