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-rw-r--r--net/rds/iw_stats.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/net/rds/iw_stats.c b/net/rds/iw_stats.c
new file mode 100644
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+++ b/net/rds/iw_stats.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2006 Oracle. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+#include <linux/percpu.h>
+#include <linux/seq_file.h>
+#include <linux/proc_fs.h>
+
+#include "rds.h"
+#include "iw.h"
+
+DEFINE_PER_CPU(struct rds_iw_statistics, rds_iw_stats) ____cacheline_aligned;
+
+static char *rds_iw_stat_names[] = {
+ "iw_connect_raced",
+ "iw_listen_closed_stale",
+ "iw_tx_cq_call",
+ "iw_tx_cq_event",
+ "iw_tx_ring_full",
+ "iw_tx_throttle",
+ "iw_tx_sg_mapping_failure",
+ "iw_tx_stalled",
+ "iw_tx_credit_updates",
+ "iw_rx_cq_call",
+ "iw_rx_cq_event",
+ "iw_rx_ring_empty",
+ "iw_rx_refill_from_cq",
+ "iw_rx_refill_from_thread",
+ "iw_rx_alloc_limit",
+ "iw_rx_credit_updates",
+ "iw_ack_sent",
+ "iw_ack_send_failure",
+ "iw_ack_send_delayed",
+ "iw_ack_send_piggybacked",
+ "iw_ack_received",
+ "iw_rdma_mr_alloc",
+ "iw_rdma_mr_free",
+ "iw_rdma_mr_used",
+ "iw_rdma_mr_pool_flush",
+ "iw_rdma_mr_pool_wait",
+ "iw_rdma_mr_pool_depleted",
+};
+
+unsigned int rds_iw_stats_info_copy(struct rds_info_iterator *iter,
+ unsigned int avail)
+{
+ struct rds_iw_statistics stats = {0, };
+ uint64_t *src;
+ uint64_t *sum;
+ size_t i;
+ int cpu;
+
+ if (avail < ARRAY_SIZE(rds_iw_stat_names))
+ goto out;
+
+ for_each_online_cpu(cpu) {
+ src = (uint64_t *)&(per_cpu(rds_iw_stats, cpu));
+ sum = (uint64_t *)&stats;
+ for (i = 0; i < sizeof(stats) / sizeof(uint64_t); i++)
+ *(sum++) += *(src++);
+ }
+
+ rds_stats_info_copy(iter, (uint64_t *)&stats, rds_iw_stat_names,
+ ARRAY_SIZE(rds_iw_stat_names));
+out:
+ return ARRAY_SIZE(rds_iw_stat_names);
+}
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