2 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
4 * Copyright (c) 2011, 2012, Intel Corporation.
6 * Author: Eric Barton <eric@bartonsoftware.com>
8 * Portals is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Portals is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Portals; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include <linux/kvm_host.h>
25 #if defined(__x86_64__) || defined(__i386__)
26 #include <asm/hypervisor.h>
28 #ifdef HAVE_ETHTOOL_LINK_SETTINGS
29 #include <linux/inetdevice.h>
30 #include <linux/ethtool.h>
33 #define CURRENT_LND_VERSION 1
35 static int sock_timeout;
36 module_param(sock_timeout, int, 0644);
37 MODULE_PARM_DESC(sock_timeout, "dead socket timeout (seconds)");
39 static int credits = DEFAULT_CREDITS;
40 module_param(credits, int, 0444);
41 MODULE_PARM_DESC(credits, "# concurrent sends");
43 static int peer_credits = DEFAULT_PEER_CREDITS;
44 module_param(peer_credits, int, 0444);
45 MODULE_PARM_DESC(peer_credits, "# concurrent sends to 1 peer");
47 static int peer_buffer_credits;
48 module_param(peer_buffer_credits, int, 0444);
49 MODULE_PARM_DESC(peer_buffer_credits, "# per-peer router buffer credits");
51 static int peer_timeout = DEFAULT_PEER_TIMEOUT;
52 module_param(peer_timeout, int, 0444);
53 MODULE_PARM_DESC(peer_timeout, "Seconds without aliveness news to declare peer dead (<=0 to disable)");
55 /* Number of daemons in each thread pool which is percpt,
56 * we will estimate reasonable value based on CPUs if it's not set. */
57 static unsigned int nscheds;
58 module_param(nscheds, int, 0444);
59 MODULE_PARM_DESC(nscheds, "# scheduler daemons in each pool while starting");
61 static int nconnds = 4;
62 module_param(nconnds, int, 0444);
63 MODULE_PARM_DESC(nconnds, "# connection daemons while starting");
65 static int nconnds_max = 64;
66 module_param(nconnds_max, int, 0444);
67 MODULE_PARM_DESC(nconnds_max, "max # connection daemons");
69 static int min_reconnectms = 1000;
70 module_param(min_reconnectms, int, 0644);
71 MODULE_PARM_DESC(min_reconnectms, "min connection retry interval (mS)");
73 static int max_reconnectms = 60000;
74 module_param(max_reconnectms, int, 0644);
75 MODULE_PARM_DESC(max_reconnectms, "max connection retry interval (mS)");
78 module_param(eager_ack, int, 0644);
79 MODULE_PARM_DESC(eager_ack, "send tcp ack packets eagerly");
81 static int typed_conns = 1;
82 module_param(typed_conns, int, 0444);
83 MODULE_PARM_DESC(typed_conns, "use different sockets for bulk");
85 static int min_bulk = (1<<10);
86 module_param(min_bulk, int, 0644);
87 MODULE_PARM_DESC(min_bulk, "smallest 'large' message");
89 # define DEFAULT_BUFFER_SIZE 0
90 static int tx_buffer_size = DEFAULT_BUFFER_SIZE;
91 module_param(tx_buffer_size, int, 0644);
92 MODULE_PARM_DESC(tx_buffer_size, "socket tx buffer size (0 for system default)");
94 static int rx_buffer_size = DEFAULT_BUFFER_SIZE;
95 module_param(rx_buffer_size, int, 0644);
96 MODULE_PARM_DESC(rx_buffer_size, "socket rx buffer size (0 for system default)");
99 module_param(nagle, int, 0644);
100 MODULE_PARM_DESC(nagle, "enable NAGLE?");
102 static int round_robin = 1;
103 module_param(round_robin, int, 0644);
104 MODULE_PARM_DESC(round_robin, "Round robin for multiple interfaces");
106 static int keepalive = 30;
107 module_param(keepalive, int, 0644);
108 MODULE_PARM_DESC(keepalive, "# seconds before send keepalive");
110 static int keepalive_idle = 30;
111 module_param(keepalive_idle, int, 0644);
112 MODULE_PARM_DESC(keepalive_idle, "# idle seconds before probe");
114 #define DEFAULT_KEEPALIVE_COUNT 5
115 static int keepalive_count = DEFAULT_KEEPALIVE_COUNT;
116 module_param(keepalive_count, int, 0644);
117 MODULE_PARM_DESC(keepalive_count, "# missed probes == dead");
119 static int keepalive_intvl = 5;
120 module_param(keepalive_intvl, int, 0644);
