From mboxrd@z Thu Jan 1 00:00:00 1970 From: Boszormenyi Zoltan Subject: Re: DPM on Radeon HD6570 Date: Wed, 21 Aug 2013 19:49:53 +0200 Message-ID: <5214FDC1.8010400@pr.hu> References: <5214CF45.40407@pr.hu> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1"; Format="flowed" Content-Transfer-Encoding: quoted-printable Return-path: Received: from mail.cybertec.at (unknown [87.118.86.135]) by gabe.freedesktop.org (Postfix) with ESMTP id 8E139E5EEB for ; Wed, 21 Aug 2013 10:50:06 -0700 (PDT) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org Errors-To: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org To: Alex Deucher Cc: Maling list - DRI developers List-Id: dri-devel@lists.freedesktop.org Hi, thanks for your response. 2013-08-21 17:39 keltez=E9ssel, Alex Deucher =EDrta: > On Wed, Aug 21, 2013 at 10:31 AM, Boszormenyi Zoltan wrot= e: >> Hi, >> >> I read this Phoronix article: >> http://www.phoronix.com/scan.php?page=3Darticle&item=3Damd_hd6000_dpm&nu= m=3D1 >> >> Congrats to the progress achieved so far. >> >> However, I can see an interesting deviation for HD6570 from the >> observed trend of other chips. >> >> r600g can reach 80+ percent of the performance of Catalyst >> for most HD6xxx chips except for 6570, where the performance >> is around 10-20 percent. >> >> Do you have a theory about this difference? >> Maybe DPM doesn't work as intended on HD6570? >> > Are you seeing the same results on your board? If so are the results > roughly the same with dpm enabled vs. disabled? If so I doubt there > is a problem with dpm. On older dGPUs like this one dpm won't really > improve performance since the cards come up with relatively high > clocks by default. It's mainly for saving power when the GPU is idle. I have enabled dpm: $ cat /proc/cmdline BOOT_IMAGE=3D/vmlinuz-3.11.0-0.rc6.git0.1.fc20.x86_64 = root=3DUUID=3D00df37a2-be3d-46fe-963a-ca08977fc5f6 ro quiet rhgb radeon.aud= io=3D1 radeon.dpm=3D1 = LANG=3Dhu_HU.UTF-8 I have just tried "openarena 0.8.5" again with forced "low" performance. Results is 26.87fps with low performance, 59.40-59.70fps with forced high performance. > >> I have this kind of video card, so I wanted to test it myself. >> The exact model of my card is: >> http://www.sapphiretech.com/presentation/product/?cid=3D1&gid=3D3&sgid= =3D1087&pid=3D1176&psn=3D&lid=3D1&leg=3D0# >> > Note that a lot of 6570 cards, including yours use DD3 memory rather > than GDDR5 so they will have fairly limited memory bandwidth. I know. The 6570 tested by Phoronix must be GDDR5 but it's not mentioned specifically. Best regards, Zolt=E1n B=F6sz=F6rm=E9nyi > > Alex > >> I have installed kernel 3.11-rc6 on Fedora 19 using this koji kernel: >> http://koji.fedoraproject.org/koji/buildinfo?buildID=3D457463 >> >> I haven't tested Catalyst but my r600g results mostly match >> the ones in the article even with a different CPU. >> >> Best regards, >> Zolt=E1n B=F6sz=F6rm=E9nyi >> >> _______________________________________________ >> dri-devel mailing list >> dri-devel@lists.freedesktop.org >> http://lists.freedesktop.org/mailman/listinfo/dri-devel