mirror of https://github.com/xzeldon/htop.git
Read CPU frequency from sysfs by default
Use the more portable sysfs node /sys/devices/system/cpu/cpuX/cpufreq/scaling_cur_freq to get the CPU frequency. In case of an error fall back to /proc/cpuinfo . Also use a fixed width of 4 for the frequency to avoid position jumps in case the frequency moves in the range 900-1100 MHz.
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@ -45,7 +45,7 @@ static void CPUMeter_updateValues(Meter* this, char* buffer, int size) {
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if (isnan(cpuFrequency)) {
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xSnprintf(cpuFrequencyBuffer, sizeof(cpuFrequencyBuffer), "N/A");
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} else {
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xSnprintf(cpuFrequencyBuffer, sizeof(cpuFrequencyBuffer), "%.0fMHz", cpuFrequency);
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xSnprintf(cpuFrequencyBuffer, sizeof(cpuFrequencyBuffer), "%4uMHz", (unsigned)cpuFrequency);
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}
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if (this->pl->settings->showCPUUsage) {
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xSnprintf(buffer, size, "%5.1f%% %s", percent, cpuFrequencyBuffer);
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@ -1145,79 +1145,105 @@ static inline double LinuxProcessList_scanCPUTime(LinuxProcessList* this) {
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return period;
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}
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static inline double LinuxProcessList_scanCPUFrequency(LinuxProcessList* this) {
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ProcessList* pl = (ProcessList*) this;
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Settings* settings = pl->settings;
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static int scanCPUFreqencyFromSysCPUFreq(LinuxProcessList* this) {
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int cpus = this->super.cpuCount;
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int numCPUsWithFrequency = 0;
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unsigned long totalFrequency = 0;
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for (int i = 0; i < cpus; ++i) {
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char pathBuffer[64];
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xSnprintf(pathBuffer, sizeof(pathBuffer), "/sys/devices/system/cpu/cpu%d/cpufreq/scaling_cur_freq", i);
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FILE* file = fopen(pathBuffer, "r");
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if (!file)
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return -errno;
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unsigned long frequency;
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if (fscanf(file, "%lu", &frequency) == 1) {
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/* convert kHz to MHz */
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frequency = frequency / 1000;
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this->cpus[i + 1].frequency = frequency;
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numCPUsWithFrequency++;
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totalFrequency += frequency;
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}
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fclose(file);
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}
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if (numCPUsWithFrequency > 0)
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this->cpus[0].frequency = (double)totalFrequency / numCPUsWithFrequency;
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return 0;
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}
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static void scanCPUFreqencyFromCPUinfo(LinuxProcessList* this) {
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FILE* file = fopen(PROCCPUINFOFILE, "r");
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if (file == NULL)
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return;
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int cpus = this->super.cpuCount;
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int numCPUsWithFrequency = 0;
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double totalFrequency = 0;
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int cpuid = -1;
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while (!feof(file)) {
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double frequency;
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char buffer[PROC_LINE_LENGTH];
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if (fgets(buffer, PROC_LINE_LENGTH, file) == NULL)
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break;
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if (
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(sscanf(buffer, "processor : %d", &cpuid) == 1) ||
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(sscanf(buffer, "processor: %d", &cpuid) == 1)
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) {
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continue;
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} else if (
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(sscanf(buffer, "cpu MHz : %lf", &frequency) == 1) ||
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(sscanf(buffer, "cpu MHz: %lf", &frequency) == 1)
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) {
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if (cpuid < 0 || cpuid > (cpus - 1))
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continue;
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CPUData* cpuData = &(this->cpus[cpuid + 1]);
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/* do not override sysfs data */
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if (isnan(cpuData->frequency))
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cpuData->frequency = frequency;
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numCPUsWithFrequency++;
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totalFrequency += frequency;
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} else if (buffer[0] == '\n') {
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cpuid = -1;
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}
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}
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fclose(file);
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if (numCPUsWithFrequency > 0)
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this->cpus[0].frequency = totalFrequency / numCPUsWithFrequency;
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}
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static void LinuxProcessList_scanCPUFrequency(LinuxProcessList* this) {
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int cpus = this->super.cpuCount;
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assert(cpus > 0);
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for (int i = 0; i <= cpus; i++) {
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CPUData* cpuData = &(this->cpus[i]);
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cpuData->frequency = NAN;
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}
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for (int i = 0; i <= cpus; i++)
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this->cpus[i].frequency = NAN;
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int numCPUsWithFrequency = 0;
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double totalFrequency = 0;
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if (scanCPUFreqencyFromSysCPUFreq(this) == 0)
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return;
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if (settings->showCPUFrequency) {
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FILE* file = fopen(PROCCPUINFOFILE, "r");
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if (file == NULL) {
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CRT_fatalError("Cannot open " PROCCPUINFOFILE);
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}
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int cpuid = -1;
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double frequency;
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while (!feof(file)) {
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char buffer[PROC_LINE_LENGTH];
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char *ok = fgets(buffer, PROC_LINE_LENGTH, file);
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if (!ok) break;
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if (
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(sscanf(buffer, "processor : %d", &cpuid) == 1) ||
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(sscanf(buffer, "processor: %d", &cpuid) == 1)
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) {
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if (cpuid < 0 || cpuid > (cpus - 1)) {
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char tmpbuffer[64];
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xSnprintf(tmpbuffer, sizeof(tmpbuffer), PROCCPUINFOFILE " contains out-of-range CPU number %d", cpuid);
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CRT_fatalError(tmpbuffer);
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}
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} else if (
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(sscanf(buffer, "cpu MHz : %lf", &frequency) == 1) ||
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(sscanf(buffer, "cpu MHz: %lf", &frequency) == 1)
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) {
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if (cpuid < 0 || cpuid > (cpus - 1)) {
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CRT_fatalError(PROCCPUINFOFILE " is malformed: cpu MHz line without corresponding processor line");
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}
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int cpu = cpuid + 1;
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CPUData* cpuData = &(this->cpus[cpu]);
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cpuData->frequency = frequency;
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numCPUsWithFrequency++;
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totalFrequency += frequency;
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} else if (buffer[0] == '\n') {
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cpuid = -1;
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}
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}
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fclose(file);
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if (numCPUsWithFrequency > 0) {
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this->cpus[0].frequency = totalFrequency / numCPUsWithFrequency;
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}
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}
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double period = (double)this->cpus[0].totalPeriod / cpus;
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return period;
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scanCPUFreqencyFromCPUinfo(this);
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}
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void ProcessList_goThroughEntries(ProcessList* super) {
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LinuxProcessList* this = (LinuxProcessList*) super;
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const Settings* settings = super->settings;
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LinuxProcessList_scanMemoryInfo(super);
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LinuxProcessList_scanZfsArcstats(this);
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double period = LinuxProcessList_scanCPUTime(this);
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LinuxProcessList_scanCPUFrequency(this);
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if (settings->showCPUFrequency)
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LinuxProcessList_scanCPUFrequency(this);
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struct timeval tv;
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gettimeofday(&tv, NULL);
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