projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 70041088 AG |
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 | ||
| 3e878b8d | 43 | static const char * const rds_tcp_stat_names[] = { |
| 70041088 AG |
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 | } |