lnet/klnds/o2iblnd/o2iblnd_modparams.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2012, 2016, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lnet/klnds/o2iblnd/o2iblnd_modparams.c
  33  *
  34  * Author: Eric Barton <eric@bartonsoftware.com>
  35  */
  36
  37 #include "o2iblnd.h"
  38
  39 #define CURRENT_LND_VERSION 1
  40
  41 static int service = 987;
  42 module_param(service, int, 0444);
  43 MODULE_PARM_DESC(service, "service number (within RDMA_PS_TCP)");
  44
  45 static int cksum = 0;
  46 module_param(cksum, int, 0644);
  47 MODULE_PARM_DESC(cksum, "set non-zero to enable message (not RDMA) checksums");
  48
  49 static int timeout = 50;
  50 module_param(timeout, int, 0644);
  51 MODULE_PARM_DESC(timeout, "timeout (seconds)");
  52
  53 /* Number of threads in each scheduler pool which is percpt,
  54  * we will estimate reasonable value based on CPUs if it's set to zero. */
  55 static int nscheds;
  56 module_param(nscheds, int, 0444);
  57 MODULE_PARM_DESC(nscheds, "number of threads in each scheduler pool");
  58
  59 static unsigned int conns_per_peer = 1;
  60 module_param(conns_per_peer, uint, 0444);
  61 MODULE_PARM_DESC(conns_per_peer, "number of connections per peer");
  62
  63 /* NB: this value is shared by all CPTs, it can grow at runtime */
  64 static int ntx = 512;
  65 module_param(ntx, int, 0444);
  66 MODULE_PARM_DESC(ntx, "# of message descriptors allocated for each pool");
  67
  68 /* NB: this value is shared by all CPTs */
  69 static int credits = 256;
  70 module_param(credits, int, 0444);
  71 MODULE_PARM_DESC(credits, "# concurrent sends");
  72
  73 static int peer_credits = 8;
  74 module_param(peer_credits, int, 0444);
  75 MODULE_PARM_DESC(peer_credits, "# concurrent sends to 1 peer");
  76
  77 static int peer_credits_hiw = 0;
  78 module_param(peer_credits_hiw, int, 0444);
  79 MODULE_PARM_DESC(peer_credits_hiw, "when eagerly to return credits");
  80
  81 static int peer_buffer_credits = 0;
  82 module_param(peer_buffer_credits, int, 0444);
  83 MODULE_PARM_DESC(peer_buffer_credits, "# per-peer router buffer credits");
  84
  85 static int peer_timeout = DEFAULT_PEER_TIMEOUT;
  86 module_param(peer_timeout, int, 0444);
  87 MODULE_PARM_DESC(peer_timeout, "Seconds without aliveness news to declare peer dead (<=0 to disable)");
  88
  89 static char *ipif_name = "ib0";
  90 module_param(ipif_name, charp, 0444);
  91 MODULE_PARM_DESC(ipif_name, "IPoIB interface name");
  92
  93 static int retry_count = 5;
  94 module_param(retry_count, int, 0644);
  95 MODULE_PARM_DESC(retry_count, "Retransmissions when no ACK received");
  96
  97 static int rnr_retry_count = 6;
  98 module_param(rnr_retry_count, int, 0644);
  99 MODULE_PARM_DESC(rnr_retry_count, "RNR retransmissions");
 100
 101 static int keepalive = 100;
 102 module_param(keepalive, int, 0644);
 103 MODULE_PARM_DESC(keepalive, "Idle time in seconds before sending a keepalive");
 104
 105 static int ib_mtu;
 106 module_param(ib_mtu, int, 0444);
 107 MODULE_PARM_DESC(ib_mtu, "IB MTU 256/512/1024/2048/4096");
 108
 109 static int concurrent_sends;
 110 module_param(concurrent_sends, int, 0444);
 111 MODULE_PARM_DESC(concurrent_sends, "send work-queue sizing");
 112
 113 #ifdef HAVE_IB_GET_DMA_MR
 114 #define IBLND_DEFAULT_MAP_ON_DEMAND 0
 115 #define IBLND_MIN_MAP_ON_DEMAND 0
 116 #else
 117 #define IBLND_DEFAULT_MAP_ON_DEMAND IBLND_MAX_RDMA_FRAGS
 118 #define IBLND_MIN_MAP_ON_DEMAND 1
 119 #endif
 120 static int map_on_demand = IBLND_DEFAULT_MAP_ON_DEMAND;
 121 module_param(map_on_demand, int, 0444);
 122 MODULE_PARM_DESC(map_on_demand, "map on demand");
 123
 124 /* NB: this value is shared by all CPTs, it can grow at runtime */
 125 static int fmr_pool_size = 512;
 126 module_param(fmr_pool_size, int, 0444);
 127 MODULE_PARM_DESC(fmr_pool_size, "size of fmr pool on each CPT (>= ntx / 4)");
 128
 129 /* NB: this value is shared by all CPTs, it can grow at runtime */
 130 static int fmr_flush_trigger = 384;
 131 module_param(fmr_flush_trigger, int, 0444);
 132 MODULE_PARM_DESC(fmr_flush_trigger, "# dirty FMRs that triggers pool flush");
 133
