From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F3AB9C48BE5 for ; Thu, 20 Jun 2019 15:03:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BF79C2084A for ; Thu, 20 Jun 2019 15:03:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ZR4ksTHp" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732022AbfFTPDw (ORCPT ); Thu, 20 Jun 2019 11:03:52 -0400 Received: from mail-ed1-f68.google.com ([209.85.208.68]:38915 "EHLO mail-ed1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726697AbfFTPDv (ORCPT ); Thu, 20 Jun 2019 11:03:51 -0400 Received: by mail-ed1-f68.google.com with SMTP id m10so5180387edv.6; Thu, 20 Jun 2019 08:03:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=nN/SPqvz2GF+Oj09y4C8bBKnYACCBXPwfJrDApcygOc=; b=ZR4ksTHpfK75drVQAHRWKUMAOlpE7+Df3LmsMp+NUTDNpjiGrn7Qq+C3Hm9zkheZ7z 82vRwQ4vmaaQ0j9C1L9MjEMJVEDB/vt6S+YM5RpVx6jJIUwvkd+63YTq37P5+Id7/0/W 8mst8pJ7Aruic3kCwkxascxWlTbyeOVMvxz27owv5q8ABexVILrkycLaYZqZZeAkM3ap 13ebGhQpU/mSfV3xp+y7uk4fL+vQXghVxVmUS0qFCnMAzPtXq/L7p7F1sz5/XCHnmpz/ YslHpCxqx4sh2CrgvQrrEm1K++JzRqx7OrYomUg2k8iMlaY51MdL5wgeavuNAYIN/4VM Wb9g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=nN/SPqvz2GF+Oj09y4C8bBKnYACCBXPwfJrDApcygOc=; b=FCZ9G3njaD117D7CkBii6b1HJMNlKs2UuOX/GvR9Nw4LQEsLr291fEbujGwo03dT5G ZlgUdYruz3bQhOudewVZucJFwxhXZAS+6yxXJTPKmicHNyXBVeNpWdiWxys33HRKZQvl DECRfgPcVqCCHkFBaWU6udA58KNLfe9AvCIeVmHVQ5TdgZxk1yINIbsjun3M1SyU9UpP XKe77t+E3Rws+JvwC+1XLo7c6NW56cVApcncLPYmQqtK2aLLuChKRfvR7DslqY4INMyA 6wLjU4cdLqKPRWr7CoNm+PZvN+8aQd5S8EjSE4sxq96I7bi0K4ZKTlEOXeHdz60HRmtU 9Ikw== X-Gm-Message-State: APjAAAWOcTSFYhAB4DTMMjOnObXKlyd4wSpqqVaYB+LYuxiHLLDieqlB 99Q/enmNU1vK0rhaJLEVTyVUotRMSDE= X-Google-Smtp-Source: APXvYqx3GJCvziEbpvqjaAtpPmoNYUXIbPB1gXi/5kpsIh8/rd8ylDvNvZX4DFFr2qKdo+vex8mnig== X-Received: by 2002:a50:9468:: with SMTP id q37mr11194488eda.163.1561043028754; Thu, 20 Jun 2019 08:03:48 -0700 (PDT) Received: from jwang-Latitude-5491.pb.local ([62.217.45.26]) by smtp.gmail.com with ESMTPSA id a20sm3855817ejj.21.2019.06.20.08.03.47 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Thu, 20 Jun 2019 08:03:48 -0700 (PDT) From: Jack Wang To: linux-block@vger.kernel.org, linux-rdma@vger.kernel.org Cc: axboe@kernel.dk, hch@infradead.org, sagi@grimberg.me, bvanassche@acm.org, jgg@mellanox.com, dledford@redhat.com, danil.kipnis@cloud.ionos.com, rpenyaev@suse.de, Roman Pen , Jack Wang Subject: [PATCH v4 07/25] ibtrs: client: statistics functions Date: Thu, 20 Jun 2019 17:03:19 +0200 Message-Id: <20190620150337.7847-8-jinpuwang@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190620150337.7847-1-jinpuwang@gmail.com> References: <20190620150337.7847-1-jinpuwang@gmail.com> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Roman Pen 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 is collected using percpu variables. Signed-off-by: Danil Kipnis Signed-off-by: Jack Wang --- .../infiniband/ulp/ibtrs/ibtrs-clt-stats.c | 447 ++++++++++++++++++ 1 file changed, 447 insertions(+) create mode 100644 drivers/infiniband/ulp/ibtrs/ibtrs-clt-stats.c diff --git a/drivers/infiniband/ulp/ibtrs/ibtrs-clt-stats.c