121 MODULE_PARM_DESC(keepalive_intvl, "seconds between probes");
123 static int enable_csum = 0;
124 module_param(enable_csum, int, 0644);
125 MODULE_PARM_DESC(enable_csum, "enable check sum");
127 static int inject_csum_error = 0;
128 module_param(inject_csum_error, int, 0644);
129 MODULE_PARM_DESC(inject_csum_error, "set non-zero to inject a checksum error");
131 static int enable_irq_affinity = 0;
132 module_param(enable_irq_affinity, int, 0644);
133 MODULE_PARM_DESC(enable_irq_affinity, "enable IRQ affinity");
135 static int nonblk_zcack = 1;
136 module_param(nonblk_zcack, int, 0644);
137 MODULE_PARM_DESC(nonblk_zcack, "always send ZC-ACK on non-blocking connection");
139 static unsigned int zc_min_payload = (16 << 10);
140 module_param(zc_min_payload, int, 0644);
141 MODULE_PARM_DESC(zc_min_payload, "minimum payload size to zero copy");
143 static unsigned int zc_recv = 0;
144 module_param(zc_recv, int, 0644);
145 MODULE_PARM_DESC(zc_recv, "enable ZC recv for Chelsio driver");
147 static unsigned int zc_recv_min_nfrags = 16;
148 module_param(zc_recv_min_nfrags, int, 0644);
149 MODULE_PARM_DESC(zc_recv_min_nfrags, "minimum # of fragments to enable ZC recv");
151 static unsigned int conns_per_peer = DEFAULT_CONNS_PER_PEER;
152 module_param(conns_per_peer, uint, 0644);
153 MODULE_PARM_DESC(conns_per_peer, "number of connections per peer");
155 #ifdef SOCKNAL_BACKOFF
156 static int backoff_init = 3;
157 module_param(backoff_init, int, 0644);
158 MODULE_PARM_DESC(backoff_init, "seconds for initial tcp backoff");
160 static int backoff_max = 3;
161 module_param(backoff_max, int, 0644);
162 MODULE_PARM_DESC(backoff_max, "seconds for maximum tcp backoff");
165 #if SOCKNAL_VERSION_DEBUG
166 static int protocol = 3;
167 module_param(protocol, int, 0644);
168 MODULE_PARM_DESC(protocol, "protocol version");
171 static inline bool is_native_host(void)
173 #ifdef HAVE_HYPERVISOR_IS_TYPE
174 return hypervisor_is_type(X86_HYPER_NATIVE);
175 #elif defined(__x86_64__) || defined(__i386__)
176 return x86_hyper == NULL;
182 struct ksock_tunables ksocknal_tunables;
183 static struct lnet_ioctl_config_socklnd_tunables default_tunables;
185 #ifdef HAVE_ETHTOOL_LINK_SETTINGS
186 static int ksocklnd_ni_get_eth_intf_speed(struct lnet_ni *ni)
188 struct net_device *dev;
192 DECLARE_CONST_IN_IFADDR(ifa);
194 /* check if ni has interface assigned */
195 if (!ni->ni_net_ns || !ni->ni_interface)
199 for_each_netdev(ni->ni_net_ns, dev) {
200 int flags = dev_get_flags(dev);
201 struct in_device *in_dev;
203 if (flags & IFF_LOOPBACK) /* skip the loopback IF */
206 if (!(flags & IFF_UP))
209 in_dev = __in_dev_get_rcu(dev);
213 in_dev_for_each_ifa_rcu(ifa, in_dev) {
214 if (strcmp(ifa->ifa_label, ni->ni_interface) == 0)
215 intf_idx = dev->ifindex;
223 struct ethtool_link_ksettings cmd;
226 /* Some devices may not be providing link settings */
227 ethtool_ret = __ethtool_get_link_ksettings(dev, &cmd);
229 ret = cmd.base.speed;
238 static int ksocklnd_speed2cpp(int speed)
240 /* Use the minimum of 1Gbps to avoid calling ilog2 with 0 */
244 /* Pick heuristically optimal conns_per_peer value
245 * for the specified ethernet interface speed (Mbps)
247 return ilog2(speed/1000) / 2 + 1;
251 static int ksocklnd_lookup_conns_per_peer(struct lnet_ni *ni)
254 #ifdef HAVE_ETHTOOL_LINK_SETTINGS
255 int speed = ksocklnd_ni_get_eth_intf_speed(ni);
257 if (ni->ni_interface)
258 CDEBUG(D_NET, "intf %s speed %d\n", ni->ni_interface, speed);
261 cpp = ksocklnd_speed2cpp(speed);
266 int ksocknal_tunables_init(void)
268 default_tunables.lnd_version = CURRENT_LND_VERSION;
269 default_tunables.lnd_conns_per_peer = conns_per_peer;
271 /* initialize ksocknal_tunables structure */
272 ksocknal_tunables.ksnd_timeout = &sock_timeout;
273 ksocknal_tunables.ksnd_nscheds = &nscheds;
