From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marek Marczykowski Subject: Re: Noticeably poor Intel GPU performance on 3.3 and 3.4 dom0 kernels Date: Wed, 30 May 2012 16:57:00 +0200 Message-ID: <4FC6353C.3090908@invisiblethingslab.com> References: <4FC5F2EF.7000004@invisiblethingslab.com> <20120530142830.GE3207@phenom.dumpdata.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============5557073733109754333==" Return-path: In-Reply-To: <20120530142830.GE3207@phenom.dumpdata.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Konrad Rzeszutek Wilk Cc: "xen-devel@lists.xensource.com" , Joanna Rutkowska List-Id: xen-devel@lists.xenproject.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --===============5557073733109754333== Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig8012CDDED16C47ED256AF1B1" This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig8012CDDED16C47ED256AF1B1 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 30.05.2012 16:28, Konrad Rzeszutek Wilk wrote: > On Wed, May 30, 2012 at 12:14:07PM +0200, Joanna Rutkowska wrote: >> Hello, >> >> I've recently been some newer Dom0 kernels (3.3.5, 3.4) under Xen 4.1.= 2, >> and have noticed that those kernel noticeably downgrade performance of= >> (at least) Intel GPUs. This is easily noticeable even on such trivial >> tasks as scrolling a webpage in Firefox or Chrome. This slow GPU >> performance on 3.3 and 3.4 kernels is in stark contrast with what I se= e >> on 3.2.7 Dom0 kernel, where graphics works just great... >> >> In order to make sure that this is not caused by power management set >> too strictly, I played with xenpm and made sure to set the following: >=20 > And are you building with CONFIG_INTEL_IOMMU=3Dy? Yes: CONFIG_GART_IOMMU=3Dy # CONFIG_CALGARY_IOMMU is not set CONFIG_SWIOTLB=3Dy CONFIG_IOMMU_HELPER=3Dy (...) CONFIG_IOMMU_API=3Dy CONFIG_IOMMU_SUPPORT=3Dy CONFIG_AMD_IOMMU=3Dy # CONFIG_AMD_IOMMU_STATS is not set CONFIG_AMD_IOMMU_V2=3Dm CONFIG_DMAR_TABLE=3Dy CONFIG_INTEL_IOMMU=3Dy CONFIG_INTEL_IOMMU_DEFAULT_ON=3Dy CONFIG_INTEL_IOMMU_FLOPPY_WA=3Dy CONFIG_IRQ_REMAP=3Dy >=20 >> 1) xenpm set-scaling-governor performance >> 2) xenpm set-max-cstate 0 >> >> I have verified then that my processor: 1) keeps staying in P0 state >> (so, max frequency), and 2) keeps staying in C0 state. >> >> Those setting didn't change anything regarding the poor graphics >> performance, though. >> >> Any ideas what else I could test to find out the cause of this? >> >> Thanks, >> joanna. >> >=20 >=20 >=20 >> _______________________________________________ >> Xen-devel mailing list >> Xen-devel@lists.xen.org >> http://lists.xen.org/xen-devel >=20 --=20 Best Regards / Pozdrawiam, Marek Marczykowski Invisible Things Lab --------------enig8012CDDED16C47ED256AF1B1 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJPxjU8AAoJENuP0xzK19csPDEH/38fc8MXfzTtiq08N4XfFAu/ qwlPdiCYNvbb/LEkKtSK7hbGN/jQzJXVGvD4K8XfFcjclvC+by9Pa2+itc+dAz8G PDDpGnmOXAeOOn86PFG3XOjbaEDAOvWJMIjhMjjz6u+YdM4akE12d0h4vJb4zilK E5NLYnmB/waWiu+uezD0cn1ZWCJA8zMV9rBCnojuK+CpPJS6KeUCvmUT5PmqYMSR r136wJQF4taQV1heTIZQ1aW8KV9OBpgmGHlxAJfcrdFku0DI828JUcty52qg83Cf 4FNbXh/Kh4Rvl20GMP6TiOmQr19KpiHxCdaqCfXL/Gasjb24Seh6vEDpZKclkzM= =ub3q -----END PGP SIGNATURE----- --------------enig8012CDDED16C47ED256AF1B1-- --===============5557073733109754333== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel --===============5557073733109754333==--