1 /* 2 * Copyright (c) 2006 Oracle. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 * 32 */ 33 #include <linux/percpu.h> 34 #include <linux/seq_file.h> 35 #include <linux/proc_fs.h> 36 37 #include "rds.h" 38 #include "ib.h" 39 40 DEFINE_PER_CPU_SHARED_ALIGNED(struct rds_ib_statistics, rds_ib_stats); 41 42 static const char *const rds_ib_stat_names[] = { 43 "ib_connect_raced", 44 "ib_listen_closed_stale", 45 "ib_evt_handler_call", 46 "ib_tasklet_call", 47 "ib_tx_cq_event", 48 "ib_tx_ring_full", 49 "ib_tx_throttle", 50 "ib_tx_sg_mapping_failure", 51 "ib_tx_stalled", 52 "ib_tx_credit_updates", 53 "ib_rx_cq_event", 54 "ib_rx_ring_empty", 55 "ib_rx_refill_from_cq", 56 "ib_rx_refill_from_thread", 57 "ib_rx_alloc_limit", 58 "ib_rx_total_frags", 59 "ib_rx_total_incs", 60 "ib_rx_credit_updates", 61 "ib_ack_sent", 62 "ib_ack_send_failure", 63 "ib_ack_send_delayed", 64 "ib_ack_send_piggybacked", 65 "ib_ack_received", 66 "ib_rdma_mr_8k_alloc", 67 "ib_rdma_mr_8k_free", 68 "ib_rdma_mr_8k_used", 69 "ib_rdma_mr_8k_pool_flush", 70 "ib_rdma_mr_8k_pool_wait", 71 "ib_rdma_mr_8k_pool_depleted", 72 "ib_rdma_mr_1m_alloc", 73 "ib_rdma_mr_1m_free", 74 "ib_rdma_mr_1m_used", 75 "ib_rdma_mr_1m_pool_flush", 76 "ib_rdma_mr_1m_pool_wait", 77 "ib_rdma_mr_1m_pool_depleted", 78 "ib_rdma_mr_8k_reused", 79 "ib_rdma_mr_1m_reused", 80 "ib_atomic_cswp", 81 "ib_atomic_fadd", 82 }; 83 84 unsigned int rds_ib_stats_info_copy(struct rds_info_iterator *iter, 85 unsigned int avail) 86 { 87 struct rds_ib_statistics stats = {0, }; 88 uint64_t *src; 89 uint64_t *sum; 90 size_t i; 91 int cpu; 92 93 if (avail < ARRAY_SIZE(rds_ib_stat_names)) 94 goto out; 95 96 for_each_online_cpu(cpu) { 97 src = (uint64_t *)&(per_cpu(rds_ib_stats, cpu)); 98 sum = (uint64_t *)&stats; 99 for (i = 0; i < sizeof(stats) / sizeof(uint64_t); i++) 100 *(sum++) += *(src++); 101 } 102 103 rds_stats_info_copy(iter, (uint64_t *)&stats, rds_ib_stat_names, 104 ARRAY_SIZE(rds_ib_stat_names)); 105 out: 106 return ARRAY_SIZE(rds_ib_stat_names); 107 } 108