From: Amit Shah <amit.shah@redhat.com>
To: Andrey Korolyov <andrey@xdel.ru>
Cc: Zhang Haoyu <zhanghy@sangfor.com>,
qemu-devel <qemu-devel@nongnu.org>, kvm <kvm@vger.kernel.org>
Subject: Re: [Qemu-devel] [question] virtio-blk performance degradationhappened with virito-serial
Date: Tue, 2 Sep 2014 23:41:13 +0530 [thread overview]
Message-ID: <20140902181113.GF30168@grmbl.mre> (raw)
In-Reply-To: <CABYiri_7486NH1iuGqxqf_ydNzK=3Fep7qE0bge18+DYjiWqzQ@mail.gmail.com>
On (Tue) 02 Sep 2014 [22:05:45], Andrey Korolyov wrote:
> Can confirm serious degradation comparing to the 1.1 with regular
> serial output - I am able to hang VM forever after some tens of
> seconds after continuously printing dmest to the ttyS0. VM just ate
> all available CPU quota during test and hanged over some tens of
> seconds, not even responding to regular pings and progressively
> raising CPU consumption up to the limit.
Entirely different to what's being discussed here. You're observing
slowdown with ttyS0 in the guest -- the isa-serial device. This
thread is discussing virtio-blk and virtio-serial.
Amit
next prev parent reply other threads:[~2014-09-02 18:11 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-29 7:45 [Qemu-devel] [question] virtio-blk performance degradation happened with virito-serial Zhang Haoyu
2014-08-29 14:38 ` Amit Shah
2014-09-01 12:38 ` [Qemu-devel] [question] virtio-blk performance degradationhappened " Zhang Haoyu
2014-09-01 12:46 ` Amit Shah
2014-09-01 12:57 ` [Qemu-devel] [question] virtio-blk performancedegradationhappened " Zhang Haoyu
2014-09-01 12:52 ` [Qemu-devel] [question] virtio-blk performance degradationhappened " Zhang Haoyu
2014-09-01 13:09 ` Christian Borntraeger
2014-09-01 13:12 ` Paolo Bonzini
2014-09-01 13:22 ` Christian Borntraeger
2014-09-01 13:29 ` Paolo Bonzini
2014-09-01 14:03 ` Christian Borntraeger
2014-09-01 14:15 ` Christian Borntraeger
2014-09-04 7:56 ` [Qemu-devel] [question] virtio-blk performance degradationhappenedwith virito-serial Zhang Haoyu
2014-09-07 9:46 ` Zhang Haoyu
2014-09-11 6:11 ` Amit Shah
2014-09-12 3:21 ` [Qemu-devel] [question] virtio-blk performance degradation happened with virito-serial Zhang Haoyu
2014-09-12 12:38 ` Stefan Hajnoczi
2014-09-13 17:22 ` Max Reitz
2014-09-16 14:59 ` Zhang Haoyu
2014-09-02 6:36 ` [Qemu-devel] [question] virtio-blk performance degradationhappened " Amit Shah
2014-09-02 18:05 ` Andrey Korolyov
2014-09-02 18:11 ` Amit Shah [this message]
2014-09-02 18:27 ` Andrey Korolyov
2014-09-04 2:20 ` [Qemu-devel] [question] virtio-blk performancedegradationhappened " Zhang Haoyu
2014-09-19 5:53 ` [Qemu-devel] [question] virtio-blk performance degradationhappened " Fam Zheng
2014-09-19 13:35 ` Paolo Bonzini
2014-09-22 13:23 ` [Qemu-devel] [question] virtio-blk performancedegradationhappened " Zhang Haoyu
2014-09-23 1:29 ` Fam Zheng
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