service: fix lcore stop
[dpdk.git] / test / test / test_service_cores.c
1 /*-
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32
33 #include <rte_common.h>
34 #include <rte_hexdump.h>
35 #include <rte_mbuf.h>
36 #include <rte_malloc.h>
37 #include <rte_memcpy.h>
38 #include <rte_cycles.h>
39
40 #include <rte_service.h>
41 #include <rte_service_component.h>
42
43 #include "test.h"
44
45 /* used as the service core ID */
46 static uint32_t slcore_id;
47 /* used as timestamp to detect if a service core is running */
48 static uint64_t service_tick;
49 /* used as a flag to check if a function was run */
50 static uint32_t service_remote_launch_flag;
51
52 #define SERVICE_DELAY 1
53
54 #define DUMMY_SERVICE_NAME "dummy_service"
55 #define MT_SAFE_SERVICE_NAME "mt_safe_service"
56
57 static int
58 testsuite_setup(void)
59 {
60         slcore_id = rte_get_next_lcore(/* start core */ -1,
61                                        /* skip master */ 1,
62                                        /* wrap */ 0);
63
64         return TEST_SUCCESS;
65 }
66
67 static void
68 testsuite_teardown(void)
69 {
70         /* release service cores? */
71 }
72
73 static int32_t dummy_cb(void *args)
74 {
75         RTE_SET_USED(args);
76         service_tick++;
77         rte_delay_ms(SERVICE_DELAY);
78         return 0;
79 }
80
81 static int32_t dummy_mt_unsafe_cb(void *args)
82 {
83         /* before running test, the initialization has set pass_test to 1.
84          * If the cmpset in service-cores is working correctly, the code here
85          * should never fail to take the lock. If the lock *is* taken, fail the
86          * test, because two threads are concurrently in a non-MT safe callback.
87          */
88         uint32_t *test_params = args;
89         uint32_t *atomic_lock = &test_params[0];
90         uint32_t *pass_test = &test_params[1];
91         int lock_taken = rte_atomic32_cmpset(atomic_lock, 0, 1);
92         if (lock_taken) {
93                 /* delay with the lock held */
94                 rte_delay_ms(250);
95                 rte_atomic32_clear((rte_atomic32_t *)atomic_lock);
96         } else {
97                 /* 2nd thread will fail to take lock, so set pass flag */
98                 *pass_test = 0;
99         }
100
101         return 0;
102 }
103
104
105 static int32_t dummy_mt_safe_cb(void *args)
106 {
107         /* Atomic checks to ensure MT safe services allow > 1 thread to
108          * concurrently run the callback. The concept is as follows;
109          * 1) if lock is available, take the lock then delay
110          * 2) if first lock is taken, and a thread arrives in the CB, we know
111          *    that 2 threads are running the callback at the same time: MT safe
112          */
113         uint32_t *test_params = args;
114         uint32_t *atomic_lock = &test_params[0];
115         uint32_t *pass_test = &test_params[1];
116         int lock_taken = rte_atomic32_cmpset(atomic_lock, 0, 1);
117         if (lock_taken) {
118                 /* delay with the lock held */
119                 rte_delay_ms(250);
120                 rte_atomic32_clear((rte_atomic32_t *)atomic_lock);
121         } else {
122                 /* 2nd thread will fail to take lock, so set pass flag */
123                 *pass_test = 1;
124         }
125
126         return 0;
127 }
128
129 /* unregister all services */
130 static int
131 unregister_all(void)
132 {
133         uint32_t i;
134
135         TEST_ASSERT_EQUAL(-EINVAL, rte_service_component_unregister(1000),
136                         "Unregistered invalid service id");
137
138         uint32_t c = rte_service_get_count();
139         for (i = 0; i < c; i++) {
140                 TEST_ASSERT_EQUAL(0, rte_service_component_unregister(i),
141                                 "Error unregistering a valid service");
142         }
143
144         rte_service_lcore_reset_all();
145
146         return TEST_SUCCESS;
147 }
148
149 /* register a single dummy service */
150 static int
151 dummy_register(void)
152 {
153         /* make sure there are no remains from previous tests */
154         unregister_all();
155
156         struct rte_service_spec service;
