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.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lnet/klnds/o2iblnd/o2iblnd_modparams.c
  37  *
  38  * Author: Eric Barton <eric@bartonsoftware.com>
  39  */
  40
  41 #include "o2iblnd.h"
  42
  43 static int service = 987;
  44 CFS_MODULE_PARM(service, "i", int, 0444,
  45                 "service number (within RDMA_PS_TCP)");
  46
  47 static int cksum = 0;
  48 CFS_MODULE_PARM(cksum, "i", int, 0644,
  49                 "set non-zero to enable message (not RDMA) checksums");
  50
  51 static int timeout = 50;
  52 CFS_MODULE_PARM(timeout, "i", int, 0644,
  53                 "timeout (seconds)");
  54
  55 /* Number of threads in each scheduler pool which is percpt,
  56  * we will estimate reasonable value based on CPUs if it's set to zero. */
  57 static int nscheds;
  58 CFS_MODULE_PARM(nscheds, "i", int, 0444,
  59                 "number of threads in each scheduler pool");
  60
  61 /* NB: this value is shared by all CPTs, it can grow at runtime */
  62 static int ntx = 512;
  63 CFS_MODULE_PARM(ntx, "i", int, 0444,
  64                 "# of message descriptors allocated for each pool");
  65
  66 /* NB: this value is shared by all CPTs */
  67 static int credits = 256;
  68 CFS_MODULE_PARM(credits, "i", int, 0444,
  69                 "# concurrent sends");
  70
  71 static int peer_credits = 8;
  72 CFS_MODULE_PARM(peer_credits, "i", int, 0444,
  73                 "# concurrent sends to 1 peer");
  74
  75 static int peer_credits_hiw = 0;
  76 CFS_MODULE_PARM(peer_credits_hiw, "i", int, 0444,
  77                 "when eagerly to return credits");
  78
  79 static int peer_buffer_credits = 0;
  80 CFS_MODULE_PARM(peer_buffer_credits, "i", int, 0444,
  81                 "# per-peer router buffer credits");
  82
  83 static int peer_timeout = 180;
  84 CFS_MODULE_PARM(peer_timeout, "i", int, 0444,
  85                 "Seconds without aliveness news to declare peer dead (<=0 to disable)");
  86
  87 static char *ipif_name = "ib0";
  88 CFS_MODULE_PARM(ipif_name, "s", charp, 0444,
  89                 "IPoIB interface name");
  90
  91 static int retry_count = 5;
  92 CFS_MODULE_PARM(retry_count, "i", int, 0644,
  93                 "Retransmissions when no ACK received");
  94
  95 static int rnr_retry_count = 6;
  96 CFS_MODULE_PARM(rnr_retry_count, "i", int, 0644,
  97                 "RNR retransmissions");
  98
  99 static int keepalive = 100;
 100 CFS_MODULE_PARM(keepalive, "i", int, 0644,
 101                 "Idle time in seconds before sending a keepalive");
 102
 103 static int ib_mtu = 0;
 104 CFS_MODULE_PARM(ib_mtu, "i", int, 0444,
 105                 "IB MTU 256/512/1024/2048/4096");
 106
 107 static int concurrent_sends = 0;
 108 CFS_MODULE_PARM(concurrent_sends, "i", int, 0444,
 109                 "send work-queue sizing");
 110
 111 static int map_on_demand = 0;
 112 CFS_MODULE_PARM(map_on_demand, "i", int, 0444,
 113                 "map on demand");
 114
 115 /* NB: this value is shared by all CPTs, it can grow at runtime */
 116 static int fmr_pool_size = 512;
 117 CFS_MODULE_PARM(fmr_pool_size, "i", int, 0444,
 118                 "size of fmr pool on each CPT (>= ntx / 4)");
 119
 120 /* NB: this value is shared by all CPTs, it can grow at runtime */
 121 static int fmr_flush_trigger = 384;
 122 CFS_MODULE_PARM(fmr_flush_trigger, "i", int, 0444,
 123                 "# dirty FMRs that triggers pool flush");
 124
 125 static int fmr_cache = 1;
 126 CFS_MODULE_PARM(fmr_cache, "i", int, 0444,
 127                 "non-zero to enable FMR caching");
 128
 129 /*
 130  * 0: disable failover
 131  * 1: enable failover if necessary
 132  * 2: force to failover (for debug)
 133  */
 134 static int dev_failover = 0;
 135 CFS_MODULE_PARM(dev_failover, "i", int, 0444,
 136                "HCA failover for bonding (0 off, 1 on, other values reserved)");
 137
 138
 139 static int require_privileged_port = 0;
 140 CFS_MODULE_PARM(require_privileged_port, "i", int, 0644,
 141                 "require privileged port when accepting connection");
 142
 143 static int use_privileged_port = 1;
 144 CFS_MODULE_PARM(use_privileged_port, "i", int, 0644,
