lnet/klnds/o2iblnd/o2iblnd_modparams.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  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 static int ntx = 256;
  56 CFS_MODULE_PARM(ntx, "i", int, 0444,
  57                 "# of message descriptors");
  58
  59 static int credits = 64;
  60 CFS_MODULE_PARM(credits, "i", int, 0444,
  61                 "# concurrent sends");
  62
  63 static int peer_credits = 8;
  64 CFS_MODULE_PARM(peer_credits, "i", int, 0444,
  65                 "# concurrent sends to 1 peer");
  66
  67 static int peer_credits_hiw = 0;
  68 CFS_MODULE_PARM(peer_credits_hiw, "i", int, 0444,
  69                 "when eagerly to return credits");
  70
  71 static int peer_buffer_credits = 0;
  72 CFS_MODULE_PARM(peer_buffer_credits, "i", int, 0444,
  73                 "# per-peer router buffer credits");
  74
  75 static int peer_timeout = 0;
  76 CFS_MODULE_PARM(peer_timeout, "i", int, 0444,
  77                 "Seconds without aliveness news to declare peer dead (<=0 to disable)");
  78
  79 static char *ipif_name = "ib0";
  80 CFS_MODULE_PARM(ipif_name, "s", charp, 0444,
  81                 "IPoIB interface name");
  82
  83 static int retry_count = 5;
  84 CFS_MODULE_PARM(retry_count, "i", int, 0644,
  85                 "Retransmissions when no ACK received");
  86
  87 static int rnr_retry_count = 6;
  88 CFS_MODULE_PARM(rnr_retry_count, "i", int, 0644,
  89                 "RNR retransmissions");
  90
  91 static int keepalive = 100;
  92 CFS_MODULE_PARM(keepalive, "i", int, 0644,
  93                 "Idle time in seconds before sending a keepalive");
  94
  95 static int ib_mtu = 0;
  96 CFS_MODULE_PARM(ib_mtu, "i", int, 0444,
  97                 "IB MTU 256/512/1024/2048/4096");
  98
  99 static int concurrent_sends = 0;
 100 CFS_MODULE_PARM(concurrent_sends, "i", int, 0444,
 101                 "send work-queue sizing");
 102
 103 static int map_on_demand = 0;
 104 CFS_MODULE_PARM(map_on_demand, "i", int, 0444,
 105                 "map on demand");
 106
 107 static int fmr_pool_size = 512;
 108 CFS_MODULE_PARM(fmr_pool_size, "i", int, 0444,
 109                 "size of the fmr pool (>= ntx)");
 110
 111 static int fmr_flush_trigger = 384;
 112 CFS_MODULE_PARM(fmr_flush_trigger, "i", int, 0444,
 113                 "# dirty FMRs that triggers pool flush");
 114
 115 static int fmr_cache = 1;
 116 CFS_MODULE_PARM(fmr_cache, "i", int, 0444,
 117                 "non-zero to enable FMR caching");
 118
 119 static int pmr_pool_size = 512;
 120 CFS_MODULE_PARM(pmr_pool_size, "i", int, 0444,
 121                 "size of the MR cache pmr pool");
 122
 123 kib_tunables_t kiblnd_tunables = {
 124         .kib_service                = &service,
 125         .kib_cksum                  = &cksum,
 126         .kib_timeout                = &timeout,
 127         .kib_keepalive              = &keepalive,
 128         .kib_ntx                    = &ntx,
 129         .kib_credits                = &credits,
 130         .kib_peertxcredits          = &peer_credits,
 131         .kib_peercredits_hiw        = &peer_credits_hiw,
 132         .kib_peerrtrcredits         = &peer_buffer_credits,
 133         .kib_peertimeout            = &peer_timeout,
 134         .kib_default_ipif           = &ipif_name,
