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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lnet/klnds/o2iblnd/o2iblnd_modparams.c
34 * Author: Eric Barton <eric@bartonsoftware.com>
39 static int service = 987;
40 module_param(service, int, 0444);
41 MODULE_PARM_DESC(service, "service number (within RDMA_PS_TCP)");
44 module_param(cksum, int, 0644);
45 MODULE_PARM_DESC(cksum, "set non-zero to enable message (not RDMA) checksums");
47 static int timeout = 50;
48 module_param(timeout, int, 0644);
49 MODULE_PARM_DESC(timeout, "timeout (seconds)");
51 /* Number of threads in each scheduler pool which is percpt,
52 * we will estimate reasonable value based on CPUs if it's set to zero. */
54 module_param(nscheds, int, 0444);
55 MODULE_PARM_DESC(nscheds, "number of threads in each scheduler pool");
57 /* NB: this value is shared by all CPTs, it can grow at runtime */
59 module_param(ntx, int, 0444);
60 MODULE_PARM_DESC(ntx, "# of message descriptors allocated for each pool");
62 /* NB: this value is shared by all CPTs */
63 static int credits = 256;
64 module_param(credits, int, 0444);
65 MODULE_PARM_DESC(credits, "# concurrent sends");
67 static int peer_credits = 8;
68 module_param(peer_credits, int, 0444);
69 MODULE_PARM_DESC(peer_credits, "# concurrent sends to 1 peer");
71 static int peer_credits_hiw = 0;
72 module_param(peer_credits_hiw, int, 0444);
73 MODULE_PARM_DESC(peer_credits_hiw, "when eagerly to return credits");
75 static int peer_buffer_credits = 0;
76 module_param(peer_buffer_credits, int, 0444);
77 MODULE_PARM_DESC(peer_buffer_credits, "# per-peer router buffer credits");
79 static int peer_timeout = 180;
80 module_param(peer_timeout, int, 0444);
81 MODULE_PARM_DESC(peer_timeout, "Seconds without aliveness news to declare peer dead (<=0 to disable)");
83 static char *ipif_name = "ib0";
84 module_param(ipif_name, charp, 0444);
85 MODULE_PARM_DESC(ipif_name, "IPoIB interface name");
87 static int retry_count = 5;
88 module_param(retry_count, int, 0644);
89 MODULE_PARM_DESC(retry_count, "Retransmissions when no ACK received");
91 static int rnr_retry_count = 6;
92 module_param(rnr_retry_count, int, 0644);
93 MODULE_PARM_DESC(rnr_retry_count, "RNR retransmissions");
95 static int keepalive = 100;
96 module_param(keepalive, int, 0644);
97 MODULE_PARM_DESC(keepalive, "Idle time in seconds before sending a keepalive");
100 module_param(ib_mtu, int, 0444);
101 MODULE_PARM_DESC(ib_mtu, "IB MTU 256/512/1024/2048/4096");
103 static int concurrent_sends;
104 module_param(concurrent_sends, int, 0444);
105 MODULE_PARM_DESC(concurrent_sends, "send work-queue sizing");
107 #ifdef HAVE_IB_GET_DMA_MR
108 #define IBLND_DEFAULT_MAP_ON_DEMAND 0
109 #define IBLND_MIN_MAP_ON_DEMAND 0
111 #define IBLND_DEFAULT_MAP_ON_DEMAND IBLND_MAX_RDMA_FRAGS
112 #define IBLND_MIN_MAP_ON_DEMAND 1
114 static int map_on_demand = IBLND_DEFAULT_MAP_ON_DEMAND;
115 module_param(map_on_demand, int, 0444);
116 MODULE_PARM_DESC(map_on_demand, "map on demand");
118 /* NB: this value is shared by all CPTs, it can grow at runtime */
