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iw_stats.c
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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:
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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
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22  *
23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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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 "iw.h"
39 
41 
42 static const char *const rds_iw_stat_names[] = {
43  "iw_connect_raced",
44  "iw_listen_closed_stale",
45  "iw_tx_cq_call",
46  "iw_tx_cq_event",
47  "iw_tx_ring_full",
48  "iw_tx_throttle",
49  "iw_tx_sg_mapping_failure",
50  "iw_tx_stalled",
51  "iw_tx_credit_updates",
52  "iw_rx_cq_call",
53  "iw_rx_cq_event",
54  "iw_rx_ring_empty",
55  "iw_rx_refill_from_cq",
56  "iw_rx_refill_from_thread",
57  "iw_rx_alloc_limit",
58  "iw_rx_credit_updates",
59  "iw_ack_sent",
60  "iw_ack_send_failure",
61  "iw_ack_send_delayed",
62  "iw_ack_send_piggybacked",
63  "iw_ack_received",
64  "iw_rdma_mr_alloc",
65  "iw_rdma_mr_free",
66  "iw_rdma_mr_used",
67  "iw_rdma_mr_pool_flush",
68  "iw_rdma_mr_pool_wait",
69  "iw_rdma_mr_pool_depleted",
70 };
71 
72 unsigned int rds_iw_stats_info_copy(struct rds_info_iterator *iter,
73  unsigned int avail)
74 {
75  struct rds_iw_statistics stats = {0, };
76  uint64_t *src;
77  uint64_t *sum;
78  size_t i;
79  int cpu;
80 
81  if (avail < ARRAY_SIZE(rds_iw_stat_names))
82  goto out;
83 
84  for_each_online_cpu(cpu) {
85  src = (uint64_t *)&(per_cpu(rds_iw_stats, cpu));
86  sum = (uint64_t *)&stats;
87  for (i = 0; i < sizeof(stats) / sizeof(uint64_t); i++)
88  *(sum++) += *(src++);
89  }
90 
91  rds_stats_info_copy(iter, (uint64_t *)&stats, rds_iw_stat_names,
92  ARRAY_SIZE(rds_iw_stat_names));
93 out:
94  return ARRAY_SIZE(rds_iw_stat_names);
95 }