From: Alexandre DERUMIER <aderumier@odiso.com>
To: Stefan Priebe <s.priebe@profihost.ag>
Cc: qemu-devel <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2
Date: Mon, 16 Feb 2015 12:06:24 +0100 (CET) [thread overview]
Message-ID: <1244767660.920598.1424084784168.JavaMail.zimbra@oxygem.tv> (raw)
In-Reply-To: <54E0E974.4010301@profihost.ag>
H Stefan,
only for write ? or also read ?
I'll try to reproduce on my test cluster.
----- Mail original -----
De: "Stefan Priebe" <s.priebe@profihost.ag>
À: "qemu-devel" <qemu-devel@nongnu.org>
Envoyé: Dimanche 15 Février 2015 19:46:12
Objet: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2
Hi,
while i get a constant random 4k i/o write speed of 20.000 iops with
qemu 2.1.0 or 2.1.3. I get jumping speeds with qemu 2.2 (jumping between
500 iops and 15.000 iop/s).
If i use virtio instead of virtio-scsi speed is the same between 2.2 and
2.1.
Is there a known regression?
Greets,
Stefan
next prev parent reply other threads:[~2015-02-16 11:06 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-15 18:46 [Qemu-devel] slow speed for virtio-scsi since qemu 2.2 Stefan Priebe
2015-02-16 11:06 ` Alexandre DERUMIER [this message]
2015-02-16 12:24 ` Paolo Bonzini
2015-02-16 14:43 ` Stefan Priebe - Profihost AG
2015-02-16 14:44 ` Paolo Bonzini
2015-02-16 14:47 ` Stefan Priebe - Profihost AG
2015-02-16 14:49 ` Paolo Bonzini
2015-02-16 15:41 ` Stefan Priebe - Profihost AG
2015-02-16 15:49 ` Paolo Bonzini
2015-02-16 19:02 ` Stefan Priebe
2015-02-16 15:50 ` Andreas Färber
2015-02-16 19:02 ` Stefan Priebe
2015-02-16 14:58 ` Andrey Korolyov
2015-02-16 15:38 ` Stefan Priebe - Profihost AG
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