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_tx_cq_call", 46 "ib_tx_cq_event", 47 "ib_tx_ring_full", 48 "ib_tx_throttle", 49 "ib_tx_sg_mapping_failure", 50 "ib_tx_stalled", 51 "ib_tx_credit_updates", 52 "ib_rx_cq_call", 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_credit_updates", 59 "ib_ack_sent", 60 "ib_ack_send_failure", 61 "ib_ack_send_delayed", 62 "ib_ack_send_piggybacked", 63 "ib_ack_received", 64 "ib_rdma_mr_alloc", 65 "ib_rdma_mr_free", 66 "ib_rdma_mr_used", 67 "ib_rdma_mr_pool_flush", 68 "ib_rdma_mr_pool_wait", 69 "ib_rdma_mr_pool_depleted", 70 "ib_atomic_cswp", 71 "ib_atomic_fadd", 72 }; 73 74 unsigned int rds_ib_stats_info_copy(struct rds_info_iterator *iter, 75 unsigned int avail) 76 { 77 struct rds_ib_statistics stats = {0, }; 78 uint64_t *src; 79 uint64_t *sum; 80 size_t i; 81 int cpu; 82 83 if (avail < ARRAY_SIZE(rds_ib_stat_names)) 84 goto out; 85 86 for_each_online_cpu(cpu) { 87 src = (uint64_t *)&(per_cpu(rds_ib_stats, cpu)); 88 sum = (uint64_t *)&stats; 89 for (i = 0; i < sizeof(stats) / sizeof(uint64_t); i++) 90 *(sum++) += *(src++); 91 } 92 93 rds_stats_info_copy(iter, (uint64_t *)&stats, rds_ib_stat_names, 94 ARRAY_SIZE(rds_ib_stat_names)); 95 out: 96 return ARRAY_SIZE(rds_ib_stat_names); 97 } 98