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RDS: IB: add few useful cache stasts

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

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
This commit is contained in:
Santosh Shilimkar 2016-07-09 17:14:02 -07:00
parent 581d53c91c
commit 09b2b8f528
3 changed files with 15 additions and 0 deletions
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7
net/rds/ib.h
View file

@ -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);

6
net/rds/ib_recv.c
View file

@ -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);

2
net/rds/ib_stats.c
View file

@ -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",