mirror of https://github.com/htop-dev/htop.git
286 lines
8.0 KiB
C
286 lines
8.0 KiB
C
/*
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htop - NetBSDMachine.c
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(C) 2014 Hisham H. Muhammad
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(C) 2015 Michael McConville
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(C) 2021 Santhosh Raju
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(C) 2021 htop dev team
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Released under the GNU GPLv2+, see the COPYING file
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in the source distribution for its full text.
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*/
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#include "config.h" // IWYU pragma: keep
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#include "netbsd/NetBSDMachine.h"
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#include <kvm.h>
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#include <math.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/mount.h>
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/sched.h>
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#include <sys/swap.h>
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#include <sys/sysctl.h>
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#include <sys/types.h>
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#include <uvm/uvm_extern.h>
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#include "CRT.h"
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#include "Machine.h"
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#include "Macros.h"
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#include "Object.h"
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#include "Settings.h"
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#include "XUtils.h"
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static const struct {
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const char* name;
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long int scale;
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} freqSysctls[] = {
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{ "machdep.est.frequency.current", 1 },
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{ "machdep.powernow.frequency.current", 1 },
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{ "machdep.intrepid.frequency.current", 1 },
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{ "machdep.loongson.frequency.current", 1 },
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{ "machdep.cpu.frequency.current", 1 },
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{ "machdep.frequency.current", 1 },
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{ "machdep.tsc_freq", 1000000 },
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};
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static void NetBSDMachine_updateCPUcount(NetBSDMachine* this) {
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Machine* super = &this->super;
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// Definitions for sysctl(3), cf. https://nxr.netbsd.org/xref/src/sys/sys/sysctl.h#813
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const int mib_ncpu_existing[] = { CTL_HW, HW_NCPU }; // Number of existing CPUs
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const int mib_ncpu_online[] = { CTL_HW, HW_NCPUONLINE }; // Number of online/active CPUs
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int r;
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unsigned int value;
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size_t size;
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bool change = false;
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// Query the number of active/online CPUs.
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size = sizeof(value);
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r = sysctl(mib_ncpu_online, 2, &value, &size, NULL, 0);
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if (r < 0 || value < 1) {
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value = 1;
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}
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if (value != super->activeCPUs) {
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super->activeCPUs = value;
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change = true;
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}
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// Query the total number of CPUs.
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size = sizeof(value);
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r = sysctl(mib_ncpu_existing, 2, &value, &size, NULL, 0);
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if (r < 0 || value < 1) {
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value = super->activeCPUs;
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}
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if (value != super->existingCPUs) {
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this->cpuData = xReallocArray(this->cpuData, value + 1, sizeof(CPUData));
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super->existingCPUs = value;
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change = true;
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}
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// Reset CPU stats when number of online/existing CPU cores changed
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if (change) {
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CPUData* dAvg = &this->cpuData[0];
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memset(dAvg, '\0', sizeof(CPUData));
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dAvg->totalTime = 1;
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dAvg->totalPeriod = 1;
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for (unsigned int i = 0; i < super->existingCPUs; i++) {
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CPUData* d = &this->cpuData[i + 1];
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memset(d, '\0', sizeof(CPUData));
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d->totalTime = 1;
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d->totalPeriod = 1;
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}
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}
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}
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Machine* Machine_new(UsersTable* usersTable, uid_t userId) {
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const int fmib[] = { CTL_KERN, KERN_FSCALE };
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size_t size;
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char errbuf[_POSIX2_LINE_MAX];
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NetBSDMachine* this = xCalloc(1, sizeof(NetBSDMachine));
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Machine* super = &this->super;
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Machine_init(super, usersTable, userId);
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NetBSDMachine_updateCPUcount(this);
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size = sizeof(this->fscale);
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if (sysctl(fmib, 2, &this->fscale, &size, NULL, 0) < 0 || this->fscale <= 0) {
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CRT_fatalError("fscale sysctl call failed");
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}
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if ((this->pageSize = sysconf(_SC_PAGESIZE)) == -1)
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CRT_fatalError("pagesize sysconf call failed");
