diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/infiniband/ulp/rtrs/rtrs-clt-stats.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt-stats.c b/drivers/infiniband/ulp/rtrs/rtrs-clt-stats.c new file mode 100644 index 000000000..1e6ffafa2 --- /dev/null +++ b/drivers/infiniband/ulp/rtrs/rtrs-clt-stats.c @@ -0,0 +1,198 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * RDMA Transport Layer + * + * Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved. + * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved. + * Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved. + */ +#undef pr_fmt +#define pr_fmt(fmt) KBUILD_MODNAME " L" __stringify(__LINE__) ": " fmt + +#include "rtrs-clt.h" + +void rtrs_clt_update_wc_stats(struct rtrs_clt_con *con) +{ + struct rtrs_clt_path *clt_path = to_clt_path(con->c.path); + struct rtrs_clt_stats *stats = clt_path->stats; + struct rtrs_clt_stats_pcpu *s; + int cpu; + + cpu = raw_smp_processor_id(); + s = get_cpu_ptr(stats->pcpu_stats); + if (con->cpu != cpu) { + s->cpu_migr.to++; + + /* Careful here, override s pointer */ + s = per_cpu_ptr(stats->pcpu_stats, con->cpu); + atomic_inc(&s->cpu_migr.from); + } + put_cpu_ptr(stats->pcpu_stats); +} + +void rtrs_clt_inc_failover_cnt(struct rtrs_clt_stats *stats) +{ + this_cpu_inc(stats->pcpu_stats->rdma.failover_cnt); +} + +int rtrs_clt_stats_migration_from_cnt_to_str(struct rtrs_clt_stats *stats, char *buf) +{ + struct rtrs_clt_stats_pcpu *s; + + size_t used; + int cpu; + + used = 0; + for_each_possible_cpu(cpu) { + s = per_cpu_ptr(stats->pcpu_stats, cpu); + used += sysfs_emit_at(buf, used, "%d ", + atomic_read(&s->cpu_migr.from)); + } + + used += sysfs_emit_at(buf, used, "\n"); + + return used; +} + +int rtrs_clt_stats_migration_to_cnt_to_str(struct rtrs_clt_stats *stats, char *buf) +{ + struct rtrs_clt_stats_pcpu *s; + + size_t used; + int cpu; + + used = 0; + for_each_possible_cpu(cpu) { + s = per_cpu_ptr(stats->pcpu_stats, cpu); + used += sysfs_emit_at(buf, used, "%d ", s->cpu_migr.to); + } + + used += sysfs_emit_at(buf, used, "\n"); + + return used; +} + +int rtrs_clt_stats_reconnects_to_str(struct rtrs_clt_stats *stats, char *buf) +{ + return sysfs_emit(buf, "%d %d\n", stats->reconnects.successful_cnt, + stats->reconnects.fail_cnt); +} + +ssize_t rtrs_clt_stats_rdma_to_str(struct rtrs_clt_stats *stats, char *page) +{ + struct rtrs_clt_stats_rdma sum; + struct rtrs_clt_stats_rdma *r; + int cpu; + + memset(&sum, 0, sizeof(sum)); + + for_each_possible_cpu(cpu) { + r = &per_cpu_ptr(stats->pcpu_stats, cpu)->rdma; + + 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; + sum.failover_cnt += r->failover_cnt; + } + + return sysfs_emit(page, "%llu %llu %llu %llu %u %llu\n", + sum.dir[READ].cnt, sum.dir[READ].size_total, + sum.dir[WRITE].cnt, sum.dir[WRITE].size_total, + atomic_read(&stats->inflight), sum.failover_cnt); +} + +ssize_t rtrs_clt_reset_all_help(struct rtrs_clt_stats *s, char *page) +{ + return sysfs_emit(page, "echo 1 to reset all statistics\n"); +} + +int rtrs_clt_reset_rdma_stats(struct rtrs_clt_stats *stats, bool enable) +{ + struct rtrs_clt_stats_pcpu *s; + int cpu; + + if (!enable) + return -EINVAL; + + for_each_possible_cpu(cpu) { + s = per_cpu_ptr(stats->pcpu_stats, cpu); + memset(&s->rdma, 0, sizeof(s->rdma)); + } + + return 0; +} + +int rtrs_clt_reset_cpu_migr_stats(struct rtrs_clt_stats *stats, bool enable) +{ + struct rtrs_clt_stats_pcpu *s; + int cpu; + + if (!enable) + return -EINVAL; + + for_each_possible_cpu(cpu) { + s = per_cpu_ptr(stats->pcpu_stats, cpu); + memset(&s->cpu_migr, 0, sizeof(s->cpu_migr)); + } + + return 0; +} + +int rtrs_clt_reset_reconnects_stat(struct rtrs_clt_stats *stats, bool enable) +{ + if (!enable) + return -EINVAL; + + memset(&stats->reconnects, 0, sizeof(stats->reconnects)); + + return 0; +} + +int rtrs_clt_reset_all_stats(struct rtrs_clt_stats *s, bool enable) +{ + if (enable) { + rtrs_clt_reset_rdma_stats(s, enable); + rtrs_clt_reset_cpu_migr_stats(s, enable); + rtrs_clt_reset_reconnects_stat(s, enable); + atomic_set(&s->inflight, 0); + return 0; + } + + return -EINVAL; +} + +static inline void rtrs_clt_update_rdma_stats(struct rtrs_clt_stats *stats, + size_t size, int d) +{ + this_cpu_inc(stats->pcpu_stats->rdma.dir[d].cnt); + this_cpu_add(stats->pcpu_stats->rdma.dir[d].size_total, size); +} + +void rtrs_clt_update_all_stats(struct rtrs_clt_io_req *req, int dir) +{ + struct rtrs_clt_con *con = req->con; + struct rtrs_clt_path *clt_path = to_clt_path(con->c.path); + struct rtrs_clt_stats *stats = clt_path->stats; + unsigned int len; + + len = req->usr_len + req->data_len; + rtrs_clt_update_rdma_stats(stats, len, dir); + if (req->mp_policy == MP_POLICY_MIN_INFLIGHT) + atomic_inc(&stats->inflight); +} + +int rtrs_clt_init_stats(struct rtrs_clt_stats *stats) +{ + stats->pcpu_stats = alloc_percpu(typeof(*stats->pcpu_stats)); + if (!stats->pcpu_stats) + return -ENOMEM; + + /* + * successful_cnt will be set to 0 after session + * is established for the first time + */ + stats->reconnects.successful_cnt = -1; + + return 0; +} |