From: Avi Kivity Date: Wed, 03 Dec 2008 11:32:56 +0000 Subject: Re: [PATCH 0 of 6] PowerPC KVM patches for 2.6.29 Message-Id: <49366E68.4080904@redhat.com> List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Hollis Blanchard Cc: kvm@vger.kernel.org, kvm-ppc@vger.kernel.org Hollis Blanchard wrote: > Hi Avi, here's the latest batch of PowerPC kernel patches. > > The first set dramatically improve performance. Most importantly, we add > support for large host pages with KVM (i.e. PAGE_SHIFT > 12). (Large *guest* > pages have already been supported since day 1, since the guest kernel uses > them for the linear map.) Followup patches further improve performance by > changing how we manage the shadow TLB. > > The last two add some accounting code to easily discover performance > bottlenecks. This is especially important since the 440 core lacks performance > monitoring hardware. > > These patches, in conjunction with 64KB pages on guest and host, get us to 96% > of native performance for compute-bound workloads, which I'm pretty happy > with. See http://kvm.qumranet.com/kvmwiki/PowerPC_Exittimings for more > details (those statistics were gathered using the accounting patches). > > These have been tested pretty thoroughly for several weeks. Please apply for > 2.6.29. Thanks! > Applied all, thanks. I'm not thrilled about the private exit timing statistics gathering, hopefully it can be morphed into the more general framework. -- error compiling committee.c: too many arguments to function