diff options
Diffstat (limited to 'tools/power/cpupower/utils/idle_monitor/cpupower-monitor.c')
| -rw-r--r-- | tools/power/cpupower/utils/idle_monitor/cpupower-monitor.c | 446 |
1 files changed, 446 insertions, 0 deletions
diff --git a/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.c b/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.c new file mode 100644 index 000000000000..3e96e79de3c2 --- /dev/null +++ b/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.c @@ -0,0 +1,446 @@ +/* + * (C) 2010,2011 Thomas Renninger <trenn@suse.de>, Novell Inc. + * + * Licensed under the terms of the GNU GPL License version 2. + * + * Output format inspired by Len Brown's <lenb@kernel.org> turbostat tool. + * + */ + + +#include <stdio.h> +#include <unistd.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include <signal.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <libgen.h> + +#include "idle_monitor/cpupower-monitor.h" +#include "idle_monitor/idle_monitors.h" +#include "helpers/helpers.h" + +/* Define pointers to all monitors. */ +#define DEF(x) & x ## _monitor , +struct cpuidle_monitor * all_monitors[] = { +#include "idle_monitors.def" +0 +}; + +static struct cpuidle_monitor *monitors[MONITORS_MAX]; +static unsigned int avail_monitors; + +static char *progname; + +enum operation_mode_e { list = 1, show, show_all }; +static int mode; +static int interval = 1; +static char *show_monitors_param; +static struct cpupower_topology cpu_top; + +/* ToDo: Document this in the manpage */ +static char range_abbr[RANGE_MAX] = { 'T', 'C', 'P', 'M', }; + +long long timespec_diff_us(struct timespec start, struct timespec end) +{ + struct timespec temp; + if ((end.tv_nsec - start.tv_nsec) < 0) { + temp.tv_sec = end.tv_sec - start.tv_sec - 1; + temp.tv_nsec = 1000000000 + end.tv_nsec - start.tv_nsec; + } else { + temp.tv_sec = end.tv_sec - start.tv_sec; + temp.tv_nsec = end.tv_nsec - start.tv_nsec; + } + return (temp.tv_sec * 1000000) + (temp.tv_nsec / 1000); +} + +void monitor_help(void) +{ + printf(_("cpupower monitor: [-m <mon1>,[<mon2>],.. ] command\n")); + printf(_("cpupower monitor: [-m <mon1>,[<mon2>],.. ] [ -i interval_sec ]\n")); + printf(_("cpupower monitor: -l\n")); + printf(_("\t command: pass an arbitrary command to measure specific workload\n")); + printf(_("\t -i: time intervall to measure for in seconds (default 1)\n")); + printf(_("\t -l: list available CPU sleep monitors (for use with -m)\n")); + printf(_("\t -m: show specific CPU sleep monitors only (in same order)\n")); + printf(_("\t -h: print this help\n")); + printf("\n"); + printf(_("only one of: -l, -m are allowed\nIf none of them is passed,")); + printf(_(" all supported monitors are shown\n")); +} + +void print_n_spaces(int n) +{ + int x; + for (x = 0; x < n; x++) + printf(" "); +} + +/* size of s must be at least n + 1 */ +int fill_string_with_spaces(char *s, int n) +{ + int len = strlen(s); + if (len > n) + return -1; + for (; len < n; len++) + s[len] = ' '; + s[len] = '\0'; + return 0; +} + +void print_header(int topology_depth) +{ + int unsigned mon; + int state, need_len, pr_mon_len; + cstate_t s; + char buf[128] = ""; + int percent_width = 4; + + fill_string_with_spaces(buf, topology_depth * 5 - 1); + printf("%s|", buf); + + for (mon = 0; mon < avail_monitors; mon++) { + pr_mon_len = 0; + need_len = monitors[mon]->hw_states_num * (percent_width + 3) + - 1; + if (mon != 0) { + printf("|| "); + need_len --; + } + sprintf(buf, "%s", monitors[mon]->name); + fill_string_with_spaces(buf, need_len); + printf("%s", buf); + } + printf("\n"); + + if (topology_depth > 2) + printf("PKG |"); + if (topology_depth > 1) + printf("CORE|"); + if (topology_depth > 0) + printf("CPU |"); + + for (mon = 0; mon < avail_monitors; mon++) { + if (mon != 0) + printf("|| "); + else + printf(" "); + for (state = 0; state < monitors[mon]->hw_states_num; state++) { + if (state != 0) + printf(" | "); + s = monitors[mon]->hw_states[state]; + sprintf(buf, "%s", s.name); + fill_string_with_spaces(buf, percent_width); + printf("%s", buf); + } + printf(" "); + } + printf("\n"); +} + + +void print_results(int topology_depth, int cpu) +{ + unsigned int mon; + int state, ret; + double percent; + unsigned long long result; + cstate_t s; + + if (topology_depth > 2) + printf("%4d|", cpu_top.core_info[cpu].pkg); + if (topology_depth > 1) + printf("%4d|", cpu_top.core_info[cpu].core); + if (topology_depth > 0) + printf("%4d|", cpu_top.core_info[cpu].cpu); + + for (mon = 0; mon < avail_monitors; mon++) { + if (mon != 0) + printf("||"); + + for (state = 0; state < monitors[mon]->hw_states_num; state++) { + if (state != 0) + printf("|"); + + s = monitors[mon]->hw_states[state]; + + if (s.get_count_percent) { + ret = s.get_count_percent(s.id, &percent, + cpu_top.core_info[cpu].cpu); + if (ret) { + printf("******"); + } else if (percent >= 100.0) + printf("%6.1f", percent); + else + printf("%6.2f", percent); + } + else if (s.get_count) { + ret = s.get_count(s.id, &result, + cpu_top.core_info[cpu].cpu); + if (ret) { + printf("******"); + } else + printf("%6llu", result); + } + else { + printf(_("Monitor %s, Counter %s has no count " + "function. Implementation error\n"), + monitors[mon]->name, s.name); + exit (EXIT_FAILURE); + } + } + } + /* cpu offline */ + if (cpu_top.core_info[cpu].pkg == -1 || + cpu_top.core_info[cpu].core == -1) { + printf(_(" *is offline\n")); + return; + } else + printf("\n"); +} + + +/* param: string passed by -m param (The list of monitors to show) + * + * Monitors must have been registered already, matching monitors + * are picked out and available monitors array is overridden + * with matching ones + * + * Monitors get sorted in the same order the user passes them +*/ + +static void parse_monitor_param(char* param) +{ + unsigned int num; + int mon, hits = 0; + char *tmp = param, *token; + struct cpuidle_monitor *tmp_mons[MONITORS_MAX]; + + + for (mon = 0; mon < MONITORS_MAX;mon++, tmp = NULL) { + token = strtok(tmp, ","); + if (token == NULL) + break; + if (strlen(token) >= MONITOR_NAME_LEN) { + printf(_("%s: max monitor name length" + " (%d) exceeded\n"), token, MONITOR_NAME_LEN); + continue; + } + + for (num = 0; num < avail_monitors; num++) { + if (!strcmp(monitors[num]->name, token)) { + dprint("Found requested monitor: %s\n", token); + tmp_mons[hits] = monitors[num]; + hits++; + } + } + } + if (hits == 0) { + printf(_("No matching monitor found in %s, " + "try -l option\n"), param); + monitor_help(); + exit(EXIT_FAILURE); + } + /* Override detected/registerd monitors array with requested one */ + memcpy(monitors, tmp_mons, sizeof(struct cpuidle_monitor*) * MONITORS_MAX); + avail_monitors = hits; +} + +void list_monitors(void) { + unsigned int mon; + int state; + cstate_t s; + + for (mon = 0; mon < avail_monitors; mon++) { + printf(_("Monitor \"%s\" (%d states) - Might overflow after %u " + "s\n"), monitors[mon]->name, monitors[mon]->hw_states_num, + monitors[mon]->overflow_s); + + for (state = 0; state < monitors[mon]->hw_states_num; state++) { + s = monitors[mon]->hw_states[state]; + /* + * ToDo show more state capabilities: + * percent, time (granlarity) + */ + printf("%s\t[%c] -> %s\n", s.name, range_abbr[s.range], + gettext(s.desc)); + } + } +} + +int