 145                 "use privileged port when initiating connection");
 146
 147 kib_tunables_t kiblnd_tunables = {
 148         .kib_dev_failover           = &dev_failover,
 149         .kib_service                = &service,
 150         .kib_cksum                  = &cksum,
 151         .kib_timeout                = &timeout,
 152         .kib_keepalive              = &keepalive,
 153         .kib_ntx                    = &ntx,
 154         .kib_credits                = &credits,
 155         .kib_peertxcredits          = &peer_credits,
 156         .kib_peercredits_hiw        = &peer_credits_hiw,
 157         .kib_peerrtrcredits         = &peer_buffer_credits,
 158         .kib_peertimeout            = &peer_timeout,
 159         .kib_default_ipif           = &ipif_name,
 160         .kib_retry_count            = &retry_count,
 161         .kib_rnr_retry_count        = &rnr_retry_count,
 162         .kib_concurrent_sends       = &concurrent_sends,
 163         .kib_ib_mtu                 = &ib_mtu,
 164         .kib_map_on_demand          = &map_on_demand,
 165         .kib_fmr_pool_size          = &fmr_pool_size,
 166         .kib_fmr_flush_trigger      = &fmr_flush_trigger,
 167         .kib_fmr_cache              = &fmr_cache,
 168         .kib_require_priv_port      = &require_privileged_port,
 169         .kib_use_priv_port          = &use_privileged_port,
 170         .kib_nscheds                = &nscheds
 171 };
 172
 173 #if defined(CONFIG_SYSCTL) && !CFS_SYSFS_MODULE_PARM
 174
 175 static char ipif_basename_space[32];
 176
 177 static struct ctl_table kiblnd_ctl_table[] = {
 178         {
 179                 INIT_CTL_NAME
 180                 .procname       = "service",
 181                 .data           = &service,
 182                 .maxlen         = sizeof(int),
 183                 .mode           = 0444,
 184                 .proc_handler   = &proc_dointvec
 185         },
 186         {
 187                 INIT_CTL_NAME
 188                 .procname       = "cksum",
 189                 .data           = &cksum,
 190                 .maxlen         = sizeof(int),
 191                 .mode           = 0644,
 192                 .proc_handler   = &proc_dointvec
 193         },
 194         {
 195                 INIT_CTL_NAME
 196                 .procname       = "timeout",
 197                 .data           = &timeout,
 198                 .maxlen         = sizeof(int),
 199                 .mode           = 0644,
 200                 .proc_handler   = &proc_dointvec
 201         },
 202         {
 203                 INIT_CTL_NAME
 204                 .procname       = "ntx",
 205                 .data           = &ntx,
 206                 .maxlen         = sizeof(int),
 207                 .mode           = 0444,
 208                 .proc_handler   = &proc_dointvec
 209         },
 210         {
 211                 INIT_CTL_NAME
 212                 .procname       = "credits",
 213                 .data           = &credits,
 214                 .maxlen         = sizeof(int),
 215                 .mode           = 0444,
 216                 .proc_handler   = &proc_dointvec
 217         },
 218         {
 219                 INIT_CTL_NAME
 220                 .procname       = "peer_credits",
 221                 .data           = &peer_credits,
 222                 .maxlen         = sizeof(int),
 223                 .mode           = 0444,
 224                 .proc_handler   = &proc_dointvec
 225         },
 226         {
 227                 INIT_CTL_NAME
 228                 .procname       = "peer_credits_hiw",
 229                 .data           = &peer_credits_hiw,
 230                 .maxlen         = sizeof(int),
 231                 .mode           = 0444,
 232                 .proc_handler   = &proc_dointvec
 233         },
 234         {
 235                 INIT_CTL_NAME
 236                 .procname       = "peer_buffer_credits",
 237                 .data           = &peer_buffer_credits,
 238                 .maxlen         = sizeof(int),
 239                 .mode           = 0444,
 240                 .proc_handler   = &proc_dointvec
