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
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  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 static cfs_sysctl_table_t kiblnd_ctl_table[] = {
 134         {
 135                 .ctl_name = 1,
 136                 .procname = "service",
 137                 .data     = &service,
 138                 .maxlen   = sizeof(int),
 139                 .mode     = 0444,
 140                 .proc_handler = &proc_dointvec
 141         },
 142         {
 143                 .ctl_name = 2,
 144                 .procname = "cksum",
 145                 .data     = &cksum,
 146                 .maxlen   = sizeof(int),
 147                 .mode     = 0644,
 148                 .proc_handler = &proc_dointvec
 149         },
 150         {
 151                 .ctl_name = 3,
 152                 .procname = "timeout",
 153                 .data     = &timeout,
 154                 .maxlen   = sizeof(int),
 155                 .mode     = 0644,
 156                 .proc_handler = &proc_dointvec
 157         },
 158         {
 159                 .ctl_name = 4,
 160                 .procname = "ntx",
 161                 .data     = &ntx,
 162                 .maxlen   = sizeof(int),
 163                 .mode     = 0444,
 164                 .proc_handler = &proc_dointvec
 165         },
 166         {
 167                 .ctl_name = 5,
 168                 .procname = "credits",
 169                 .data     = &credits,
 170                 .maxlen   = sizeof(int),
 171                 .mode     = 0444,
 172                 .proc_handler = &proc_dointvec
 173         },
 174         {
 175                 .ctl_name = 6,
 176                 .procname = "peer_credits",
 177                 .data     = &peer_credits,
 178                 .maxlen   = sizeof(int),
 179                 .mode     = 0444,
 180                 .proc_handler = &proc_dointvec
 181         },
 182         {
 183                 .ctl_name = 7,
 184                 .procname = "ipif_name",
 185                 .data     = ipif_basename_space,
 186                 .maxlen   = sizeof(ipif_basename_space),
 187                 .mode     = 0444,
 188                 .proc_handler = &proc_dostring
 189         },
 190         {
 191                 .ctl_name = 8,
 192                 .procname = "retry_count",
 193                 .data     = &retry_count,
 194                 .maxlen   = sizeof(int),
 195                 .mode     = 0644,
 196                 .proc_handler = &proc_dointvec
 197         },
 198         {
 199                 .ctl_name = 9,
 200                 .procname = "rnr_retry_count",
 201                 .data     = &rnr_retry_count,
 202                 .maxlen   = sizeof(int),
 203                 .mode     = 0644,
 204                 .proc_handler = &proc_dointvec
 205         },
 206         {
 207                 .ctl_name = 10,
 208                 .procname = "keepalive",
 209                 .data     = &keepalive,
 210                 .maxlen   = sizeof(int),
 211                 .mode     = 0644,
 212                 .proc_handler = &proc_dointvec
 213         },
 214         {
 215                 .ctl_name = 11,
 216                 .procname = "concurrent_sends",
 217                 .data     = &concurrent_sends,
 218                 .maxlen   = sizeof(int),
 219                 .mode     = 0444,
 220                 .proc_handler = &proc_dointvec
 221         },
 222         {
 223                 .ctl_name = 12,
 224                 .procname = "ib_mtu",
 225                 .data     = &ib_mtu,
 226                 .maxlen   = sizeof(int),
 227                 .mode     = 0444,
 228                 .proc_handler = &proc_dointvec
 229         },
 230 #if IBLND_MAP_ON_DEMAND
 231         {
 232                 .ctl_name = 13,
 233                 .procname = "fmr_pool_size",
 234                 .data     = &fmr_pool_size,
 235                 .maxlen   = sizeof(int),
 236                 .mode     = 0444,
 237                 .proc_handler = &proc_dointvec
 238         },
 239         {
 240                 .ctl_name = 14,
 241                 .procname = "fmr_flush_trigger",
 242                 .data     = &fmr_flush_trigger,
 243                 .maxlen   = sizeof(int),
 244                 .mode     = 0444,
 245                 .proc_handler = &proc_dointvec
 246         },
 247         {
 248                 .ctl_name = 15,
 249                 .procname = "fmr_cache",
 250                 .data     = &fmr_cache,
 251                 .maxlen   = sizeof(int),
 252                 .mode     = 0444,
 253                 .proc_handler = &proc_dointvec
 254         },
 255 #endif
 256         {0}
 257 };
 258
 259 static cfs_sysctl_table_t kiblnd_top_ctl_table[] = {
 260         {
 261                 .ctl_name = 203,
 262                 .procname = "o2iblnd",
 263                 .data     = NULL,
 264                 .maxlen   = 0,
 265                 .mode     = 0555,
 266                 .child    = kiblnd_ctl_table
 267         },
 268         {0}
 269 };
 270
 271 void
 272 kiblnd_initstrtunable(char *space, char *str, int size)
 273 {
 274         strncpy(space, str, size);
 275         space[size-1] = 0;
 276 }
 277
 278 void
 279 kiblnd_sysctl_init (void)
 280 {
 281         kiblnd_initstrtunable(ipif_basename_space, ipif_name,
 282                               sizeof(ipif_basename_space));
 283
 284         kiblnd_tunables.kib_sysctl =
 285                 cfs_register_sysctl_table(kiblnd_top_ctl_table, 0);
 286
 287         if (kiblnd_tunables.kib_sysctl == NULL)
 288                 CWARN("Can't setup /proc tunables\n");
 289 }
 290
 291 void
 292 kiblnd_sysctl_fini (void)
 293 {
 294         if (kiblnd_tunables.kib_sysctl != NULL)
 295                 cfs_unregister_sysctl_table(kiblnd_tunables.kib_sysctl);
 296 }
 297
 298 #else
 299
 300 void
 301 kiblnd_sysctl_init (void)
 302 {
 303 }
 304
 305 void
 306 kiblnd_sysctl_fini (void)
 307 {
 308 }
 309
 310 #endif
 311
 312 int
 313 kiblnd_tunables_init (void)
 314 {
 315         kiblnd_sysctl_init();
 316
 317         if (*kiblnd_tunables.kib_concurrent_sends > IBLND_RX_MSGS)
 318                 *kiblnd_tunables.kib_concurrent_sends = IBLND_RX_MSGS;
 319         if (*kiblnd_tunables.kib_concurrent_sends < IBLND_MSG_QUEUE_SIZE / 2)
 320                 *kiblnd_tunables.kib_concurrent_sends = IBLND_MSG_QUEUE_SIZE / 2;
 321
 322         if (*kiblnd_tunables.kib_concurrent_sends < IBLND_MSG_QUEUE_SIZE) {
 323                 CWARN("Concurrent sends %d is lower than message queue size: %d, "
 324                       "performance may drop slightly.\n",
 325                       *kiblnd_tunables.kib_concurrent_sends, IBLND_MSG_QUEUE_SIZE);
 326         }
 327
 328         return 0;
 329 }
 330
 331 void
 332 kiblnd_tunables_fini (void)
 333 {
 334         kiblnd_sysctl_fini();
 335 }