3 /* This message is exactly 1024 bytes */
4 const char* const message =
5 "The point of this little file is to stress test a Citadel server.\n"
6 "It spawns n threads, where n is a command line parameter, each of\n"
7 "which writes 1000 messages total to the server.\n"
9 "-n is a command line parameter indicating how many users to simulate\n"
10 "(default 100). WARNING: Your system must be capable of creating this\n"
13 "-w is a command line parameter indicating how long to wait in seconds\n"
14 "between posting each message (default 10). The actual interval\n"
15 "will be randomized between w / 3 and w * 3.\n"
17 "A run is expected to take approximately three hours, given default\n"
18 "values, and assuming the server can keep up. If the run takes much\n"
19 "longer than this, there may be a performance problem with the server.\n"
20 "For best results, the test should be run from a different machine than\n"
21 "the server, but connected via a fast network link (e.g. 100Base-T).\n"
23 "To get baseline results, run the test with -n 1 (simulating 1 user)\n"
24 "on a machine with no other users logged in.\n"
27 "stress -n 500 -w 25 myserver > stress.csv\n";
29 /* The program tries to be as small and as fast as possible. Wherever
30 * possible, we avoid allocating memory on the heap. We do not pass data
31 * between threads. We do only a minimal amount of calculation. In
32 * particular, we only output raw timing data for the run; we do not
33 * collate it, average it, or do anything else with it. See below.
34 * The program does, however, use the same CtdlIPC functions as the
35 * standard Citadel text client, and incurs the same overhead as that
36 * program, using those functions.
38 * The program first creates a new user with a randomized username which
39 * begins with "testuser". It then creates 100 rooms named test0 through
40 * test99. If they already exist, this condition is ignored.
42 * The program then creates n threads, all of which wait on a conditional
43 * before they do anything. Once all of the threads have been created,
44 * they are signaled, and begin execution. Each thread logs in to the
45 * Citadel server separately, simulating a user login, then takes a
46 * timestamp from the operating system.
48 * Each thread selects a room from 0-99 randomly, then writes a small
49 * (1KB) test message to that room. 1K was chosen because it seems to
50 * represent an average message size for messages we expect to see.
51 * After writing the message, the thread sleeps for w seconds (sleep(w);)
52 * and repeats the process, until it has written 1,000 messages. The
53 * program provides a status display to standard error, unless w <= 2, in
54 * which case status display is disabled.
56 * After posting all messages, each thread takes a second timestamp, and
57 * subtracts the first timestamp. The resulting value (in seconds) is
58 * sent to standard output. The thread then exits.
60 * Once all threads have exited, the program exits.
65 #include <sys/types.h>
68 #if TIME_WITH_SYS_TIME
69 # include <sys/time.h>
73 # include <sys/time.h>
78 #include "citadel_ipc.h"
80 #ifndef HAVE_PTHREAD_H
81 #error This program requires threads
84 static int w = 10; /* see above */
85 static int n = 100; /* see above */
86 static int m = 1000; /* Number of messages to send; see above */
87 static volatile int count = 0; /* Total count of messages posted */
88 static volatile int total = 0; /* Total messages to be posted */
89 static pthread_mutex_t count_mutex = PTHREAD_MUTEX_INITIALIZER;
90 static pthread_mutex_t arg_mutex = PTHREAD_MUTEX_INITIALIZER;
92 static char username[12];
93 static char password[12];
95 static char* hostname = NULL;
96 static char* portname = NULL;
99 * Mutex for the random number generator
100 * We don't assume that rand_r() is present, so we have to
101 * provide our own locking for rand()
103 static pthread_mutex_t rand_mutex = PTHREAD_MUTEX_INITIALIZER;
106 * Conditional. All the threads wait for this signal to actually
107 * start bombarding the server.
109 static pthread_mutex_t start_mutex = PTHREAD_MUTEX_INITIALIZER;
110 static pthread_cond_t start_cond = PTHREAD_COND_INITIALIZER;
113 * connection died; hang it up
116 void connection_died(CtdlIPC* ipc, int using_ssl)
125 * This is the worker thread. It logs in and creates the 1,000 messages
126 * as described above.
