[net-next][PATCH 15/18] RDS: add stat for socket recv memory usage

From: Santosh Shilimkar
Date: Mon Dec 05 2016 - 02:01:08 EST


From: Venkat Venkatsubra <venkat.x.venkatsubra@xxxxxxxxxx>

Tracks the receive side memory added to scokets and removed from sockets.

Signed-off-by: Venkat Venkatsubra <venkat.x.venkatsubra@xxxxxxxxxx>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@xxxxxxxxxx>
---
net/rds/rds.h | 3 +++
net/rds/recv.c | 4 ++++
2 files changed, 7 insertions(+)

diff --git a/net/rds/rds.h b/net/rds/rds.h
index 0bb8213..8ccd5a9 100644
--- a/net/rds/rds.h
+++ b/net/rds/rds.h
@@ -631,6 +631,9 @@ struct rds_statistics {
uint64_t s_cong_update_received;
uint64_t s_cong_send_error;
uint64_t s_cong_send_blocked;
+ uint64_t s_recv_bytes_added_to_socket;
+ uint64_t s_recv_bytes_removed_from_socket;
+
};

/* af_rds.c */
diff --git a/net/rds/recv.c b/net/rds/recv.c
index 9d0666e..ba19eee 100644
--- a/net/rds/recv.c
+++ b/net/rds/recv.c
@@ -94,6 +94,10 @@ static void rds_recv_rcvbuf_delta(struct rds_sock *rs, struct sock *sk,
return;

rs->rs_rcv_bytes += delta;
+ if (delta > 0)
+ rds_stats_add(s_recv_bytes_added_to_socket, delta);
+ else
+ rds_stats_add(s_recv_bytes_removed_from_socket, -delta);
now_congested = rs->rs_rcv_bytes > rds_sk_rcvbuf(rs);

rdsdebug("rs %p (%pI4:%u) recv bytes %d buf %d "
--
1.9.1