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@ -63,6 +63,11 @@ static struct { |
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size_t len; |
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} process_title; |
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static void read_models(unsigned int numcpus, uv_cpu_info_t* ci); |
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static void read_speeds(unsigned int numcpus, uv_cpu_info_t* ci); |
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static void read_times(unsigned int numcpus, uv_cpu_info_t* ci); |
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static unsigned long read_cpufreq(unsigned int cpunum); |
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/*
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* There's probably some way to get time from Linux than gettimeofday(). What |
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@ -301,81 +306,163 @@ uv_err_t uv_uptime(double* uptime) { |
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uv_err_t uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count) { |
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unsigned int ticks = (unsigned int)sysconf(_SC_CLK_TCK), |
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multiplier = ((uint64_t)1000L / ticks), cpuspeed; |
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int numcpus = 0, i = 0; |
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unsigned long ticks_user, ticks_sys, ticks_idle, ticks_nice, ticks_intr; |
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char line[512], speedPath[256], model[512]; |
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FILE *fpStat = fopen("/proc/stat", "r"); |
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FILE *fpModel = fopen("/proc/cpuinfo", "r"); |
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FILE *fpSpeed; |
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uv_cpu_info_t* cpu_info; |
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if (fpModel) { |
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while (fgets(line, 511, fpModel) != NULL) { |
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if (strncmp(line, "model name", 10) == 0) { |
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numcpus++; |
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if (numcpus == 1) { |
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char *p = strchr(line, ':') + 2; |
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strcpy(model, p); |
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model[strlen(model)-1] = 0; |
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} |
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} else if (strncmp(line, "cpu MHz", 7) == 0) { |
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if (numcpus == 1) { |
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sscanf(line, "%*s %*s : %u", &cpuspeed); |
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} |
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} |
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} |
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fclose(fpModel); |
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} |
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unsigned int numcpus; |
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uv_cpu_info_t* ci; |
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*cpu_infos = (uv_cpu_info_t*)malloc(numcpus * sizeof(uv_cpu_info_t)); |
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if (!(*cpu_infos)) { |
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return uv__new_artificial_error(UV_ENOMEM); |
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} |
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*cpu_infos = NULL; |
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*count = 0; |
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numcpus = sysconf(_SC_NPROCESSORS_ONLN); |
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assert(numcpus != (unsigned int) -1); |
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assert(numcpus != 0); |
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ci = calloc(numcpus, sizeof(*ci)); |
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if (ci == NULL) |
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return uv__new_sys_error(ENOMEM); |
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read_speeds(numcpus, ci); |
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read_models(numcpus, ci); |
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read_times(numcpus, ci); |
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*cpu_infos = ci; |
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*count = numcpus; |
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cpu_info = *cpu_infos; |
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return uv_ok_; |
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} |
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if (fpStat) { |
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while (fgets(line, 511, fpStat) != NULL) { |
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if (strncmp(line, "cpu ", 4) == 0) { |
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continue; |
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} else if (strncmp(line, "cpu", 3) != 0) { |
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static void read_speeds(unsigned int numcpus, uv_cpu_info_t* ci) { |
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unsigned int num; |
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for (num = 0; num < numcpus; num++) |
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ci[num].speed = read_cpufreq(num) / 1000; |
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} |
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static void read_models(unsigned int numcpus, uv_cpu_info_t* ci) { |
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#if defined(__i386__) || defined(__x86_64__) |
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static const char marker[] = "model name\t: "; |
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#elif defined(__arm__) |
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static const char marker[] = "Processor\t: "; |
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#elif defined(__mips__) |
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static const char marker[] = "cpu model\t\t: "; |
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#else |
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# warning uv_cpu_info() is not supported on this architecture. |
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static const char marker[] = "(dummy)"; |
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#endif |
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unsigned int num; |
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char buf[1024]; |
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char* model; |
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FILE* fp; |
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fp = fopen("/proc/cpuinfo", "r"); |
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if (fp == NULL) |
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return; |
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num = 0; |
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while (fgets(buf, sizeof(buf), fp)) { |
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if (num >= numcpus) |
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break; |
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if (strncmp(buf, marker, sizeof(marker) - 1)) |
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continue; |
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model = buf + sizeof(marker) - 1; |
