diff options
| author | Guvenc Gulce <guvenc@linux.ibm.com> | 2021-06-16 17:52:55 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-06-16 22:54:02 +0300 |
| commit | e0e4b8fa533858532f1b9ea9c6a4660d09beb37a (patch) | |
| tree | dc04b676e1642f2333f69ad513152c0b999fecaa /net/smc/smc_core.c | |
| parent | fb0a1dacf2bef929bf047c5434bfb976ac6a93e6 (diff) | |
| download | linux-e0e4b8fa533858532f1b9ea9c6a4660d09beb37a.tar.xz | |
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_core.c')
| -rw-r--r-- | net/smc/smc_core.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c index 317bc2c90fab..d69f58f670a1 100644 --- a/net/smc/smc_core.c +++ b/net/smc/smc_core.c @@ -33,6 +33,7 @@ #include "smc_close.h" #include "smc_ism.h" #include "smc_netlink.h" +#include "smc_stats.h" #define SMC_LGR_NUM_INCR 256 #define SMC_LGR_FREE_DELAY_SERV (600 * HZ) @@ -2029,6 +2030,7 @@ static int __smc_buf_create(struct smc_sock *smc, bool is_smcd, bool is_rmb) struct smc_link_group *lgr = conn->lgr; struct list_head *buf_list; int bufsize, bufsize_short; + bool is_dgraded = false; struct mutex *lock; /* lock buffer list */ int sk_buf_size; @@ -2056,6 +2058,8 @@ static int __smc_buf_create(struct smc_sock *smc, bool is_smcd, bool is_rmb) /* check for reusable slot in the link group */ buf_desc = smc_buf_get_slot(bufsize_short, lock, buf_list); if (buf_desc) { + SMC_STAT_RMB_SIZE(is_smcd, is_rmb, bufsize); + SMC_STAT_BUF_REUSE(is_smcd, is_rmb); memset(buf_desc->cpu_addr, 0, bufsize); break; /* found reusable slot */ } @@ -2067,9 +2071,16 @@ static int __smc_buf_create(struct smc_sock *smc, bool is_smcd, bool is_rmb) if (PTR_ERR(buf_desc) == -ENOMEM) break; - if (IS_ERR(buf_desc)) + if (IS_ERR(buf_desc)) { + if (!is_dgraded) { + is_dgraded = true; + SMC_STAT_RMB_DOWNGRADED(is_smcd, is_rmb); + } continue; + } + SMC_STAT_RMB_ALLOC(is_smcd, is_rmb); + SMC_STAT_RMB_SIZE(is_smcd, is_rmb, bufsize); buf_desc->used = 1; mutex_lock(lock); list_add(&buf_desc->list, buf_list); |