 135         .kib_retry_count            = &retry_count,
 136         .kib_rnr_retry_count        = &rnr_retry_count,
 137         .kib_concurrent_sends       = &concurrent_sends,
 138         .kib_ib_mtu                 = &ib_mtu,
 139         .kib_map_on_demand          = &map_on_demand,
 140         .kib_fmr_pool_size          = &fmr_pool_size,
 141         .kib_fmr_flush_trigger      = &fmr_flush_trigger,
 142         .kib_fmr_cache              = &fmr_cache,
 143         .kib_pmr_pool_size          = &pmr_pool_size,
 144 };
 145
 146 #if defined(CONFIG_SYSCTL) && !CFS_SYSFS_MODULE_PARM
 147
 148 static char ipif_basename_space[32];
 149
 150 #ifndef HAVE_SYSCTL_UNNUMBERED
 151
 152 enum {
 153         O2IBLND_SERVICE  = 1,
 154         O2IBLND_CKSUM,
 155         O2IBLND_TIMEOUT,
 156         O2IBLND_NTX,
 157         O2IBLND_CREDITS,
 158         O2IBLND_PEER_TXCREDITS,
 159         O2IBLND_PEER_CREDITS_HIW,
 160         O2IBLND_PEER_RTRCREDITS,
 161         O2IBLND_PEER_TIMEOUT,
 162         O2IBLND_IPIF_BASENAME,
 163         O2IBLND_RETRY_COUNT,
 164         O2IBLND_RNR_RETRY_COUNT,
 165         O2IBLND_KEEPALIVE,
 166         O2IBLND_CONCURRENT_SENDS,
 167         O2IBLND_IB_MTU,
 168         O2IBLND_MAP_ON_DEMAND,
 169         O2IBLND_FMR_POOL_SIZE,
 170         O2IBLND_FMR_FLUSH_TRIGGER,
 171         O2IBLND_FMR_CACHE,
 172         O2IBLND_PMR_POOL_SIZE
 173 };
 174 #else
 175
 176 #define O2IBLND_SERVICE          CTL_UNNUMBERED
 177 #define O2IBLND_CKSUM            CTL_UNNUMBERED
 178 #define O2IBLND_TIMEOUT          CTL_UNNUMBERED
 179 #define O2IBLND_NTX              CTL_UNNUMBERED
 180 #define O2IBLND_CREDITS          CTL_UNNUMBERED
 181 #define O2IBLND_PEER_TXCREDITS   CTL_UNNUMBERED
 182 #define O2IBLND_PEER_CREDITS_HIW CTL_UNNUMBERED
 183 #define O2IBLND_PEER_RTRCREDITS  CTL_UNNUMBERED
 184 #define O2IBLND_PEER_TIMEOUT     CTL_UNNUMBERED
 185 #define O2IBLND_IPIF_BASENAME    CTL_UNNUMBERED
 186 #define O2IBLND_RETRY_COUNT      CTL_UNNUMBERED
 187 #define O2IBLND_RNR_RETRY_COUNT  CTL_UNNUMBERED
 188 #define O2IBLND_KEEPALIVE        CTL_UNNUMBERED
 189 #define O2IBLND_CONCURRENT_SENDS CTL_UNNUMBERED
 190 #define O2IBLND_IB_MTU           CTL_UNNUMBERED
 191 #define O2IBLND_MAP_ON_DEMAND    CTL_UNNUMBERED
 192 #define O2IBLND_FMR_POOL_SIZE    CTL_UNNUMBERED
 193 #define O2IBLND_FMR_FLUSH_TRIGGER CTL_UNNUMBERED
 194 #define O2IBLND_FMR_CACHE        CTL_UNNUMBERED
 195 #define O2IBLND_PMR_POOL_SIZE    CTL_UNNUMBERED
 196
 197 #endif
 198
 199 static cfs_sysctl_table_t kiblnd_ctl_table[] = {
 200         {
 201                 .ctl_name = O2IBLND_SERVICE,
 202                 .procname = "service",
 203                 .data     = &service,
 204                 .maxlen   = sizeof(int),
 205                 .mode     = 0444,
 206                 .proc_handler = &proc_dointvec
 207         },
 208         {
 209                 .ctl_name = O2IBLND_CKSUM,
 210                 .procname = "cksum",
 211                 .data     = &cksum,
 212                 .maxlen   = sizeof(int),
 213                 .mode     = 0644,
 214                 .proc_handler = &proc_dointvec
 215         },
 216         {
 217                 .ctl_name = O2IBLND_TIMEOUT,
 218                 .procname = "timeout",
 219                 .data     = &timeout,
 220                 .maxlen   = sizeof(int),