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model = strndup(model, strlen(model) - 1); /* strip newline */ |
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ci[num++].model = model; |
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} |
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fclose(fp); |
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} |
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sscanf(line, "%*s %lu %lu %lu %lu %*s %lu", |
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&ticks_user, &ticks_nice, &ticks_sys, &ticks_idle, &ticks_intr); |
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snprintf(speedPath, sizeof(speedPath), |
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"/sys/devices/system/cpu/cpu%u/cpufreq/cpuinfo_max_freq", i); |
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fpSpeed = fopen(speedPath, "r"); |
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static void read_times(unsigned int numcpus, uv_cpu_info_t* ci) { |
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unsigned long clock_ticks; |
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struct uv_cpu_times_s ts; |
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unsigned long user; |
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unsigned long nice; |
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unsigned long sys; |
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unsigned long idle; |
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unsigned long dummy; |
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unsigned long irq; |
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unsigned int num; |
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unsigned int len; |
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char buf[1024]; |
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FILE* fp; |
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if (fpSpeed) { |
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if (fgets(line, 511, fpSpeed) != NULL) { |
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sscanf(line, "%u", &cpuspeed); |
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cpuspeed /= 1000; |
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} |
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fclose(fpSpeed); |
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} |
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clock_ticks = sysconf(_SC_CLK_TCK); |
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assert(clock_ticks != (unsigned long) -1); |
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assert(clock_ticks != 0); |
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fp = fopen("/proc/stat", "r"); |
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if (fp == NULL) |
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return; |
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if (!fgets(buf, sizeof(buf), fp)) |
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abort(); |
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cpu_info->cpu_times.user = ticks_user * multiplier; |
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cpu_info->cpu_times.nice = ticks_nice * multiplier; |
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cpu_info->cpu_times.sys = ticks_sys * multiplier; |
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cpu_info->cpu_times.idle = ticks_idle * multiplier; |
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cpu_info->cpu_times.irq = ticks_intr * multiplier; |
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num = 0; |
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cpu_info->model = strdup(model); |
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cpu_info->speed = cpuspeed; |
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while (fgets(buf, sizeof(buf), fp)) { |
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if (num >= numcpus) |
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break; |
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if (strncmp(buf, "cpu", 3)) |
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break; |
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cpu_info++; |
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/* skip "cpu<num> " marker */ |
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{ |
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unsigned int n = num; |
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for (len = sizeof("cpu0"); n /= 10; len++); |
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assert(sscanf(buf, "cpu%u ", &n) == 1 && n == num); |
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} |
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fclose(fpStat); |
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/* Line contains user, nice, system, idle, iowait, irq, softirq, steal,
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* guest, guest_nice but we're only interested in the first four + irq. |
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* |
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* Don't use %*s to skip fields or %ll to read straight into the uint64_t |
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* fields, they're not allowed in C89 mode. |
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*/ |
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if (6 != sscanf(buf + len, |
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"%lu %lu %lu %lu %lu %lu", |
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&user, |
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&nice, |
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&sys, |
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&idle, |
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&dummy, |
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&irq)) |
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abort(); |
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ts.user = clock_ticks * user; |
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ts.nice = clock_ticks * nice; |
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ts.sys = clock_ticks * sys; |
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ts.idle = clock_ticks * idle; |
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ts.irq = clock_ticks * irq; |
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ci[num++].cpu_times = ts; |
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} |
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fclose(fp); |
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} |
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return uv_ok_; |
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static unsigned long read_cpufreq(unsigned int cpunum) { |
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unsigned long val; |
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char buf[1024]; |
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FILE* fp; |
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snprintf(buf, |
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sizeof(buf), |
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"/sys/devices/system/cpu/cpu%u/cpufreq/scaling_cur_freq", |
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cpunum); |
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fp = fopen(buf, "r"); |
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if (fp == NULL) |
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return 0; |
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val = 0; |
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fscanf(fp, "%lu", &val); |
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fclose(fp); |
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return val; |
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} |
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