drivers/staging/lustre/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 /* NB: this value is shared by all CPTs, it can grow at runtime */
 130 static int pmr_pool_size = 512;
 131 CFS_MODULE_PARM(pmr_pool_size, "i", int, 0444,
 132                 "size of MR cache pmr pool on each CPT");
 133
 134 /*
 135  * 0: disable failover
 136  * 1: enable failover if necessary
 137  * 2: force to failover (for debug)
 138  */
 139 static int dev_failover = 0;
 140 CFS_MODULE_PARM(dev_failover, "i", int, 0444,
 141                "HCA failover for bonding (0 off, 1 on, other values reserved)");
 142
 143
 144 static int require_privileged_port = 0;
 145 CFS_MODULE_PARM(require_privileged_port, "i", int, 0644,
 146                 "require privileged port when accepting connection");
 147
 148 static int use_privileged_port = 1;
 149 CFS_MODULE_PARM(use_privileged_port, "i", int, 0644,
 150                 "use privileged port when initiating connection");
 151
 152 kib_tunables_t kiblnd_tunables = {
 153         .kib_dev_failover          = &dev_failover,
 154         .kib_service            = &service,
 155         .kib_cksum                = &cksum,
 156         .kib_timeout            = &timeout,
 157         .kib_keepalive        = &keepalive,
 158         .kib_ntx                    = &ntx,
 159         .kib_credits            = &credits,
 160         .kib_peertxcredits        = &peer_credits,
 161         .kib_peercredits_hiw    = &peer_credits_hiw,
 162         .kib_peerrtrcredits      = &peer_buffer_credits,
 163         .kib_peertimeout            = &peer_timeout,
 164         .kib_default_ipif          = &ipif_name,
 165         .kib_retry_count            = &retry_count,
 166         .kib_rnr_retry_count    = &rnr_retry_count,
 167         .kib_concurrent_sends       = &concurrent_sends,
 168         .kib_ib_mtu              = &ib_mtu,
 169         .kib_map_on_demand        = &map_on_demand,
 170         .kib_fmr_pool_size        = &fmr_pool_size,
 171         .kib_fmr_flush_trigger      = &fmr_flush_trigger,
 172         .kib_fmr_cache        = &fmr_cache,
 173         .kib_pmr_pool_size        = &pmr_pool_size,
 174         .kib_require_priv_port      = &require_privileged_port,
 175         .kib_use_priv_port          = &use_privileged_port,
 176         .kib_nscheds                = &nscheds
 177 };
 178
 179 #if defined(CONFIG_SYSCTL) && !CFS_SYSFS_MODULE_PARM
 180
 181 static char ipif_basename_space[32];
 182
 183
 184 enum {
 185         O2IBLND_SERVICE  = 1,
 186         O2IBLND_CKSUM,
 187         O2IBLND_TIMEOUT,
 188         O2IBLND_NTX,
 189         O2IBLND_CREDITS,
 190         O2IBLND_PEER_TXCREDITS,
 191         O2IBLND_PEER_CREDITS_HIW,
 192         O2IBLND_PEER_RTRCREDITS,
 193         O2IBLND_PEER_TIMEOUT,
 194         O2IBLND_IPIF_BASENAME,
 195         O2IBLND_RETRY_COUNT,
 196         O2IBLND_RNR_RETRY_COUNT,
 197         O2IBLND_KEEPALIVE,
 198         O2IBLND_CONCURRENT_SENDS,
 199         O2IBLND_IB_MTU,
 200         O2IBLND_MAP_ON_DEMAND,
 201         O2IBLND_FMR_POOL_SIZE,
 202         O2IBLND_FMR_FLUSH_TRIGGER,
 203         O2IBLND_FMR_CACHE,
 204         O2IBLND_PMR_POOL_SIZE,
 205         O2IBLND_DEV_FAILOVER
 206 };
 207
 208 static ctl_table_t kiblnd_ctl_table[] = {
 209         {
 210                 .ctl_name = O2IBLND_SERVICE,
 211                 .procname = "service",
 212                 .data     = &service,
 213                 .maxlen   = sizeof(int),
 214                 .mode     = 0444,
 215                 .proc_handler = &proc_dointvec
 216         },
 217         {
