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 char *ipif_name = "ib0";
  68 CFS_MODULE_PARM(ipif_name, "s", charp, 0444,
  69                 "IPoIB interface name");
  70
  71 static int retry_count = 5;
  72 CFS_MODULE_PARM(retry_count, "i", int, 0644,
  73                 "Retransmissions when no ACK received");
  74
  75 static int rnr_retry_count = 6;
  76 CFS_MODULE_PARM(rnr_retry_count, "i", int, 0644,
  77                 "RNR retransmissions");
  78
  79 static int keepalive = 100;
  80 CFS_MODULE_PARM(keepalive, "i", int, 0644,
  81                 "Idle time in seconds before sending a keepalive");
  82
  83 static int ib_mtu = 0;
  84 CFS_MODULE_PARM(ib_mtu, "i", int, 0444,
  85                 "IB MTU 256/512/1024/2048/4096");
  86
  87 #if IBLND_MAP_ON_DEMAND
  88 static int concurrent_sends = IBLND_RX_MSGS;
  89 #else
  90 static int concurrent_sends = IBLND_MSG_QUEUE_SIZE;
  91 #endif
  92 CFS_MODULE_PARM(concurrent_sends, "i", int, 0444,
  93                 "send work-queue sizing");
  94
  95 #if IBLND_MAP_ON_DEMAND
  96 static int fmr_pool_size = 512;
  97 CFS_MODULE_PARM(fmr_pool_size, "i", int, 0444,
  98                 "size of the fmr pool (>= ntx)");
  99
 100 static int fmr_flush_trigger = 384;
 101 CFS_MODULE_PARM(fmr_flush_trigger, "i", int, 0444,
 102                 "# dirty FMRs that triggers pool flush");
 103
 104 static int fmr_cache = 1;
 105 CFS_MODULE_PARM(fmr_cache, "i", int, 0444,
 106                 "non-zero to enable FMR caching");
 107 #endif
 108
 109 kib_tunables_t kiblnd_tunables = {
 110         .kib_service                = &service,
 111         .kib_cksum                  = &cksum,
 112         .kib_timeout                = &timeout,
 113         .kib_keepalive              = &keepalive,
 114         .kib_ntx                    = &ntx,
 115         .kib_credits                = &credits,
 116         .kib_peercredits            = &peer_credits,
 117         .kib_default_ipif           = &ipif_name,
 118         .kib_retry_count            = &retry_count,
 119         .kib_rnr_retry_count        = &rnr_retry_count,
 120         .kib_concurrent_sends       = &concurrent_sends,
 121         .kib_ib_mtu                 = &ib_mtu,
 122 #if IBLND_MAP_ON_DEMAND
 123         .kib_fmr_pool_size          = &fmr_pool_size,
 124         .kib_fmr_flush_trigger      = &fmr_flush_trigger,
 125         .kib_fmr_cache              = &fmr_cache,
 126 #endif
 127 };
 128
 129 #if defined(CONFIG_SYSCTL) && !CFS_SYSFS_MODULE_PARM
 130
 131 static char ipif_basename_space[32];
 132
 133 #ifndef HAVE_SYSCTL_UNNUMBERED
 134
 135 enum {
 136         O2IBLND_SERVICE  = 1,
 137         O2IBLND_CKSUM,
 138         O2IBLND_TIMEOUT,
 139         O2IBLND_NTX,
 140         O2IBLND_CREDITS,
 141         O2IBLND_PEER_CREDITS,
 142         O2IBLND_IPIF_BASENAME,
 143         O2IBLND_RETRY_COUNT,
 144         O2IBLND_RNR_RETRY_COUNT,
 145         O2IBLND_KEEPALIVE,
 146         O2IBLND_CONCURRENT_SENDS,
 147         O2IBLND_IB_MTU,
 148         O2IBLND_FMR_POOL_SIZE,
 149         O2IBLND_FMR_FLUSH_TRIGGER,
 150         O2IBLND_FMR_CACHE
 151 };
 152 #else
 153
 154 #define O2IBLND_SERVICE          CTL_UNNUMBERED
 155 #define O2IBLND_CKSUM            CTL_UNNUMBERED
 156 #define O2IBLND_TIMEOUT          CTL_UNNUMBERED
 157 #define O2IBLND_NTX              CTL_UNNUMBERED
 158 #define O2IBLND_CREDITS          CTL_UNNUMBERED
 159 #define O2IBLND_PEER_CREDITS     CTL_UNNUMBERED
 160 #define O2IBLND_IPIF_BASENAME    CTL_UNNUMBERED
 161 #define O2IBLND_RETRY_COUNT      CTL_UNNUMBERED
 162 #define O2IBLND_RNR_RETRY_COUNT  CTL_UNNUMBERED
 163 #define O2IBLND_KEEPALIVE        CTL_UNNUMBERED
 164 #define O2IBLND_CONCURRENT_SENDS CTL_UNNUMBERED
 165 #define O2IBLND_IB_MTU           CTL_UNNUMBERED
 166 #define O2IBLND_FMR_POOL_SIZE    CTL_UNNUMBERED
 167 #define O2IBLND_FMR_FLUSH_TRIGGER CTL_UNNUMBERED
 168 #define O2IBLND_FMR_CACHE        CTL_UNNUMBERED
 169