 241         },
 242         {
 243                 INIT_CTL_NAME
 244                 .procname       = "peer_timeout",
 245                 .data           = &peer_timeout,
 246                 .maxlen         = sizeof(int),
 247                 .mode           = 0444,
 248                 .proc_handler   = &proc_dointvec
 249         },
 250         {
 251                 INIT_CTL_NAME
 252                 .procname       = "ipif_name",
 253                 .data           = ipif_basename_space,
 254                 .maxlen         = sizeof(ipif_basename_space),
 255                 .mode           = 0444,
 256                 .proc_handler   = &proc_dostring
 257         },
 258         {
 259                 INIT_CTL_NAME
 260                 .procname       = "retry_count",
 261                 .data           = &retry_count,
 262                 .maxlen         = sizeof(int),
 263                 .mode           = 0644,
 264                 .proc_handler   = &proc_dointvec
 265         },
 266         {
 267                 INIT_CTL_NAME
 268                 .procname       = "rnr_retry_count",
 269                 .data           = &rnr_retry_count,
 270                 .maxlen         = sizeof(int),
 271                 .mode           = 0644,
 272                 .proc_handler   = &proc_dointvec
 273         },
 274         {
 275                 INIT_CTL_NAME
 276                 .procname       = "keepalive",
 277                 .data           = &keepalive,
 278                 .maxlen         = sizeof(int),
 279                 .mode           = 0644,
 280                 .proc_handler   = &proc_dointvec
 281         },
 282         {
 283                 INIT_CTL_NAME
 284                 .procname       = "concurrent_sends",
 285                 .data           = &concurrent_sends,
 286                 .maxlen         = sizeof(int),
 287                 .mode           = 0444,
 288                 .proc_handler   = &proc_dointvec
 289         },
 290         {
 291                 INIT_CTL_NAME
 292                 .procname       = "ib_mtu",
 293                 .data           = &ib_mtu,
 294                 .maxlen         = sizeof(int),
 295                 .mode           = 0444,
 296                 .proc_handler   = &proc_dointvec
 297         },
 298         {
 299                 INIT_CTL_NAME
 300                 .procname       = "map_on_demand",
 301                 .data           = &map_on_demand,
 302                 .maxlen         = sizeof(int),
 303                 .mode           = 0444,
 304                 .proc_handler   = &proc_dointvec
 305         },
 306         {
 307                 INIT_CTL_NAME
 308                 .procname       = "fmr_pool_size",
 309                 .data           = &fmr_pool_size,
 310                 .maxlen         = sizeof(int),
 311                 .mode           = 0444,
 312                 .proc_handler   = &proc_dointvec
 313         },
 314         {
 315                 INIT_CTL_NAME
 316                 .procname       = "fmr_flush_trigger",
 317                 .data           = &fmr_flush_trigger,
 318                 .maxlen         = sizeof(int),
 319                 .mode           = 0444,
 320                 .proc_handler   = &proc_dointvec
 321         },
 322         {
 323                 INIT_CTL_NAME
 324                 .procname       = "fmr_cache",
 325                 .data           = &fmr_cache,
 326                 .maxlen         = sizeof(int),
 327                 .mode           = 0444,
 328                 .proc_handler   = &proc_dointvec
 329         },
 330         {
 331                 INIT_CTL_NAME
 332                 .procname       = "dev_failover",
 333                 .data           = &dev_failover,
 334                 .maxlen         = sizeof(int),
 335                 .mode           = 0444,
 336                 .proc_handler   = &proc_dointvec
 337         },
 338         { 0 }
 339 };
 340
 341 static struct ctl_table kiblnd_top_ctl_table[] = {
 342         {
 343                 INIT_CTL_NAME
 344                 .procname       = "o2iblnd",
 345                 .data           = NULL,
