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authorSantosh Shilimkar <santosh.shilimkar@oracle.com>2016-07-05 08:35:15 +0300
committerSantosh Shilimkar <santosh.shilimkar@oracle.com>2017-01-03 01:02:59 +0300
commit3289025aedc018f8fd9d0e37fb9efa0c6d531ffa (patch)
tree251ddb4c6606d91809d98d40a22e18382025664e /net/rds/ib_recv.c
parentf9fb69adb6c7acca60977a4db5a5f95b8e66c041 (diff)
downloadlinux-3289025aedc018f8fd9d0e37fb9efa0c6d531ffa.tar.xz
RDS: add receive message trace used by application
Socket option to tap receive path latency in various stages in nano seconds. It can be enabled on selective sockets using using SO_RDS_MSG_RXPATH_LATENCY socket option. RDS will return the data to application with RDS_CMSG_RXPATH_LATENCY in defined format. Scope is left to add more trace points for future without need of change in the interface. Reviewed-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Diffstat (limited to 'net/rds/ib_recv.c')
-rw-r--r--net/rds/ib_recv.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/rds/ib_recv.c b/net/rds/ib_recv.c
index 4b0f12679219..e10624aa6959 100644
--- a/net/rds/ib_recv.c
+++ b/net/rds/ib_recv.c
@@ -911,8 +911,12 @@ static void rds_ib_process_recv(struct rds_connection *conn,
ic->i_ibinc = ibinc;
hdr = &ibinc->ii_inc.i_hdr;
+ ibinc->ii_inc.i_rx_lat_trace[RDS_MSG_RX_HDR] =
+ local_clock();
memcpy(hdr, ihdr, sizeof(*hdr));
ic->i_recv_data_rem = be32_to_cpu(hdr->h_len);
+ ibinc->ii_inc.i_rx_lat_trace[RDS_MSG_RX_START] =
+ local_clock();
rdsdebug("ic %p ibinc %p rem %u flag 0x%x\n", ic, ibinc,
ic->i_recv_data_rem, hdr->h_flags);