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| author | Chuck Lever <chuck.lever@oracle.com> | 2020-12-29 23:55:17 +0300 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2021-01-25 17:36:28 +0300 |
| commit | 22df5a22462e836ccb30634c3a52602091179a73 (patch) | |
| tree | 26ac5784c1285499b0a1598cba5a3eab27658ebe /net/sunrpc/xprtrdma/svc_rdma.c | |
| parent | df971cd853c05778ae1175e8aeb80a04bb9d4be5 (diff) | |
| download | linux-22df5a22462e836ccb30634c3a52602091179a73.tar.xz | |
svcrdma: Convert rdma_stat_sq_starve to a per-CPU counter
Avoid the overhead of a memory bus lock cycle for counting a value
that is hardly every used.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'net/sunrpc/xprtrdma/svc_rdma.c')
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma.c b/net/sunrpc/xprtrdma/svc_rdma.c index 3e5e622bad81..ee768d4c3c90 100644 --- a/net/sunrpc/xprtrdma/svc_rdma.c +++ b/net/sunrpc/xprtrdma/svc_rdma.c @@ -66,7 +66,7 @@ static unsigned int max_max_inline = RPCRDMA_MAX_INLINE_THRESH; struct percpu_counter svcrdma_stat_recv; atomic_t rdma_stat_read; atomic_t rdma_stat_write; -atomic_t rdma_stat_sq_starve; +struct percpu_counter svcrdma_stat_sq_starve; atomic_t rdma_stat_rq_starve; atomic_t rdma_stat_rq_poll; atomic_t rdma_stat_rq_prod; @@ -199,10 +199,10 @@ static struct ctl_table svcrdma_parm_table[] = { }, { .procname = "rdma_stat_sq_starve", - .data = &rdma_stat_sq_starve, - .maxlen = sizeof(atomic_t), + .data = &svcrdma_stat_sq_starve, + .maxlen = SVCRDMA_COUNTER_BUFSIZ, .mode = 0644, - .proc_handler = read_reset_stat, + .proc_handler = svcrdma_counter_handler, }, { .procname = "rdma_stat_rq_starve", @@ -267,6 +267,7 @@ static void svc_rdma_proc_cleanup(void) unregister_sysctl_table(svcrdma_table_header); svcrdma_table_header = NULL; + percpu_counter_destroy(&svcrdma_stat_sq_starve); percpu_counter_destroy(&svcrdma_stat_recv); } @@ -280,11 +281,15 @@ static int svc_rdma_proc_init(void) rc = percpu_counter_init(&svcrdma_stat_recv, 0, GFP_KERNEL); if (rc) goto out_err; + rc = percpu_counter_init(&svcrdma_stat_sq_starve, 0, GFP_KERNEL); + if (rc) + goto out_err; svcrdma_table_header = register_sysctl_table(svcrdma_root_table); return 0; out_err: + percpu_counter_destroy(&svcrdma_stat_recv); return rc; } |