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 }