 221                 .mode     = 0644,
 222                 .proc_handler = &proc_dointvec
 223         },
 224         {
 225                 .ctl_name = O2IBLND_NTX,
 226                 .procname = "ntx",
 227                 .data     = &ntx,
 228                 .maxlen   = sizeof(int),
 229                 .mode     = 0444,
 230                 .proc_handler = &proc_dointvec
 231         },
 232         {
 233                 .ctl_name = O2IBLND_CREDITS,
 234                 .procname = "credits",
 235                 .data     = &credits,
 236                 .maxlen   = sizeof(int),
 237                 .mode     = 0444,
 238                 .proc_handler = &proc_dointvec
 239         },
 240         {
 241                 .ctl_name = O2IBLND_PEER_TXCREDITS,
 242                 .procname = "peer_credits",
 243                 .data     = &peer_credits,
 244                 .maxlen   = sizeof(int),
 245                 .mode     = 0444,
 246                 .proc_handler = &proc_dointvec
 247         },
 248         {
 249                 .ctl_name = O2IBLND_PEER_CREDITS_HIW,
 250                 .procname = "peer_credits_hiw",
 251                 .data     = &peer_credits_hiw,
 252                 .maxlen   = sizeof(int),
 253                 .mode     = 0444,
 254                 .proc_handler = &proc_dointvec
 255         },
 256         {
 257                 .ctl_name = O2IBLND_PEER_RTRCREDITS,
 258                 .procname = "peer_buffer_credits",
 259                 .data     = &peer_buffer_credits,
 260                 .maxlen   = sizeof(int),
 261                 .mode     = 0444,
 262                 .proc_handler = &proc_dointvec
 263         },
 264         {
 265                 .ctl_name = O2IBLND_PEER_TIMEOUT,
 266                 .procname = "peer_timeout",
 267                 .data     = &peer_timeout,
 268                 .maxlen   = sizeof(int),
 269                 .mode     = 0444,
 270                 .proc_handler = &proc_dointvec
 271         },
 272         {
 273                 .ctl_name = O2IBLND_IPIF_BASENAME,
 274                 .procname = "ipif_name",
 275                 .data     = ipif_basename_space,
 276                 .maxlen   = sizeof(ipif_basename_space),
 277                 .mode     = 0444,
 278                 .proc_handler = &proc_dostring
 279         },
 280         {
 281                 .ctl_name = O2IBLND_RETRY_COUNT,
 282                 .procname = "retry_count",
 283                 .data     = &retry_count,
 284                 .maxlen   = sizeof(int),
 285                 .mode     = 0644,
 286                 .proc_handler = &proc_dointvec
 287         },
 288         {
 289                 .ctl_name = O2IBLND_RNR_RETRY_COUNT,
 290                 .procname = "rnr_retry_count",
 291                 .data     = &rnr_retry_count,
 292                 .maxlen   = sizeof(int),
 293                 .mode     = 0644,
 294                 .proc_handler = &proc_dointvec
 295         },
 296         {
 297                 .ctl_name = O2IBLND_KEEPALIVE,
 298                 .procname = "keepalive",
 299                 .data     = &keepalive,
 300                 .maxlen   = sizeof(int),
 301                 .mode     = 0644,
 302                 .proc_handler = &proc_dointvec
