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Jonathan Helman

2018-Feb-17 05:44 UTC

[PATCH] virtio_balloon: export huge page allocation statistics

Export statistics for successful and failed huge page allocations
from the virtio balloon driver. These 2 stats come directly from
the vm_events HTLB_BUDDY_PGALLOC and HTLB_BUDDY_PGALLOC_FAIL.

Signed-off-by: Jonathan Helman <jonathan.helman at oracle.com>
---
 drivers/virtio/virtio_balloon.c     | 6 ++++++
 include/uapi/linux/virtio_balloon.h | 4 +++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index dfe5684..6b237e3 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -272,6 +272,12 @@ static unsigned int update_balloon_stats(struct
virtio_balloon *vb)
 				pages_to_bytes(events[PSWPOUT]));
 	update_stat(vb, idx++, VIRTIO_BALLOON_S_MAJFLT, events[PGMAJFAULT]);
 	update_stat(vb, idx++, VIRTIO_BALLOON_S_MINFLT, events[PGFAULT]);
+#ifdef CONFIG_HUGETLB_PAGE
+	update_stat(vb, idx++, VIRTIO_BALLOON_S_HTLB_PGALLOC,
+		    events[HTLB_BUDDY_PGALLOC]);
+	update_stat(vb, idx++, VIRTIO_BALLOON_S_HTLB_PGFAIL,
+		    events[HTLB_BUDDY_PGALLOC_FAIL]);
+#endif
 #endif
 	update_stat(vb, idx++, VIRTIO_BALLOON_S_MEMFREE,
 				pages_to_bytes(i.freeram));
diff --git a/include/uapi/linux/virtio_balloon.h
b/include/uapi/linux/virtio_balloon.h
index 4e8b830..e3e8071 100644
--- a/include/uapi/linux/virtio_balloon.h
+++ b/include/uapi/linux/virtio_balloon.h
@@ -53,7 +53,9 @@ struct virtio_balloon_config {
 #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_CACHES   7   /* Disk caches */
-#define VIRTIO_BALLOON_S_NR       8
+#define VIRTIO_BALLOON_S_HTLB_PGALLOC  8  /* Number of htlb pgalloc successes
*/
+#define VIRTIO_BALLOON_S_HTLB_PGFAIL   9  /* Number of htlb pgalloc failures */
+#define VIRTIO_BALLOON_S_NR       10
 
 /*
  * Memory statistics structure.
-- 
1.8.3.1

Michael S. Tsirkin

2018-Feb-27 15:20 UTC

head link

[PATCH] virtio_balloon: export huge page allocation statistics

On Fri, Feb 16, 2018 at 09:44:32PM -0800, Jonathan Helman
wrote:> Export statistics for successful and failed huge page allocations
> from the virtio balloon driver. These 2 stats come directly from
> the vm_events HTLB_BUDDY_PGALLOC and HTLB_BUDDY_PGALLOC_FAIL.
> Signed-off-by: Jonathan Helman <jonathan.helman at oracle.com>
Any host/guest intergace changes need to be copied to
the virtio TC mailing list (subscriber-only, sorry about that):
virtio-dev at lists.oasis-open.org
> ---
>  drivers/virtio/virtio_balloon.c     | 6 ++++++
>  include/uapi/linux/virtio_balloon.h | 4 +++-
>  2 files changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/virtio/virtio_balloon.c
b/drivers/virtio/virtio_balloon.c
> index dfe5684..6b237e3 100644
> --- a/drivers/virtio/virtio_balloon.c
> +++ b/drivers/virtio/virtio_balloon.c
> @@ -272,6 +272,12 @@ static unsigned int update_balloon_stats(struct
virtio_balloon *vb)
>  				pages_to_bytes(events[PSWPOUT]));
>  	update_stat(vb, idx++, VIRTIO_BALLOON_S_MAJFLT, events[PGMAJFAULT]);
>  	update_stat(vb, idx++, VIRTIO_BALLOON_S_MINFLT, events[PGFAULT]);
> +#ifdef CONFIG_HUGETLB_PAGE
> +	update_stat(vb, idx++, VIRTIO_BALLOON_S_HTLB_PGALLOC,
> +		    events[HTLB_BUDDY_PGALLOC]);
> +	update_stat(vb, idx++, VIRTIO_BALLOON_S_HTLB_PGFAIL,
> +		    events[HTLB_BUDDY_PGALLOC_FAIL]);
> +#endif
>  #endif
>  	update_stat(vb, idx++, VIRTIO_BALLOON_S_MEMFREE,
>  				pages_to_bytes(i.freeram));
> diff --git a/include/uapi/linux/virtio_balloon.h
b/include/uapi/linux/virtio_balloon.h
> index 4e8b830..e3e8071 100644
> --- a/include/uapi/linux/virtio_balloon.h
> +++ b/include/uapi/linux/virtio_balloon.h
> @@ -53,7 +53,9 @@ struct virtio_balloon_config {
>  #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_CACHES   7   /* Disk caches */
> -#define VIRTIO_BALLOON_S_NR       8
> +#define VIRTIO_BALLOON_S_HTLB_PGALLOC  8  /* Number of htlb pgalloc
successes */
> +#define VIRTIO_BALLOON_S_HTLB_PGFAIL   9  /* Number of htlb pgalloc
failures */
> +#define VIRTIO_BALLOON_S_NR       10
Can you clarify the comments pls? Eschew abbreviation.
>  
>  /*
>   * Memory statistics structure.
> -- 
> 1.8.3.1