119 static int fmr_pool_size = 512;
120 module_param(fmr_pool_size, int, 0444);
121 MODULE_PARM_DESC(fmr_pool_size, "size of fmr pool on each CPT (>= ntx / 4)");
123 /* NB: this value is shared by all CPTs, it can grow at runtime */
124 static int fmr_flush_trigger = 384;
125 module_param(fmr_flush_trigger, int, 0444);
126 MODULE_PARM_DESC(fmr_flush_trigger, "# dirty FMRs that triggers pool flush");
128 static int fmr_cache = 1;
129 module_param(fmr_cache, int, 0444);
130 MODULE_PARM_DESC(fmr_cache, "non-zero to enable FMR caching");
133 * 0: disable failover
134 * 1: enable failover if necessary
135 * 2: force to failover (for debug)
137 static int dev_failover = 0;
138 module_param(dev_failover, int, 0444);
139 MODULE_PARM_DESC(dev_failover, "HCA failover for bonding (0 off, 1 on, other values reserved)");
141 static int require_privileged_port;
142 module_param(require_privileged_port, int, 0644);
143 MODULE_PARM_DESC(require_privileged_port, "require privileged port when accepting connection");
145 static int use_privileged_port = 1;
146 module_param(use_privileged_port, int, 0644);
147 MODULE_PARM_DESC(use_privileged_port, "use privileged port when initiating connection");
149 static unsigned int wrq_sge = 1;
150 module_param(wrq_sge, uint, 0444);
151 MODULE_PARM_DESC(wrq_sge, "# scatter/gather element per work request");
153 kib_tunables_t kiblnd_tunables = {
154 .kib_dev_failover = &dev_failover,
155 .kib_service = &service,
157 .kib_timeout = &timeout,
158 .kib_keepalive = &keepalive,
160 .kib_default_ipif = &ipif_name,
161 .kib_retry_count = &retry_count,
162 .kib_rnr_retry_count = &rnr_retry_count,
163 .kib_ib_mtu = &ib_mtu,
164 .kib_require_priv_port = &require_privileged_port,
165 .kib_use_priv_port = &use_privileged_port,
166 .kib_nscheds = &nscheds,
167 .kib_wrq_sge = &wrq_sge,
170 static struct lnet_ioctl_config_o2iblnd_tunables default_tunables;
172 /* # messages/RDMAs in-flight */
174 kiblnd_msg_queue_size(int version, struct lnet_ni *ni)
176 if (version == IBLND_MSG_VERSION_1)
177 return IBLND_MSG_QUEUE_SIZE_V1;
179 return ni->ni_net->net_tunables.lct_peer_tx_credits;
185 kiblnd_tunables_setup(struct lnet_ni *ni)
187 struct lnet_ioctl_config_o2iblnd_tunables *tunables;
188 struct lnet_ioctl_config_lnd_cmn_tunables *net_tunables;
191 * if there was no tunables specified, setup the tunables to be
194 if (!ni->ni_lnd_tunables_set)
195 memcpy(&ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib,
196 &default_tunables, sizeof(*tunables));
198 tunables = &ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib;
200 /* Current API version */
201 tunables->lnd_version = 0;
203 if (kiblnd_translate_mtu(*kiblnd_tunables.kib_ib_mtu) < 0) {
204 CERROR("Invalid ib_mtu %d, expected 256/512/1024/2048/4096\n",
205 *kiblnd_tunables.kib_ib_mtu);
209 net_tunables = &ni->ni_net->net_tunables;
211 if (net_tunables->lct_peer_timeout == -1)
212 net_tunables->lct_peer_timeout = peer_timeout;
214 if (net_tunables->lct_max_tx_credits == -1)
215 net_tunables->lct_max_tx_credits = credits;
217 if (net_tunables->lct_peer_tx_credits == -1)