157         memset(&service, 0, sizeof(struct rte_service_spec));
158
159         TEST_ASSERT_EQUAL(-EINVAL,
160                         rte_service_component_register(&service, NULL),
161                         "Invalid callback");
162         service.callback = dummy_cb;
163
164         TEST_ASSERT_EQUAL(-EINVAL,
165                         rte_service_component_register(&service, NULL),
166                         "Invalid name");
167         snprintf(service.name, sizeof(service.name), DUMMY_SERVICE_NAME);
168
169         uint32_t id;
170         TEST_ASSERT_EQUAL(0, rte_service_component_register(&service, &id),
171                         "Failed to register valid service");
172
173         rte_service_component_runstate_set(id, 1);
174
175         return TEST_SUCCESS;
176 }
177
178 /* verify get_by_name() service lookup */
179 static int
180 service_get_by_name(void)
181 {
182         unregister_all();
183
184         uint32_t sid;
185         TEST_ASSERT_EQUAL(-ENODEV,
186                         rte_service_get_by_name(DUMMY_SERVICE_NAME, &sid),
187                         "get by name with invalid name should return -ENODEV");
188         TEST_ASSERT_EQUAL(-EINVAL,
189                         rte_service_get_by_name(DUMMY_SERVICE_NAME, 0x0),
190                         "get by name with NULL ptr should return -ENODEV");
191
192         /* register service */
193         struct rte_service_spec service;
194         memset(&service, 0, sizeof(struct rte_service_spec));
195         TEST_ASSERT_EQUAL(-EINVAL,
196                         rte_service_component_register(&service, NULL),
197                         "Invalid callback");
198         service.callback = dummy_cb;
199         TEST_ASSERT_EQUAL(-EINVAL,
200                         rte_service_component_register(&service, NULL),
201                         "Invalid name");
202         snprintf(service.name, sizeof(service.name), DUMMY_SERVICE_NAME);
203         TEST_ASSERT_EQUAL(0, rte_service_component_register(&service, NULL),
204                         "Failed to register valid service");
205
206         /* we unregistered all service, now registering 1, should be id 0 */
207         uint32_t service_id_as_expected = 0;
208         TEST_ASSERT_EQUAL(0, rte_service_get_by_name(DUMMY_SERVICE_NAME, &sid),
209                         "Service get_by_name should return 0 on valid inputs");
210         TEST_ASSERT_EQUAL(service_id_as_expected, sid,
211                         "Service get_by_name should equal expected id");
212
213         unregister_all();
214
215         /* ensure after unregister, get_by_name returns NULL */
216         TEST_ASSERT_EQUAL(-ENODEV,
217                         rte_service_get_by_name(DUMMY_SERVICE_NAME, &sid),
218                         "get by name should return -ENODEV after unregister");
219
220         return TEST_SUCCESS;
221 }
222
223 /* verify probe of capabilities */
224 static int
225 service_probe_capability(void)
226 {
227         unregister_all();
228
229         struct rte_service_spec service;
230         memset(&service, 0, sizeof(struct rte_service_spec));
231         service.callback = dummy_cb;
232         snprintf(service.name, sizeof(service.name), DUMMY_SERVICE_NAME);
233         service.capabilities |= RTE_SERVICE_CAP_MT_SAFE;
234         TEST_ASSERT_EQUAL(0, rte_service_component_register(&service, NULL),
235                         "Register of MT SAFE service failed");
236
237         /* verify flag is enabled */
238         const uint32_t sid = 0;
239         int32_t mt = rte_service_probe_capability(sid, RTE_SERVICE_CAP_MT_SAFE);
240         TEST_ASSERT_EQUAL(1, mt, "MT SAFE capability flag not set.");
241
242
243         unregister_all();
244
245         memset(&service, 0, sizeof(struct rte_service_spec));
246         service.callback = dummy_cb;
247         snprintf(service.name, sizeof(service.name), DUMMY_SERVICE_NAME);
248         TEST_ASSERT_EQUAL(0, rte_service_component_register(&service, NULL),
249                         "Register of non-MT safe service failed");
250
251         /* verify flag is enabled */
252         mt = rte_service_probe_capability(sid, RTE_SERVICE_CAP_MT_SAFE);
