4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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,
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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).
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
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21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lnet/klnds/o2iblnd/o2iblnd_modparams.c
38 * Author: Eric Barton <eric@bartonsoftware.com>
43 static int service = 987;
44 CFS_MODULE_PARM(service, "i", int, 0444,
45 "service number (within RDMA_PS_TCP)");
48 CFS_MODULE_PARM(cksum, "i", int, 0644,
49 "set non-zero to enable message (not RDMA) checksums");
51 static int timeout = 50;
52 CFS_MODULE_PARM(timeout, "i", int, 0644,
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. */
58 CFS_MODULE_PARM(nscheds, "i", int, 0444,
59 "number of threads in each scheduler pool");
61 /* NB: this value is shared by all CPTs, it can grow at runtime */
63 CFS_MODULE_PARM(ntx, "i", int, 0444,
64 "# of message descriptors allocated for each pool");
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");
71 static int peer_credits = 8;
72 CFS_MODULE_PARM(peer_credits, "i", int, 0444,
73 "# concurrent sends to 1 peer");
75 static int peer_credits_hiw = 0;
76 CFS_MODULE_PARM(peer_credits_hiw, "i", int, 0444,
77 "when eagerly to return credits");
79 static int peer_buffer_credits = 0;
80 CFS_MODULE_PARM(peer_buffer_credits, "i", int, 0444,
81 "# per-peer router buffer credits");
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)");
87 static char *ipif_name = "ib0";
88 CFS_MODULE_PARM(ipif_name, "s", charp, 0444,
89 "IPoIB interface name");
91 static int retry_count = 5;
92 CFS_MODULE_PARM(retry_count, "i", int, 0644,
93 "Retransmissions when no ACK received");
95 static int rnr_retry_count = 6;
96 CFS_MODULE_PARM(rnr_retry_count, "i", int, 0644,
97 "RNR retransmissions");
99 static int keepalive = 100;
100 CFS_MODULE_PARM(keepalive, "i", int, 0644,
101 "Idle time in seconds before sending a keepalive");
103 static int ib_mtu = 0;
104 CFS_MODULE_PARM(ib_mtu, "i", int, 0444,
105 "IB MTU 256/512/1024/2048/4096");
107 static int concurrent_sends = 0;
108 CFS_MODULE_PARM(concurrent_sends, "i", int, 0444,
109 "send work-queue sizing");
111 static int map_on_demand = 0;
112 CFS_MODULE_PARM(map_on_demand, "i", int, 0444,
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)");
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");
125 static int fmr_cache = 1;
126 CFS_MODULE_PARM(fmr_cache, "i", int, 0444,
127 "non-zero to enable FMR caching");
130 * 0: disable failover
131 * 1: enable failover if necessary
132 * 2: force to failover (for debug)
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)");
139 static int require_privileged_port = 0;
140 CFS_MODULE_PARM(require_privileged_port, "i", int, 0644,
141 "require privileged port when accepting connection");
143 static int use_privileged_port = 1;
144 CFS_MODULE_PARM(use_privileged_port, "i", int, 0644,
145 "use privileged port when initiating connection");
147 kib_tunables_t kiblnd_tunables = {
148 .kib_dev_failover = &dev_failover,
149 .kib_service = &service,
151 .kib_timeout = &timeout,
152 .kib_keepalive = &keepalive,
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
173 #if defined(CONFIG_SYSCTL) && !CFS_SYSFS_MODULE_PARM
175 static char ipif_basename_space[32];
177 static struct ctl_table kiblnd_ctl_table[] = {
180 .procname = "service",
182 .maxlen = sizeof(int),
184 .proc_handler = &proc_dointvec
190 .maxlen = sizeof(int),
192 .proc_handler = &proc_dointvec
196 .procname = "timeout",
198 .maxlen = sizeof(int),
200 .proc_handler = &proc_dointvec
206 .maxlen = sizeof(int),
208 .proc_handler = &proc_dointvec
212 .procname = "credits",
214 .maxlen = sizeof(int),
216 .proc_handler = &proc_dointvec
220 .procname = "peer_credits",
221 .data = &peer_credits,
222 .maxlen = sizeof(int),
