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Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2 |
Date: |
Wed, 2 Jul 2014 12:38:45 -0400 (EDT) |
> On Thu, Jul 3, 2014 at 12:23 AM, Paolo Bonzini <address@hidden> wrote:
> > Il 02/07/2014 18:13, Ming Lei ha scritto:
> >
> >> That must be for generating guest irq, which should have been
> >> processed as batch easily.
> >
> >
> > No, guest irqs are generated (with notify_guest) on every I/O completion
> > even in 2.0.
>
> In 2.0, only notify_guest() is called after event batch is completed,
Ah, you're right.
> I wrote one patch days ago for fixing the problem, and today
> it is just verified that writes can be decreased to 10K from 120K.
Great. Can you test/review my aio_notify patch and submit both then? Bonus
points, but not a requirement IMO, if it also helps non-dataplane.
This would only leave rt_sigprocmask.
> BTW, what do you think about the patch v4 for submitting I/O as batch?
I was waiting for Kevin to review it.
Paolo
- Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2, (continued)
- Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2, Stefan Hajnoczi, 2014/07/02
- Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2, Paolo Bonzini, 2014/07/02
- Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2, Kevin Wolf, 2014/07/02
- Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2, Paolo Bonzini, 2014/07/02
- Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2, Kevin Wolf, 2014/07/02
- Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2, Paolo Bonzini, 2014/07/02
- Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2, Ming Lei, 2014/07/02
- Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2, Ming Lei, 2014/07/02
- Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2, Paolo Bonzini, 2014/07/02
- Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2, Ming Lei, 2014/07/02
- Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2,
Paolo Bonzini <=
- Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2, Ming Lei, 2014/07/02
- Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2, Paolo Bonzini, 2014/07/02
- Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2, Ming Lei, 2014/07/03
- Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2, Paolo Bonzini, 2014/07/03
- Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2, Ming Lei, 2014/07/03
- Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2, Paolo Bonzini, 2014/07/03
- Re: [Qemu-devel] [regression] dataplane: throughout -40% by commit 580b6b2aa2, Ming Lei, 2014/07/03