253         TEST_ASSERT_EQUAL(0, mt, "MT SAFE cap flag set on non MT SAFE service");
254
255         return unregister_all();
256 }
257
258 /* verify the service name */
259 static int
260 service_name(void)
261 {
262         const char *name = rte_service_get_name(0);
263         int equal = strcmp(name, DUMMY_SERVICE_NAME);
264         TEST_ASSERT_EQUAL(0, equal, "Error: Service name not correct");
265
266         return unregister_all();
267 }
268
269 /* verify service dump */
270 static int
271 service_dump(void)
272 {
273         const uint32_t sid = 0;
274         rte_service_set_stats_enable(sid, 1);
275         rte_service_dump(stdout, 0);
276         rte_service_set_stats_enable(sid, 0);
277         rte_service_dump(stdout, 0);
278         return unregister_all();
279 }
280
281 /* start and stop a service */
282 static int
283 service_start_stop(void)
284 {
285         const uint32_t sid = 0;
286
287         /* runstate_get() returns if service is running and slcore is mapped */
288         TEST_ASSERT_EQUAL(0, rte_service_lcore_add(slcore_id),
289                         "Service core add did not return zero");
290         int ret = rte_service_map_lcore_set(sid, slcore_id, 1);
291         TEST_ASSERT_EQUAL(0, ret,
292                         "Enabling service core, expected 0 got %d", ret);
293
294         TEST_ASSERT_EQUAL(0, rte_service_runstate_get(sid),
295                         "Error: Service should be stopped");
296
297         TEST_ASSERT_EQUAL(0, rte_service_runstate_set(sid, 0),
298                         "Error: Service stopped returned non-zero");
299
300         TEST_ASSERT_EQUAL(0, rte_service_runstate_get(sid),
301                         "Error: Service is running - should be stopped");
302
303         TEST_ASSERT_EQUAL(0, rte_service_runstate_set(sid, 1),
304                         "Error: Service start returned non-zero");
305
306         TEST_ASSERT_EQUAL(1, rte_service_runstate_get(sid),
307                         "Error: Service is not running");
308
309         return unregister_all();
310 }
311
312
313 static int
314 service_remote_launch_func(void *arg)
315 {
316         RTE_SET_USED(arg);
317         service_remote_launch_flag = 1;
318         return 0;
319 }
320
321 /* enable and disable a lcore for a service */
322 static int
323 service_lcore_en_dis_able(void)
324 {
325         const uint32_t sid = 0;
326
327         /* expected failure cases */
328         TEST_ASSERT_EQUAL(-EINVAL, rte_service_map_lcore_set(sid, 100000, 1),
329                         "Enable on invalid core did not fail");
330         TEST_ASSERT_EQUAL(-EINVAL, rte_service_map_lcore_set(sid, 100000, 0),
331                         "Disable on invalid core did not fail");
332
333         /* add service core to allow enabling */
334         TEST_ASSERT_EQUAL(0, rte_service_lcore_add(slcore_id),
335                         "Add service core failed when not in use before");
336
337         /* valid enable */
338         TEST_ASSERT_EQUAL(0, rte_service_map_lcore_set(sid, slcore_id, 1),
339                         "Enabling valid service and core failed");
340         TEST_ASSERT_EQUAL(1, rte_service_map_lcore_get(sid, slcore_id),
341                         "Enabled core returned not-enabled");
342
343         /* valid disable */
344         TEST_ASSERT_EQUAL(0, rte_service_map_lcore_set(sid, slcore_id, 0),
345                         "Disabling valid service and lcore failed");
346         TEST_ASSERT_EQUAL(0, rte_service_map_lcore_get(sid, slcore_id),
347                         "Disabled core returned enabled");
348
349         /* call remote_launch to verify that app can launch ex-service lcore */
350         service_remote_launch_flag = 0;
351         int ret = rte_eal_remote_launch(service_remote_launch_func, NULL,
352                                         slcore_id);
353         TEST_ASSERT_EQUAL(0, ret, "Ex-service core remote launch failed.");
354         rte_eal_mp_wait_lcore();
355         TEST_ASSERT_EQUAL(1, service_remote_launch_flag,
356                         "Ex-service core function call had no effect.");
357
358         return unregister_all();
359 }
360
361 static int
362 service_lcore_running_check(void)
363 {