274 ksocknal_tunables.ksnd_nconnds = &nconnds;
275 ksocknal_tunables.ksnd_nconnds_max = &nconnds_max;
276 ksocknal_tunables.ksnd_min_reconnectms = &min_reconnectms;
277 ksocknal_tunables.ksnd_max_reconnectms = &max_reconnectms;
278 ksocknal_tunables.ksnd_eager_ack = &eager_ack;
279 ksocknal_tunables.ksnd_typed_conns = &typed_conns;
280 ksocknal_tunables.ksnd_min_bulk = &min_bulk;
281 ksocknal_tunables.ksnd_tx_buffer_size = &tx_buffer_size;
282 ksocknal_tunables.ksnd_rx_buffer_size = &rx_buffer_size;
283 ksocknal_tunables.ksnd_nagle = &nagle;
284 ksocknal_tunables.ksnd_round_robin = &round_robin;
285 ksocknal_tunables.ksnd_keepalive = &keepalive;
286 ksocknal_tunables.ksnd_keepalive_idle = &keepalive_idle;
287 ksocknal_tunables.ksnd_keepalive_count = &keepalive_count;
288 ksocknal_tunables.ksnd_keepalive_intvl = &keepalive_intvl;
289 ksocknal_tunables.ksnd_credits = &credits;
290 ksocknal_tunables.ksnd_peertxcredits = &peer_credits;
291 ksocknal_tunables.ksnd_peerrtrcredits = &peer_buffer_credits;
292 ksocknal_tunables.ksnd_peertimeout = &peer_timeout;
293 ksocknal_tunables.ksnd_enable_csum = &enable_csum;
294 ksocknal_tunables.ksnd_inject_csum_error = &inject_csum_error;
295 ksocknal_tunables.ksnd_nonblk_zcack = &nonblk_zcack;
296 ksocknal_tunables.ksnd_zc_min_payload = &zc_min_payload;
297 ksocknal_tunables.ksnd_zc_recv = &zc_recv;
298 ksocknal_tunables.ksnd_zc_recv_min_nfrags = &zc_recv_min_nfrags;
299 if (conns_per_peer > ((1 << SOCKNAL_CONN_COUNT_MAX_BITS)-1)) {
300 CWARN("socklnd conns_per_peer is capped at %u.\n",
301 (1 << SOCKNAL_CONN_COUNT_MAX_BITS)-1);
303 ksocknal_tunables.ksnd_conns_per_peer = &conns_per_peer;
305 if (enable_irq_affinity) {
306 CWARN("irq_affinity is removed from socklnd because modern "
307 "computer always has fast CPUs and more cores than "
308 "# NICs, although you still can set irq_affinity by "
309 "another way, please check manual for details.\n");
311 ksocknal_tunables.ksnd_irq_affinity = &enable_irq_affinity;
313 #ifdef SOCKNAL_BACKOFF
314 ksocknal_tunables.ksnd_backoff_init = &backoff_init;
315 ksocknal_tunables.ksnd_backoff_max = &backoff_max;
318 #if SOCKNAL_VERSION_DEBUG
319 ksocknal_tunables.ksnd_protocol = &protocol;
322 if (*ksocknal_tunables.ksnd_zc_min_payload < (2 << 10))
323 *ksocknal_tunables.ksnd_zc_min_payload = (2 << 10);
325 /* When on a hypervisor set the minimum zero copy size
326 * above the maximum payload size
328 if (!is_native_host())
329 *ksocknal_tunables.ksnd_zc_min_payload = (16 << 20) + 1;
334 void ksocknal_tunables_setup(struct lnet_ni *ni)
336 struct lnet_ioctl_config_socklnd_tunables *tunables;
337 struct lnet_ioctl_config_lnd_cmn_tunables *net_tunables;
339 /* If no tunables specified, setup default tunables */
340 if (!ni->ni_lnd_tunables_set)
341 memcpy(&ni->ni_lnd_tunables.lnd_tun_u.lnd_sock,
342 &default_tunables, sizeof(*tunables));
344 tunables = &ni->ni_lnd_tunables.lnd_tun_u.lnd_sock;
346 /* Current API version */
347 tunables->lnd_version = CURRENT_LND_VERSION;
349 net_tunables = &ni->ni_net->net_tunables;
351 if (net_tunables->lct_peer_timeout == -1)
352 net_tunables->lct_peer_timeout =
353 *ksocknal_tunables.ksnd_peertimeout;
355 if (net_tunables->lct_max_tx_credits == -1)
356 net_tunables->lct_max_tx_credits =
357 *ksocknal_tunables.ksnd_credits;
359 if (net_tunables->lct_peer_tx_credits == -1)
360 net_tunables->lct_peer_tx_credits =
361 *ksocknal_tunables.ksnd_peertxcredits;
363 if (net_tunables->lct_peer_tx_credits >
364 net_tunables->lct_max_tx_credits)
365 net_tunables->lct_peer_tx_credits =
366 net_tunables->lct_max_tx_credits;
368 if (net_tunables->lct_peer_rtr_credits == -1)
369 net_tunables->lct_peer_rtr_credits =
370 *ksocknal_tunables.ksnd_peerrtrcredits;
372 if (!tunables->lnd_conns_per_peer)
373 tunables->lnd_conns_per_peer =
374 ksocklnd_lookup_conns_per_peer(ni);