Jonathan Helman

2018-Mar-02 22:16 UTC

head link

[PATCH] virtio_balloon: export huge page allocation statistics

On 02/27/2018 07:20 AM, Michael S. Tsirkin wrote:> On Fri, Feb 16, 2018 at 09:44:32PM -0800, Jonathan Helman wrote:
>> Export statistics for successful and failed huge page allocations
>> from the virtio balloon driver. These 2 stats come directly from
>> the vm_events HTLB_BUDDY_PGALLOC and HTLB_BUDDY_PGALLOC_FAIL.
>> Signed-off-by: Jonathan Helman <jonathan.helman at oracle.com>
> 
> Any host/guest intergace changes need to be copied to
> the virtio TC mailing list (subscriber-only, sorry about that):
> virtio-dev at lists.oasis-open.org
> 
Sorry, will do on v2.
>> ---
>>   drivers/virtio/virtio_balloon.c     | 6 ++++++
>>   include/uapi/linux/virtio_balloon.h | 4 +++-
>>   2 files changed, 9 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/virtio/virtio_balloon.c
b/drivers/virtio/virtio_balloon.c
>> index dfe5684..6b237e3 100644
>> --- a/drivers/virtio/virtio_balloon.c
>> +++ b/drivers/virtio/virtio_balloon.c
>> @@ -272,6 +272,12 @@ static unsigned int update_balloon_stats(struct
virtio_balloon *vb)
>>   				pages_to_bytes(events[PSWPOUT]));
>>   	update_stat(vb, idx++, VIRTIO_BALLOON_S_MAJFLT, events[PGMAJFAULT]);
>>   	update_stat(vb, idx++, VIRTIO_BALLOON_S_MINFLT, events[PGFAULT]);
>> +#ifdef CONFIG_HUGETLB_PAGE
>> +	update_stat(vb, idx++, VIRTIO_BALLOON_S_HTLB_PGALLOC,
>> +		    events[HTLB_BUDDY_PGALLOC]);
>> +	update_stat(vb, idx++, VIRTIO_BALLOON_S_HTLB_PGFAIL,
>> +		    events[HTLB_BUDDY_PGALLOC_FAIL]);
>> +#endif
>>   #endif
>>   	update_stat(vb, idx++, VIRTIO_BALLOON_S_MEMFREE,
>>   				pages_to_bytes(i.freeram));
>> diff --git a/include/uapi/linux/virtio_balloon.h
b/include/uapi/linux/virtio_balloon.h
>> index 4e8b830..e3e8071 100644
>> --- a/include/uapi/linux/virtio_balloon.h
>> +++ b/include/uapi/linux/virtio_balloon.h
>> @@ -53,7 +53,9 @@ struct virtio_balloon_config {
>>   #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_CACHES   7   /* Disk caches */
>> -#define VIRTIO_BALLOON_S_NR       8
>> +#define VIRTIO_BALLOON_S_HTLB_PGALLOC  8  /* Number of htlb pgalloc
successes */
>> +#define VIRTIO_BALLOON_S_HTLB_PGFAIL   9  /* Number of htlb pgalloc
failures */
>> +#define VIRTIO_BALLOON_S_NR       10
> 
> Can you clarify the comments pls? Eschew abbreviation.
Sure. How about the following instead? Hoping it makes things clearer, 
without going over the 80 character limit ;)

#define VIRTIO_BALLOON_S_HTLB_PGALLOC  8  /* Hugetlb page allocations */
#define VIRTIO_BALLOON_S_HTLB_PGFAIL   9  /* Hugetlb page allocation 
failures */

If this is better, I'll send out a v2.

Thanks,
Jon
> 
>>   
>>   /*
>>    * Memory statistics structure.
>> -- 
>> 1.8.3.1

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