b/drivers/infiniband/ulp/ibtrs/ibtrs-clt-stats.c new file mode 100644 index 000000000000..fbeb1549aaf4 --- /dev/null +++ b/drivers/infiniband/ulp/ibtrs/ibtrs-clt-stats.c @@ -0,0 +1,447 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * InfiniBand Transport Layer + * + * Copyright (c) 2014 - 2017 ProfitBricks GmbH. All rights reserved. + * Authors: Fabian Holler + * Jack Wang + * Kleber Souza + * Danil Kipnis + * Roman Penyaev + * Milind Dumbare + * + * Copyright (c) 2017 - 2018 ProfitBricks GmbH. All rights reserved. + * Authors: Danil Kipnis + * Roman Penyaev + * + * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved. + * Authors: Roman Penyaev + * Jack Wang + * Danil Kipnis + */ + +#undef pr_fmt +#define pr_fmt(fmt) KBUILD_MODNAME " L" __stringify(__LINE__) ": " fmt + +#include "ibtrs-clt.h" + +static inline int ibtrs_clt_ms_to_id(unsigned long ms) +{ + int id = ms ? ilog2(ms) - MIN_LOG_LAT + 1 : 0; + + return clamp(id, 0, LOG_LAT_SZ - 1); +} + +void ibtrs_clt_update_rdma_lat(struct ibtrs_clt_stats *stats, bool read, + unsigned long ms) +{ + struct ibtrs_clt_stats_pcpu *s; + int id; + + id = ibtrs_clt_ms_to_id(ms); + s = this_cpu_ptr(stats->pcpu_stats); + if (read) { + s->rdma_lat_distr[id].read++; + if (s->rdma_lat_max.read < ms) + s->rdma_lat_max.read = ms; + } else { + s->rdma_lat_distr[id].write++; + if (s->rdma_lat_max.write < ms) + s->rdma_lat_max.write = ms; + } +} + +void ibtrs_clt_decrease_inflight(struct ibtrs_clt_stats *stats) +{ + atomic_dec(&stats->inflight); +} + +void ibtrs_clt_update_wc_stats(struct ibtrs_clt_con *con) +{ + struct ibtrs_clt_sess *sess = to_clt_sess(con->c.sess); + struct ibtrs_clt_stats *stats = &sess->stats; + struct ibtrs_clt_stats_pcpu *s; + int cpu; + + cpu = raw_smp_processor_id(); + s = this_cpu_ptr(stats->pcpu_stats); + s->wc_comp.cnt++; + s->wc_comp.total_cnt++; + 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 ibtrs_clt_inc_failover_cnt(struct ibtrs_clt_stats *stats) +{ + struct ibtrs_clt_stats_pcpu *s; + + s = this_cpu_ptr(stats->pcpu_stats); + s->rdma.failover_cnt++; +} + +static inline u32 ibtrs_clt_stats_get_avg_wc_cnt(struct ibtrs_clt_stats *stats) +{ + u32 cnt = 0; + u64 sum = 0; + int cpu; + + for_each_possible_cpu(cpu) { + struct ibtrs_clt_stats_pcpu *s; + + s = per_cpu_ptr(stats->pcpu_stats, cpu); + sum += s->wc_comp.total_cnt; + cnt += s->wc_comp.cnt; + } + + return cnt ? sum / cnt : 0; +} + +int ibtrs_clt_stats_wc_completion_to_str(struct ibtrs_clt_stats *stats, + char *buf, size_t len) +{ + return scnprintf(buf, len, "%u\n", + ibtrs_clt_stats_get_avg_wc_cnt(stats)); +} + +ssize_t ibtrs_clt_stats_rdma_lat_distr_to_str(struct ibtrs_clt_stats *stats, + char *page, size_t len) +{ + struct ibtrs_clt_stats_rdma_lat res[LOG_LAT_SZ]; + struct ibtrs_clt_stats_rdma_lat max; + struct ibtrs_clt_stats_pcpu *s; + + ssize_t cnt = 0; + int i, cpu; + + max.write = 0; + max.read = 0; + for_each_possible_cpu(cpu) { + s = per_cpu_ptr(stats->pcpu_stats, cpu); + + if (max.write < s->rdma_lat_max.write) + max.write = s->rdma_lat_max.write; + if (max.read < s->rdma_lat_max.read) + max.read = s->rdma_lat_max.read; + } + for (i = 0; i < ARRAY_SIZE(res); i++) { + res[i].write = 0; + res[i].read = 0; + for_each_possible_cpu(cpu) { + s = per_cpu_ptr(stats->pcpu_stats, cpu); + + res[i].write += s->rdma_lat_distr[i].write; + res[i].read += s->rdma_lat_distr[i].read; + } + } + + for (i = 0; i < ARRAY_SIZE(res) - 1; i++) + cnt += scnprintf(page + cnt, len - cnt, + "< %6d ms: %llu %llu\n", + 1 << (i + MIN_LOG_LAT), res[i].read, + res[i].write); + cnt += scnprintf(page + cnt, len - cnt, ">= %5d ms: %llu %llu\n", + 1 << (i - 1 + MIN_LOG_LAT), res[i].read, + res[i].write); + cnt += scnprintf(page + cnt, len - cnt, " maximum ms: %llu %llu\n", + max.read, max.write); + + return cnt; +} + +int ibtrs_clt_stats_migration_cnt_to_str(struct ibtrs_clt_stats *stats, + char *buf, size_t len) +{ + struct ibtrs_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 ibtrs_clt_stats_reconnects_to_str(struct ibtrs_clt_stats *stats, char *buf, + size_t len) +{ + return scnprintf(buf, len, "%d %d\n", + stats->reconnects.successful_cnt, + stats->reconnects.fail_cnt); +} + +ssize_t ibtrs_clt_stats_rdma_to_str(struct ibtrs_clt_stats *stats, + char *page, size_t len) +{ + struct ibtrs_clt_stats_rdma sum; + struct ibtrs_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); +} + +int ibtrs_clt_stats_sg_list_distr_to_str(struct ibtrs_clt_stats *stats, + char *buf, size_t len) +{ + struct ibtrs_clt_stats_pcpu *s; + + int i, cpu, cnt; + + cnt = scnprintf(buf, len, "n\\cpu:"); + for_each_possible_cpu(cpu) + cnt += scnprintf(buf + cnt, len - cnt, "%5d", cpu); + + for (i = 0; i < SG_DISTR_SZ; i++) { + if (i <= MAX_LIN_SG) + cnt += scnprintf(buf + cnt, len - cnt, "\n= %3d:", i); + else if (i < SG_DISTR_SZ - 1) + cnt += scnprintf(buf + cnt, len - cnt, "\n< %3d:", + 1 << (i + MIN_LOG_SG - MAX_LIN_SG)); + else + cnt += scnprintf(buf + cnt, len - cnt, "\n>=%3d:", + 1 << (i + MIN_LOG_SG - + MAX_LIN_SG - 1)); + + for_each_possible_cpu(cpu) { + unsigned int p, p_i, p_f; + u64 total, distr; + + s = per_cpu_ptr(stats->pcpu_stats, cpu); + total = s->sg_list_total; + distr = s->sg_list_distr[i]; + + p = total ? distr * 1000 / total : 0; + p_i = p / 10; + p_f = p % 10; + + if (distr) + cnt += scnprintf(buf + cnt, len - cnt, + " %2u.%01u", p_i, p_f); + else + cnt += scnprintf(buf + cnt, len - cnt, " 0"); + } + } + + cnt += scnprintf(buf + cnt, len - cnt, "\ntotal:"); + for_each_possible_cpu(cpu) { + s = per_cpu_ptr(stats->pcpu_stats, cpu); + cnt += scnprintf(buf + cnt, len - cnt, " %llu", + s->sg_list_total); + } + cnt += scnprintf(buf + cnt, len - cnt, "\n"); + + return cnt; +} + +ssize_t ibtrs_clt_reset_all_help(struct ibtrs_clt_stats *s, + char *page, size_t len) +{ + return scnprintf(page, len, "echo 1 to reset all statistics\n"); +} + +int ibtrs_clt_reset_rdma_stats(struct ibtrs_clt_stats *stats, bool enable) +{ + struct ibtrs_clt_stats_pcpu *s; + int cpu; + + if (unlikely(!