128 void* worker(void* data)
130 CtdlIPC* ipc; /* My connection to the server */
131 void** args; /* Args sent in */
132 int r; /* IPC return code */
133 char aaa[SIZ]; /* Generic buffer */
134 int c; /* Message count */
135 time_t start, end; /* Timestamps */
136 struct ctdlipcmessage msg; /* The message we will post */
141 argc_ = (int*)args[0];
142 argv_ = (char***)args[1];
143 fprintf(stderr, "Set argc to %x\n", argc_);
144 fprintf(stderr, "Set argv to %x\n", argv_);
146 /* Setup the message we will be posting */
147 msg.text = (char*)message;
150 strcpy(msg.recipient, "");
151 strcpy(msg.subject, "Test message; ignore");
152 strcpy(msg.author, username);
154 fprintf(stderr, "Trying to connect to Citadel\n");
155 pthread_mutex_lock(&arg_mutex);
156 ipc = CtdlIPC_new(*argc_, *argv_, "", "");
157 pthread_mutex_unlock(&arg_mutex);
159 return NULL; /* oops, something happened... */
161 fprintf(stderr, "Trying to login to Citadel\n");
162 CtdlIPC_chat_recv(ipc, aaa);
164 fprintf(stderr, "Citadel refused me: %s\n", &aaa[4]);
165 return NULL; /* server ran out of connections maybe? */
168 CtdlIPCIdentifySoftware(ipc, 8, 8, REV_LEVEL, "Citadel stress tester",
169 "localhost", aaa); /* we're lying, the server knows */
171 r = CtdlIPCQueryUsername(ipc, username, aaa);
173 /* testuser already exists (from previous run?) */
174 r = CtdlIPCTryLogin(ipc, username, aaa);
176 fprintf(stderr, "Citadel refused username: %s\n", aaa);
177 CtdlIPC_delete_ptr(&ipc);
178 return NULL; /* Gawd only knows what went wrong */
180 r = CtdlIPCTryPassword(ipc, password, aaa);
182 fprintf(stderr, "Citadel refused password: %s\n", aaa);
183 CtdlIPC_delete_ptr(&ipc);
184 return NULL; /* Gawd only knows what went wrong */
187 /* testuser doesn't yet exist */
188 r = CtdlIPCCreateUser(ipc, username, 1, aaa);
190 fprintf(stderr, "Citadel refused create user: %s\n", aaa);
191 CtdlIPC_delete_ptr(&ipc);
192 return NULL; /* Gawd only knows what went wrong */
194 r = CtdlIPCChangePassword(ipc, password, aaa);
196 fprintf(stderr, "Citadel refused change password: %s\n", aaa);
197 CtdlIPC_delete_ptr(&ipc);
198 return NULL; /* Gawd only knows what went wrong */
202 /* Wait for the rest of the threads */
203 pthread_cond_wait(&start_cond, &start_mutex);
205 /* And now the fun begins! Send out a whole shitload of messages */
207 for (c = 0; c < m; c++) {
210 struct ctdlipcroom *rret;
212 /* Select the room to goto */
213 pthread_mutex_lock(&rand_mutex);
214 /* See Numerical Recipes in C or Knuth vol. 2 ch. 3 */
215 rm = (int)(99.0*rand()/(RAND_MAX+1.0));
216 pthread_mutex_unlock(&rand_mutex);
218 /* Goto the selected room */
219 sprintf(room, "test%d", rm);
220 r = CtdlIPCGotoRoom(ipc, room, "", &rret, aaa);
222 fprintf(stderr, "Citadel refused room change: %s\n", aaa);
223 CtdlIPC_delete_ptr(&ipc);
227 /* Post the message */
228 r = CtdlIPCPostMessage(ipc, 1, &msg, aaa);
230 fprintf(stderr, "Citadel refused message entry: %s\n", aaa);
231 CtdlIPC_delete_ptr(&ipc);
236 /* Do a status update */
237 pthread_mutex_lock(&count_mutex);
239 pthread_mutex_unlock(&count_mutex);
241 fprintf(stderr, "%d of %d - %d%% \r",
243 (int)(100 * count / total));
245 /* Wait for a while */
249 printf("%ld\n", end - start);
250 return (void*)(end - start);
255 * Shift argument list
257 int shift(int argc, char **argv, int start, int count)
261 for (i = start; i < argc - count; ++i)
262 argv[i] = argv[i + count];
268 * Main loop. Start a shitload of threads, all of which will attempt to
269 * kick a Citadel server square in the nuts.
271 int main(int argc, char** argv)
273 void* data[2]; /* pass args to worker thread */
274 pthread_t** threads; /* A shitload of threads */
275 pthread_attr_t attr; /* Thread attributes (we use defaults) */
276 int i; /* Counters */
277 long runtime; /* Run time for each thread */
279 setvbuf(stderr, NULL, _IONBF, 0);
281 /* Read argument list */
282 for (i = 0; i < argc; i++) {
283 if (!strcmp(argv[i], "-n")) {
284 n = atoi(argv[i + 1]);
285 argc = shift(argc, argv, i, 2);
287 if (!strcmp(argv[i], "-w")) {
288 w = atoi(argv[i + 1]);
289 argc = shift(argc, argv, i, 2);
291 if (!strcmp(argv[i], "-m")) {
292 m = atoi(argv[i + 1]);
293 argc = shift(argc, argv, i, 2);
295 if (!strcmp(argv[i], "-h") || !strcmp(argv[i], "--help")) {
296 fprintf(stderr, "Read stress.c for usage info\n");
301 data[0] = (void*)argc; /* pass args to worker thread */
302 data[1] = (void*)argv; /* pass args to worker thread */
303 fprintf(stderr, "Set data[0] to %x\n", data[0]);
304 fprintf(stderr, "Set data[1] to %x\n", data[1]);
305 fprintf(stderr, "Data is at %x\n", data);
307 /* This is how many total messages will be posted */
310 /* Pick a randomized username */
311 pthread_mutex_lock(&rand_mutex);
312 /* See Numerical Recipes in C or Knuth vol. 2 ch. 3 */
313 i = (int)(99.0*rand()/(RAND_MAX+1.0));
314 pthread_mutex_unlock(&rand_mutex);
315 sprintf(username, "testuser%d", i);
316 strcpy(password, username);
318 fprintf(stderr, "Allocating threads\n");
319 /* First, memory for our shitload of threads */
320 threads = calloc(n, sizeof(pthread_t*));
322 perror("Not enough memory");
326 /* Then thread attributes (all defaults for now) */
327 pthread_attr_init(&attr);
328 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
330 /* Then, create some threads */
331 for (i = 0; i < n; ++i) {
332 fprintf(stderr, "\rCreating thread %d", i);
333 pthread_create(threads[i], &attr, worker, (void*)data);
336 fprintf(stderr, "Starting in 10 seconds\r");
338 fprintf(stderr, " \r");
340 /* Then, signal the conditional they all are waiting on */
341 pthread_mutex_lock(&start_mutex);
342 pthread_cond_broadcast(&start_cond);
343 pthread_mutex_unlock(&start_mutex);
345 /* Then wait for them to exit */
346 for (i = 0; i < n; i++) {
347 pthread_join(*(threads[i]), (void*)&runtime);
348 /* We're ignoring this value for now... TODO */
350 fprintf(stderr, "\r \r");