364         uint64_t tick = service_tick;
365         rte_delay_ms(SERVICE_DELAY * 10);
366         /* if (tick != service_tick) we know the lcore as polled the service */
367         return tick != service_tick;
368 }
369
370 static int
371 service_lcore_add_del(void)
372 {
373         /* check initial count */
374         TEST_ASSERT_EQUAL(0, rte_service_lcore_count(),
375                         "Service lcore count has value before adding a lcore");
376
377         /* check service lcore add */
378         TEST_ASSERT_EQUAL(0, rte_service_lcore_add(slcore_id),
379                         "Add service core failed when not in use before");
380         TEST_ASSERT_EQUAL(-EALREADY, rte_service_lcore_add(slcore_id),
381                         "Add service core failed to refuse in-use lcore");
382
383         /* check count */
384         TEST_ASSERT_EQUAL(1, rte_service_lcore_count(),
385                         "Service core count not equal to one");
386
387         /* retrieve core list, checking lcore ids */
388         const uint32_t size = 4;
389         uint32_t service_core_ids[size];
390         int32_t n = rte_service_lcore_list(service_core_ids, size);
391         TEST_ASSERT_EQUAL(1, n, "Service core list return should equal 1");
392         TEST_ASSERT_EQUAL(slcore_id, service_core_ids[0],
393                                 "Service core list lcore must equal slcore_id");
394
395         /* recheck count, add more cores, and check count */
396         TEST_ASSERT_EQUAL(1, rte_service_lcore_count(),
397                         "Service core count not equal to one");
398         uint32_t slcore_1 = rte_get_next_lcore(/* start core */ -1,
399                                                /* skip master */ 1,
400                                                /* wrap */ 0);
401         TEST_ASSERT_EQUAL(0, rte_service_lcore_add(slcore_1),
402                         "Service core add did not return zero");
403         uint32_t slcore_2 = rte_get_next_lcore(/* start core */ slcore_1,
404                                                /* skip master */ 1,
405                                                /* wrap */ 0);
406         TEST_ASSERT_EQUAL(0, rte_service_lcore_add(slcore_2),
407                         "Service core add did not return zero");
408
409         uint32_t count = rte_service_lcore_count();
410         const uint32_t cores_at_this_point = 3;
411         TEST_ASSERT_EQUAL(cores_at_this_point, count,
412                         "Service core count %d, expected %d", count,
413                         cores_at_this_point);
414
415         /* check longer service core list */
416         n = rte_service_lcore_list(service_core_ids, size);
417         TEST_ASSERT_EQUAL(3, n, "Service core list return should equal 3");
418         TEST_ASSERT_EQUAL(slcore_id, service_core_ids[0],
419                                 "Service core list[0] lcore must equal 1");
420         TEST_ASSERT_EQUAL(slcore_1, service_core_ids[1],
421                                 "Service core list[1] lcore must equal 2");
422         TEST_ASSERT_EQUAL(slcore_2, service_core_ids[2],
423                                 "Service core list[2] lcore must equal 3");
424
425         /* recheck count, remove lcores, check remaining lcore_id is correct */
426         TEST_ASSERT_EQUAL(3, rte_service_lcore_count(),
427                         "Service core count not equal to three");
428         TEST_ASSERT_EQUAL(0, rte_service_lcore_del(slcore_1),
429                         "Service core add did not return zero");
430         TEST_ASSERT_EQUAL(0, rte_service_lcore_del(slcore_2),
431                         "Service core add did not return zero");
432         TEST_ASSERT_EQUAL(1, rte_service_lcore_count(),
433                         "Service core count not equal to one");
434         n = rte_service_lcore_list(service_core_ids, size);
435         TEST_ASSERT_EQUAL(1, n, "Service core list return should equal one");
436         TEST_ASSERT_EQUAL(slcore_id, service_core_ids[0],
437                                 "Service core list[0] lcore must equal %d",
438                                 slcore_id);
439
440         return unregister_all();
441 }
442
