Re: [Qemu-devel] [virtio-dev] [PATCH 1/1] virtio-balloon: include buffers and chached memory statistics

["Tomáš Golembiovský" <tgolembi@redhat.com>]

On Thu, 16 Nov 2017 15:38:21 +0200
Yan Vugenfirer <yvugenfi@redhat.com> wrote:

> Hello All,
> 
> Michael asked me to comment regarding the possibility to get this statistics on Windows.
> By using Win32_OperatingSystem WMI class we can calculate the amount of cached memory (https://msdn.microsoft.com/en-us/library/aa394239(v=vs.85).aspx <https://msdn.microsoft.com/en-us/library/aa394239(v=vs.85).aspx> http://brandonlive.com/2010/02/21/measuring-memory-usage-in-windows-7/ <http://brandonlive.com/2010/02/21/measuring-memory-usage-in-windows-7/>), but Windows doesn’t let to distinguish between “cached and buffers” as far as I see. 

Thanks for the input, Yan. That's definitely good to know.

    Tomas

> 
> Best regards,
> Yan.
> 
> > On 20 Sep 2017, at 19:05, Tomáš Golembiovský <tgolembi@redhat.com> wrote:
> > 
> > Signed-off-by: Tomáš Golembiovský <tgolembi@redhat.com>
> > ---
> > hw/virtio/virtio-balloon.c                      | 2 ++
> > include/standard-headers/linux/virtio_balloon.h | 4 +++-
> > 2 files changed, 5 insertions(+), 1 deletion(-)
> > 
> > diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
> > index a705e0ec55..0434784c14 100644
> > --- a/hw/virtio/virtio-balloon.c
> > +++ b/hw/virtio/virtio-balloon.c
> > @@ -49,6 +49,8 @@ static const char *balloon_stat_names[] = {
> >    [VIRTIO_BALLOON_S_MEMFREE] = "stat-free-memory",
> >    [VIRTIO_BALLOON_S_MEMTOT] = "stat-total-memory",
> >    [VIRTIO_BALLOON_S_AVAIL] = "stat-available-memory",
> > +   [VIRTIO_BALLOON_S_BUFFERS] = "stat-linux-buffers",
> > +   [VIRTIO_BALLOON_S_CACHED] = "stat-linux-cached",
> >    [VIRTIO_BALLOON_S_NR] = NULL
> > };
> > 
> > diff --git a/include/standard-headers/linux/virtio_balloon.h b/include/standard-headers/linux/virtio_balloon.h
> > index 9d06ccd066..d61efbfcee 100644
> > --- a/include/standard-headers/linux/virtio_balloon.h
> > +++ b/include/standard-headers/linux/virtio_balloon.h
> > @@ -52,7 +52,9 @@ struct virtio_balloon_config {
> > #define VIRTIO_BALLOON_S_MEMFREE  4   /* Total amount of free memory */
> > #define VIRTIO_BALLOON_S_MEMTOT   5   /* Total amount of memory */
> > #define VIRTIO_BALLOON_S_AVAIL    6   /* Available memory as in /proc */
> > -#define VIRTIO_BALLOON_S_NR       7
> > +#define VIRTIO_BALLOON_S_BUFFERS  7   /* Buffers memory as in /proc */
> > +#define VIRTIO_BALLOON_S_CACHED   8   /* Cached memory as in /proc */
> > +#define VIRTIO_BALLOON_S_NR       9
> > 
> > /*
> >  * Memory statistics structure.
> > -- 
> > 2.14.1
> > 
> > 
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> >   
> 


-- 
Tomáš Golembiovský <tgolembi@redhat.com>