1 /* Copyright g(c) 2019-2021. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "simgrid/s4u.hpp"
7 #include "xbt/asserts.h"
10 XBT_LOG_NEW_DEFAULT_CATEGORY(ptask_L07_tes, "[usage] ptask_LO7 <platform-file>");
12 namespace sg4 = simgrid::s4u;
14 /* We need a separate actor so that it can sleep after each test */
15 static void main_dispatcher()
17 const sg4::Engine* e = sg4::Engine::get_instance();
20 std::vector<sg4::Host*> hosts = e->get_all_hosts();
22 XBT_INFO("TEST: Create and run a sequential execution.");
23 XBT_INFO("------------------------------------------------------------");
24 XBT_INFO("Have to compute 1 flop on a 1 flop/s host.");
25 XBT_INFO("Should be done in exactly one second.");
26 start_time = sg4::Engine::get_clock();
27 sg4::Exec::init()->set_flops_amount(1)->set_host(hosts[0])->wait();
28 end_time = sg4::Engine::get_clock();
29 XBT_INFO("Actual result: computing 1 flop at 1 flop/s takes %.2f seconds.", end_time - start_time);
32 sg4::this_actor::sleep_for(5);
34 XBT_INFO("TEST: Create and run two concurrent sequential executions.");
35 XBT_INFO("------------------------------------------------------------");
36 XBT_INFO("Have to compute 2 x 1 flop on a 1 flop/s host.");
37 XBT_INFO("Should be done in exactly 2 seconds because of sharing.");
38 start_time = sg4::Engine::get_clock();
39 sg4::ExecPtr e1 = sg4::Exec::init()->set_flops_amount(1)->set_host(hosts[0])->start();
40 sg4::ExecPtr e2 = sg4::Exec::init()->set_flops_amount(1)->set_host(hosts[0])->start();
43 end_time = sg4::Engine::get_clock();
44 XBT_INFO("Actual result: computing 2x1 flop at 1 flop/s takes %.2f seconds.", end_time - start_time);
47 sg4::this_actor::sleep_for(5);
49 XBT_INFO("TEST: Create and run a parallel execution on 2 homogeneous hosts.");
50 XBT_INFO("------------------------------------------------------------");
51 XBT_INFO("Have to compute 2 flops across two hosts running at 1 flop/s.");
52 XBT_INFO("Should be done in exactly one second.");
53 start_time = sg4::Engine::get_clock();
54 sg4::Exec::init()->set_flops_amounts(std::vector<double>({1.0, 1.0}))
55 ->set_hosts(std::vector<sg4::Host*>({hosts[0], hosts[1]}))
57 end_time = sg4::Engine::get_clock();
58 XBT_INFO("Actual result: computing 2 flops on 2 hosts at 1 flop/s takes %.2f seconds.", end_time - start_time);
61 sg4::this_actor::sleep_for(5);
63 XBT_INFO("TEST: Create and run a parallel execution on 2 heterogeneous hosts.");
64 XBT_INFO("------------------------------------------------------------");
65 XBT_INFO("Have to compute 2 flops across two hosts, one running at 1 flop/s and one at 2 flop/s.");
66 XBT_INFO("Should be done in exactly one second.");
67 start_time = sg4::Engine::get_clock();
68 sg4::Exec::init()->set_flops_amounts(std::vector<double>({1.0, 1.0}))
69 ->set_hosts(std::vector<sg4::Host*>({hosts[0], hosts[5]}))
71 end_time = sg4::Engine::get_clock();
72 XBT_INFO("Actual result: computing 2 flops on 2 heterogeneous hosts takes %.2f seconds.", end_time - start_time);
75 sg4::this_actor::sleep_for(5);
77 XBT_INFO("TEST: Latency test between hosts connected by a shared link.");
78 XBT_INFO("------------------------------------------------------------");
79 XBT_INFO("Have to send 1B from one host to another at 1Bps with a latency of 500ms.");
80 XBT_INFO("Should be done in 1.5 seconds (500ms latency + 1s transfert).");
81 start_time = sg4::Engine::get_clock();
82 sg4::Comm::sendto_async(hosts[0], hosts[4], 1.0)->wait();
83 end_time = sg4::Engine::get_clock();