443 static int
444 service_threaded_test(int mt_safe)
445 {
446         unregister_all();
447
448         /* add next 2 cores */
449         uint32_t slcore_1 = rte_get_next_lcore(/* start core */ -1,
450                                                /* skip master */ 1,
451                                                /* wrap */ 0);
452         TEST_ASSERT_EQUAL(0, rte_service_lcore_add(slcore_1),
453                         "mt safe lcore add fail");
454         uint32_t slcore_2 = rte_get_next_lcore(/* start core */ slcore_1,
455                                                /* skip master */ 1,
456                                                /* wrap */ 0);
457         TEST_ASSERT_EQUAL(0, rte_service_lcore_add(slcore_2),
458                         "mt safe lcore add fail");
459
460         /* Use atomic locks to verify that two threads are in the same function
461          * at the same time. These are passed to the unit tests through the
462          * callback userdata parameter
463          */
464         uint32_t test_params[2];
465         memset(test_params, 0, sizeof(uint32_t) * 2);
466
467         /* register MT safe service. */
468         struct rte_service_spec service;
469         memset(&service, 0, sizeof(struct rte_service_spec));
470         service.callback_userdata = test_params;
471         snprintf(service.name, sizeof(service.name), MT_SAFE_SERVICE_NAME);
472
473         if (mt_safe) {
474                 service.callback = dummy_mt_safe_cb;
475                 service.capabilities |= RTE_SERVICE_CAP_MT_SAFE;
476         } else
477                 service.callback = dummy_mt_unsafe_cb;
478
479         uint32_t id;
480         TEST_ASSERT_EQUAL(0, rte_service_component_register(&service, &id),
481                         "Register of MT SAFE service failed");
482
483         const uint32_t sid = 0;
484         TEST_ASSERT_EQUAL(0, rte_service_runstate_set(sid, 1),
485                         "Starting valid service failed");
486         TEST_ASSERT_EQUAL(0, rte_service_map_lcore_set(sid, slcore_1, 1),
487                         "Failed to enable lcore 1 on mt safe service");
488         TEST_ASSERT_EQUAL(0, rte_service_map_lcore_set(sid, slcore_2, 1),
489                         "Failed to enable lcore 2 on mt safe service");
490         rte_service_lcore_start(slcore_1);
491         rte_service_lcore_start(slcore_2);
492
493         /* wait for the worker threads to run */
494         rte_delay_ms(500);
495         rte_service_lcore_stop(slcore_1);
496         rte_service_lcore_stop(slcore_2);
497
498         TEST_ASSERT_EQUAL(0, test_params[1],
499                         "Service run with component runstate = 0");
500
501         /* enable backend runstate: the service should run after this */
502         rte_service_component_runstate_set(id, 1);
503
504         /* initialize to pass, see callback comment for details */
505         if (!mt_safe)
506                 test_params[1] = 1;
507
508         rte_service_lcore_start(slcore_1);
509         rte_service_lcore_start(slcore_2);
510
511         /* wait for the worker threads to run */
512         rte_delay_ms(500);
513         rte_service_lcore_stop(slcore_1);
514         rte_service_lcore_stop(slcore_2);
515
516         TEST_ASSERT_EQUAL(1, test_params[1],
517                         "MT Safe service not run by two cores concurrently");
518         TEST_ASSERT_EQUAL(0, rte_service_runstate_set(sid, 0),
519                         "Failed to stop MT Safe service");
520
521         unregister_all();
522
523         /* return the value of the callback pass_test variable to caller */
524         return test_params[1];
525 }
526
527 /* tests an MT SAFE service with two cores. The callback function ensures that
528  * two threads access the callback concurrently.
529  */
530 static int
531 service_mt_safe_poll(void)
532 {
533         int mt_safe = 1;
534         TEST_ASSERT_EQUAL(1, service_threaded_test(mt_safe),
535                         "Error: MT Safe service not run by two cores concurrently");
536         return TEST_SUCCESS;
537 }
538
539 /* tests a NON mt safe service with two cores, the callback is serialized
540  * using the atomic cmpset.
