From mboxrd@z Thu Jan 1 00:00:00 1970 From: erik quanstrom Date: Mon, 5 Sep 2011 00:48:41 -0400 To: 9fans@9fans.net Message-ID: In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Subject: Re: [9fans] high precision timings Topicbox-Message-UUID: 197cbf8e-ead7-11e9-9d60-3106f5b1d025 On Mon Sep 5 00:43:49 EDT 2011, rminnich@gmail.com wrote: > The TSC has been badly abused by the chip makers over the last ten > years. It went through a period of time where it had poor accuracy. Be > sure to look at your hardware and make sure it's a later chip which > will give you reasonable TSC behavior. my example code wires the proc to a mach to avoid extreme TSC problems such as on some ht p4 machines. perhaps that's a bit extreme. it's been a long time since i've used a machine with a broken cycle counter. (last purchase: 2006.) - erik