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

[Yan Vugenfirer]

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. 

Best regards,
Yan.

> On 20 Sep 2017, at 19:05, Tomáš Golembiovský <address@hidden> wrote:
> 
> Signed-off-by: Tomáš Golembiovský <address@hidden>
> ---
> 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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