541  */
542 static int
543 service_mt_unsafe_poll(void)
544 {
545         int mt_safe = 0;
546         TEST_ASSERT_EQUAL(1, service_threaded_test(mt_safe),
547                         "Error: NON MT Safe service run by two cores concurrently");
548         return TEST_SUCCESS;
549 }
550
551 /* start and stop a service core - ensuring it goes back to sleep */
552 static int
553 service_lcore_start_stop(void)
554 {
555         /* start service core and service, create mapping so tick() runs */
556         const uint32_t sid = 0;
557         TEST_ASSERT_EQUAL(0, rte_service_runstate_set(sid, 1),
558                         "Starting valid service failed");
559         TEST_ASSERT_EQUAL(-EINVAL, rte_service_map_lcore_set(sid, slcore_id, 1),
560                         "Enabling valid service on non-service core must fail");
561
562         /* core start */
563         TEST_ASSERT_EQUAL(-EINVAL, rte_service_lcore_start(slcore_id),
564                         "Service core start without add should return EINVAL");
565         TEST_ASSERT_EQUAL(0, rte_service_lcore_add(slcore_id),
566                         "Service core add did not return zero");
567         TEST_ASSERT_EQUAL(0, rte_service_map_lcore_set(sid, slcore_id, 1),
568                         "Enabling valid service on valid core failed");
569         TEST_ASSERT_EQUAL(0, rte_service_lcore_start(slcore_id),
570                         "Service core start after add failed");
571         TEST_ASSERT_EQUAL(-EALREADY, rte_service_lcore_start(slcore_id),
572                         "Service core expected as running but was stopped");
573
574         /* ensures core really is running the service function */
575         TEST_ASSERT_EQUAL(1, service_lcore_running_check(),
576                         "Service core expected to poll service but it didn't");
577
578         /* core stop */
579         TEST_ASSERT_EQUAL(-EBUSY, rte_service_lcore_stop(slcore_id),
580                         "Service core running a service should return -EBUSY");
581         TEST_ASSERT_EQUAL(0, rte_service_runstate_set(sid, 0),
582                         "Stopping valid service failed");
583         TEST_ASSERT_EQUAL(-EINVAL, rte_service_lcore_stop(100000),
584                         "Invalid Service core stop should return -EINVAL");
585         TEST_ASSERT_EQUAL(0, rte_service_lcore_stop(slcore_id),
586                         "Service core stop expected to return 0");
587         TEST_ASSERT_EQUAL(-EALREADY, rte_service_lcore_stop(slcore_id),
588                         "Already stopped service core should return -EALREADY");
589
590         /* ensure service is not longer running */
591         TEST_ASSERT_EQUAL(0, service_lcore_running_check(),
592                         "Service core expected to poll service but it didn't");
593
594         TEST_ASSERT_EQUAL(0, rte_service_lcore_del(slcore_id),
595                         "Service core del did not return zero");
596
597         return unregister_all();
598 }
599
600 static struct unit_test_suite service_tests  = {
601         .suite_name = "service core test suite",
602         .setup = testsuite_setup,
603         .teardown = testsuite_teardown,
604         .unit_test_cases = {
605                 TEST_CASE_ST(dummy_register, NULL, unregister_all),
606                 TEST_CASE_ST(dummy_register, NULL, service_name),
607                 TEST_CASE_ST(dummy_register, NULL, service_get_by_name),
608                 TEST_CASE_ST(dummy_register, NULL, service_dump),
609                 TEST_CASE_ST(dummy_register, NULL, service_probe_capability),
610                 TEST_CASE_ST(dummy_register, NULL, service_start_stop),
611                 TEST_CASE_ST(dummy_register, NULL, service_lcore_add_del),
612                 TEST_CASE_ST(dummy_register, NULL, service_lcore_start_stop),
613                 TEST_CASE_ST(dummy_register, NULL, service_lcore_en_dis_able),
614                 TEST_CASE_ST(dummy_register, NULL, service_mt_unsafe_poll),
615                 TEST_CASE_ST(dummy_register, NULL, service_mt_safe_poll),
616                 TEST_CASES_END() /**< NULL terminate unit test array */
617         }
618 };
619
620 static int
621 test_service_common(void)
622 {
623         return unit_test_suite_runner(&service_tests);
624 }
625
626 REGISTER_TEST_COMMAND(service_autotest, test_service_common);