From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.saout.de ([127.0.0.1]) by localhost (mail.saout.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 4Nv83MDK-pVd for ; Wed, 8 Aug 2012 16:45:09 +0200 (CEST) Received: from plane.gmane.org (plane.gmane.org [80.91.229.3]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.saout.de (Postfix) with ESMTPS for ; Wed, 8 Aug 2012 16:45:08 +0200 (CEST) Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1Sz7VS-0001XM-IL for dm-crypt@saout.de; Wed, 08 Aug 2012 16:45:06 +0200 Received: from d67-193-214-242.home3.cgocable.net ([67.193.214.242]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 08 Aug 2012 16:45:06 +0200 Received: from brian by d67-193-214-242.home3.cgocable.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 08 Aug 2012 16:45:06 +0200 From: "Brian J. Murrell" Date: Wed, 08 Aug 2012 10:29:01 -0400 Message-ID: Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig0AE8EA72AC30ECB121A16291" Subject: [dm-crypt] dm-crypt multithreaded yet? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: dm-crypt@saout.de This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig0AE8EA72AC30ECB121A16291 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi all. Sorry for what is probably a very tiresome topic here, but just trying to find out what the current status is... I thought I knew the answer to this question (dm-crypt multithreaded yet? no) but I had read in several places that dm-crypt had gained multithreaded capabilities. I'm still skeptical though. I certainly don't see it on Fedora 17's 3.3.4-5.fc17.x86_64 kernel. Sadly, I don't have an AES-NI capable CPU, but I do have 4 (real, 8 with HT enabled) cores and dm-crypting on my SSD reduces its performance down from about 260MB/s (native) to 95MB/s. :-( I would like to think I could get more performance out of it if more of the (usually available anyway) CPU could be thrown at it. Is this something being worked on currently? I have taken note of http://people.redhat.com/mpatocka/patches/kernel/dm-crypt-paralelizace/cu= rrent/ but that work seems to be going back to Feb/2012. And TBH, I'm not entirely clear if that work is aimed at multi-threaded dm-crypt or not. Cheers, b. --------------enig0AE8EA72AC30ECB121A16291 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAlAid60ACgkQl3EQlGLyuXAgtgCg2M+0TFVregsKGkIQvW00fzT/ ccoAnicm+Wg3oZ3YKG3Jbbb0dlVKAqVB =/ZlB -----END PGP SIGNATURE----- --------------enig0AE8EA72AC30ECB121A16291--