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page_pool: Add recycle stats

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Add per-cpu stats tracking page pool recycling events:
	- cached: recycling placed page in the page pool cache
	- cache_full: page pool cache was full
	- ring: page placed into the ptr ring
	- ring_full: page released from page pool because the ptr ring was full
	- released_refcnt: page released (and not recycled) because refcnt > 1

Signed-off-by: Joe Damato <jdamato@fastly.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Joe Damato
2022-03-01 23:55:48 -08:00
committed by David S. Miller
parent 8610037e81
commit ad6fa1e1ab
2 changed files with 44 additions and 2 deletions
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16
include/net/page_pool.h
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@@ -95,6 +95,18 @@ struct page_pool_alloc_stats {
u64 refill; /* allocations via successful refill */
u64 waive; /* failed refills due to numa zone mismatch */
};
struct page_pool_recycle_stats {
u64 cached; /* recycling placed page in the cache. */
u64 cache_full; /* cache was full */
u64 ring; /* recycling placed page back into ptr ring */
u64 ring_full; /* page was released from page-pool because
* PTR ring was full.
*/
u64 released_refcnt; /* page released because of elevated
* refcnt
*/
};
#endif
struct page_pool {
@@ -144,6 +156,10 @@ struct page_pool {
*/
struct ptr_ring ring;
#ifdef CONFIG_PAGE_POOL_STATS
/* recycle stats are per-cpu to avoid locking */
struct page_pool_recycle_stats __percpu *recycle_stats;
#endif
atomic_t pages_state_release_cnt;
/* A page_pool is strictly tied to a single RX-queue being