224 .proc_handler = &proc_dointvec
228 .procname = "peer_credits_hiw",
229 .data = &peer_credits_hiw,
230 .maxlen = sizeof(int),
232 .proc_handler = &proc_dointvec
236 .procname = "peer_buffer_credits",
237 .data = &peer_buffer_credits,
238 .maxlen = sizeof(int),
240 .proc_handler = &proc_dointvec
244 .procname = "peer_timeout",
245 .data = &peer_timeout,
246 .maxlen = sizeof(int),
248 .proc_handler = &proc_dointvec
252 .procname = "ipif_name",
253 .data = ipif_basename_space,
254 .maxlen = sizeof(ipif_basename_space),
256 .proc_handler = &proc_dostring
260 .procname = "retry_count",
261 .data = &retry_count,
262 .maxlen = sizeof(int),
264 .proc_handler = &proc_dointvec
268 .procname = "rnr_retry_count",
269 .data = &rnr_retry_count,
270 .maxlen = sizeof(int),
272 .proc_handler = &proc_dointvec
276 .procname = "keepalive",
278 .maxlen = sizeof(int),
280 .proc_handler = &proc_dointvec
284 .procname = "concurrent_sends",
285 .data = &concurrent_sends,
286 .maxlen = sizeof(int),
288 .proc_handler = &proc_dointvec
292 .procname = "ib_mtu",
294 .maxlen = sizeof(int),
296 .proc_handler = &proc_dointvec
300 .procname = "map_on_demand",
301 .data = &map_on_demand,
302 .maxlen = sizeof(int),
304 .proc_handler = &proc_dointvec
308 .procname = "fmr_pool_size",
309 .data = &fmr_pool_size,
310 .maxlen = sizeof(int),
312 .proc_handler = &proc_dointvec
316 .procname = "fmr_flush_trigger",
317 .data = &fmr_flush_trigger,
318 .maxlen = sizeof(int),
320 .proc_handler = &proc_dointvec
324 .procname = "fmr_cache",
326 .maxlen = sizeof(int),
328 .proc_handler = &proc_dointvec
332 .procname = "dev_failover",
333 .data = &dev_failover,
334 .maxlen = sizeof(int),
336 .proc_handler = &proc_dointvec
341 static struct ctl_table kiblnd_top_ctl_table[] = {
344 .procname = "o2iblnd",
348 .child = kiblnd_ctl_table
354 kiblnd_initstrtunable(char *space, char *str, int size)
356 strncpy(space, str, size);
361 kiblnd_sysctl_init (void)
363 kiblnd_initstrtunable(ipif_basename_space, ipif_name,
364 sizeof(ipif_basename_space));
366 kiblnd_tunables.kib_sysctl =
367 register_sysctl_table(kiblnd_top_ctl_table);
369 if (kiblnd_tunables.kib_sysctl == NULL)
370 CWARN("Can't setup /proc tunables\n");
374 kiblnd_sysctl_fini (void)
376 if (kiblnd_tunables.kib_sysctl != NULL)
377 unregister_sysctl_table(kiblnd_tunables.kib_sysctl);
383 kiblnd_sysctl_init (void)
388 kiblnd_sysctl_fini (void)
395 kiblnd_tunables_init (void)
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);
403 if (*kiblnd_tunables.kib_peertxcredits < IBLND_CREDITS_DEFAULT)
404 *kiblnd_tunables.kib_peertxcredits = IBLND_CREDITS_DEFAULT;
406 if (*kiblnd_tunables.kib_peertxcredits > IBLND_CREDITS_MAX)
407 *kiblnd_tunables.kib_peertxcredits = IBLND_CREDITS_MAX;
409 if (*kiblnd_tunables.kib_peertxcredits > *kiblnd_tunables.kib_credits)
410 *kiblnd_tunables.kib_peertxcredits = *kiblnd_tunables.kib_credits;
412 if (*kiblnd_tunables.kib_peercredits_hiw < *kiblnd_tunables.kib_peertxcredits / 2)
413 *kiblnd_tunables.kib_peercredits_hiw = *kiblnd_tunables.kib_peertxcredits / 2;
415 if (*kiblnd_tunables.kib_peercredits_hiw >= *kiblnd_tunables.kib_peertxcredits)
416 *kiblnd_tunables.kib_peercredits_hiw = *kiblnd_tunables.kib_peertxcredits - 1;
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 */
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 */
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;
430 *kiblnd_tunables.kib_concurrent_sends = (*kiblnd_tunables.kib_peertxcredits);
433 if (*kiblnd_tunables.kib_concurrent_sends > *kiblnd_tunables.kib_peertxcredits * 2)
434 *kiblnd_tunables.kib_concurrent_sends = *kiblnd_tunables.kib_peertxcredits * 2;
436 if (*kiblnd_tunables.kib_concurrent_sends < *kiblnd_tunables.kib_peertxcredits / 2)
437 *kiblnd_tunables.kib_concurrent_sends = *kiblnd_tunables.kib_peertxcredits / 2;
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);
445 kiblnd_sysctl_init();
450 kiblnd_tunables_fini (void)
452 kiblnd_sysctl_fini();