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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: |
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 "tcp.h" |
39 | |
40 | DEFINE_PER_CPU(struct rds_tcp_statistics, rds_tcp_stats) |
41 | ____cacheline_aligned; |
42 | |
43 | static const char const *rds_tcp_stat_names[] = { |
44 | "tcp_data_ready_calls", |
45 | "tcp_write_space_calls", |
46 | "tcp_sndbuf_full", |
47 | "tcp_connect_raced", |
48 | "tcp_listen_closed_stale", |
49 | }; |
50 | |
51 | unsigned int rds_tcp_stats_info_copy(struct rds_info_iterator *iter, |
52 | unsigned int avail) |
53 | { |
54 | struct rds_tcp_statistics stats = {0, }; |
55 | uint64_t *src; |
56 | uint64_t *sum; |
57 | size_t i; |
58 | int cpu; |
59 | |
60 | if (avail < ARRAY_SIZE(rds_tcp_stat_names)) |
61 | goto out; |
62 | |
63 | for_each_online_cpu(cpu) { |
64 | src = (uint64_t *)&(per_cpu(rds_tcp_stats, cpu)); |
65 | sum = (uint64_t *)&stats; |
66 | for (i = 0; i < sizeof(stats) / sizeof(uint64_t); i++) |
67 | *(sum++) += *(src++); |
68 | } |
69 | |
70 | rds_stats_info_copy(iter, (uint64_t *)&stats, rds_tcp_stat_names, |
71 | ARRAY_SIZE(rds_tcp_stat_names)); |
72 | out: |
73 | return ARRAY_SIZE(rds_tcp_stat_names); |
74 | } |
75 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9