From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37259) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UkVMD-0006sB-Bw for qemu-devel@nongnu.org; Thu, 06 Jun 2013 04:15:50 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UkVM5-00064I-Ac for qemu-devel@nongnu.org; Thu, 06 Jun 2013 04:15:41 -0400 Date: Thu, 6 Jun 2013 17:41:35 +1000 From: David Gibson Message-ID: <20130606074135.GC24421@voom.bne.redhat.com> References: <1370417998-7061-1-git-send-email-aik@ozlabs.ru> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="NU0Ex4SbNnrxsi6C" Content-Disposition: inline In-Reply-To: <1370417998-7061-1-git-send-email-aik@ozlabs.ru> Subject: Re: [Qemu-devel] [PATCH] pseries: Support for in-kernel XICS interrupt controller List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Alexey Kardashevskiy Cc: qemu-ppc@nongnu.org, qemu-devel@nongnu.org, Alexander Graf --NU0Ex4SbNnrxsi6C Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Jun 05, 2013 at 05:39:58PM +1000, Alexey Kardashevskiy wrote: > From: David Gibson >=20 > Recent (host) kernels support emulating the PAPR defined "XICS" interrupt > controller system within KVM. This patch allows qemu to initialize and > configure the in-kernel XICS, and keep its state in sync with qemu's XICS > state as necessary. >=20 > This should give considerable performance improvements. e.g. on a simple > IPI ping-pong test between hardware threads, using qemu XICS gives us > around 5,000 irqs/second, whereas the in-kernel XICS gives us around > 70,000 irqs/s on the same hardware configuration. >=20 > [Mike Qiu : fixed mistype which caused ics_se= t_kvm_state() to fail] > Signed-off-by: David Gibson > Signed-off-by: Alexey Kardashevskiy I think this one also needs the headers update for qemu first, yes? --=20 David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson --NU0Ex4SbNnrxsi6C Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.13 (GNU/Linux) iEYEARECAAYFAlGwPS8ACgkQaILKxv3ab8Z8gACgh++tVdXXgiTRa1dEgWhmGwSM xlAAnjHP0p4RMehNgK6eLb+APMHLuiwu =PM3j -----END PGP SIGNATURE----- --NU0Ex4SbNnrxsi6C--