 218                 .ctl_name = O2IBLND_CKSUM,
 219                 .procname = "cksum",
 220                 .data     = &cksum,
 221                 .maxlen   = sizeof(int),
 222                 .mode     = 0644,
 223                 .proc_handler = &proc_dointvec
 224         },
 225         {
 226                 .ctl_name = O2IBLND_TIMEOUT,
 227                 .procname = "timeout",
 228                 .data     = &timeout,
 229                 .maxlen   = sizeof(int),
 230                 .mode     = 0644,
 231                 .proc_handler = &proc_dointvec
 232         },
 233         {
 234                 .ctl_name = O2IBLND_NTX,
 235                 .procname = "ntx",
 236                 .data     = &ntx,
 237                 .maxlen   = sizeof(int),
 238                 .mode     = 0444,
 239                 .proc_handler = &proc_dointvec
 240         },
 241         {
 242                 .ctl_name = O2IBLND_CREDITS,
 243                 .procname = "credits",
 244                 .data     = &credits,
 245                 .maxlen   = sizeof(int),
 246                 .mode     = 0444,
 247                 .proc_handler = &proc_dointvec
 248         },
 249         {
 250                 .ctl_name = O2IBLND_PEER_TXCREDITS,
 251                 .procname = "peer_credits",
 252                 .data     = &peer_credits,
 253                 .maxlen   = sizeof(int),
 254                 .mode     = 0444,
 255                 .proc_handler = &proc_dointvec
 256         },
 257         {
 258                 .ctl_name = O2IBLND_PEER_CREDITS_HIW,
 259                 .procname = "peer_credits_hiw",
 260                 .data     = &peer_credits_hiw,
 261                 .maxlen   = sizeof(int),
 262                 .mode     = 0444,
 263                 .proc_handler = &proc_dointvec
 264         },
 265         {
 266                 .ctl_name = O2IBLND_PEER_RTRCREDITS,
 267                 .procname = "peer_buffer_credits",
 268                 .data     = &peer_buffer_credits,
 269                 .maxlen   = sizeof(int),
 270                 .mode     = 0444,
 271                 .proc_handler = &proc_dointvec
 272         },
 273         {
 274                 .ctl_name = O2IBLND_PEER_TIMEOUT,
 275                 .procname = "peer_timeout",
 276                 .data     = &peer_timeout,
 277                 .maxlen   = sizeof(int),
 278                 .mode     = 0444,
 279                 .proc_handler = &proc_dointvec
 280         },
 281         {
 282                 .ctl_name = O2IBLND_IPIF_BASENAME,
 283                 .procname = "ipif_name",
 284                 .data     = ipif_basename_space,
 285                 .maxlen   = sizeof(ipif_basename_space),
 286                 .mode     = 0444,
 287                 .proc_handler = &proc_dostring
 288         },
 289         {
 290                 .ctl_name = O2IBLND_RETRY_COUNT,
 291                 .procname = "retry_count",
 292                 .data     = &retry_count,
 293                 .maxlen   = sizeof(int),
 294                 .mode     = 0644,
 295                 .proc_handler = &proc_dointvec
 296         },
 297         {
 298                 .ctl_name = O2IBLND_RNR_RETRY_COUNT,
 299                 .procname = "rnr_retry_count",
 300                 .data     = &rnr_retry_count,
 301                 .maxlen   = sizeof(int),
 302                 .mode     = 0644,
 303                 .proc_handler = &proc_dointvec
 304         },
 305         {
 306                 .ctl_name = O2IBLND_KEEPALIVE,
 307                 .procname = "keepalive",
