tools/power/cpupower/bench/main.c

File Facts

System

Linux kernel

Corpus path

tools/power/cpupower/bench/main.c

Extension

.c

Size

4738 bytes

Lines

190

Domain

Support Tooling And Documentation

Bucket

tools

Inferred role

Support Tooling And Documentation: implementation source

Status

source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

• Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• stdio.h
• stdlib.h
• string.h
• unistd.h
• getopt.h
• errno.h
• config.h
• system.h
• benchmark.h

Detected Declarations

• function usage
• function main

Annotated Snippet

switch (c) {
		case 'o':
			if (config->output != NULL)
				fclose(config->output);

			config->output = prepare_output(optarg);

			if (config->output == NULL)
				return EXIT_FAILURE;

			dprintf("user output path -> %s\n", optarg);
			break;
		case 's':
			sscanf(optarg, "%li", &config->sleep);
			dprintf("user sleep time -> %s\n", optarg);
			break;
		case 'l':
			sscanf(optarg, "%li", &config->load);
			dprintf("user load time -> %s\n", optarg);
			break;
		case 'c':
			sscanf(optarg, "%u", &config->cpu);
			dprintf("user cpu -> %s\n", optarg);
			break;
		case 'g':
			strncpy(config->governor, optarg, 14);
			dprintf("user governor -> %s\n", optarg);
			break;
		case 'p':
			if (string_to_prio(optarg) != SCHED_ERR) {
				config->prio = string_to_prio(optarg);
				dprintf("user prio -> %s\n", optarg);
			} else {
				if (config != NULL) {
					if (config->output != NULL)
						fclose(config->output);
					free(config);
				}
				usage();
			}
			break;
		case 'n':
			sscanf(optarg, "%u", &config->cycles);
			dprintf("user cycles -> %s\n", optarg);
			break;
		case 'r':
			sscanf(optarg, "%u", &config->rounds);
			dprintf("user rounds -> %s\n", optarg);
			break;
		case 'x':
			sscanf(optarg, "%li", &config->load_step);
			dprintf("user load_step -> %s\n", optarg);
			break;
		case 'y':
			sscanf(optarg, "%li", &config->sleep_step);
			dprintf("user sleep_step -> %s\n", optarg);
			break;
		case 'f':
			if (prepare_config(optarg, config))
				return EXIT_FAILURE;
			break;
		case 'v':
			config->verbose = 1;
			dprintf("verbose output enabled\n");
			break;
		case 'h':
		case '?':
		default:
			if (config != NULL) {
				if (config->output != NULL)
					fclose(config->output);
				free(config);
			}
			usage();
		}
	}

	if (config->verbose) {
		printf("starting benchmark with parameters:\n");
		printf("config:\n\t"
		       "sleep=%li\n\t"
		       "load=%li\n\t"
		       "sleep_step=%li\n\t"
		       "load_step=%li\n\t"
		       "cpu=%u\n\t"
		       "cycles=%u\n\t"
		       "rounds=%u\n\t"
		       "governor=%s\n\n",
		       config->sleep,
		       config->load,

Annotation

• Immediate include surface: `stdio.h`, `stdlib.h`, `string.h`, `unistd.h`, `getopt.h`, `errno.h`, `config.h`, `system.h`.
• Detected declarations: `function usage`, `function main`.
• Atlas domain: Support Tooling And Documentation / tools.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.