From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexander Graf Date: Tue, 22 Jun 2010 12:14:18 +0000 Subject: Re: [PATCH 1/2] KVM: PPC: Add generic hpte management functions Message-Id: <4C20A91A.1080607@suse.de> List-Id: References: <1277127841-32704-1-git-send-email-agraf@suse.de> <4C20A64D.2070805@redhat.com> <4C20A6C8.4070002@suse.de> <4C20A795.6040607@redhat.com> <4C20A836.2010908@suse.de> <4C20A890.9040806@redhat.com> In-Reply-To: <4C20A890.9040806@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Avi Kivity Cc: kvm-ppc@vger.kernel.org, kvm@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Avi Kivity wrote: > On 06/22/2010 03:10 PM, Alexander Graf wrote: >> If you have more performance hints, I'll gladly take them :). >> > > Using a cpu that virtualizes the mmu in hardware helps tremendously. > PPC never does that. Even with the virtualization extensions the MMU is still software managed. I was also more thinking of hints like "kmem_cache_zalloc is slow" or so ;). Alex From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx2.suse.de (cantor2.suse.de [195.135.220.15]) by ozlabs.org (Postfix) with ESMTP id 53CDCB6F1C for ; Tue, 22 Jun 2010 22:14:21 +1000 (EST) Message-ID: <4C20A91A.1080607@suse.de> Date: Tue, 22 Jun 2010 14:14:18 +0200 From: Alexander Graf MIME-Version: 1.0 To: Avi Kivity Subject: Re: [PATCH 1/2] KVM: PPC: Add generic hpte management functions References: <1277127841-32704-1-git-send-email-agraf@suse.de> <4C20A64D.2070805@redhat.com> <4C20A6C8.4070002@suse.de> <4C20A795.6040607@redhat.com> <4C20A836.2010908@suse.de> <4C20A890.9040806@redhat.com> In-Reply-To: <4C20A890.9040806@redhat.com> Content-Type: text/plain; charset=ISO-8859-1 Cc: linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, kvm-ppc@vger.kernel.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Avi Kivity wrote: > On 06/22/2010 03:10 PM, Alexander Graf wrote: >> If you have more performance hints, I'll gladly take them :). >> > > Using a cpu that virtualizes the mmu in hardware helps tremendously. > PPC never does that. Even with the virtualization extensions the MMU is still software managed. I was also more thinking of hints like "kmem_cache_zalloc is slow" or so ;). Alex From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexander Graf Subject: Re: [PATCH 1/2] KVM: PPC: Add generic hpte management functions Date: Tue, 22 Jun 2010 14:14:18 +0200 Message-ID: <4C20A91A.1080607@suse.de> References: <1277127841-32704-1-git-send-email-agraf@suse.de> <4C20A64D.2070805@redhat.com> <4C20A6C8.4070002@suse.de> <4C20A795.6040607@redhat.com> <4C20A836.2010908@suse.de> <4C20A890.9040806@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: kvm-ppc@vger.kernel.org, kvm@vger.kernel.org, linuxppc-dev@lists.ozlabs.org To: Avi Kivity Return-path: Received: from cantor2.suse.de ([195.135.220.15]:53451 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753774Ab0FVMOU (ORCPT ); Tue, 22 Jun 2010 08:14:20 -0400 In-Reply-To: <4C20A890.9040806@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: Avi Kivity wrote: > On 06/22/2010 03:10 PM, Alexander Graf wrote: >> If you have more performance hints, I'll gladly take them :). >> > > Using a cpu that virtualizes the mmu in hardware helps tremendously. > PPC never does that. Even with the virtualization extensions the MMU is still software managed. I was also more thinking of hints like "kmem_cache_zalloc is slow" or so ;). Alex