84 XBT_INFO("Actual result: sending 1 byte on a shared link at 1Bps + 500ms takes %.2f seconds.", end_time - start_time);
87 sg4::this_actor::sleep_for(5);
89 XBT_INFO("TEST: Latency test between hosts connected by a fatpipe link.");
90 XBT_INFO("------------------------------------------------------------");
91 XBT_INFO("Have to send 1B from one host to another at 1Bps with a latency of 500ms.");
92 XBT_INFO("Should be done in 1.5 seconds (500ms latency + 1s transfert).");
93 start_time = sg4::Engine::get_clock();
94 sg4::Comm::sendto_async(hosts[0], hosts[5], 1.0)->wait();
95 end_time = sg4::Engine::get_clock();
96 XBT_INFO("Actual result: sending 1 byte on a fatpipe link at 1Bps + 500ms takes %.2f seconds.", end_time - start_time);
99 sg4::this_actor::sleep_for(5);
101 XBT_INFO("TEST: Latency test between hosts connected by a 3-link route.");
102 XBT_INFO("------------------------------------------------------------");
103 XBT_INFO("Have to send 1B from one host to another at 1Bps with a latency of 2 x 500ms + 1s.");
104 XBT_INFO("Should be done in 3 seconds (2 x 500ms + 1s latency + 1s transfert).");
105 start_time = sg4::Engine::get_clock();
106 sg4::Comm::sendto_async(hosts[0], hosts[1], 1.0)->wait();
107 end_time = sg4::Engine::get_clock();
108 XBT_INFO("Actual result: sending 1 byte on a 3-link route at 1Bps + 2,500ms takes %.2f seconds.", end_time - start_time);
111 sg4::this_actor::sleep_for(5);
113 XBT_INFO("TEST: Latency test between hosts connected by a link with large latency.");
114 XBT_INFO("------------------------------------------------------------");
115 XBT_INFO("Have to send 1B from one host to another on a link at 2Bps with a latency of 2 x 1024^2s.");
116 XBT_INFO("This latency is half the default TCP window size (4MiB). This limits the bandwidth to 1B");
117 XBT_INFO("Should be done in 2 x 1024^2s + 1 seconds (large latency + 1s transfert).");
118 start_time = sg4::Engine::get_clock();
119 sg4::Comm::sendto_async(hosts[0], hosts[6], 1.0)->wait();
120 end_time = sg4::Engine::get_clock();
121 XBT_INFO("Actual result: sending 1 byte on a large latency link takes %.2f seconds.", end_time - start_time);
124 sg4::this_actor::sleep_for(5);
126 XBT_INFO("TEST: Latency test between hosts connected by a shared link with 2 comms in same direction.");
127 XBT_INFO("------------------------------------------------------------");
128 XBT_INFO("Have to send 2 x 1B from one host to another at 1Bps with a latency of 500ms.");
129 XBT_INFO("Should be done in 2.5 seconds (500ms latency + 2s transfert).");
130 start_time = sg4::Engine::get_clock();
131 sg4::CommPtr c1 = sg4::Comm::sendto_async(hosts[0], hosts[4], 1.0);
132 sg4::CommPtr c2 = sg4::Comm::sendto_async(hosts[0], hosts[4], 1.0);
135 end_time = sg4::Engine::get_clock();
136 XBT_INFO("Actual result: sending 2x1 bytes on a shared link at 1Bps + 500ms takes %.2f seconds.", end_time - start_time);
139 sg4::this_actor::sleep_for(5);
141 XBT_INFO("TEST: Latency test between hosts connected by a fatpipe link with 2 comms in same direction.");
142 XBT_INFO("------------------------------------------------------------");
143 XBT_INFO("Have to send 2 x 1B from one host to another at 1Bps with a latency of 500ms.");
144 XBT_INFO("Should be done in 1.5 seconds (500ms latency + 1s transfert).");
145 start_time = sg4::Engine::get_clock();
146 c1 = sg4::Comm::sendto_async(hosts[0], hosts[5], 1.0);
147 c2 = sg4::Comm::sendto_async(hosts[0], hosts[5], 1.0);
150 end_time = sg4::Engine::get_clock();
