Commit 6b95e338 authored by Joe Damato's avatar Joe Damato Committed by David S. Miller
Browse files

page_pool: Add function to batch and return stats 



Adds a function page_pool_get_stats which can be used by drivers to obtain
stats for a specified page_pool.

Signed-off-by: default avatarJoe Damato <jdamato@fastly.com>
Acked-by: default avatarJesper Dangaard Brouer <brouer@redhat.com>
Reviewed-by: default avatarIlias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ad6fa1e1

include/net/page_pool.h

+17 −0
Original line number Diff line number Diff line
@@ -107,6 +107,23 @@ struct page_pool_recycle_stats { 
			      * refcnt

			      */

};



/* This struct wraps the above stats structs so users of the

 * page_pool_get_stats API can pass a single argument when requesting the

 * stats for the page pool.

 */

struct page_pool_stats {

	struct page_pool_alloc_stats alloc_stats;

	struct page_pool_recycle_stats recycle_stats;

};



/*

 * Drivers that wish to harvest page pool stats and report them to users

 * (perhaps via ethtool, debugfs, or another mechanism) can allocate a

 * struct page_pool_stats call page_pool_get_stats to get stats for the specified pool.

 */

bool page_pool_get_stats(struct page_pool *pool,

			 struct page_pool_stats *stats);

#endif



struct page_pool {

net/core/page_pool.c

+25 −0
Original line number Diff line number Diff line
@@ -35,6 +35,31 @@ 
		struct page_pool_recycle_stats __percpu *s = pool->recycle_stats;	\

		this_cpu_inc(s->__stat);						\

	} while (0)



bool page_pool_get_stats(struct page_pool *pool,

			 struct page_pool_stats *stats)

{

	int cpu = 0;



	if (!stats)

		return false;



	memcpy(&stats->alloc_stats, &pool->alloc_stats, sizeof(pool->alloc_stats));



	for_each_possible_cpu(cpu) {

		const struct page_pool_recycle_stats *pcpu =

			per_cpu_ptr(pool->recycle_stats, cpu);



		stats->recycle_stats.cached += pcpu->cached;

		stats->recycle_stats.cache_full += pcpu->cache_full;

		stats->recycle_stats.ring += pcpu->ring;

		stats->recycle_stats.ring_full += pcpu->ring_full;

		stats->recycle_stats.released_refcnt += pcpu->released_refcnt;

	}



	return true;

}

EXPORT_SYMBOL(page_pool_get_stats);

#else

#define alloc_stat_inc(pool, __stat)

#define recycle_stat_inc(pool, __stat)