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 ibtrs_clt_reset_rdma_lat_distr_stats(struct ibtrs_clt_stats *stats, + bool enable) +{ + struct ibtrs_clt_stats_pcpu *s; + int cpu; + + if (enable) { + for_each_possible_cpu(cpu) { + s = per_cpu_ptr(stats->pcpu_stats, cpu); + memset(&s->rdma_lat_max, 0, sizeof(s->rdma_lat_max)); + memset(&s->rdma_lat_distr, 0, + sizeof(s->rdma_lat_distr)); + } + } + stats->enable_rdma_lat = enable; + + return 0; +} + +int ibtrs_clt_reset_sg_list_distr_stats(struct ibtrs_clt_stats *stats, + bool enable) +{ + struct ibtrs_clt_stats_pcpu *s; + int cpu; + + if (unlikely(!enable)) + return -EINVAL; + + for_each_possible_cpu(cpu) { + s = per_cpu_ptr(stats->pcpu_stats, cpu); + memset(&s->sg_list_total, 0, sizeof(s->sg_list_total)); + memset(&s->sg_list_distr, 0, sizeof(s->sg_list_distr)); + } + + return 0; +} + +int ibtrs_clt_reset_cpu_migr_stats(struct ibtrs_clt_stats *stats, bool enable) +{ + struct ibtrs_clt_stats_pcpu *s; + int cpu; + + if (unlikely(!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 ibtrs_clt_reset_reconnects_stat(struct ibtrs_clt_stats *stats, bool enable) +{ + if (unlikely(!enable)) + return -EINVAL; + + memset(&stats->reconnects, 0, sizeof(stats->reconnects)); + + return 0; +} + +int ibtrs_clt_reset_wc_comp_stats(struct ibtrs_clt_stats *stats, bool enable) +{ + struct ibtrs_clt_stats_pcpu *s; + int cpu; + + if (unlikely(!enable)) + return -EINVAL; + + for_each_possible_cpu(cpu) { + s = per_cpu_ptr(stats->pcpu_stats, cpu); + memset(&s->wc_comp, 0, sizeof(s->wc_comp)); + } + + return 0; +} + +int ibtrs_clt_reset_all_stats(struct ibtrs_clt_stats *s, bool enable) +{ + if (enable) { + ibtrs_clt_reset_rdma_stats(s, enable); + ibtrs_clt_reset_rdma_lat_distr_stats(s, enable); + ibtrs_clt_reset_sg_list_distr_stats(s, enable); + ibtrs_clt_reset_cpu_migr_stats(s, enable); + ibtrs_clt_reset_reconnects_stat(s, enable); + ibtrs_clt_reset_wc_comp_stats(s, enable); + atomic_set(&s->inflight, 0); + return 0; + } + + return -EINVAL; +} + +static inline void ibtrs_clt_record_sg_distr(u64 stat[SG_DISTR_SZ], u64 *total, + unsigned int cnt) +{ + int i; + + i = cnt > MAX_LIN_SG ? ilog2(cnt) + MAX_LIN_SG - MIN_LOG_SG + 1 : cnt; + i = i < SG_DISTR_SZ ? i : SG_DISTR_SZ - 1; + + stat[i]++; + (*total)++; +} + +static inline void ibtrs_clt_update_rdma_stats(struct ibtrs_clt_stats *stats, + size_t size, int d) +{ + struct ibtrs_clt_stats_pcpu *s; + + s = this_cpu_ptr(stats->pcpu_stats); + s->rdma.dir[d].cnt++; + s->rdma.dir[d].size_total += size; +} + +void ibtrs_clt_update_all_stats(struct ibtrs_clt_io_req *req, int dir) +{ + struct ibtrs_clt_con *con = req->con; + struct ibtrs_clt_sess *sess = to_clt_sess(con->c.sess); + struct ibtrs_clt_stats *stats = &sess->stats; + unsigned int len; + + struct ibtrs_clt_stats_pcpu *s; + + s = this_cpu_ptr(stats->pcpu_stats); + ibtrs_clt_record_sg_distr(s->sg_list_distr, &s->sg_list_total, + req->sg_cnt); + len = req->usr_len + req->data_len; + ibtrs_clt_update_rdma_stats(stats, len, dir); + atomic_inc(&stats->inflight); +} + +int ibtrs_clt_init_stats(struct ibtrs_clt_stats *stats) +{ + stats->enable_rdma_lat = false; + stats->pcpu_stats = alloc_percpu(typeof(*stats->pcpu_stats)); + if (unlikely(!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; +} + +void ibtrs_clt_free_stats(struct ibtrs_clt_stats *stats) +{ + free_percpu(stats->pcpu_stats); +} -- 2.17.1