4 * Copyright IBM, Corp. 2011
9 * This work is licensed under the terms of the GNU LGPL, version 2 or later.
10 * See the COPYING.LIB file in the top-level directory.
14 #include "qemu/osdep.h"
16 #include "qemu/coroutine.h"
17 #include "qemu/coroutine_int.h"
20 * Check that qemu_in_coroutine() works
23 static void coroutine_fn verify_in_coroutine(void *opaque)
25 g_assert(qemu_in_coroutine());
28 static void test_in_coroutine(void)
32 g_assert(!qemu_in_coroutine());
34 coroutine = qemu_coroutine_create(verify_in_coroutine);
35 qemu_coroutine_enter(coroutine, NULL);
39 * Check that qemu_coroutine_self() works
42 static void coroutine_fn verify_self(void *opaque)
44 g_assert(qemu_coroutine_self() == opaque);
47 static void test_self(void)
51 coroutine = qemu_coroutine_create(verify_self);
52 qemu_coroutine_enter(coroutine, coroutine);
56 * Check that coroutines may nest multiple levels
60 unsigned int n_enter; /* num coroutines entered */
61 unsigned int n_return; /* num coroutines returned */
62 unsigned int max; /* maximum level of nesting */
65 static void coroutine_fn nest(void *opaque)
67 NestData *nd = opaque;
71 if (nd->n_enter < nd->max) {
74 child = qemu_coroutine_create(nest);
75 qemu_coroutine_enter(child, nd);
81 static void test_nesting(void)
90 root = qemu_coroutine_create(nest);
91 qemu_coroutine_enter(root, &nd);
93 /* Must enter and return from max nesting level */
94 g_assert_cmpint(nd.n_enter, ==, nd.max);
95 g_assert_cmpint(nd.n_return, ==, nd.max);
99 * Check that yield/enter transfer control correctly
102 static void coroutine_fn yield_5_times(void *opaque)
107 for (i = 0; i < 5; i++) {
108 qemu_coroutine_yield();
113 static void test_yield(void)
115 Coroutine *coroutine;
117 int i = -1; /* one extra time to return from coroutine */
119 coroutine = qemu_coroutine_create(yield_5_times);
121 qemu_coroutine_enter(coroutine, &done);
124 g_assert_cmpint(i, ==, 5); /* coroutine must yield 5 times */
127 static void coroutine_fn c2_fn(void *opaque)
129 qemu_coroutine_yield();
132 static void coroutine_fn c1_fn(void *opaque)
134 Coroutine *c2 = opaque;
135 qemu_coroutine_enter(c2, NULL);
138 static void test_co_queue(void)
143 c1 = qemu_coroutine_create(c1_fn);
144 c2 = qemu_coroutine_create(c2_fn);
146 qemu_coroutine_enter(c1, c2);
147 memset(c1, 0xff, sizeof(Coroutine));
148 qemu_coroutine_enter(c2, NULL);
152 * Check that creation, enter, and return work
155 static void coroutine_fn set_and_exit(void *opaque)
162 static void test_lifecycle(void)
164 Coroutine *coroutine;
167 /* Create, enter, and return from coroutine */
168 coroutine = qemu_coroutine_create(set_and_exit);
169 qemu_coroutine_enter(coroutine, &done);
170 g_assert(done); /* expect done to be true (first time) */
172 /* Repeat to check that no state affects this test */
174 coroutine = qemu_coroutine_create(set_and_exit);
175 qemu_coroutine_enter(coroutine, &done);
176 g_assert(done); /* expect done to be true (second time) */
180 #define RECORD_SIZE 10 /* Leave some room for expansion */
181 struct coroutine_position {
185 static struct coroutine_position records[RECORD_SIZE];
186 static unsigned record_pos;
188 static void record_push(int func, int state)
190 struct coroutine_position *cp = &records[record_pos++];
191 g_assert_cmpint(record_pos, <, RECORD_SIZE);
196 static void coroutine_fn co_order_test(void *opaque)
199 g_assert(qemu_in_coroutine());
200 qemu_coroutine_yield();
202 g_assert(qemu_in_coroutine());