151 XBT_INFO("Actual result: sending 2x1 bytes on a fatpipe link at 1Bps + 500ms takes %.2f seconds.", end_time - start_time);
154 sg4::this_actor::sleep_for(5);
156 XBT_INFO("TEST: Latency test between hosts connected by a 3-link route with 2 comms in same direction.");
157 XBT_INFO("------------------------------------------------------------");
158 XBT_INFO("Have to send 2 x 1B from one host to another at 1Bps with a latency of 2 x 500ms + 1s.");
159 XBT_INFO("Should be done in 4 seconds (2 x 500ms + 1s latency + 2s transfert).");
160 start_time = sg4::Engine::get_clock();
161 c1 = sg4::Comm::sendto_async(hosts[0], hosts[1], 1.0);
162 c2 = sg4::Comm::sendto_async(hosts[0], hosts[1], 1.0);
165 end_time = sg4::Engine::get_clock();
166 XBT_INFO("Actual result: sending 2x1 bytes on a 3-link route at 1Bps + 2,500ms takes %.2f seconds.",
167 end_time - start_time);
170 sg4::this_actor::sleep_for(5);
172 XBT_INFO("TEST: Latency test between hosts connected by a shared link with 2 comms in opposite direction.");
173 XBT_INFO("------------------------------------------------------------");
174 XBT_INFO("Have to send 1B between two hosts in each direction at 1Bps with a latency of 500ms.");
175 XBT_INFO("Should be done in 2.5 seconds (500ms latency + 2s transfert).");
176 start_time = sg4::Engine::get_clock();
177 c1 = sg4::Comm::sendto_async(hosts[0], hosts[4], 1.0);
178 c2 = sg4::Comm::sendto_async(hosts[4], hosts[0], 1.0);
181 end_time = sg4::Engine::get_clock();
182 XBT_INFO("Actual result: sending 1 byte in both directions on a shared link at 1Bps + 500ms takes %.2f seconds.",
183 end_time - start_time);
186 sg4::this_actor::sleep_for(5);
188 XBT_INFO("TEST: Latency test between hosts connected by a fatpipe link with 2 comms in opposite direction.");
189 XBT_INFO("------------------------------------------------------------");
190 XBT_INFO("Have to send 1B between two hosts in each direction at 1Bps with a latency of 500ms.");
191 XBT_INFO("Should be done in 1.5 seconds (500ms latency + 1s transfert).");
192 start_time = sg4::Engine::get_clock();
193 c1 = sg4::Comm::sendto_async(hosts[0], hosts[5], 1.0);
194 c2 = sg4::Comm::sendto_async(hosts[5], hosts[0], 1.0);
197 end_time = sg4::Engine::get_clock();
198 XBT_INFO("Actual result: sending 1 byte in both directions on a fatpipe link at 1Bps + 500ms takes %.2f seconds.",
199 end_time - start_time);
202 sg4::this_actor::sleep_for(5);
204 XBT_INFO("TEST: Latency test between hosts connected by a 3-link route with 2 comms in opposite direction.");
205 XBT_INFO("------------------------------------------------------------");
206 XBT_INFO("Have to send 1B between two hosts in each direction at 1Bps with a latency of 2 x 500ms + 1s.");
207 XBT_INFO("Should be done in 4 seconds (2 x 500ms + 1s latency + 2s transfert).");
208 start_time = sg4::Engine::get_clock();
209 c1 = sg4::Comm::sendto_async(hosts[0], hosts[1], 1.0);
210 c2 = sg4::Comm::sendto_async(hosts[1], hosts[0], 1.0);
213 end_time = sg4::Engine::get_clock();
214 XBT_INFO("Actual result: sending 1 byte in both directions on a 3-link route at 1Bps + 2,500ms takes %.2f seconds.",
215 end_time - start_time);
218 sg4::this_actor::sleep_for(5);
220 XBT_INFO("TEST: 4-host parallel communication with independent transfers.");
221 XBT_INFO("------------------------------------------------------------");
222 XBT_INFO("'cpu0' sends 1B to 'cpu1' and 'cpu2' sends 1B to 'cpu3'. The only shared link is the fatpipe switch.");
223 XBT_INFO("Should be done in 3 seconds (2 x 500ms + 1s latency + 1s transfert).");
