1 /* Copyright (c) 2011, 2012, 2013, 2014 Nicira, Inc.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
22 #include "ofp-actions.h"
28 #define MAX_SLAVES 8 /* Maximum supported by this test framework. */
39 struct slave slaves[MAX_SLAVES];
43 slave_lookup(struct slave_group *sg, ofp_port_t slave_id)
47 for (i = 0; i < sg->n_slaves; i++) {
48 if (sg->slaves[i].slave_id == slave_id) {
49 return &sg->slaves[i];
57 slave_enabled_cb(ofp_port_t slave_id, void *aux)
61 slave = slave_lookup(aux, slave_id);
62 return slave ? slave->enabled : false;
65 static struct ofpact_bundle *
66 parse_bundle_actions(char *actions)
68 struct ofpact_bundle *bundle;
69 struct ofpbuf ofpacts;
70 struct ofpact *action;
73 ofpbuf_init(&ofpacts, 0);
74 error = bundle_parse_load(actions, &ofpacts);
76 ovs_fatal(0, "%s", error);
79 action = ofpacts.data;
80 bundle = ofpact_get_BUNDLE(xmemdup(action, action->len));
81 ofpbuf_uninit(&ofpacts);
83 if (bundle->n_slaves > MAX_SLAVES) {
84 ovs_fatal(0, "At most %u slaves are supported", MAX_SLAVES);
91 mask_str(uint8_t mask, size_t n_bits)
96 n_bits = MIN(n_bits, 8);
97 for (i = 0; i < n_bits; i++) {
98 str[i] = (1 << i) & mask ? '1' : '0';
106 test_bundle_main(int argc, char *argv[])
109 struct ofpact_bundle *bundle;
111 size_t i, n_permute, old_n_enabled;
112 struct slave_group sg;
115 set_program_name(argv[0]);
118 ovs_fatal(0, "usage: %s bundle_action", program_name);
121 bundle = parse_bundle_actions(argv[1]);
123 /* Generate 'slaves' array. */
125 for (i = 0; i < bundle->n_slaves; i++) {
126 ofp_port_t slave_id = bundle->slaves[i];
128 if (slave_lookup(&sg, slave_id)) {
129 ovs_fatal(0, "Redundant slaves are not supported. ");
132 sg.slaves[sg.n_slaves].slave_id = slave_id;
136 /* Generate flows. */
137 flows = xmalloc(N_FLOWS * sizeof *flows);
138 for (i = 0; i < N_FLOWS; i++) {
139 flow_random_hash_fields(&flows[i]);
140 flows[i].regs[0] = ofp_to_u16(OFPP_NONE);
143 /* Cycles through each possible liveness permutation for the given
144 * n_slaves. The initial state is equivalent to all slaves down, so we
145 * skip it by starting at i = 1. We do one extra iteration to cover
146 * transitioning from the final state back to the initial state. */
149 n_permute = 1 << sg.n_slaves;
150 for (i = 1; i <= n_permute + 1; i++) {
152 size_t j, n_enabled, changed;
153 double disruption, perfect;
157 mask = i % n_permute;
159 /* Gray coding ensures that in each iteration exactly one slave
160 * changes its liveness. This makes the expected disruption a bit
161 * easier to calculate, and is likely similar to how failures will be
162 * experienced in the wild. */
163 mask = mask ^ (mask >> 1);
165 /* Initialize slaves. */
167 for (j = 0; j < sg.n_slaves; j++) {
168 slave = &sg.slaves[j];
169 slave->flow_count = 0;
170 slave->enabled = ((1 << j) & mask) != 0;
172 if (slave->enabled) {
178 for (j = 0; j < sg.n_slaves; j++) {
179 if (sg.slaves[j].enabled) {
186 for (j = 0; j < N_FLOWS; j++) {
187 struct flow *flow = &flows[j];
188 ofp_port_t old_slave_id, ofp_port;
189 struct flow_wildcards wc;
191 old_slave_id = u16_to_ofp(flow->regs[0]);
192 ofp_port = bundle_execute(bundle, flow, &wc, slave_enabled_cb,
194 flow->regs[0] = ofp_to_u16(ofp_port);
196 if (ofp_port != OFPP_NONE) {
197 slave_lookup(&sg, ofp_port)->flow_count++;
200 if (old_slave_id != ofp_port) {
205 if (bundle->algorithm == NX_BD_ALG_ACTIVE_BACKUP) {
206 perfect = active == old_active ? 0.0 : 1.0;
208 if (old_n_enabled || n_enabled) {
209 perfect = 1.0 / MAX(old_n_enabled, n_enabled);
211 /* This will happen when 'sg.n_slaves' is 0. */
216 disruption = changed / (double)N_FLOWS;
217 printf("%s: disruption=%.2f (perfect=%.2f)",
218 mask_str(mask, sg.n_slaves), disruption, perfect);
220 for (j = 0 ; j < sg.n_slaves; j++) {
221 struct slave *slave = &sg.slaves[j];
224 flow_percent = slave->flow_count / (double)N_FLOWS;
225 printf( " %.2f", flow_percent);
227 if (slave->enabled) {
230 if (bundle->algorithm == NX_BD_ALG_ACTIVE_BACKUP) {
231 perfect_fp = j == active ? 1.0 : 0.0;
233 perfect_fp = 1.0 / n_enabled;
236 if (fabs(flow_percent - perfect_fp) >= .01) {
237 fprintf(stderr, "%s: slave %d: flow_percentage=%.5f for"
238 " differs from perfect=%.5f by more than .01\n",
239 mask_str(mask, sg.n_slaves), slave->slave_id,
240 flow_percent, perfect_fp);
243 } else if (slave->flow_count) {
244 fprintf(stderr, "%s: slave %d: disabled slave received"
245 " flows.\n", mask_str(mask, sg.n_slaves),
252 if (fabs(disruption - perfect) >= .01) {
253 fprintf(stderr, "%s: disruption=%.5f differs from perfect=%.5f by"
254 " more than .01\n", mask_str(mask, sg.n_slaves),
255 disruption, perfect);
260 old_n_enabled = n_enabled;
268 OVSTEST_REGISTER("test-bundle", test_bundle_main);