Il 19/09/2014 07:53, Fam Zheng ha scritto:
Any ideas?
The obvious, but hardish one is to switch to epoll (one epoll fd per
AioContext, plus one for iohandler.c).
This would require converting iohandler.c to a GSource.
Paolo
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On Tue, 09/02 12:06, Amit Shah wrote:
On (Mon) 01 Sep 2014 [20:52:46], Zhang Haoyu wrote:
Hi, all
I start a VM with virtio-serial (default ports number: 31), and found
that virtio-blk performance degradation happened, about 25%, this
problem can be reproduced 100%.
without
On (Mon) 01 Sep 2014 [20:52:46], Zhang Haoyu wrote:
Hi, all
I start a VM with virtio-serial (default ports number: 31), and found
that virtio-blk performance degradation happened, about 25%, this problem
can be reproduced 100%.
without virtio-serial:
4k-read-random 1186 IOPS
On Tue, Sep 2, 2014 at 10:36 AM, Amit Shah amit.s...@redhat.com wrote:
On (Mon) 01 Sep 2014 [20:52:46], Zhang Haoyu wrote:
Hi, all
I start a VM with virtio-serial (default ports number: 31), and found
that virtio-blk performance degradation happened, about 25%, this
problem can be
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
On Tue, Sep 2, 2014 at 10:11 PM, Amit Shah amit.s...@redhat.com wrote:
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
Hi, all
I start a VM with virtio-serial (default ports number: 31), and found that
virtio-blk performance degradation happened, about 25%, this problem can be
reproduced 100%.
without virtio-serial:
4k-read-random 1186 IOPS
with virtio-serial:
4k-read-random 871 IOPS
but if use
On (Mon) 01 Sep 2014 [20:38:20], Zhang Haoyu wrote:
Hi, all
I start a VM with virtio-serial (default ports number: 31), and found that
virtio-blk performance degradation happened, about 25%, this problem can
be reproduced 100%.
without virtio-serial:
4k-read-random 1186 IOPS
Hi, all
I start a VM with virtio-serial (default ports number: 31), and found that
virtio-blk performance degradation happened, about 25%, this problem can be
reproduced 100%.
without virtio-serial:
4k-read-random 1186 IOPS
with virtio-serial:
4k-read-random 871 IOPS
but if use
On 01/09/14 14:52, Zhang Haoyu wrote:
Hi, all
I start a VM with virtio-serial (default ports number: 31), and found that
virtio-blk performance degradation happened, about 25%, this problem can
be reproduced 100%.
without virtio-serial:
4k-read-random 1186 IOPS
with virtio-serial:
Il 01/09/2014 15:09, Christian Borntraeger ha scritto:
This is just wild guessing:
If virtio-blk and virtio-serial share an IRQ, the guest operating system has
to check each virtqueue for activity. Maybe there is some inefficiency doing
that.
AFAIK virtio-serial registers 64 virtqueues (on
On 01/09/14 15:12, Paolo Bonzini wrote:
Il 01/09/2014 15:09, Christian Borntraeger ha scritto:
This is just wild guessing:
If virtio-blk and virtio-serial share an IRQ, the guest operating system has
to check each virtqueue for activity. Maybe there is some inefficiency doing
that.
AFAIK
Il 01/09/2014 15:22, Christian Borntraeger ha scritto:
If virtio-blk and virtio-serial share an IRQ, the guest operating system
has to check each virtqueue for activity. Maybe there is some
inefficiency doing that.
AFAIK virtio-serial registers 64 virtqueues (on 31 ports + console)
On 01/09/14 15:29, Paolo Bonzini wrote:
Il 01/09/2014 15:22, Christian Borntraeger ha scritto:
If virtio-blk and virtio-serial share an IRQ, the guest operating system
has to check each virtqueue for activity. Maybe there is some inefficiency
doing that.
AFAIK virtio-serial registers 64
On 01/09/14 16:03, Christian Borntraeger wrote:
On 01/09/14 15:29, Paolo Bonzini wrote:
Il 01/09/2014 15:22, Christian Borntraeger ha scritto:
If virtio-blk and virtio-serial share an IRQ, the guest operating system
has to check each virtqueue for activity. Maybe there is some
inefficiency
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