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Date: Thu, 3 Feb 2022 16:09:31 -0800 From: Joe Damato <jdamato@...tly.com> To: netdev@...r.kernel.org, kuba@...nel.org, ilias.apalodimas@...aro.org, davem@...emloft.net, hawk@...nel.org, saeed@...nel.org, ttoukan.linux@...il.com, brouer@...hat.com Cc: Joe Damato <jdamato@...tly.com> Subject: [net-next v4 09/11] page_pool: Add stat tracking cache refill Add a stat tracking succesfull allocations which triggered a refill. Signed-off-by: Joe Damato <jdamato@...tly.com> --- include/net/page_pool.h | 1 + net/core/page_pool.c | 4 +++- 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/include/net/page_pool.h b/include/net/page_pool.h index b243480..65cd0ca 100644 --- a/include/net/page_pool.h +++ b/include/net/page_pool.h @@ -149,6 +149,7 @@ struct page_pool_stats { u64 empty; /* failed refills due to empty ptr ring, forcing * slow path allocation */ + u64 refill; /* allocations via successful refill */ } alloc; }; #endif diff --git a/net/core/page_pool.c b/net/core/page_pool.c index b25ded1..4fe48ec 100644 --- a/net/core/page_pool.c +++ b/net/core/page_pool.c @@ -172,8 +172,10 @@ static struct page *page_pool_refill_alloc_cache(struct page_pool *pool) } while (pool->alloc.count < PP_ALLOC_CACHE_REFILL); /* Return last page */ - if (likely(pool->alloc.count > 0)) + if (likely(pool->alloc.count > 0)) { page = pool->alloc.cache[--pool->alloc.count]; + this_cpu_inc_alloc_stat(pool, refill); + } return page; } -- 2.7.4
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