From mboxrd@z Thu Jan 1 00:00:00 1970 From: Valdis.Kletnieks@vt.edu Subject: Re: loaded router, excessive getnstimeofday in oprofile Date: Sun, 31 Aug 2008 22:39:16 -0400 Message-ID: <20031.1220236756@turing-police.cc.vt.edu> References: <21915755.1327801219904892242.JavaMail.root@ouachita> <48B6E7D0.5070307@hp.com> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1220236756_12805P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Cc: Joe Malicki , David Miller , andi@firstfloor.org, johnpol@2ka.mipt.ru, dada1@cosmosbay.com, denys@visp.net.lb, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, juhlenko@akamai.com, sammy@sammy.net To: Rick Jones Return-path: Received: from turing-police.cc.vt.edu ([128.173.14.107]:36846 "EHLO turing-police.cc.vt.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750871AbYIACjp (ORCPT ); Sun, 31 Aug 2008 22:39:45 -0400 In-Reply-To: Your message of "Thu, 28 Aug 2008 11:00:48 PDT." <48B6E7D0.5070307@hp.com> Sender: netdev-owner@vger.kernel.org List-ID: --==_Exmh_1220236756_12805P Content-Type: text/plain; charset=us-ascii On Thu, 28 Aug 2008 11:00:48 PDT, Rick Jones said: > Earlier in the thread mention was made of financial services types. If > someone has knowledge of the (probably) arcane rules under which they > must operate it would be great to hear more. Does some entity like the > SEC (Securities and Exchange Commission in the United States) mandate > some sort of timestamp for when the trading request "arrives at the > trading system" and do they define that "arriving at the trading system" > means? As a totally pragmatic point - if the market is in such free-fall that it matters that your order got in a 10 thousandth of a second after somebody else's, instead of before, you probably lost at least 5 to 10 times as much during the time it took somebody to type the damn order in and hit enter. At that point, you have *bigger* things to worry about. --==_Exmh_1220236756_12805P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iD8DBQFIu1XUcC3lWbTT17ARAohOAKCh5/m7M6Tr92hp8Tm74aHeHWmiJgCdG3lM kL9+I5B07pACfQ6+SbpUrrc= =BYQm -----END PGP SIGNATURE----- --==_Exmh_1220236756_12805P--