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From: Stefan Priebe <s.priebe@profihost.ag>
To: qemu-devel <qemu-devel@nongnu.org>
Subject: [Qemu-devel] slow speed for virtio-scsi since qemu 2.2
Date: Sun, 15 Feb 2015 19:46:12 +0100	[thread overview]
Message-ID: <54E0E974.4010301@profihost.ag> (raw)

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

             reply	other threads:[~2015-02-15 18:46 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-02-15 18:46 Stefan Priebe [this message]
2015-02-16 11:06 ` [Qemu-devel] slow speed for virtio-scsi since qemu 2.2 Alexandre DERUMIER
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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