net: rds: add per rds connection cache statistics (fe3475af) · Commits · 戴 / test

The variable cache_allocs is to indicate how many frags (KiB) are in one rds connection frag cache. The command "rds-info -Iv" will output the rds connection cache statistics as below: " RDS IB Connections: LocalAddr RemoteAddr Tos SL LocalDev RemoteDev 1.1.1.14 1.1.1.14 58 255 fe80::2:c903:a:7a31 fe80::2:c903:a:7a31 send_wr=256, recv_wr=1024, send_sge=8, rdma_mr_max=4096, rdma_mr_size=257, cache_allocs=12 " This means that there are about 12KiB frag in this rds connection frag cache. Since rds.h in rds-tools is not related with the kernel rds.h, the change in kernel rds.h does not affect rds-tools. rds-info in rds-tools 2.0.5 and 2.0.6 is tested with this commit. It works well. Signed-off-by:

Zhu Yanjun <yanjun.zhu@oracle.com> Signed-off-by:

David S. Miller <davem@davemloft.net>

include/uapi/linux/rds.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -250,6 +250,7 @@ struct rds_info_rdma_connection {
		__u32 rdma_mr_max;
		__u32 rdma_mr_size;
		__u8 tos;
		__u32 cache_allocs;
		};

		struct rds6_info_rdma_connection {
		@@ -264,6 +265,7 @@ struct rds6_info_rdma_connection {
		__u32 rdma_mr_max;
		__u32 rdma_mr_size;
		__u8 tos;
		__u32 cache_allocs;
		};

		/* RDS message Receive Path Latency points */

net/rds/ib.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -318,6 +318,7 @@ static int rds_ib_conn_info_visitor(struct rds_connection *conn,
		iinfo->max_recv_wr = ic->i_recv_ring.w_nr;
		iinfo->max_send_sge = rds_ibdev->max_sge;
		rds_ib_get_mr_info(rds_ibdev, iinfo);
		iinfo->cache_allocs = atomic_read(&ic->i_cache_allocs);
		}
		return 1;
		}
		@@ -351,6 +352,7 @@ static int rds6_ib_conn_info_visitor(struct rds_connection *conn,
		iinfo6->max_recv_wr = ic->i_recv_ring.w_nr;
		iinfo6->max_send_sge = rds_ibdev->max_sge;
		rds6_ib_get_mr_info(rds_ibdev, iinfo6);
		iinfo6->cache_allocs = atomic_read(&ic->i_cache_allocs);
		}
		return 1;
		}

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