cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ib_stats.c (3181B)

      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
     40DEFINE_PER_CPU_SHARED_ALIGNED(struct rds_ib_statistics, rds_ib_stats);
     41
     42static 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
     84unsigned 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));
    105out:
    106	return ARRAY_SIZE(rds_ib_stat_names);
    107}