From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Chen, Kenneth W" Date: Mon, 19 Sep 2005 06:44:33 +0000 Subject: RE: Volanomark regress on ia64 Message-Id: <200509190644.j8J6iZg01092@unix-os.sc.intel.com> List-Id: References: <200509160040.j8G0eFg06734@unix-os.sc.intel.com> In-Reply-To: <200509160040.j8G0eFg06734@unix-os.sc.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org Nick Piggin wrote on Sunday, September 18, 2005 3:57 AM > It looks like the problem is confined to ia64? Are the x86-64 machines > also running with HZ set to 250? Yes, it appears to be confined to ia64. X86-64 machines are running at 250 Hz and there is no perf. regression there. > I would look at differences between SD_CPU_INIT for ia64 versus the > generic definition. cache_hot_time and cache_nice_tries by the looks, > both those could cause increased idle time. Thanks for the suggestion. My first experiment was in those area as well, in particular changing newidle_idx and idle_idx. I have not yet come up any concrete resolution. - Ken