 303         },
 304         {
 305                 .ctl_name = O2IBLND_CONCURRENT_SENDS,
 306                 .procname = "concurrent_sends",
 307                 .data     = &concurrent_sends,
 308                 .maxlen   = sizeof(int),
 309                 .mode     = 0444,
 310                 .proc_handler = &proc_dointvec
 311         },
 312         {
 313                 .ctl_name = O2IBLND_IB_MTU,
 314                 .procname = "ib_mtu",
 315                 .data     = &ib_mtu,
 316                 .maxlen   = sizeof(int),
 317                 .mode     = 0444,
 318                 .proc_handler = &proc_dointvec
 319         },
 320         {
 321                 .ctl_name = O2IBLND_MAP_ON_DEMAND,
 322                 .procname = "map_on_demand",
 323                 .data     = &map_on_demand,
 324                 .maxlen   = sizeof(int),
 325                 .mode     = 0444,
 326                 .proc_handler = &proc_dointvec
 327         },
 328
 329         {
 330                 .ctl_name = O2IBLND_FMR_POOL_SIZE,
 331                 .procname = "fmr_pool_size",
 332                 .data     = &fmr_pool_size,
 333                 .maxlen   = sizeof(int),
 334                 .mode     = 0444,
 335                 .proc_handler = &proc_dointvec
 336         },
 337         {
 338                 .ctl_name = O2IBLND_FMR_FLUSH_TRIGGER,
 339                 .procname = "fmr_flush_trigger",
 340                 .data     = &fmr_flush_trigger,
 341                 .maxlen   = sizeof(int),
 342                 .mode     = 0444,
 343                 .proc_handler = &proc_dointvec
 344         },
 345         {
 346                 .ctl_name = O2IBLND_FMR_CACHE,
 347                 .procname = "fmr_cache",
 348                 .data     = &fmr_cache,
 349                 .maxlen   = sizeof(int),
 350                 .mode     = 0444,
 351                 .proc_handler = &proc_dointvec
 352         },
 353         {
 354                 .ctl_name = O2IBLND_PMR_POOL_SIZE,
 355                 .procname = "pmr_pool_size",
 356                 .data     = &pmr_pool_size,
 357                 .maxlen   = sizeof(int),
 358                 .mode     = 0444,
 359                 .proc_handler = &proc_dointvec
 360         },
 361         {0}
 362 };
 363
 364 static cfs_sysctl_table_t kiblnd_top_ctl_table[] = {
 365         {
 366                 .ctl_name = CTL_O2IBLND,
 367                 .procname = "o2iblnd",
 368                 .data     = NULL,
 369                 .maxlen   = 0,
 370                 .mode     = 0555,
 371                 .child    = kiblnd_ctl_table
 372         },
 373         {0}
 374 };
 375
 376 void
 377 kiblnd_initstrtunable(char *space, char *str, int size)
 378 {
 379         strncpy(space, str, size);
 380         space[size-1] = 0;
 381 }
 382
 383 void
 384 kiblnd_sysctl_init (void)
 385 {
 386         kiblnd_initstrtunable(ipif_basename_space, ipif_name,
 387                               sizeof(ipif_basename_space));
 388
 389         kiblnd_tunables.kib_sysctl =
 390                 cfs_register_sysctl_table(kiblnd_top_ctl_table, 0);
 391
 392         if (kiblnd_tunables.kib_sysctl == NULL)
 393                 CWARN("Can't setup /proc tunables\n");
 394 }
 395
 396 void
 397 kiblnd_sysctl_fini (void)
