On Fri, Feb 21, 2020 at 11:47:03AM +0100, Jack Wang wrote:
> From: Jack Wang <jinpu.wang@xxxxxxxxxxxxxxx>
>
> This introduces set of functions used on client side to account
> statistics of RDMA data sent/received, amount of IOs inflight,
> latency, cpu migrations, etc. Almost all statistics are collected
> using percpu variables.
>
> Signed-off-by: Danil Kipnis <danil.kipnis@xxxxxxxxxxxxxxx>
> Signed-off-by: Jack Wang <jinpu.wang@xxxxxxxxxxxxxxx>
> ---
> drivers/infiniband/ulp/rtrs/rtrs-clt-stats.c | 205 +++++++++++++++++++
> 1 file changed, 205 insertions(+)
> create mode 100644 drivers/infiniband/ulp/rtrs/rtrs-clt-stats.c
>
> 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 000000000000..3f556b884a4e
> --- /dev/null
> +++ b/drivers/infiniband/ulp/rtrs/rtrs-clt-stats.c
> @@ -0,0 +1,205 @@
> +// 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_sess *sess = to_clt_sess(con->c.sess);
> + struct rtrs_clt_stats *stats = &sess->stats;
> + struct rtrs_clt_stats_pcpu *s;
> + int cpu;
> +
> + cpu = raw_smp_processor_id();
> + s = this_cpu_ptr(stats->pcpu_stats);
> + if (unlikely(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);
> + }
> +}
> +
> +void rtrs_clt_inc_failover_cnt(struct rtrs_clt_stats *stats)
> +{
> + struct rtrs_clt_stats_pcpu *s;
> +
> + s = this_cpu_ptr(stats->pcpu_stats);
> + s->rdma.failover_cnt++;
> +}
> +
> +int rtrs_clt_stats_migration_cnt_to_str(struct rtrs_clt_stats *stats,
> + char *buf, size_t len)
> +{
> + struct rtrs_clt_stats_pcpu *s;
> +
> + size_t used;
> + int cpu;
> +
> + used = scnprintf(buf, len, " ");
> + for_each_possible_cpu(cpu)
> + used += scnprintf(buf + used, len - used, " CPU%u", cpu);
> +
> + used += scnprintf(buf + used, len - used, "\nfrom:");
> + for_each_possible_cpu(cpu) {
> + s = per_cpu_ptr(stats->pcpu_stats, cpu);
> + used += scnprintf(buf + used, len - used, " %d",
> + atomic_read(&s->cpu_migr.from));
> + }
> +
> + used += scnprintf(buf + used, len - used, "\nto :");
> + for_each_possible_cpu(cpu) {
> + s = per_cpu_ptr(stats->pcpu_stats, cpu);
> + used += scnprintf(buf + used, len - used, " %d",
> + s->cpu_migr.to);
> + }
> + used += scnprintf(buf + used, len - used, "\n");
> +
> + return used;
> +}
> +
> +int rtrs_clt_stats_reconnects_to_str(struct rtrs_clt_stats *stats, char *buf,
> + size_t len)
> +{
> + return scnprintf(buf, len, "%d %d\n",
> + stats->reconnects.successful_cnt,
> + stats->reconnects.fail_cnt);
How will user know that first value is successful_cnt and second fail_cnt?
> +}
> +
> +ssize_t rtrs_clt_stats_rdma_to_str(struct rtrs_clt_stats *stats,
> + char *page, size_t len)
> +{
> + 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 scnprintf(page, len, "%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);
Same question.
Thanks
