1 // SPDX-License-Identifier: GPL-2.0
17 #include <subcmd/parse-options.h>
25 #include "util/build-id.h"
27 #include "util/synthetic-events.h"
34 static unsigned int nr_samples = 100;  /* samples per mmap */
59 		     "Number of iterations used to compute average (default: 100)"),
60 	OPT_UINTEGER('m', "nr-mmaps", &nr_mmaps,
62 	OPT_UINTEGER('n', "nr-samples", &nr_samples,
70 	"perf bench internals inject-build-id <options>",
76  * if it contains a build-id.  Stops after collecting 4 times more than
91 	dso->name = realpath(fpath, NULL);  in add_dso()
92 	if (dso->name == NULL)  in add_dso()
93 		return -1;  in add_dso()
95 	dso->ino = nr_dsos++;  in add_dso()
126 		zfree(&dso->name);  in release_dso()
134 	return 0x400000ULL + dso->ino * 8192ULL;  in dso_map_addr()
152 	return writen(data->input_pipe[1], &event, event.header.size);  in synthesize_attr()
167 	event.fork.pid = data->pid;  in synthesize_fork()
168 	event.fork.tid = data->pid;  in synthesize_fork()
170 	return writen(data->input_pipe[1], &event, event.header.size);  in synthesize_fork()
180 	len += roundup(strlen(dso->name) + 1, 8) + bench_id_hdr_size;  in synthesize_mmap()
188 	event.mmap2.pid = data->pid;  in synthesize_mmap()
189 	event.mmap2.tid = data->pid;  in synthesize_mmap()
191 	event.mmap2.ino = dso->ino;  in synthesize_mmap()
193 	strcpy(event.mmap2.filename, dso->name);  in synthesize_mmap()
201 		if (writen(data->input_pipe[1], &event, len - bench_id_hdr_size) < 0)  in synthesize_mmap()
202 			return -1;  in synthesize_mmap()
203 		/* zero-fill sample id header */  in synthesize_mmap()
206 		ts_idx = (bench_id_hdr_size / sizeof(u64)) - 2;  in synthesize_mmap()
208 		if (writen(data->input_pipe[1], id_hdr_ptr, bench_id_hdr_size) < 0)  in synthesize_mmap()
209 			return -1;  in synthesize_mmap()
214 	ts_idx = (len / sizeof(u64)) - 2;  in synthesize_mmap()
216 	return writen(data->input_pipe[1], &event, len);  in synthesize_mmap()
223 		.tid = data->pid,  in synthesize_sample()
224 		.pid = data->pid,  in synthesize_sample()
235 	return writen(data->input_pipe[1], &event, event.header.size);  in synthesize_sample()
245 	return writen(data->input_pipe[1], &header, header.size);  in synthesize_flush()
255 	flag = fcntl(data->output_pipe[0], F_GETFL);  in data_reader()
256 	fcntl(data->output_pipe[0], F_SETFL, flag | O_NONBLOCK);  in data_reader()
260 		n = read(data->output_pipe[0], buf, sizeof(buf));  in data_reader()
272 	close(data->output_pipe[0]);  in data_reader()
283 		return -1;  in setup_injection()
285 	if (pipe(data->input_pipe) < 0)  in setup_injection()
286 		return -1;  in setup_injection()
288 	if (pipe(data->output_pipe) < 0)  in setup_injection()
289 		return -1;  in setup_injection()
291 	data->pid = fork();  in setup_injection()
292 	if (data->pid < 0)  in setup_injection()
293 		return -1;  in setup_injection()
295 	if (data->pid == 0) {  in setup_injection()
299 		close(data->input_pipe[1]);  in setup_injection()
300 		close(data->output_pipe[0]);  in setup_injection()
303 		dup2(data->input_pipe[0], STDIN_FILENO);  in setup_injection()
304 		close(data->input_pipe[0]);  in setup_injection()
305 		dup2(data->output_pipe[1], STDOUT_FILENO);  in setup_injection()
306 		close(data->output_pipe[1]);  in setup_injection()
323 		inject_argv[2] = strdup("-b");  in setup_injection()
325 			inject_argv[3] = strdup("--buildid-all");  in setup_injection()
335 	pthread_create(&data->th, NULL, data_reader, data);  in setup_injection()
338 	close(data->input_pipe[0]);  in setup_injection()
339 	close(data->output_pipe[1]);  in setup_injection()
343 		return -1;  in setup_injection()
356 	if (perf_header__write_pipe(data->input_pipe[1]) < 0)  in inject_build_id()
357 		return -1;  in inject_build_id()
360 		return -1;  in inject_build_id()
363 		return -1;  in inject_build_id()
370 		pr_debug2("   [%d] injecting: %s\n", i+1, dso->name);  in inject_build_id()
372 			return -1;  in inject_build_id()
376 				return -1;  in inject_build_id()
381 				return -1;  in inject_build_id()
386 	close(data->input_pipe[1]);  in inject_build_id()
388 	wait4(data->pid, &status, 0, &rusage);  in inject_build_id()
391 	pr_debug("   Child %d exited with %d\n", data->pid, status);  in inject_build_id()
406 	pr_debug("  Build-id%s injection benchmark\n", build_id_all ? "-all" : "");  in do_inject_loop()
415 			printf("  Build-id injection setup failed\n");  in do_inject_loop()
421 			printf("  Build-id injection failed\n");  in do_inject_loop()
431 		pthread_join(data->th, NULL);  in do_inject_loop()
436 	printf("  Average build-id%s injection took: %.3f msec (+- %.3f msec)\n",  in do_inject_loop()
437 	       build_id_all ? "-all" : "", time_average, time_stddev);  in do_inject_loop()
442 	printf("  Average time per event: %.3f usec (+- %.3f usec)\n",  in do_inject_loop()
447 	printf("  Average memory usage: %.0f KB (+- %.0f KB)\n",  in do_inject_loop()
464 		return -1;  in do_inject_loops()