 170 #endif
 171
 172 static cfs_sysctl_table_t kiblnd_ctl_table[] = {
 173         {
 174                 .ctl_name = O2IBLND_SERVICE,
 175                 .procname = "service",
 176                 .data     = &service,
 177                 .maxlen   = sizeof(int),
 178                 .mode     = 0444,
 179                 .proc_handler = &proc_dointvec
 180         },
 181         {
 182                 .ctl_name = O2IBLND_CKSUM,
 183                 .procname = "cksum",
 184                 .data     = &cksum,
 185                 .maxlen   = sizeof(int),
 186                 .mode     = 0644,
 187                 .proc_handler = &proc_dointvec
 188         },
 189         {
 190                 .ctl_name = O2IBLND_TIMEOUT,
 191                 .procname = "timeout",
 192                 .data     = &timeout,
 193                 .maxlen   = sizeof(int),
 194                 .mode     = 0644,
 195                 .proc_handler = &proc_dointvec
 196         },
 197         {
 198                 .ctl_name = O2IBLND_NTX,
 199                 .procname = "ntx",
 200                 .data     = &ntx,
 201                 .maxlen   = sizeof(int),
 202                 .mode     = 0444,
 203                 .proc_handler = &proc_dointvec
 204         },
 205         {
 206                 .ctl_name = O2IBLND_CREDITS,
 207                 .procname = "credits",
 208                 .data     = &credits,
 209                 .maxlen   = sizeof(int),
 210                 .mode     = 0444,
 211                 .proc_handler = &proc_dointvec
 212         },
 213         {
 214                 .ctl_name = O2IBLND_PEER_CREDITS,
 215                 .procname = "peer_credits",
 216                 .data     = &peer_credits,
 217                 .maxlen   = sizeof(int),
 218                 .mode     = 0444,
 219                 .proc_handler = &proc_dointvec
 220         },
 221         {
 222                 .ctl_name = O2IBLND_IPIF_BASENAME,
 223                 .procname = "ipif_name",
 224                 .data     = ipif_basename_space,
 225                 .maxlen   = sizeof(ipif_basename_space),
 226                 .mode     = 0444,
 227                 .proc_handler = &proc_dostring
 228         },
 229         {
 230                 .ctl_name = O2IBLND_RETRY_COUNT,
 231                 .procname = "retry_count",
 232                 .data     = &retry_count,
 233                 .maxlen   = sizeof(int),
 234                 .mode     = 0644,
 235                 .proc_handler = &proc_dointvec
 236         },
 237         {
 238                 .ctl_name = O2IBLND_RNR_RETRY_COUNT,
 239                 .procname = "rnr_retry_count",
 240                 .data     = &rnr_retry_count,
 241                 .maxlen   = sizeof(int),
 242                 .mode     = 0644,
 243                 .proc_handler = &proc_dointvec
 244         },
 245         {
 246                 .ctl_name = O2IBLND_KEEPALIVE,
 247                 .procname = "keepalive",
 248                 .data     = &keepalive,
 249                 .maxlen   = sizeof(int),
 250                 .mode     = 0644,
 251                 .proc_handler = &proc_dointvec
 252         },
 253         {
 254                 .ctl_name = O2IBLND_CONCURRENT_SENDS,
 255                 .procname = "concurrent_sends",
 256                 .data     = &concurrent_sends,
 257                 .maxlen   = sizeof(int),
 258                 .mode     = 0444,
 259                 .proc_handler = &proc_dointvec
 260         },
 261         {
 262                 .ctl_name = O2IBLND_IB_MTU,
 263                 .procname = "ib_mtu",
 264                 .data     = &ib_mtu,
 265                 .maxlen   = sizeof(int),
 266                 .mode     = 0444,
 267                 .proc_handler = &proc_dointvec
 268         },
 269 #if IBLND_MAP_ON_DEMAND
 270         {
 271                 .ctl_name = O2IBLND_FMR_POOL_SIZE,
