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/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is included
* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
* GPL HEADER END
*/
/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*
* lnet/klnds/o2iblnd/o2iblnd_modparams.c
*
* Author: Eric Barton <eric@bartonsoftware.com>
*/
#include "o2iblnd.h"
static int service = 987;
module_param(service, int, 0444);
MODULE_PARM_DESC(service, "service number (within RDMA_PS_TCP)");
static int cksum = 0;
module_param(cksum, int, 0644);
MODULE_PARM_DESC(cksum, "set non-zero to enable message (not RDMA) checksums");
static int timeout = 50;
module_param(timeout, int, 0644);
MODULE_PARM_DESC(timeout, "timeout (seconds)");
/* Number of threads in each scheduler pool which is percpt,
* we will estimate reasonable value based on CPUs if it's set to zero. */
static int nscheds;
module_param(nscheds, int, 0444);
MODULE_PARM_DESC(nscheds, "number of threads in each scheduler pool");
/* NB: this value is shared by all CPTs, it can grow at runtime */
static int ntx = 512;
module_param(ntx, int, 0444);
MODULE_PARM_DESC(ntx, "# of message descriptors allocated for each pool");
/* NB: this value is shared by all CPTs */
static int credits = 256;
module_param(credits, int, 0444);
MODULE_PARM_DESC(credits, "# concurrent sends");
static int peer_credits = 8;
module_param(peer_credits, int, 0444);
MODULE_PARM_DESC(peer_credits, "# concurrent sends to 1 peer");
static int peer_credits_hiw = 0;
module_param(peer_credits_hiw, int, 0444);
MODULE_PARM_DESC(peer_credits_hiw, "when eagerly to return credits");
static int peer_buffer_credits = 0;
module_param(peer_buffer_credits, int, 0444);
MODULE_PARM_DESC(peer_buffer_credits, "# per-peer router buffer credits");
static int peer_timeout = 180;
module_param(peer_timeout, int, 0444);
MODULE_PARM_DESC(peer_timeout, "Seconds without aliveness news to declare peer dead (<=0 to disable)");
static char *ipif_name = "ib0";
module_param(ipif_name, charp, 0444);
MODULE_PARM_DESC(ipif_name, "IPoIB interface name");
static int retry_count = 5;
module_param(retry_count, int, 0644);
MODULE_PARM_DESC(retry_count, "Retransmissions when no ACK received");
static int rnr_retry_count = 6;
module_param(rnr_retry_count, int, 0644);
MODULE_PARM_DESC(rnr_retry_count, "RNR retransmissions");
static int keepalive = 100;
module_param(keepalive, int, 0644);
MODULE_PARM_DESC(keepalive, "Idle time in seconds before sending a keepalive");
static int ib_mtu = 0;
module_param(ib_mtu, int, 0444);
MODULE_PARM_DESC(ib_mtu, "IB MTU 256/512/1024/2048/4096");
static int concurrent_sends = 0;
module_param(concurrent_sends, int, 0444);
MODULE_PARM_DESC(concurrent_sends, "send work-queue sizing");
static int map_on_demand = 0;
module_param(map_on_demand, int, 0444);
MODULE_PARM_DESC(map_on_demand, "map on demand");
/* NB: this value is shared by all CPTs, it can grow at runtime */
static int fmr_pool_size = 512;
module_param(fmr_pool_size, int, 0444);
MODULE_PARM_DESC(fmr_pool_size, "size of fmr pool on each CPT (>= ntx / 4)");
/* NB: this value is shared by all CPTs, it can grow at runtime */
static int fmr_flush_trigger = 384;
module_param(fmr_flush_trigger, int, 0444);
MODULE_PARM_DESC(fmr_flush_trigger, "# dirty FMRs that triggers pool flush");
static int fmr_cache = 1;
module_param(fmr_cache, int, 0444);
MODULE_PARM_DESC(fmr_cache, "non-zero to enable FMR caching");
/* NB: this value is shared by all CPTs, it can grow at runtime */
static int pmr_pool_size = 512;
module_param(pmr_pool_size, int, 0444);
MODULE_PARM_DESC(pmr_pool_size, "size of MR cache pmr pool on each CPT");
/*
* 0: disable failover
