From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1G5RRs-0006qk-UJ for qemu-devel@nongnu.org; Tue, 25 Jul 2006 14:16:04 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1G5RRr-0006pi-Dv for qemu-devel@nongnu.org; Tue, 25 Jul 2006 14:16:04 -0400 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1G5RRr-0006pf-9x for qemu-devel@nongnu.org; Tue, 25 Jul 2006 14:16:03 -0400 Received: from [80.91.229.2] (helo=ciao.gmane.org) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA:32) (Exim 4.52) id 1G5RTD-0000Iq-LN for qemu-devel@nongnu.org; Tue, 25 Jul 2006 14:17:28 -0400 Received: from list by ciao.gmane.org with local (Exim 4.43) id 1G5RRh-0004TC-P6 for qemu-devel@nongnu.org; Tue, 25 Jul 2006 20:15:53 +0200 Received: from dslb-084-061-145-117.pools.arcor-ip.net ([84.61.145.117]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 25 Jul 2006 20:15:53 +0200 Received: from skoehler by dslb-084-061-145-117.pools.arcor-ip.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 25 Jul 2006 20:15:53 +0200 From: =?ISO-8859-1?Q?Sven_K=F6hler?= Date: Tue, 25 Jul 2006 20:15:40 +0200 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigE72EB4BEBE9CD753427C2ABE" In-Reply-To: Sender: news Subject: [Qemu-devel] Re: high CPU load / async IO? Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigE72EB4BEBE9CD753427C2ABE Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable >>> IDE only supports one outstanding request, so having a thread that ru= ns >>> the synchronous block routines appears reasonable. However, SATA and= SCSI >>> both support multiple outstanding requests. The extension to the exi= sting >>> patch would be simple--increase the number of threads. >> ??? >> >> Wasn't there another variant using the async-I/O support of the Host O= S >> and thereby supporting a larger number of outstanding requests? >=20 > Not that I know of. Do you have a pointer? Hmm, perhaps i only heard people talking about it ... But if i find anything, i post the link. >>> So the current thread-based async dma patch is really just the wrong = long >>> term solution. A more long term solution is likely in the works. It= >>> requires quite a bit of code modification though. >> >> I see. So in other words: >> >> don't ask for simple async I/O now. The more complex and flexible >> sollution will follow soon. >=20 > Yes, hopefully really soon. So i will wait patiently :-) --------------enigE72EB4BEBE9CD753427C2ABE Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.1 (Cygwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFExl/N7Ww7FjRBE4ARAnQSAJ9qocogKJJe+MW8wcJ7RwoyWFQh9ACfR2Jo znq5gHC9SAgn5ZVayM60Uzo= =v04h -----END PGP SIGNATURE----- --------------enigE72EB4BEBE9CD753427C2ABE--