 272                 .procname = "fmr_pool_size",
 273                 .data     = &fmr_pool_size,
 274                 .maxlen   = sizeof(int),
 275                 .mode     = 0444,
 276                 .proc_handler = &proc_dointvec
 277         },
 278         {
 279                 .ctl_name = O2IBLND_FMR_FLUSH_TRIGGER,
 280                 .procname = "fmr_flush_trigger",
 281                 .data     = &fmr_flush_trigger,
 282                 .maxlen   = sizeof(int),
 283                 .mode     = 0444,
 284                 .proc_handler = &proc_dointvec
 285         },
 286         {
 287                 .ctl_name = O2IBLND_FMR_CACHE,
 288                 .procname = "fmr_cache",
 289                 .data     = &fmr_cache,
 290                 .maxlen   = sizeof(int),
 291                 .mode     = 0444,
 292                 .proc_handler = &proc_dointvec
 293         },
 294 #endif
 295         {0}
 296 };
 297
 298 static cfs_sysctl_table_t kiblnd_top_ctl_table[] = {
 299         {
 300                 .ctl_name = CTL_O2IBLND,
 301                 .procname = "o2iblnd",
 302                 .data     = NULL,
 303                 .maxlen   = 0,
 304                 .mode     = 0555,
 305                 .child    = kiblnd_ctl_table
 306         },
 307         {0}
 308 };
 309
 310 void
 311 kiblnd_initstrtunable(char *space, char *str, int size)
 312 {
 313         strncpy(space, str, size);
 314         space[size-1] = 0;
 315 }
 316
 317 void
 318 kiblnd_sysctl_init (void)
 319 {
 320         kiblnd_initstrtunable(ipif_basename_space, ipif_name,
 321                               sizeof(ipif_basename_space));
 322
 323         kiblnd_tunables.kib_sysctl =
 324                 cfs_register_sysctl_table(kiblnd_top_ctl_table, 0);
 325
 326         if (kiblnd_tunables.kib_sysctl == NULL)
 327                 CWARN("Can't setup /proc tunables\n");
 328 }
 329
 330 void
 331 kiblnd_sysctl_fini (void)
 332 {
 333         if (kiblnd_tunables.kib_sysctl != NULL)
 334                 cfs_unregister_sysctl_table(kiblnd_tunables.kib_sysctl);
 335 }
 336
 337 #else
 338
 339 void
 340 kiblnd_sysctl_init (void)
 341 {
 342 }
 343
 344 void
 345 kiblnd_sysctl_fini (void)
 346 {
 347 }
 348
 349 #endif
 350
 351 int
 352 kiblnd_tunables_init (void)
 353 {
 354         if (*kiblnd_tunables.kib_credits > *kiblnd_tunables.kib_ntx) {
 355                 CERROR("Can't set credits(%d) > ntx(%d)\n",
 356                        *kiblnd_tunables.kib_credits,
 357                        *kiblnd_tunables.kib_ntx);
 358                 return -EINVAL;
 359         }
 360
 361         if (*kiblnd_tunables.kib_ib_mtu != 0 &&
 362             *kiblnd_tunables.kib_ib_mtu != 256 &&
 363             *kiblnd_tunables.kib_ib_mtu != 512 &&
 364             *kiblnd_tunables.kib_ib_mtu != 1024 &&
 365             *kiblnd_tunables.kib_ib_mtu != 2048 &&
 366             *kiblnd_tunables.kib_ib_mtu != 4096) {
 367                 CERROR("Invalid ib_mtu %d, expected 256/512/1024/2048/4096\n",
 368                        *kiblnd_tunables.kib_ib_mtu);
 369                 return -EINVAL;
 370         }
 371
 372         if (*kiblnd_tunables.kib_concurrent_sends > IBLND_RX_MSGS)
 373                 *kiblnd_tunables.kib_concurrent_sends = IBLND_RX_MSGS;
 374         if (*kiblnd_tunables.kib_concurrent_sends < IBLND_MSG_QUEUE_SIZE / 2)
 375                 *kiblnd_tunables.kib_concurrent_sends = IBLND_MSG_QUEUE_SIZE / 2;
 376
 377         if (*kiblnd_tunables.kib_concurrent_sends < IBLND_MSG_QUEUE_SIZE) {
 378                 CWARN("Concurrent sends %d is lower than message queue size: %d, "
 379                       "performance may drop slightly.\n",
 380                       *kiblnd_tunables.kib_concurrent_sends, IBLND_MSG_QUEUE_SIZE);
 381         }
 382
 383         kiblnd_sysctl_init();
 384         return 0;
 385 }
 386
 387 void
 388 kiblnd_tunables_fini (void)
 389 {
 390         kiblnd_sysctl_fini();
 391 }