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Commit 09b2b8f5 authored by Santosh Shilimkar's avatar Santosh Shilimkar
Browse files

RDS: IB: add few useful cache stasts 



Tracks the ib receive cache total, incoming and frag allocations.

Signed-off-by: default avatarSantosh Shilimkar <santosh.shilimkar@oracle.com>
parent 581d53c9

net/rds/ib.h

+7 −0
Original line number Diff line number Diff line
@@ -151,6 +151,7 @@ struct rds_ib_connection { 
	u64			i_ack_recv;	/* last ACK received */

	struct rds_ib_refill_cache i_cache_incs;

	struct rds_ib_refill_cache i_cache_frags;

	atomic_t		i_cache_allocs;



	/* sending acks */

	unsigned long		i_ack_flags;
@@ -254,6 +255,8 @@ struct rds_ib_statistics { 
	uint64_t	s_ib_rx_refill_from_cq;

	uint64_t	s_ib_rx_refill_from_thread;

	uint64_t	s_ib_rx_alloc_limit;

	uint64_t	s_ib_rx_total_frags;

	uint64_t	s_ib_rx_total_incs;

	uint64_t	s_ib_rx_credit_updates;

	uint64_t	s_ib_ack_sent;

	uint64_t	s_ib_ack_send_failure;
@@ -276,6 +279,8 @@ struct rds_ib_statistics { 
	uint64_t	s_ib_rdma_mr_1m_reused;

	uint64_t	s_ib_atomic_cswp;

	uint64_t	s_ib_atomic_fadd;

	uint64_t	s_ib_recv_added_to_cache;

	uint64_t	s_ib_recv_removed_from_cache;

};



extern struct workqueue_struct *rds_ib_wq;
@@ -406,6 +411,8 @@ int rds_ib_xmit_atomic(struct rds_connection *conn, struct rm_atomic_op *op); 
/* ib_stats.c */

DECLARE_PER_CPU(struct rds_ib_statistics, rds_ib_stats);

#define rds_ib_stats_inc(member) rds_stats_inc_which(rds_ib_stats, member)

#define rds_ib_stats_add(member, count) \

		rds_stats_add_which(rds_ib_stats, member, count)

unsigned int rds_ib_stats_info_copy(struct rds_info_iterator *iter,

				    unsigned int avail);

net/rds/ib_recv.c

+6 −0
Original line number Diff line number Diff line
@@ -194,6 +194,8 @@ static void rds_ib_frag_free(struct rds_ib_connection *ic, 
	rdsdebug("frag %p page %p\n", frag, sg_page(&frag->f_sg));



	rds_ib_recv_cache_put(&frag->f_cache_entry, &ic->i_cache_frags);

	atomic_add(RDS_FRAG_SIZE / SZ_1K, &ic->i_cache_allocs);

	rds_ib_stats_add(s_ib_recv_added_to_cache, RDS_FRAG_SIZE);

}



/* Recycle inc after freeing attached frags */
@@ -261,6 +263,7 @@ static struct rds_ib_incoming *rds_ib_refill_one_inc(struct rds_ib_connection *i 
			atomic_dec(&rds_ib_allocation);

			return NULL;

		}

		rds_ib_stats_inc(s_ib_rx_total_incs);

	}

	INIT_LIST_HEAD(&ibinc->ii_frags);

	rds_inc_init(&ibinc->ii_inc, ic->conn, ic->conn->c_faddr);
@@ -278,6 +281,8 @@ static struct rds_page_frag *rds_ib_refill_one_frag(struct rds_ib_connection *ic 
	cache_item = rds_ib_recv_cache_get(&ic->i_cache_frags);

	if (cache_item) {

		frag = container_of(cache_item, struct rds_page_frag, f_cache_entry);

		atomic_sub(RDS_FRAG_SIZE / SZ_1K, &ic->i_cache_allocs);

		rds_ib_stats_add(s_ib_recv_added_to_cache, RDS_FRAG_SIZE);

	} else {

		frag = kmem_cache_alloc(rds_ib_frag_slab, slab_mask);

		if (!frag)
@@ -290,6 +295,7 @@ static struct rds_page_frag *rds_ib_refill_one_frag(struct rds_ib_connection *ic 
			kmem_cache_free(rds_ib_frag_slab, frag);

			return NULL;

		}

		rds_ib_stats_inc(s_ib_rx_total_frags);

	}



	INIT_LIST_HEAD(&frag->f_item);

net/rds/ib_stats.c

+2 −0
Original line number Diff line number Diff line
@@ -55,6 +55,8 @@ static const char *const rds_ib_stat_names[] = { 
	"ib_rx_refill_from_cq",

	"ib_rx_refill_from_thread",

	"ib_rx_alloc_limit",

	"ib_rx_total_frags",

	"ib_rx_total_incs",

	"ib_rx_credit_updates",

	"ib_ack_sent",

	"ib_ack_send_failure",