* 1: enable failover if necessary
* 2: force to failover (for debug)
*/
static int dev_failover = 0;
module_param(dev_failover, int, 0444);
MODULE_PARM_DESC(dev_failover, "HCA failover for bonding (0 off, 1 on, other values reserved)");
static int require_privileged_port = 0;
module_param(require_privileged_port, int, 0644);
MODULE_PARM_DESC(require_privileged_port, "require privileged port when accepting connection");
static int use_privileged_port = 1;
module_param(use_privileged_port, int, 0644);
MODULE_PARM_DESC(use_privileged_port, "use privileged port when initiating connection");
kib_tunables_t kiblnd_tunables = {
.kib_dev_failover = &dev_failover,
.kib_service = &service,
.kib_cksum = &cksum,
.kib_timeout = &timeout,
.kib_keepalive = &keepalive,
.kib_ntx = &ntx,
.kib_credits = &credits,
.kib_peertxcredits = &peer_credits,
.kib_peercredits_hiw = &peer_credits_hiw,
.kib_peerrtrcredits = &peer_buffer_credits,
.kib_peertimeout = &peer_timeout,
.kib_default_ipif = &ipif_name,
.kib_retry_count = &retry_count,
.kib_rnr_retry_count = &rnr_retry_count,
.kib_concurrent_sends = &concurrent_sends,
.kib_ib_mtu = &ib_mtu,
.kib_map_on_demand = &map_on_demand,
.kib_fmr_pool_size = &fmr_pool_size,
.kib_fmr_flush_trigger = &fmr_flush_trigger,
.kib_fmr_cache = &fmr_cache,
.kib_pmr_pool_size = &pmr_pool_size,
.kib_require_priv_port = &require_privileged_port,
.kib_use_priv_port = &use_privileged_port,
.kib_nscheds = &nscheds
};
int
kiblnd_tunables_init (void)
{
if (kiblnd_translate_mtu(*kiblnd_tunables.kib_ib_mtu) < 0) {
CERROR("Invalid ib_mtu %d, expected 256/512/1024/2048/4096\n",
*kiblnd_tunables.kib_ib_mtu);
return -EINVAL;
}
if (*kiblnd_tunables.kib_peertxcredits < IBLND_CREDITS_DEFAULT)
*kiblnd_tunables.kib_peertxcredits = IBLND_CREDITS_DEFAULT;
if (*kiblnd_tunables.kib_peertxcredits > IBLND_CREDITS_MAX)
*kiblnd_tunables.kib_peertxcredits = IBLND_CREDITS_MAX;
if (*kiblnd_tunables.kib_peertxcredits > *kiblnd_tunables.kib_credits)
*kiblnd_tunables.kib_peertxcredits = *kiblnd_tunables.kib_credits;
if (*kiblnd_tunables.kib_peercredits_hiw < *kiblnd_tunables.kib_peertxcredits / 2)
*kiblnd_tunables.kib_peercredits_hiw = *kiblnd_tunables.kib_peertxcredits / 2;
if (*kiblnd_tunables.kib_peercredits_hiw >= *kiblnd_tunables.kib_peertxcredits)
*kiblnd_tunables.kib_peercredits_hiw = *kiblnd_tunables.kib_peertxcredits - 1;
if (*kiblnd_tunables.kib_map_on_demand < 0 ||
*kiblnd_tunables.kib_map_on_demand > IBLND_MAX_RDMA_FRAGS)
*kiblnd_tunables.kib_map_on_demand = 0; /* disable map-on-demand */
if (*kiblnd_tunables.kib_map_on_demand == 1)
*kiblnd_tunables.kib_map_on_demand = 2; /* don't make sense to create map if only one fragment */
if (*kiblnd_tunables.kib_concurrent_sends == 0) {
if (*kiblnd_tunables.kib_map_on_demand > 0 &&
*kiblnd_tunables.kib_map_on_demand <= IBLND_MAX_RDMA_FRAGS / 8)
*kiblnd_tunables.kib_concurrent_sends = (*kiblnd_tunables.kib_peertxcredits) * 2;
else
*kiblnd_tunables.kib_concurrent_sends = (*kiblnd_tunables.kib_peertxcredits);
}
if (*kiblnd_tunables.kib_concurrent_sends > *kiblnd_tunables.kib_peertxcredits * 2)
*kiblnd_tunables.kib_concurrent_sends = *kiblnd_tunables.kib_peertxcredits * 2;
if (*kiblnd_tunables.kib_concurrent_sends < *kiblnd_tunables.kib_peertxcredits / 2)
*kiblnd_tunables.kib_concurrent_sends = *kiblnd_tunables.kib_peertxcredits / 2;
if (*kiblnd_tunables.kib_concurrent_sends < *kiblnd_tunables.kib_peertxcredits) {
CWARN("Concurrent sends %d is lower than message queue size: %d, performance may drop slightly.\n",
*kiblnd_tunables.kib_concurrent_sends, *kiblnd_tunables.kib_peertxcredits);
}
return 0;
}
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