From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gregory Haskins Subject: Re: [PATCH 4/5] KVM: Add hypercall queue for paravirt_ops implementation Date: Mon, 18 Jun 2007 09:25:37 -0400 Message-ID: <1182173137.4593.45.camel@ghaskins-t60p.haskins.net> References: <4675F462.1010708@codemonkey.ws> <4675F568.90608@codemonkey.ws> <46764B47.5060403@qumranet.com> <46767D47.1010104@codemonkey.ws> <46767F98.70109@qumranet.com> <1182171781.4593.38.camel@ghaskins-t60p.haskins.net> <4676867E.1090208@codemonkey.ws> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4676867E.1090208-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org To: Anthony Liguori Cc: kvm-devel , virtualization List-Id: virtualization@lists.linuxfoundation.org On Mon, 2007-06-18 at 08:19 -0500, Anthony Liguori wrote: > Gregory Haskins wrote: > > On Mon, 2007-06-18 at 15:50 +0300, Avi Kivity wrote: > > > > > >> These numbers are pretty bad. I'd like to improve them, even without PV. > >> > >> > > > > There's a 20% speedup just waiting to be checked in in the lapic > > branch ;) > > > > (This gain was observed using "make mrproper; make defconfig; time make" > > on Intel with a non-PV 2.6.21 guest when the lapic code was enabled). > > > > So what was the final number you were seeing? Were you seeing only 25% > below native to start with? If memory serves me correctly, I was getting 9m30s pre-patch, and 7m55s post-patch. This translates (I believe) to approximately 19.5% improvement. I didn't measure against native. -Greg ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/