From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Mosberger Date: Tue, 25 Jan 2005 19:51:46 +0000 Subject: RE: optimize __gp location Message-Id: <16886.41810.141106.857004@napali.hpl.hp.com> 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 Tue, 25 Jan 2005 11:44:34 -0800, "Chen, Kenneth W" said: Ken> I don't have any benchmark result off hand. But digging through recent Ken> data, for a well known db benchmark, GOT table access account to about Ken> 4% of total memory latency in the kernel. 4% actual CPU stalls or 4% of potentially overlapped stalls? I'm not trying to be difficult. It's just that GOT optimizations so far haven't really paid off in any significant way in the benchmarks I tried. You'd think for some benchmarks it does make a significant difference (even just based on a cache-pollution argument), I just haven't seen it yet... --david