From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sasha Levin Subject: Re: kvm tools: clock sources for hrtimer Date: Wed, 09 Nov 2011 17:49:53 +0200 Message-ID: <1320853793.31056.75.camel@lappy> References: <737697ff491a47a25b620f0fca60bb07@radon2.swed.at> <1320850191.31056.64.camel@lappy> <294867a39da5124eee9a2c167f0f9c87@radon2.swed.at> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: penberg@cs.helsinki.fi, kvm@vger.kernel.org, mingo@elte.hu, asias.hejun@gmail.com, gorcunov@gmail.com To: Richard Weinberger Return-path: Received: from mail-fx0-f46.google.com ([209.85.161.46]:59547 "EHLO mail-fx0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750783Ab1KIPvp (ORCPT ); Wed, 9 Nov 2011 10:51:45 -0500 Received: by faan17 with SMTP id n17so1767411faa.19 for ; Wed, 09 Nov 2011 07:51:44 -0800 (PST) In-Reply-To: <294867a39da5124eee9a2c167f0f9c87@radon2.swed.at> Sender: kvm-owner@vger.kernel.org List-ID: On Wed, 2011-11-09 at 17:42 +0200, Richard Weinberger wrote: > On Wed, 09 Nov 2011 16:49:51 +0200, Sasha Levin > wrote: > > We'll do kvm_clock as well if you compile it in the kernel. > > CONFIG_HIGH_RES_TIMERS is on both host and guest kernels enabled. > BTW: Why adds the kvm tool "notsc" to the guest's kernel command line? You'll need CONFIG_KVM_CLOCK. I'm not actually sure how close our implementation is to having tsc working so far, Cyrill knows more about that than me. > > I don't think that using a non-pv clocksource in a guest will do you > > much good either. > > Using qemu-kvm I get pretty good results... > > Thanks, > //richard -- Sasha.