From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <46434561.2090309@domain.hid> Date: Thu, 10 May 2007 18:16:33 +0200 From: Jan Kiszka MIME-Version: 1.0 References: <20070510120938.307800@domain.hid> In-Reply-To: <20070510120938.307800@domain.hid> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigF4B2F23906A8D38C61D0EBD5" Sender: jan.kiszka@domain.hid Subject: Re: [Xenomai-help] high latency with Intel Core 2 Duo List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Karl Reichert Cc: xenomai@xenomai.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigF4B2F23906A8D38C61D0EBD5 Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: quoted-printable Karl Reichert wrote: > Hello, >=20 > I'm using an Intel Core 2 Duo at work and an AMD XP3000+ at home. I in= stalled Xenomai 2.3.1 with nearly same configuration at both and run the = xeno-test. I get 10 times higher latency with Core 2 Duo. How is it possi= ble? May the SMP be the reason? SMP surely increases latencies (more synchronisation overhead), but the tests you ran were also far to short for a thorough comparison. 2 us worst-case is far too good, even on high end. Also 20 us on loaded SMP boxes may not hold. Leave the test running for a longer period ("-T" parameter, I think). Jan --------------enigF4B2F23906A8D38C61D0EBD5 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFGQ0VhniDOoMHTA+kRAvuZAJ0d7Ad4bN+N/OF46aQbh2xpmKqAKgCfSqAb h6+hnn9Ik0UTfX9CJ8wycac= =9XW3 -----END PGP SIGNATURE----- --------------enigF4B2F23906A8D38C61D0EBD5--