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f4f943c958
For better performance, we split the receive completion IRQ handler. That lets us acknowledge several WCE events in one call. We also limit the WC to max 32 to avoid latency. Acknowledging several completions in one call instead of several calls each time will provide better performance since less mutual exclusion locks are being performed. In next patch, send completion is also split which re-uses the poll_cq() and hence the code is moved to ib_cm.c Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
98 lines
2.9 KiB
C
98 lines
2.9 KiB
C
/*
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* Copyright (c) 2006 Oracle. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#include <linux/percpu.h>
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#include <linux/seq_file.h>
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#include <linux/proc_fs.h>
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#include "rds.h"
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#include "ib.h"
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DEFINE_PER_CPU_SHARED_ALIGNED(struct rds_ib_statistics, rds_ib_stats);
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static const char *const rds_ib_stat_names[] = {
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"ib_connect_raced",
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"ib_listen_closed_stale",
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"s_ib_evt_handler_call",
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"ib_tx_cq_call",
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"ib_tasklet_call",
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"ib_tx_cq_event",
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"ib_tx_ring_full",
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"ib_tx_throttle",
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"ib_tx_sg_mapping_failure",
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"ib_tx_stalled",
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"ib_tx_credit_updates",
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"ib_rx_cq_event",
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"ib_rx_ring_empty",
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"ib_rx_refill_from_cq",
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"ib_rx_refill_from_thread",
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"ib_rx_alloc_limit",
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"ib_rx_credit_updates",
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"ib_ack_sent",
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"ib_ack_send_failure",
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"ib_ack_send_delayed",
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"ib_ack_send_piggybacked",
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"ib_ack_received",
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"ib_rdma_mr_alloc",
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"ib_rdma_mr_free",
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"ib_rdma_mr_used",
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"ib_rdma_mr_pool_flush",
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"ib_rdma_mr_pool_wait",
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"ib_rdma_mr_pool_depleted",
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"ib_atomic_cswp",
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"ib_atomic_fadd",
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};
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unsigned int rds_ib_stats_info_copy(struct rds_info_iterator *iter,
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unsigned int avail)
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{
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struct rds_ib_statistics stats = {0, };
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uint64_t *src;
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uint64_t *sum;
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size_t i;
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int cpu;
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if (avail < ARRAY_SIZE(rds_ib_stat_names))
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goto out;
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for_each_online_cpu(cpu) {
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src = (uint64_t *)&(per_cpu(rds_ib_stats, cpu));
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sum = (uint64_t *)&stats;
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for (i = 0; i < sizeof(stats) / sizeof(uint64_t); i++)
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*(sum++) += *(src++);
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}
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rds_stats_info_copy(iter, (uint64_t *)&stats, rds_ib_stat_names,
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ARRAY_SIZE(rds_ib_stat_names));
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out:
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return ARRAY_SIZE(rds_ib_stat_names);
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}
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