From: Paolo Bonzini <pbonzini@redhat.com>
To: Andrey Korolyov <andrey@xdel.ru>, Alexey <alukardd@alukardd.org>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] poor virtio-scsi performance
Date: Mon, 08 Jun 2015 15:46:16 +0200 [thread overview]
Message-ID: <55759CA8.4070909@redhat.com> (raw)
In-Reply-To: <CABYiri_LbFB2iSxbVWaLPULbY5_XsTts1eiSAgHxhVMR6iTTFA@mail.gmail.com>
On 08/06/2015 15:10, Andrey Korolyov wrote:
>
> You are probably hitting the (more or less fundamental) ceiling which
> was the reason for introducing dataplane backend recently, in other
> words, it does not matter how fast your backend is, the operation
> number will be limited by 50..100kIOPS without dataplane. As far as I
> remember the recent development made possible using it with
> virtio-scsi as well as with virtio-blk, so you`d possibly want to try
> it.
virtio-scsi dataplane is not yet 100% thread-safe, but in practice it
should work in 2.3+. It's definitely good enough for benchmarking.
Paolo
next prev parent reply other threads:[~2015-06-08 13:46 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-08 9:52 [Qemu-devel] poor virtio-scsi performance Alexey
2015-06-08 13:10 ` Andrey Korolyov
2015-06-08 13:46 ` Paolo Bonzini [this message]
2015-06-08 14:00 ` Vasiliy Tolstov
2015-06-08 14:01 ` Paolo Bonzini
2015-06-08 13:51 ` Vasiliy Tolstov
-- strict thread matches above, loose matches on Subject: below --
2015-06-08 10:13 Alexey
2015-06-08 10:30 Vasiliy Tolstov
2015-06-08 12:50 ` Alexandre DERUMIER
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