On Tue, May 10, 2016 at 11:40:33AM +0200, Kevin Wolf wrote:
> Am 10.05.2016 um 11:30 hat Stefan Hajnoczi geschrieben:
> > On Mon, May 09, 2016 at 06:31:44PM +0200, Paolo Bonzini wrote:
> > > On 19/04/2016 11:09, Stefan Hajnoczi wrote:
> > > >> > This has better performance because it executes fewer
On Tue, May 10, 2016 at 12:32:27PM +0200, Paolo Bonzini wrote:
> On 10/05/2016 11:40, Kevin Wolf wrote:
> > > Regarding performance, I'm thinking about a guest with 8 disks (queue
> > > depth 32). The worst case is when the guest submits 32 requests at once
> > > but the Linux AIO event limit has
On Thu, Apr 07, 2016 at 06:33:36PM +0200, Paolo Bonzini wrote:
> This has better performance because it executes fewer system calls
> and does not use a bottom half per disk.
>
> Originally proposed by Ming Lei.
>
> Signed-off-by: Paolo Bonzini
> ---
> async.c| 23 +
On 10/05/2016 11:40, Kevin Wolf wrote:
> > Regarding performance, I'm thinking about a guest with 8 disks (queue
> > depth 32). The worst case is when the guest submits 32 requests at once
> > but the Linux AIO event limit has already been reached. Then the disk
> > is starved until other disks
Am 10.05.2016 um 11:30 hat Stefan Hajnoczi geschrieben:
> On Mon, May 09, 2016 at 06:31:44PM +0200, Paolo Bonzini wrote:
> > On 19/04/2016 11:09, Stefan Hajnoczi wrote:
> > >> > This has better performance because it executes fewer system calls
> > >> > and does not use a bottom half per disk.
> >
On Mon, May 09, 2016 at 06:31:44PM +0200, Paolo Bonzini wrote:
> On 19/04/2016 11:09, Stefan Hajnoczi wrote:
> >> > This has better performance because it executes fewer system calls
> >> > and does not use a bottom half per disk.
> > Each aio_context_t is initialized for 128 in-flight requests in
On 19/04/2016 11:09, Stefan Hajnoczi wrote:
>> > This has better performance because it executes fewer system calls
>> > and does not use a bottom half per disk.
> Each aio_context_t is initialized for 128 in-flight requests in
> laio_init().
>
> Will it be possible to hit the limit now that all
On Thu, Apr 07, 2016 at 06:33:36PM +0200, Paolo Bonzini wrote:
> This has better performance because it executes fewer system calls
> and does not use a bottom half per disk.
Each aio_context_t is initialized for 128 in-flight requests in
laio_init().
Will it be possible to hit the limit now that
This has better performance because it executes fewer system calls
and does not use a bottom half per disk.
Originally proposed by Ming Lei.
Signed-off-by: Paolo Bonzini
---
async.c| 23 +++
block/linux-aio.c | 3 +
block/raw-posix.c
