From f4e1357184a5759f97fa69adadf5206ad9e3edd2 Mon Sep 17 00:00:00 2001 From: Santosh Kumar Pradhan Date: Tue, 12 Jul 2022 12:31:11 +0200 Subject: [PATCH] RDMA/rtrs-srv: Use per-cpu variables for rdma stats Convert server stat counters from atomic to per-cpu variables. Link: https://lore.kernel.org/r/20220712103113.617754-4-haris.iqbal@ionos.com Signed-off-by: Santosh Kumar Pradhan Signed-off-by: Jack Wang Signed-off-by: Md Haris Iqbal Signed-off-by: Leon Romanovsky --- drivers/infiniband/ulp/rtrs/rtrs-srv-stats.c | 32 +++++++++++++++++++++------- drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c | 2 ++ drivers/infiniband/ulp/rtrs/rtrs-srv.c | 9 +++++++- drivers/infiniband/ulp/rtrs/rtrs-srv.h | 15 +++++++------ 4 files changed, 42 insertions(+), 16 deletions(-) diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv-stats.c b/drivers/infiniband/ulp/rtrs/rtrs-srv-stats.c index 44b1c16..2aff121 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-srv-stats.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-srv-stats.c @@ -14,9 +14,14 @@ int rtrs_srv_reset_rdma_stats(struct rtrs_srv_stats *stats, bool enable) { if (enable) { - struct rtrs_srv_stats_rdma_stats *r = &stats->rdma_stats; + int cpu; + struct rtrs_srv_stats_rdma_stats *r; + + for_each_possible_cpu(cpu) { + r = per_cpu_ptr(stats->rdma_stats, cpu); + memset(r, 0, sizeof(*r)); + } - memset(r, 0, sizeof(*r)); return 0; } @@ -25,11 +30,22 @@ int rtrs_srv_reset_rdma_stats(struct rtrs_srv_stats *stats, bool enable) ssize_t rtrs_srv_stats_rdma_to_str(struct rtrs_srv_stats *stats, char *page) { - struct rtrs_srv_stats_rdma_stats *r = &stats->rdma_stats; + int cpu; + struct rtrs_srv_stats_rdma_stats sum; + struct rtrs_srv_stats_rdma_stats *r; + + memset(&sum, 0, sizeof(sum)); + + for_each_possible_cpu(cpu) { + r = per_cpu_ptr(stats->rdma_stats, cpu); + + sum.dir[READ].cnt += r->dir[READ].cnt; + sum.dir[READ].size_total += r->dir[READ].size_total; + sum.dir[WRITE].cnt += r->dir[WRITE].cnt; + sum.dir[WRITE].size_total += r->dir[WRITE].size_total; + } - return sysfs_emit(page, "%lld %lld %lld %lldn %u\n", - (s64)atomic64_read(&r->dir[READ].cnt), - (s64)atomic64_read(&r->dir[READ].size_total), - (s64)atomic64_read(&r->dir[WRITE].cnt), - (s64)atomic64_read(&r->dir[WRITE].size_total), 0); + return sysfs_emit(page, "%llu %llu %llu %llu\n", + sum.dir[READ].cnt, sum.dir[READ].size_total, + sum.dir[WRITE].cnt, sum.dir[WRITE].size_total); } diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c b/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c index b94ae12..2a3c9ac 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c @@ -220,6 +220,8 @@ static void rtrs_srv_path_stats_release(struct kobject *kobj) stats = container_of(kobj, struct rtrs_srv_stats, kobj_stats); + free_percpu(stats->rdma_stats); + kfree(stats); } diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv.c b/drivers/infiniband/ulp/rtrs/rtrs-srv.c index 24024bc..8278d36 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-srv.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.c @@ -1513,6 +1513,7 @@ static void free_path(struct rtrs_srv_path *srv_path) kobject_del(&srv_path->kobj); kobject_put(&srv_path->kobj); } else { + free_percpu(srv_path->stats->rdma_stats); kfree(srv_path->stats); kfree(srv_path); } @@ -1755,13 +1756,17 @@ static struct rtrs_srv_path *__alloc_path(struct rtrs_srv_sess *srv, if (!srv_path->stats) goto err_free_sess; + srv_path->stats->rdma_stats = alloc_percpu(struct rtrs_srv_stats_rdma_stats); + if (!srv_path->stats->rdma_stats) + goto err_free_stats; + srv_path->stats->srv_path = srv_path; srv_path->dma_addr = kcalloc(srv->queue_depth, sizeof(*srv_path->dma_addr), GFP_KERNEL); if (!srv_path->dma_addr) - goto err_free_stats; + goto err_free_percpu; srv_path->s.con = kcalloc(con_num, sizeof(*srv_path->s.con), GFP_KERNEL); @@ -1813,6 +1818,8 @@ err_free_con: kfree(srv_path->s.con); err_free_dma_addr: kfree(srv_path->dma_addr); +err_free_percpu: + free_percpu(srv_path->stats->rdma_stats); err_free_stats: kfree(srv_path->stats); err_free_sess: diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv.h b/drivers/infiniband/ulp/rtrs/rtrs-srv.h index 6292e87..186a63c 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-srv.h +++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.h @@ -12,6 +12,7 @@ #include #include +#include #include "rtrs-pri.h" /* @@ -29,15 +30,15 @@ enum rtrs_srv_state { */ struct rtrs_srv_stats_rdma_stats { struct { - atomic64_t cnt; - atomic64_t size_total; + u64 cnt; + u64 size_total; } dir[2]; }; struct rtrs_srv_stats { - struct kobject kobj_stats; - struct rtrs_srv_stats_rdma_stats rdma_stats; - struct rtrs_srv_path *srv_path; + struct kobject kobj_stats; + struct rtrs_srv_stats_rdma_stats __percpu *rdma_stats; + struct rtrs_srv_path *srv_path; }; struct rtrs_srv_con { @@ -130,8 +131,8 @@ void close_path(struct rtrs_srv_path *srv_path); static inline void rtrs_srv_update_rdma_stats(struct rtrs_srv_stats *s, size_t size, int d) { - atomic64_inc(&s->rdma_stats.dir[d].cnt); - atomic64_add(size, &s->rdma_stats.dir[d].size_total); + this_cpu_inc(s->rdma_stats->dir[d].cnt); + this_cpu_add(s->rdma_stats->dir[d].size_total, size); } /* functions which are implemented in rtrs-srv-stats.c */ -- 2.7.4