 134 static int fmr_cache = 1;
 135 module_param(fmr_cache, int, 0444);
 136 MODULE_PARM_DESC(fmr_cache, "non-zero to enable FMR caching");
 137
 138 /*
 139  * 0: disable failover
 140  * 1: enable failover if necessary
 141  * 2: force to failover (for debug)
 142  */
 143 static int dev_failover = 0;
 144 module_param(dev_failover, int, 0444);
 145 MODULE_PARM_DESC(dev_failover, "HCA failover for bonding (0 off, 1 on, other values reserved)");
 146
 147 static int require_privileged_port;
 148 module_param(require_privileged_port, int, 0644);
 149 MODULE_PARM_DESC(require_privileged_port, "require privileged port when accepting connection");
 150
 151 static int use_privileged_port = 1;
 152 module_param(use_privileged_port, int, 0644);
 153 MODULE_PARM_DESC(use_privileged_port, "use privileged port when initiating connection");
 154
 155 static unsigned int wrq_sge = 2;
 156 module_param(wrq_sge, uint, 0444);
 157 MODULE_PARM_DESC(wrq_sge, "# scatter/gather element per work request");
 158
 159 kib_tunables_t kiblnd_tunables = {
 160         .kib_dev_failover           = &dev_failover,
 161         .kib_service                = &service,
 162         .kib_cksum                  = &cksum,
 163         .kib_timeout                = &timeout,
 164         .kib_keepalive              = &keepalive,
 165         .kib_default_ipif           = &ipif_name,
 166         .kib_retry_count            = &retry_count,
 167         .kib_rnr_retry_count        = &rnr_retry_count,
 168         .kib_ib_mtu                 = &ib_mtu,
 169         .kib_require_priv_port      = &require_privileged_port,
 170         .kib_use_priv_port          = &use_privileged_port,
 171         .kib_nscheds                = &nscheds,
 172         .kib_wrq_sge                = &wrq_sge,
 173 };
 174
 175 static struct lnet_ioctl_config_o2iblnd_tunables default_tunables;
 176
 177 /* # messages/RDMAs in-flight */
 178 int
 179 kiblnd_msg_queue_size(int version, struct lnet_ni *ni)
 180 {
 181         if (version == IBLND_MSG_VERSION_1)
 182                 return IBLND_MSG_QUEUE_SIZE_V1;
 183         else if (ni)
 184                 return ni->ni_net->net_tunables.lct_peer_tx_credits;
 185         else
 186                 return peer_credits;
 187 }
 188
 189 int
 190 kiblnd_tunables_setup(struct lnet_ni *ni)
 191 {
 192         struct lnet_ioctl_config_o2iblnd_tunables *tunables;
 193         struct lnet_ioctl_config_lnd_cmn_tunables *net_tunables;
 194
 195         /*
 196          * if there was no tunables specified, setup the tunables to be
 197          * defaulted
 198          */
 199         if (!ni->ni_lnd_tunables_set)
 200                 memcpy(&ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib,
 201                        &default_tunables, sizeof(*tunables));
 202
 203         tunables = &ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib;
 204
 205         /* Current API version */
 206         tunables->lnd_version = CURRENT_LND_VERSION;
 207
 208         if (kiblnd_translate_mtu(*kiblnd_tunables.kib_ib_mtu) < 0) {
 209                 CERROR("Invalid ib_mtu %d, expected 256/512/1024/2048/4096\n",
 210                        *kiblnd_tunables.kib_ib_mtu);
 211                 return -EINVAL;
 212         }
 213
 214         net_tunables = &ni->ni_net->net_tunables;
 215
 216         if (net_tunables->lct_peer_timeout == -1)
 217                 net_tunables->lct_peer_timeout = peer_timeout;
 218
 219         if (net_tunables->lct_max_tx_credits == -1)
 220                 net_tunables->lct_max_tx_credits = credits;
 221
 222         if (net_tunables->lct_peer_tx_credits == -1)
 223                 net_tunables->lct_peer_tx_credits = peer_credits;
 224
 225         if (net_tunables->lct_peer_rtr_credits == -1)
 226                 net_tunables->lct_peer_rtr_credits = peer_buffer_credits;
 227
 228         if (net_tunables->lct_peer_tx_credits < IBLND_CREDITS_DEFAULT)
 229                 net_tunables->lct_peer_tx_credits = IBLND_CREDITS_DEFAULT;
 230
 231         if (net_tunables->lct_peer_tx_credits > IBLND_CREDITS_MAX)
