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| author | Santosh Shilimkar <santosh.shilimkar@oracle.com> | 2016-07-04 22:35:15 -0700 |
|---|---|---|
| committer | Santosh Shilimkar <santosh.shilimkar@oracle.com> | 2017-01-02 14:02:59 -0800 |
| commit | 3289025aedc018f8fd9d0e37fb9efa0c6d531ffa (patch) | |
| tree | 251ddb4c6606d91809d98d40a22e18382025664e /net/rds/rds.h | |
| parent | f9fb69adb6c7acca60977a4db5a5f95b8e66c041 (diff) | |
| download | linux-3289025aedc018f8fd9d0e37fb9efa0c6d531ffa.tar.gz linux-3289025aedc018f8fd9d0e37fb9efa0c6d531ffa.tar.bz2 linux-3289025aedc018f8fd9d0e37fb9efa0c6d531ffa.zip | |
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/rds.h')
| -rw-r--r-- | net/rds/rds.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/net/rds/rds.h b/net/rds/rds.h index f713194e4620..07fff73dd4f3 100644 --- a/net/rds/rds.h +++ b/net/rds/rds.h @@ -253,6 +253,11 @@ struct rds_ext_header_rdma_dest { #define RDS_EXTHDR_GEN_NUM 6 #define __RDS_EXTHDR_MAX 16 /* for now */ +#define RDS_RX_MAX_TRACES (RDS_MSG_RX_DGRAM_TRACE_MAX + 1) +#define RDS_MSG_RX_HDR 0 +#define RDS_MSG_RX_START 1 +#define RDS_MSG_RX_END 2 +#define RDS_MSG_RX_CMSG 3 struct rds_incoming { atomic_t i_refcount; @@ -265,6 +270,7 @@ struct rds_incoming { rds_rdma_cookie_t i_rdma_cookie; struct timeval i_rx_tstamp; + u64 i_rx_lat_trace[RDS_RX_MAX_TRACES]; }; struct rds_mr { @@ -575,6 +581,10 @@ struct rds_sock { unsigned char rs_recverr, rs_cong_monitor; u32 rs_hash_initval; + + /* Socket receive path trace points*/ + u8 rs_rx_traces; + u8 rs_rx_trace[RDS_MSG_RX_DGRAM_TRACE_MAX]; }; static inline struct rds_sock *rds_sk_to_rs(const struct sock *sk) |