 346                 .maxlen         = 0,
 347                 .mode           = 0555,
 348                 .child          = kiblnd_ctl_table
 349         },
 350         { 0 }
 351 };
 352
 353 void
 354 kiblnd_initstrtunable(char *space, char *str, int size)
 355 {
 356         strncpy(space, str, size);
 357         space[size-1] = 0;
 358 }
 359
 360 static void
 361 kiblnd_sysctl_init (void)
 362 {
 363         kiblnd_initstrtunable(ipif_basename_space, ipif_name,
 364                               sizeof(ipif_basename_space));
 365
 366         kiblnd_tunables.kib_sysctl =
 367                 register_sysctl_table(kiblnd_top_ctl_table);
 368
 369         if (kiblnd_tunables.kib_sysctl == NULL)
 370                 CWARN("Can't setup /proc tunables\n");
 371 }
 372
 373 static void
 374 kiblnd_sysctl_fini (void)
 375 {
 376         if (kiblnd_tunables.kib_sysctl != NULL)
 377                 unregister_sysctl_table(kiblnd_tunables.kib_sysctl);
 378 }
 379
 380 #else
 381
 382 static void
 383 kiblnd_sysctl_init (void)
 384 {
 385 }
 386
 387 static void
 388 kiblnd_sysctl_fini (void)
 389 {
 390 }
 391
 392 #endif
 393
 394 int
 395 kiblnd_tunables_init (void)
 396 {
 397         if (kiblnd_translate_mtu(*kiblnd_tunables.kib_ib_mtu) < 0) {
 398                 CERROR("Invalid ib_mtu %d, expected 256/512/1024/2048/4096\n",
 399                        *kiblnd_tunables.kib_ib_mtu);
 400                 return -EINVAL;
 401         }
 402
 403         if (*kiblnd_tunables.kib_peertxcredits < IBLND_CREDITS_DEFAULT)
 404                 *kiblnd_tunables.kib_peertxcredits = IBLND_CREDITS_DEFAULT;
 405
 406         if (*kiblnd_tunables.kib_peertxcredits > IBLND_CREDITS_MAX)
 407                 *kiblnd_tunables.kib_peertxcredits = IBLND_CREDITS_MAX;
 408
 409         if (*kiblnd_tunables.kib_peertxcredits > *kiblnd_tunables.kib_credits)
 410                 *kiblnd_tunables.kib_peertxcredits = *kiblnd_tunables.kib_credits;
 411
 412         if (*kiblnd_tunables.kib_peercredits_hiw < *kiblnd_tunables.kib_peertxcredits / 2)
 413                 *kiblnd_tunables.kib_peercredits_hiw = *kiblnd_tunables.kib_peertxcredits / 2;
 414
 415         if (*kiblnd_tunables.kib_peercredits_hiw >= *kiblnd_tunables.kib_peertxcredits)
 416                 *kiblnd_tunables.kib_peercredits_hiw = *kiblnd_tunables.kib_peertxcredits - 1;
 417
 418         if (*kiblnd_tunables.kib_map_on_demand < 0 ||
 419             *kiblnd_tunables.kib_map_on_demand > IBLND_MAX_RDMA_FRAGS)
 420                 *kiblnd_tunables.kib_map_on_demand = 0; /* disable map-on-demand */
 421
 422         if (*kiblnd_tunables.kib_map_on_demand == 1)
 423                 *kiblnd_tunables.kib_map_on_demand = 2; /* don't make sense to create map if only one fragment */
 424
 425         if (*kiblnd_tunables.kib_concurrent_sends == 0) {
 426                 if (*kiblnd_tunables.kib_map_on_demand > 0 &&
 427                     *kiblnd_tunables.kib_map_on_demand <= IBLND_MAX_RDMA_FRAGS / 8)
 428                         *kiblnd_tunables.kib_concurrent_sends = (*kiblnd_tunables.kib_peertxcredits) * 2;
 429                 else
 430                         *kiblnd_tunables.kib_concurrent_sends = (*kiblnd_tunables.kib_peertxcredits);
 431         }
 432
 433         if (*kiblnd_tunables.kib_concurrent_sends > *kiblnd_tunables.kib_peertxcredits * 2)
 434                 *kiblnd_tunables.kib_concurrent_sends = *kiblnd_tunables.kib_peertxcredits * 2;
 435
 436         if (*kiblnd_tunables.kib_concurrent_sends < *kiblnd_tunables.kib_peertxcredits / 2)
 437                 *kiblnd_tunables.kib_concurrent_sends = *kiblnd_tunables.kib_peertxcredits / 2;
 438
 439         if (*kiblnd_tunables.kib_concurrent_sends < *kiblnd_tunables.kib_peertxcredits) {
 440                 CWARN("Concurrent sends %d is lower than message queue size: %d, "
 441                       "performance may drop slightly.\n",
 442                       *kiblnd_tunables.kib_concurrent_sends, *kiblnd_tunables.kib_peertxcredits);
 443         }
 444
 445         kiblnd_sysctl_init();
 446         return 0;
 447 }
 448
 449 void
 450 kiblnd_tunables_fini (void)
 451 {
 452         kiblnd_sysctl_fini();
 453 }