 232                 net_tunables->lct_peer_tx_credits = IBLND_CREDITS_MAX;
 233
 234         if (net_tunables->lct_peer_tx_credits >
 235             net_tunables->lct_max_tx_credits)
 236                 net_tunables->lct_peer_tx_credits =
 237                         net_tunables->lct_max_tx_credits;
 238
 239         if (!tunables->lnd_peercredits_hiw)
 240                 tunables->lnd_peercredits_hiw = peer_credits_hiw;
 241
 242         if (tunables->lnd_peercredits_hiw < net_tunables->lct_peer_tx_credits / 2)
 243                 tunables->lnd_peercredits_hiw = net_tunables->lct_peer_tx_credits / 2;
 244
 245         if (tunables->lnd_peercredits_hiw >= net_tunables->lct_peer_tx_credits)
 246                 tunables->lnd_peercredits_hiw = net_tunables->lct_peer_tx_credits - 1;
 247
 248         if (tunables->lnd_map_on_demand < IBLND_MIN_MAP_ON_DEMAND ||
 249             tunables->lnd_map_on_demand > IBLND_MAX_RDMA_FRAGS) {
 250                 /* Use the default */
 251                 CWARN("Invalid map_on_demand (%d), expects %d - %d. Using default of %d\n",
 252                       tunables->lnd_map_on_demand, IBLND_MIN_MAP_ON_DEMAND,
 253                       IBLND_MAX_RDMA_FRAGS, IBLND_DEFAULT_MAP_ON_DEMAND);
 254                 tunables->lnd_map_on_demand = IBLND_DEFAULT_MAP_ON_DEMAND;
 255         }
 256
 257         if (tunables->lnd_map_on_demand == 1) {
 258                 /* don't make sense to create map if only one fragment */
 259                 tunables->lnd_map_on_demand = 2;
 260         }
 261
 262         if (tunables->lnd_concurrent_sends == 0) {
 263                 if (tunables->lnd_map_on_demand > 0 &&
 264                     tunables->lnd_map_on_demand <= IBLND_MAX_RDMA_FRAGS / 8) {
 265                         tunables->lnd_concurrent_sends =
 266                                         net_tunables->lct_peer_tx_credits * 2;
 267                 } else {
 268                         tunables->lnd_concurrent_sends =
 269                                 net_tunables->lct_peer_tx_credits;
 270                 }
 271         }
 272
 273         if (tunables->lnd_concurrent_sends > net_tunables->lct_peer_tx_credits * 2)
 274                 tunables->lnd_concurrent_sends = net_tunables->lct_peer_tx_credits * 2;
 275
 276         if (tunables->lnd_concurrent_sends < net_tunables->lct_peer_tx_credits / 2)
 277                 tunables->lnd_concurrent_sends = net_tunables->lct_peer_tx_credits / 2;
 278
 279         if (tunables->lnd_concurrent_sends < net_tunables->lct_peer_tx_credits) {
 280                 CWARN("Concurrent sends %d is lower than message "
 281                       "queue size: %d, performance may drop slightly.\n",
 282                       tunables->lnd_concurrent_sends,
 283                       net_tunables->lct_peer_tx_credits);
 284         }
 285
 286         if (!tunables->lnd_fmr_pool_size)
 287                 tunables->lnd_fmr_pool_size = fmr_pool_size;
 288         if (!tunables->lnd_fmr_flush_trigger)
 289                 tunables->lnd_fmr_flush_trigger = fmr_flush_trigger;
 290         if (!tunables->lnd_fmr_cache)
 291                 tunables->lnd_fmr_cache = fmr_cache;
 292         if (!tunables->lnd_ntx)
 293                 tunables->lnd_ntx = ntx;
 294         if (!tunables->lnd_conns_per_peer) {
 295                 tunables->lnd_conns_per_peer = (conns_per_peer) ?
 296                         conns_per_peer : 1;
 297         }
 298
 299         return 0;
 300 }
 301
 302 int
 303 kiblnd_tunables_init(void)
 304 {
 305         default_tunables.lnd_version = CURRENT_LND_VERSION;
 306         default_tunables.lnd_peercredits_hiw = peer_credits_hiw,
 307         default_tunables.lnd_map_on_demand = map_on_demand;
 308         default_tunables.lnd_concurrent_sends = concurrent_sends;
 309         default_tunables.lnd_fmr_pool_size = fmr_pool_size;
 310         default_tunables.lnd_fmr_flush_trigger = fmr_flush_trigger;
 311         default_tunables.lnd_fmr_cache = fmr_cache;
 312         default_tunables.lnd_ntx = ntx;
 313         default_tunables.lnd_conns_per_peer = conns_per_peer;
 314         return 0;
 315 }