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 tUAE5xT1H2PA for ; Mon, 23 Jul 2012 13:09:47 +0200 (CEST) Received: from molly.corsac.net (molly.corsac.net [IPv6:2002:4ec0:442e::1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.saout.de (Postfix) with ESMTPS for ; Mon, 23 Jul 2012 13:09:46 +0200 (CEST) Message-ID: <1343041780.26887.19.camel@scapa> From: Yves-Alexis Perez Date: Mon, 23 Jul 2012 13:09:40 +0200 In-Reply-To: <500D2B8E.3000908@redhat.com> References: <20120722190757.GB10089@merlins.org> <20120722202213.GA7306@fancy-poultry.org> <20120722190757.GB10089@merlins.org> <1342986452.26887.3.camel@scapa> <20120722203929.GB3925@merlins.org> <20120722214757.GA16793@tansi.org> <20120723062850.GA6931@merlins.org> <20120723081407.GA872@tansi.org> <500D2B8E.3000908@redhat.com> Content-Type: multipart/signed; micalg="pgp-sha256"; protocol="application/pgp-signature"; boundary="=-r83S9kvsdrftAwCF8bn3" Mime-Version: 1.0 Subject: Re: [dm-crypt] aes-xts-plain with aes_x86_64 makes my SSD 5x slower than my encrypted HD List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Milan Broz Cc: dm-crypt@saout.de, Marc MERLIN --=-r83S9kvsdrftAwCF8bn3 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On lun., 2012-07-23 at 12:46 +0200, Milan Broz wrote: > So no wonder that you get slow operation - in dd/hdparm usually only > one cpu is processing the request. If CPU is fast enough, no problem. > If not you will see slowdown. AES-NI will speed up this on that cpu > core, > but will not help run request in parallel on multi-core systems. Then I should see slow operations too, since I'm doing exactly the same test. My guess is that is a kernel issue somewhere, but maybe we should try a common ground (say, a grml live or some fedora live) and report back? Regards, --=20 Yves-Alexis --=-r83S9kvsdrftAwCF8bn3 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAABCAAGBQJQDTD0AAoJEDBVD3hx7wuolj0P/iqJgKAPAVvP9K+xA4yOkxxy nQjkvG1uoFefyLVp+AkZd7oduPgo+ZpzOyp4ynyy7QIcRJawCbC8skaWroEz90dx LzSkPKeJBeBCOFm9qCZ1oczJWTAXMXhyvI3udCof9ICRRer6vjzBelGAjlo66zXD nsevHqwmZFtXYcN/MPf/7C1JfjjeBGL8tF2hbu4y33YK91TS86Jn7luFF2w6N07T 7EtPKt/x+XKDTLyH+o+xLwACK8a9ofaGqTcoJYo9zxvU4InucKRR7SwIxxxZu+rr QAQg6XYZVV7rgsI/zL5Ye+WTAUv7OG9cK5wlNzTABfrDvjN3PoI4f3/s1sALcWu5 EPkfBiq/aoaon/RARvHDbuETgJH6HmxapIPj48u56rHuB98/ZruWx8Rf7NEBqiJa QFbrP3jdSiT59kTPsDbcAEVwogC+oc5KnTw9ba5ZOQr57TodyHVlg4vzUDpJ9pcv DKhiQse5spL47ZAuXHD+N92TUl4N+NL/hNSL1HnViXSwZWakNs3nZ9odPzLgDST3 f9Az6VDXLFwZ+nTYev4VNzFOt0fOyBU3x7BeCXTksZj4gGhPuZa1FWHQ9GEprZpc LncnW16HhY9b+NwtvyQ77mNr8jTEQl4nwBzLpDZe4Eac02t0P++/LEMEBcQCr//7 Ju5hKWyxqbwFWNEx+o9g =L9gK -----END PGP SIGNATURE----- --=-r83S9kvsdrftAwCF8bn3--