arm64/fp/fp-stress.c

60 static void child_start(struct child_data *child, const char *program)
70 	child->pid = fork();
71 	if (child->pid == -1)
75 	if (!child->pid) {
77 		 * In child, replace stdout with the pipe, errors to
124 		 * In parent, remember the child and close our copy of the
128 		child->stdout = pipefd[0];
129 		child->output = NULL;
130 		child->exited = false;
131 		child->output_seen = false;
134 		ev.data.ptr = child;
136 		ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, child->stdout, &ev);
139 					   child->name, strerror(errno), errno);
144 static bool child_output_read(struct child_data *child)
150 	ret = read(child->stdout, read_data, sizeof(read_data));
156 			       child->name, strerror(errno),
162 	child->output_seen = true;
165 	if (child->output) {
166 		strncpy(work, child->output, sizeof(work) - 1);
168 		free(child->output);
169 		child->output = NULL;
180 			ksft_print_msg("%s: %s\n", child->name, work);
189 		ret = asprintf(&child->output, "%s", work);
197 static void child_output(struct child_data *child, uint32_t events,
204 			read_more = child_output_read(child);
209 		close(child->stdout);
210 		child->stdout = -1;
214 	if (flush && child->output) {
215 		ksft_print_msg("%s: %s<EOF>\n", child->name, child->output);
216 		free(child->output);
217 		child->output = NULL;
221 static void child_tickle(struct child_data *child)
223 	if (child->output_seen && !child->exited)
224 		kill(child->pid, SIGUSR2);
227 static void child_stop(struct child_data *child)
229 	if (!child->exited)
230 		kill(child->pid, SIGTERM);
233 static void child_cleanup(struct child_data *child)
239 	if (!child->exited) {
241 			ret = waitpid(child->pid, &status, 0);
247 					       child->pid, strerror(errno),
253 		child->exit_status = WEXITSTATUS(status);
256 	if (!child->output_seen) {
257 		ksft_print_msg("%s no output seen\n", child->name);
261 	if (child->exit_status != 0) {
263 			       child->name, child->exit_status);
267 	ksft_test_result(!fail, "%s\n", child->name);
309 static void start_fpsimd(struct child_data *child, int cpu, int copy)
313 	ret = asprintf(&child->name, "FPSIMD-%d-%d", cpu, copy);
317 	child_start(child, "./fpsimd-test");
319 	ksft_print_msg("Started %s\n", child->name);
322 static void start_sve(struct child_data *child, int vl, int cpu)
330 	ret = asprintf(&child->name, "SVE-VL-%d-%d", vl, cpu);
334 	child_start(child, "./sve-test");
336 	ksft_print_msg("Started %s\n", child->name);
339 static void start_ssve(struct child_data *child, int vl, int cpu)
343 	ret = asprintf(&child->name, "SSVE-VL-%d-%d", vl, cpu);
351 	child_start(child, "./ssve-test");
353 	ksft_print_msg("Started %s\n", child->name);
356 static void start_za(struct child_data *child, int vl, int cpu)
364 	ret = asprintf(&child->name, "ZA-VL-%d-%d", vl, cpu);
368 	child_start(child, "./za-test");
370 	ksft_print_msg("Started %s\n", child->name);
373 static void start_zt(struct child_data *child, int cpu)
377 	ret = asprintf(&child->name, "ZT-%d", cpu);
381 	child_start(child, "./zt-test");
383 	ksft_print_msg("Started %s\n", child->name);
506 		ksft_exit_fail_msg("Unable to allocate child data\n");
600 		 * If the child processes have not produced output they