224 start_time = sg4::Engine::get_clock();
225 sg4::Exec::init()->set_bytes_amounts(std::vector<double>({0.0, 1.0, 0.0, 0.0,
228 0.0, 0.0, 0.0, 0.0 }))
229 ->set_hosts(std::vector<sg4::Host*>({hosts[0], hosts[1], hosts[2], hosts[3]}))
231 end_time = sg4::Engine::get_clock();
232 XBT_INFO("Actual result: sending 2 x 1 byte in a parallel communication without interference takes %.2f seconds.",
233 end_time - start_time);
236 sg4::this_actor::sleep_for(5);
238 XBT_INFO("TEST: 4-host parallel communication with scatter pattern.");
239 XBT_INFO("------------------------------------------------------------");
240 XBT_INFO("'cpu0' sends 1B to 'cpu1', 2B to 'cpu2' and 3B to 'cpu3'.");
241 XBT_INFO("Should be done in 8 seconds: 2 x 500ms + 1s of initial latency and :");
242 XBT_INFO(" - For 3 seconds, three flows share a link to transfer 3 x 1B. 'cpu1' received its payload");
243 XBT_INFO(" - For 2 seconds, two lows share a link to transfer 1 x 1B. 'cpu2' received is payload");
244 XBT_INFO(" - For 1 second, one flow has the full bandwidth to transfer 1B. 'cpu3' received is payload");
246 start_time = sg4::Engine::get_clock();
247 sg4::Exec::init()->set_bytes_amounts(std::vector<double>({0.0, 1.0, 2.0, 3.0,
250 0.0, 0.0, 0.0, 0.0 }))
251 ->set_hosts(std::vector<sg4::Host*>({hosts[0], hosts[1], hosts[2], hosts[3]}))
253 end_time = sg4::Engine::get_clock();
254 XBT_INFO("Actual result: scattering an increasing number of bytes to 3 hosts takes %.2f seconds.",
255 end_time - start_time);
258 sg4::this_actor::sleep_for(5);
260 XBT_INFO("TEST: 4-host parallel communication with all-to-all pattern.");
261 XBT_INFO("------------------------------------------------------------");
262 XBT_INFO("Each host sends 1B to every other hosts.");
263 XBT_INFO("Should be done in 8 seconds: 2 x 500ms + 1s of initial latency and 6 seconds for transfer");
264 XBT_INFO("Each SHARED link is traversed by 6 flows (3 in and 3 out). ");
265 XBT_INFO("Each 1B transfer thus takes 6 seconds on a 1Bps link");
267 start_time = sg4::Engine::get_clock();
268 sg4::Exec::init()->set_bytes_amounts(std::vector<double>({0.0, 1.0, 1.0, 1.0,
271 1.0, 1.0, 1.0, 0.0 }))
272 ->set_hosts(std::vector<sg4::Host*>({hosts[0], hosts[1], hosts[2], hosts[3]}))
274 end_time = sg4::Engine::get_clock();
275 XBT_INFO("Actual result: 1-byte all-too-all in a parallel communication takes %.2f seconds.",
276 end_time - start_time);
279 sg4::this_actor::sleep_for(5);
281 XBT_INFO("TEST: Two concurrent communications, 1 large and 1 small.");
282 XBT_INFO("------------------------------------------------------------");
283 XBT_INFO("A host sends two messages of 100MB and 1B to the other host.");
284 XBT_INFO("Should be done in 0.8001 seconds: 1e8/1.25e8 for transfer + 1e-4 of latency");
285 XBT_INFO("The small communication has a negligible impact on the large one.");
286 XBT_INFO("This corresponds to paying latency once and having the full bandwidth for the large communication.");
288 start_time = sg4::Engine::get_clock();
289 c1 = sg4::Comm::sendto_async(hosts[0], hosts[7], 1e8);
290 c2 = sg4::Comm::sendto_async(hosts[0], hosts[7], 1.0);
293 end_time = sg4::Engine::get_clock();
294 XBT_INFO("Actual result: 1 small and 1 large concurrent communications take %.4f seconds.",
295 end_time - start_time);
299 int main(int argc, char** argv)
301 sg4::Engine engine(&argc, argv);
302 engine.load_platform(argv[1]);
303 sg4::Actor::create("dispatcher", sg4::Host::by_name("cpu0"), main_dispatcher);