fork_it(char **argv) +{ + int status; + unsigned int num; + unsigned long long timediff; + pid_t child_pid; + struct timespec start, end; + + child_pid = fork(); + clock_gettime(CLOCK_REALTIME, &start); + + for (num = 0; num < avail_monitors; num++) + monitors[num]->start(); + + if (!child_pid) { + /* child */ + execvp(argv[0], argv); + } else { + /* parent */ + if (child_pid == -1) { + perror("fork"); + exit(1); + } + + signal(SIGINT, SIG_IGN); + signal(SIGQUIT, SIG_IGN); + if (waitpid(child_pid, &status, 0) == -1) { + perror("wait"); + exit(1); + } + } + clock_gettime(CLOCK_REALTIME, &end); + for (num = 0; num < avail_monitors; num++) + monitors[num]->stop(); + + timediff = timespec_diff_us(start, end); + if (WIFEXITED(status)) + printf(_("%s took %.5f seconds and exited with status %d\n"), + argv[0], timediff / (1000.0 * 1000), WEXITSTATUS(status)); + return 0; +} + +int do_interval_measure(int i) +{ + unsigned int num; + + for (num = 0; num < avail_monitors; num++) { + dprint("HW C-state residency monitor: %s - States: %d\n", + monitors[num]->name, monitors[num]->hw_states_num); + monitors[num]->start(); + } + sleep(i); + for (num = 0; num < avail_monitors; num++) { + monitors[num]->stop(); + } + return 0; +} + +static void cmdline(int argc, char *argv[]) +{ + int opt; + progname = basename(argv[0]); + + while ((opt = getopt(argc, argv, "+hli:m:")) != -1) { + switch (opt) { + case 'h': + monitor_help(); + exit(EXIT_SUCCESS); + case 'l': + if (mode) { + monitor_help(); + exit(EXIT_FAILURE); + } + mode = list; + break; + case 'i': + /* only allow -i with -m or no option */ + if (mode && mode != show) { + monitor_help(); + exit(EXIT_FAILURE); + } + interval = atoi(optarg); + break; + case 'm': + if (mode) { + monitor_help(); + exit(EXIT_FAILURE); + } + mode = show; + show_monitors_param = optarg; + break; + default: + monitor_help(); + exit(EXIT_FAILURE); + } + } + if (!mode) + mode = show_all; +} + +int cmd_monitor(int argc, char **argv) +{ + unsigned int num; + struct cpuidle_monitor *test_mon; + int cpu; + + cmdline(argc, argv); + cpu_count = get_cpu_topology(&cpu_top); + if (cpu_count < 0) { + printf(_("Cannot read number of available processors\n")); + return EXIT_FAILURE; + } + + dprint("System has up to %d CPU cores\n", cpu_count); + + for (num = 0; all_monitors[num]; num++) { + dprint("Try to register: %s\n", all_monitors[num]->name); + test_mon = all_monitors[num]->do_register(); + if (test_mon) { + if (test_mon->needs_root && !run_as_root) { + fprintf(stderr, _("Available monitor %s needs " + "root access\n"), test_mon->name); + continue; + } + monitors[avail_monitors] = test_mon; + dprint("%s registered\n", all_monitors[num]->name); + avail_monitors++; + } + } + + if (avail_monitors == 0) { + printf(_("No HW Cstate monitors found\n")); + return 1; + } + + if (mode == list) { + list_monitors(); + exit(EXIT_SUCCESS); + } + + if (mode == show) + parse_monitor_param(show_monitors_param); + + dprint("Packages: %d - Cores: %d - CPUs: %d\n", + cpu_top.pkgs, cpu_top.cores, cpu_count); + + /* + * if any params left, it must be a command to fork + */ + if (argc - optind) + fork_it(argv + optind); + else + do_interval_measure(interval); + + /* ToDo: Topology parsing needs fixing first to do + this more generically */ + if (cpu_top.pkgs > 1) + print_header(3); + else + print_header(1); + + for (cpu = 0; cpu < cpu_count; cpu++) { + if (cpu_top.pkgs > 1) + print_results(3, cpu); + else + print_results(1, cpu); + } + + for (num = 0; num < avail_monitors; num++) { + monitors[num]->unregister(); + } + cpu_topology_release(cpu_top); + return 0; +} |