218 net_tunables->lct_peer_tx_credits = peer_credits;
220 if (net_tunables->lct_peer_rtr_credits == -1)
221 net_tunables->lct_peer_rtr_credits = peer_buffer_credits;
223 if (net_tunables->lct_peer_tx_credits < IBLND_CREDITS_DEFAULT)
224 net_tunables->lct_peer_tx_credits = IBLND_CREDITS_DEFAULT;
226 if (net_tunables->lct_peer_tx_credits > IBLND_CREDITS_MAX)
227 net_tunables->lct_peer_tx_credits = IBLND_CREDITS_MAX;
229 if (net_tunables->lct_peer_tx_credits >
230 net_tunables->lct_max_tx_credits)
231 net_tunables->lct_peer_tx_credits =
232 net_tunables->lct_max_tx_credits;
234 if (!tunables->lnd_peercredits_hiw)
235 tunables->lnd_peercredits_hiw = peer_credits_hiw;
237 if (tunables->lnd_peercredits_hiw < net_tunables->lct_peer_tx_credits / 2)
238 tunables->lnd_peercredits_hiw = net_tunables->lct_peer_tx_credits / 2;
240 if (tunables->lnd_peercredits_hiw >= net_tunables->lct_peer_tx_credits)
241 tunables->lnd_peercredits_hiw = net_tunables->lct_peer_tx_credits - 1;
243 if (tunables->lnd_map_on_demand < IBLND_MIN_MAP_ON_DEMAND ||
244 tunables->lnd_map_on_demand > IBLND_MAX_RDMA_FRAGS) {
245 /* Use the default */
246 CWARN("Invalid map_on_demand (%d), expects %d - %d. Using default of %d\n",
247 tunables->lnd_map_on_demand, IBLND_MIN_MAP_ON_DEMAND,
248 IBLND_MAX_RDMA_FRAGS, IBLND_DEFAULT_MAP_ON_DEMAND);
249 tunables->lnd_map_on_demand = IBLND_DEFAULT_MAP_ON_DEMAND;
252 if (tunables->lnd_map_on_demand == 1) {
253 /* don't make sense to create map if only one fragment */
254 tunables->lnd_map_on_demand = 2;
257 if (tunables->lnd_concurrent_sends == 0) {
258 if (tunables->lnd_map_on_demand > 0 &&
259 tunables->lnd_map_on_demand <= IBLND_MAX_RDMA_FRAGS / 8) {
260 tunables->lnd_concurrent_sends =
261 net_tunables->lct_peer_tx_credits * 2;
263 tunables->lnd_concurrent_sends =
264 net_tunables->lct_peer_tx_credits;
268 if (tunables->lnd_concurrent_sends > net_tunables->lct_peer_tx_credits * 2)
269 tunables->lnd_concurrent_sends = net_tunables->lct_peer_tx_credits * 2;
271 if (tunables->lnd_concurrent_sends < net_tunables->lct_peer_tx_credits / 2)
272 tunables->lnd_concurrent_sends = net_tunables->lct_peer_tx_credits / 2;
274 if (tunables->lnd_concurrent_sends < net_tunables->lct_peer_tx_credits) {
275 CWARN("Concurrent sends %d is lower than message "
276 "queue size: %d, performance may drop slightly.\n",
277 tunables->lnd_concurrent_sends,
278 net_tunables->lct_peer_tx_credits);
281 if (!tunables->lnd_fmr_pool_size)
282 tunables->lnd_fmr_pool_size = fmr_pool_size;
283 if (!tunables->lnd_fmr_flush_trigger)
284 tunables->lnd_fmr_flush_trigger = fmr_flush_trigger;
285 if (!tunables->lnd_fmr_cache)
286 tunables->lnd_fmr_cache = fmr_cache;
292 kiblnd_tunables_init(void)
294 default_tunables.lnd_version = 0;
295 default_tunables.lnd_peercredits_hiw = peer_credits_hiw,
296 default_tunables.lnd_map_on_demand = map_on_demand;
297 default_tunables.lnd_concurrent_sends = concurrent_sends;
298 default_tunables.lnd_fmr_pool_size = fmr_pool_size;
299 default_tunables.lnd_fmr_flush_trigger = fmr_flush_trigger;
300 default_tunables.lnd_fmr_cache = fmr_cache;