 308                 .data     = &keepalive,
 309                 .maxlen   = sizeof(int),
 310                 .mode     = 0644,
 311                 .proc_handler = &proc_dointvec
 312         },
 313         {
 314                 .ctl_name = O2IBLND_CONCURRENT_SENDS,
 315                 .procname = "concurrent_sends",
 316                 .data     = &concurrent_sends,
 317                 .maxlen   = sizeof(int),
 318                 .mode     = 0444,
 319                 .proc_handler = &proc_dointvec
 320         },
 321         {
 322                 .ctl_name = O2IBLND_IB_MTU,
 323                 .procname = "ib_mtu",
 324                 .data     = &ib_mtu,
 325                 .maxlen   = sizeof(int),
 326                 .mode     = 0444,
 327                 .proc_handler = &proc_dointvec
 328         },
 329         {
 330                 .ctl_name = O2IBLND_MAP_ON_DEMAND,
 331                 .procname = "map_on_demand",
 332                 .data     = &map_on_demand,
 333                 .maxlen   = sizeof(int),
 334                 .mode     = 0444,
 335                 .proc_handler = &proc_dointvec
 336         },
 337
 338         {
 339                 .ctl_name = O2IBLND_FMR_POOL_SIZE,
 340                 .procname = "fmr_pool_size",
 341                 .data     = &fmr_pool_size,
 342                 .maxlen   = sizeof(int),
 343                 .mode     = 0444,
 344                 .proc_handler = &proc_dointvec
 345         },
 346         {
 347                 .ctl_name = O2IBLND_FMR_FLUSH_TRIGGER,
 348                 .procname = "fmr_flush_trigger",
 349                 .data     = &fmr_flush_trigger,
 350                 .maxlen   = sizeof(int),
 351                 .mode     = 0444,
 352                 .proc_handler = &proc_dointvec
 353         },
 354         {
 355                 .ctl_name = O2IBLND_FMR_CACHE,
 356                 .procname = "fmr_cache",
 357                 .data     = &fmr_cache,
 358                 .maxlen   = sizeof(int),
 359                 .mode     = 0444,
 360                 .proc_handler = &proc_dointvec
 361         },
 362         {
 363                 .ctl_name = O2IBLND_PMR_POOL_SIZE,
 364                 .procname = "pmr_pool_size",
 365                 .data     = &pmr_pool_size,
 366                 .maxlen   = sizeof(int),
 367                 .mode     = 0444,
 368                 .proc_handler = &proc_dointvec
 369         },
 370         {
 371                 .ctl_name = O2IBLND_DEV_FAILOVER,
 372                 .procname = "dev_failover",
 373                 .data     = &dev_failover,
 374                 .maxlen   = sizeof(int),
 375                 .mode     = 0444,
 376                 .proc_handler = &proc_dointvec
 377         },
 378         {0}
 379 };
 380
 381 static ctl_table_t kiblnd_top_ctl_table[] = {
 382         {
 383                 .ctl_name = CTL_O2IBLND,
 384                 .procname = "o2iblnd",
 385                 .data     = NULL,
 386                 .maxlen   = 0,
 387                 .mode     = 0555,
 388                 .child    = kiblnd_ctl_table
 389         },
 390         {0}
 391 };
 392
 393 void
 394 kiblnd_initstrtunable(char *space, char *str, int size)
 395 {
 396         strncpy(space, str, size);
 397         space[size-1] = 0;
 398 }
 399
 400 void
 401 kiblnd_sysctl_init (void)
 402 {
 403         kiblnd_initstrtunable(ipif_basename_space, ipif_name,
 404                               sizeof(ipif_basename_space));
 405
 406         kiblnd_tunables.kib_sysctl =
