From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([209.51.188.92]:33842) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hAuZt-0005MM-DG for qemu-devel@nongnu.org; Mon, 01 Apr 2019 06:54:10 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hAuZs-00043H-Hx for qemu-devel@nongnu.org; Mon, 01 Apr 2019 06:54:09 -0400 Received: from mail-wm1-x342.google.com ([2a00:1450:4864:20::342]:53663) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1hAuZs-00042h-7b for qemu-devel@nongnu.org; Mon, 01 Apr 2019 06:54:08 -0400 Received: by mail-wm1-x342.google.com with SMTP id q16so9875824wmj.3 for ; Mon, 01 Apr 2019 03:54:07 -0700 (PDT) Date: Mon, 1 Apr 2019 10:07:24 +0100 From: Stefan Hajnoczi Message-ID: <20190401090724.GA643@stefanha-x1.localdomain> References: <5FF901C1-0AA5-4308-A65C-C448D0A2BA63@oracle.com> <20190305172905.GD13806@stefanha-x1.localdomain> <2D7F11D0-4A02-4A0F-961D-854240376B17@oracle.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="ZPt4rx8FFjLCG7dd" Content-Disposition: inline In-Reply-To: <2D7F11D0-4A02-4A0F-961D-854240376B17@oracle.com> Subject: Re: [Qemu-devel] Following up questions related to QEMU and I/O Thread List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Wei Li Cc: Stefan Hajnoczi , Paolo Bonzini , qemu-devel@nongnu.org --ZPt4rx8FFjLCG7dd Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Mar 29, 2019 at 08:16:36AM -0700, Wei Li wrote: > Thanks Stefan for your reply and guidance! >=20 > We spent some time on exploring the multiple I/O Threads approach per you= r feedback. Based on the perf measurement data, we did see some IOPS improv= ement for multiple volumes, which is great. :) >=20 > In addition, IOPS for single Volume will still be a bottleneck, it seems = like multiqueue block layer feature which Paolo is working on may be able t= o help improving the IOPS for single volume. >=20 > @Paolo, @Stefan,=20 > Would you mind sharing the multiqueue feature code branch with us? So tha= t we could get some rough idea about this feature and maybe start doing som= e exploration?=20 Paolo last worked on this code, so he may be able to send you a link. Stefan --ZPt4rx8FFjLCG7dd Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEcBAEBAgAGBQJcodTMAAoJEJykq7OBq3PI9E4H/jxWgrKtvSl0eqCWSf5Ge5Nv n5+P0r/Xe44nyiP70gk43IQHtr12HYPx2VakqHIPtPiVDiSCaUnl1SP/GuMeSjr0 KkHdJB8Us1Enem1eirRMukWkE3QH5Mpc/ZQbTJBuppQ5iu6GJxTXIBJDGhKrOiq2 k/d3qZqiwCfu5V/MozvYoShe6s+xWnzBoUgf4K2LfjaPdBKvRUEuyoSC+iC3knjD 7rdCP1zjLWl+X4OCebcudZbJguvmnM45nlQpFHz7xRgsdsPSiQpoy6DYxwEJ/PeG nClD/9SP0b0+OKCz3NkZDUw6E0346hcmOOifYMyzeBksBjPsUbEiKF4TdUmyOZQ= =80a3 -----END PGP SIGNATURE----- --ZPt4rx8FFjLCG7dd--