205 static void do_order_test(void)
209 co = qemu_coroutine_create(co_order_test);
211 qemu_coroutine_enter(co, NULL);
213 g_assert(!qemu_in_coroutine());
214 qemu_coroutine_enter(co, NULL);
216 g_assert(!qemu_in_coroutine());
219 static void test_order(void)
222 const struct coroutine_position expected_pos[] = {
223 {1, 1,}, {2, 1}, {1, 2}, {2, 2}, {1, 3}
226 g_assert_cmpint(record_pos, ==, 5);
227 for (i = 0; i < record_pos; i++) {
228 g_assert_cmpint(records[i].func , ==, expected_pos[i].func );
229 g_assert_cmpint(records[i].state, ==, expected_pos[i].state);
233 * Lifecycle benchmark
236 static void coroutine_fn empty_coroutine(void *opaque)
241 static void perf_lifecycle(void)
243 Coroutine *coroutine;
249 g_test_timer_start();
250 for (i = 0; i < max; i++) {
251 coroutine = qemu_coroutine_create(empty_coroutine);
252 qemu_coroutine_enter(coroutine, NULL);
254 duration = g_test_timer_elapsed();
256 g_test_message("Lifecycle %u iterations: %f s\n", max, duration);
259 static void perf_nesting(void)
261 unsigned int i, maxcycles, maxnesting;
268 g_test_timer_start();
269 for (i = 0; i < maxcycles; i++) {
275 root = qemu_coroutine_create(nest);
276 qemu_coroutine_enter(root, &nd);
278 duration = g_test_timer_elapsed();
280 g_test_message("Nesting %u iterations of %u depth each: %f s\n",
281 maxcycles, maxnesting, duration);
288 static void coroutine_fn yield_loop(void *opaque)
290 unsigned int *counter = opaque;
292 while ((*counter) > 0) {
294 qemu_coroutine_yield();
298 static void perf_yield(void)
300 unsigned int i, maxcycles;
303 maxcycles = 100000000;
305 Coroutine *coroutine = qemu_coroutine_create(yield_loop);
307 g_test_timer_start();
309 qemu_coroutine_enter(coroutine, &i);
311 duration = g_test_timer_elapsed();
313 g_test_message("Yield %u iterations: %f s\n",
314 maxcycles, duration);
317 static __attribute__((noinline)) void dummy(unsigned *i)
322 static void perf_baseline(void)
324 unsigned int i, maxcycles;
327 maxcycles = 100000000;
330 g_test_timer_start();
334 duration = g_test_timer_elapsed();
336 g_test_message("Function call %u iterations: %f s\n",
337 maxcycles, duration);
340 static __attribute__((noinline)) void perf_cost_func(void *opaque)
342 qemu_coroutine_yield();
345 static void perf_cost(void)
347 const unsigned long maxcycles = 40000000;
353 g_test_timer_start();
354 while (i++ < maxcycles) {
355 co = qemu_coroutine_create(perf_cost_func);
356 qemu_coroutine_enter(co, &i);
357 qemu_coroutine_enter(co, NULL);
359 duration = g_test_timer_elapsed();
360 ops = (long)(maxcycles / (duration * 1000));
362 g_test_message("Run operation %lu iterations %f s, %luK operations/s, "
363 "%luns per coroutine",
366 (unsigned long)(1000000000.0 * duration / maxcycles));
369 int main(int argc, char **argv)
371 g_test_init(&argc, &argv, NULL);
372 g_test_add_func("/basic/co_queue", test_co_queue);
373 g_test_add_func("/basic/lifecycle", test_lifecycle);
374 g_test_add_func("/basic/yield", test_yield);
375 g_test_add_func("/basic/nesting", test_nesting);
376 g_test_add_func("/basic/self", test_self);
377 g_test_add_func("/basic/in_coroutine", test_in_coroutine);
378 g_test_add_func("/basic/order", test_order);
380 g_test_add_func("/perf/lifecycle", perf_lifecycle);
381 g_test_add_func("/perf/nesting", perf_nesting);
382 g_test_add_func("/perf/yield", perf_yield);
383 g_test_add_func("/perf/function-call", perf_baseline);
384 g_test_add_func("/perf/cost", perf_cost);