diff options
| author | Guvenc Gulce <guvenc@linux.ibm.com> | 2021-06-16 16:52:55 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-06-16 12:54:02 -0700 |
| commit | e0e4b8fa533858532f1b9ea9c6a4660d09beb37a (patch) | |
| tree | dc04b676e1642f2333f69ad513152c0b999fecaa /net/smc/smc_rx.c | |
| parent | fb0a1dacf2bef929bf047c5434bfb976ac6a93e6 (diff) | |
| download | linux-e0e4b8fa533858532f1b9ea9c6a4660d09beb37a.tar.gz | |
net/smc: Add SMC statistics support
Add the ability to collect SMC statistics information. Per-cpu
variables are used to collect the statistic information for better
performance and for reducing concurrency pitfalls. The code that is
collecting statistic data is implemented in macros to increase code
reuse and readability.
Signed-off-by: Guvenc Gulce <guvenc@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/smc/smc_rx.c')
| -rw-r--r-- | net/smc/smc_rx.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/net/smc/smc_rx.c b/net/smc/smc_rx.c index fcfac59f8b72..ce1ae39923b1 100644 --- a/net/smc/smc_rx.c +++ b/net/smc/smc_rx.c @@ -21,6 +21,7 @@ #include "smc_cdc.h" #include "smc_tx.h" /* smc_tx_consumer_update() */ #include "smc_rx.h" +#include "smc_stats.h" /* callback implementation to wakeup consumers blocked with smc_rx_wait(). * indirectly called by smc_cdc_msg_recv_action(). @@ -227,6 +228,7 @@ static int smc_rx_recv_urg(struct smc_sock *smc, struct msghdr *msg, int len, conn->urg_state == SMC_URG_READ) return -EINVAL; + SMC_STAT_INC(!conn->lnk, urg_data_cnt); if (conn->urg_state == SMC_URG_VALID) { if (!(flags & MSG_PEEK)) smc->conn.urg_state = SMC_URG_READ; @@ -303,6 +305,12 @@ int smc_rx_recvmsg(struct smc_sock *smc, struct msghdr *msg, timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); target = sock_rcvlowat(sk, flags & MSG_WAITALL, len); + readable = atomic_read(&conn->bytes_to_rcv); + if (readable >= conn->rmb_desc->len) + SMC_STAT_RMB_RX_FULL(!conn->lnk); + + if (len < readable) + SMC_STAT_RMB_RX_SIZE_SMALL(!conn->lnk); /* we currently use 1 RMBE per RMB, so RMBE == RMB base addr */ rcvbuf_base = conn->rx_off + conn->rmb_desc->cpu_addr; |