 398 {
 399         if (kiblnd_tunables.kib_sysctl != NULL)
 400                 cfs_unregister_sysctl_table(kiblnd_tunables.kib_sysctl);
 401 }
 402
 403 #else
 404
 405 void
 406 kiblnd_sysctl_init (void)
 407 {
 408 }
 409
 410 void
 411 kiblnd_sysctl_fini (void)
 412 {
 413 }
 414
 415 #endif
 416
 417 int
 418 kiblnd_tunables_init (void)
 419 {
 420         if (*kiblnd_tunables.kib_credits > *kiblnd_tunables.kib_ntx) {
 421                 CERROR("Can't set credits(%d) > ntx(%d)\n",
 422                        *kiblnd_tunables.kib_credits,
 423                        *kiblnd_tunables.kib_ntx);
 424                 return -EINVAL;
 425         }
 426
 427         if (kiblnd_translate_mtu(*kiblnd_tunables.kib_ib_mtu) < 0) {
 428                 CERROR("Invalid ib_mtu %d, expected 256/512/1024/2048/4096\n",
 429                        *kiblnd_tunables.kib_ib_mtu);
 430                 return -EINVAL;
 431         }
 432
 433         if (*kiblnd_tunables.kib_peertxcredits < IBLND_CREDITS_DEFAULT)
 434                 *kiblnd_tunables.kib_peertxcredits = IBLND_CREDITS_DEFAULT;
 435
 436         if (*kiblnd_tunables.kib_peertxcredits > IBLND_CREDITS_MAX)
 437                 *kiblnd_tunables.kib_peertxcredits = IBLND_CREDITS_MAX;
 438
 439         if (*kiblnd_tunables.kib_peercredits_hiw < *kiblnd_tunables.kib_peertxcredits / 2)
 440                 *kiblnd_tunables.kib_peercredits_hiw = *kiblnd_tunables.kib_peertxcredits / 2;
 441
 442         if (*kiblnd_tunables.kib_peercredits_hiw >= *kiblnd_tunables.kib_peertxcredits)
 443                 *kiblnd_tunables.kib_peercredits_hiw = *kiblnd_tunables.kib_peertxcredits - 1;
 444
 445         if (*kiblnd_tunables.kib_map_on_demand < 0 ||
 446             *kiblnd_tunables.kib_map_on_demand >= IBLND_MAX_RDMA_FRAGS)
 447                 *kiblnd_tunables.kib_map_on_demand = 0; /* disable map-on-demand */
 448
 449         if (*kiblnd_tunables.kib_concurrent_sends == 0) {
 450                 if (*kiblnd_tunables.kib_map_on_demand > 0 &&
 451                     *kiblnd_tunables.kib_map_on_demand <= IBLND_MAX_RDMA_FRAGS / 8)
 452                         *kiblnd_tunables.kib_concurrent_sends = (*kiblnd_tunables.kib_peertxcredits) * 2;
 453                 else
 454                         *kiblnd_tunables.kib_concurrent_sends = (*kiblnd_tunables.kib_peertxcredits);
 455         }
 456
 457         if (*kiblnd_tunables.kib_concurrent_sends > *kiblnd_tunables.kib_peertxcredits * 2)
 458                 *kiblnd_tunables.kib_concurrent_sends = *kiblnd_tunables.kib_peertxcredits * 2;
 459
 460         if (*kiblnd_tunables.kib_concurrent_sends < *kiblnd_tunables.kib_peertxcredits / 2)
 461                 *kiblnd_tunables.kib_concurrent_sends = *kiblnd_tunables.kib_peertxcredits / 2;
 462
 463         if (*kiblnd_tunables.kib_concurrent_sends < *kiblnd_tunables.kib_peertxcredits) {
 464                 CWARN("Concurrent sends %d is lower than message queue size: %d, "
 465                       "performance may drop slightly.\n",
 466                       *kiblnd_tunables.kib_concurrent_sends, *kiblnd_tunables.kib_peertxcredits);
 467         }
 468
 469         kiblnd_sysctl_init();
 470         return 0;
 471 }
 472
 473 void
 474 kiblnd_tunables_fini (void)
 475 {
 476         kiblnd_sysctl_fini();
 477 }