From mboxrd@z Thu Jan 1 00:00:00 1970 From: duraid@fl.net.au Date: Wed, 30 Jan 2002 06:46:45 +0000 Subject: Re: [Linux-ia64] What's taking all the system time..? 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 Quoting Stephane Eranian : > Just by curiosity, have you looked at the system log in /var/log/messages? permission denied ;) > I am guessing your program does some floating point operations. > Have you seen something about floating-point software assist? No flops in this code! > Another potential cause could be unaligned accesses. That you can also see > in the system log. 'dmesg' works and sure enough, I get unaligned accesses. But not enough to get *that* sort of a performance hit, surely? To explain what I'm seeing, each unaligned access would have to cost 0.05 seconds or so! Duraid ------------------------------------------------- This mail sent through IMP: http://horde.org/imp/