From mboxrd@z Thu Jan 1 00:00:00 1970 From: dexen deVries To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net> Date: Mon, 5 Sep 2011 08:27:35 +0200 User-Agent: KMail/1.13.6 (Linux/3.1.0-rc2-l37+; KDE/4.5.5; x86_64; ; ) References: In-Reply-To: MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <201109050827.35623.dexen.devries@gmail.com> Subject: Re: [9fans] high precision timings Topicbox-Message-UUID: 19a70b90-ead7-11e9-9d60-3106f5b1d025 On Monday 05 of September 2011 06:42:35 ron minnich 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. =46WIW, Pentium M had `broken' TSC behavior. during boot, linux complains, = ``TSC=20 halts in idle'' and refuses to use it as clock source. apparently TSC count= s=20 actual CPU clock impulses, and those are slowed down in idle. =2D-=20 dexen deVries [[[=E2=86=93][=E2=86=92]]] =46or example, if the first thing in the file is: an XML parser will recognize that the document is stored in the traditional= =20 ROT13 encoding. (( Joe English, http://www.flightlab.com/~joe/sgml/faq-not.txt ))