 407                 register_sysctl_table(kiblnd_top_ctl_table);
 408
 409         if (kiblnd_tunables.kib_sysctl == NULL)
 410                 CWARN("Can't setup /proc tunables\n");
 411 }
 412
 413 void
 414 kiblnd_sysctl_fini (void)
 415 {
 416         if (kiblnd_tunables.kib_sysctl != NULL)
 417                 unregister_sysctl_table(kiblnd_tunables.kib_sysctl);
 418 }
 419
 420 #else
 421
 422 void
 423 kiblnd_sysctl_init (void)
 424 {
 425 }
 426
 427 void
 428 kiblnd_sysctl_fini (void)
 429 {
 430 }
 431
 432 #endif
 433
 434 int
 435 kiblnd_tunables_init (void)
 436 {
 437         if (kiblnd_translate_mtu(*kiblnd_tunables.kib_ib_mtu) < 0) {
 438                 CERROR("Invalid ib_mtu %d, expected 256/512/1024/2048/4096\n",
 439                        *kiblnd_tunables.kib_ib_mtu);
 440                 return -EINVAL;
 441         }
 442
 443         if (*kiblnd_tunables.kib_peertxcredits < IBLND_CREDITS_DEFAULT)
 444                 *kiblnd_tunables.kib_peertxcredits = IBLND_CREDITS_DEFAULT;
 445
 446         if (*kiblnd_tunables.kib_peertxcredits > IBLND_CREDITS_MAX)
 447                 *kiblnd_tunables.kib_peertxcredits = IBLND_CREDITS_MAX;
 448
 449         if (*kiblnd_tunables.kib_peertxcredits > *kiblnd_tunables.kib_credits)
 450                 *kiblnd_tunables.kib_peertxcredits = *kiblnd_tunables.kib_credits;
 451
 452         if (*kiblnd_tunables.kib_peercredits_hiw < *kiblnd_tunables.kib_peertxcredits / 2)
 453                 *kiblnd_tunables.kib_peercredits_hiw = *kiblnd_tunables.kib_peertxcredits / 2;
 454
 455         if (*kiblnd_tunables.kib_peercredits_hiw >= *kiblnd_tunables.kib_peertxcredits)
 456                 *kiblnd_tunables.kib_peercredits_hiw = *kiblnd_tunables.kib_peertxcredits - 1;
 457
 458         if (*kiblnd_tunables.kib_map_on_demand < 0 ||
 459             *kiblnd_tunables.kib_map_on_demand > IBLND_MAX_RDMA_FRAGS)
 460                 *kiblnd_tunables.kib_map_on_demand = 0; /* disable map-on-demand */
 461
 462         if (*kiblnd_tunables.kib_map_on_demand == 1)
 463                 *kiblnd_tunables.kib_map_on_demand = 2; /* don't make sense to create map if only one fragment */
 464
 465         if (*kiblnd_tunables.kib_concurrent_sends == 0) {
 466                 if (*kiblnd_tunables.kib_map_on_demand > 0 &&
 467                     *kiblnd_tunables.kib_map_on_demand <= IBLND_MAX_RDMA_FRAGS / 8)
 468                         *kiblnd_tunables.kib_concurrent_sends = (*kiblnd_tunables.kib_peertxcredits) * 2;
 469                 else
 470                         *kiblnd_tunables.kib_concurrent_sends = (*kiblnd_tunables.kib_peertxcredits);
 471         }
 472
 473         if (*kiblnd_tunables.kib_concurrent_sends > *kiblnd_tunables.kib_peertxcredits * 2)
 474                 *kiblnd_tunables.kib_concurrent_sends = *kiblnd_tunables.kib_peertxcredits * 2;
 475
 476         if (*kiblnd_tunables.kib_concurrent_sends < *kiblnd_tunables.kib_peertxcredits / 2)
 477                 *kiblnd_tunables.kib_concurrent_sends = *kiblnd_tunables.kib_peertxcredits / 2;
 478
 479         if (*kiblnd_tunables.kib_concurrent_sends < *kiblnd_tunables.kib_peertxcredits) {
 480                 CWARN("Concurrent sends %d is lower than message queue size: %d, "
 481                       "performance may drop slightly.\n",
 482                       *kiblnd_tunables.kib_concurrent_sends, *kiblnd_tunables.kib_peertxcredits);
 483         }
 484
 485         kiblnd_sysctl_init();
 486         return 0;
 487 }
 488
 489 void
 490 kiblnd_tunables_fini (void)
 491 {
 492         kiblnd_sysctl_fini();
 493 }