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this->pageSizeKB = this->pageSize / ONE_K;
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this->kd = kvm_openfiles(NULL, NULL, NULL, KVM_NO_FILES, errbuf);
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if (this->kd == NULL) {
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CRT_fatalError("kvm_openfiles() failed");
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}
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return super;
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}
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void Machine_delete(Machine* super) {
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NetBSDMachine* this = (NetBSDMachine*) super;
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Machine_done(super);
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if (this->kd) {
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kvm_close(this->kd);
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}
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free(this->cpuData);
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free(this);
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}
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static void NetBSDMachine_scanMemoryInfo(NetBSDMachine* this) {
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Machine* super = &this->super;
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static int uvmexp_mib[] = {CTL_VM, VM_UVMEXP2};
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struct uvmexp_sysctl uvmexp;
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size_t size_uvmexp = sizeof(uvmexp);
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if (sysctl(uvmexp_mib, 2, &uvmexp, &size_uvmexp, NULL, 0) < 0) {
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CRT_fatalError("uvmexp sysctl call failed");
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}
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super->totalMem = uvmexp.npages * this->pageSizeKB;
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super->buffersMem = 0;
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super->cachedMem = (uvmexp.filepages + uvmexp.execpages) * this->pageSizeKB;
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super->usedMem = (uvmexp.active + uvmexp.wired) * this->pageSizeKB;
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super->totalSwap = uvmexp.swpages * this->pageSizeKB;
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super->usedSwap = uvmexp.swpginuse * this->pageSizeKB;
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}
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static void getKernelCPUTimes(int cpuId, u_int64_t* times) {
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const int mib[] = { CTL_KERN, KERN_CP_TIME, cpuId };
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size_t length = sizeof(*times) * CPUSTATES;
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if (sysctl(mib, 3, times, &length, NULL, 0) == -1 || length != sizeof(*times) * CPUSTATES) {
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CRT_fatalError("sysctl kern.cp_time2 failed");
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}
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}
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static void kernelCPUTimesToHtop(const u_int64_t* times, CPUData* cpu) {
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unsigned long long totalTime = 0;
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for (int i = 0; i < CPUSTATES; i++) {
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totalTime += times[i];
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}
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unsigned long long sysAllTime = times[CP_INTR] + times[CP_SYS];
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cpu->totalPeriod = saturatingSub(totalTime, cpu->totalTime);
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cpu->userPeriod = saturatingSub(times[CP_USER], cpu->userTime);
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cpu->nicePeriod = saturatingSub(times[CP_NICE], cpu->niceTime);
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cpu->sysPeriod = saturatingSub(times[CP_SYS], cpu->sysTime);
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cpu->sysAllPeriod = saturatingSub(sysAllTime, cpu->sysAllTime);
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cpu->intrPeriod = saturatingSub(times[CP_INTR], cpu->intrTime);
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cpu->idlePeriod = saturatingSub(times[CP_IDLE], cpu->idleTime);
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cpu->totalTime = totalTime;
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cpu->userTime = times[CP_USER];
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cpu->niceTime = times[CP_NICE];
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cpu->sysTime = times[CP_SYS];
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cpu->sysAllTime = sysAllTime;
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cpu->intrTime = times[CP_INTR];
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cpu->idleTime = times[CP_IDLE];
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}
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static void NetBSDMachine_scanCPUTime(NetBSDMachine* this) {
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const Machine* super = &this->super;
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u_int64_t kernelTimes[CPUSTATES] = {0};
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u_int64_t avg[CPUSTATES] = {0};
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for (unsigned int i = 0; i < super->existingCPUs; i++) {
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getKernelCPUTimes(i, kernelTimes);
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CPUData* cpu = &this->cpuData[i + 1];
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kernelCPUTimesToHtop(kernelTimes, cpu);
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avg[CP_USER] += cpu->userTime;
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avg[CP_NICE] += cpu->niceTime;
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avg[CP_SYS] += cpu->sysTime;
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avg[CP_INTR] += cpu->intrTime;
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avg[CP_IDLE] += cpu->idleTime;
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}
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for (int i = 0; i < CPUSTATES; i++) {
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avg[i] /= super->activeCPUs;
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}
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kernelCPUTimesToHtop(avg, &this->cpuData[0]);
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}
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static void NetBSDMachine_scanCPUFrequency(NetBSDMachine* this) {
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const Machine* super = &this->super;
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unsigned int cpus = super->existingCPUs;
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bool match = false;
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char name[64];
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long int freq = 0;
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size_t freqSize;
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for (unsigned int i = 0; i < cpus; i++) {
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this->cpuData[i + 1].frequency = NAN;
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}
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/* newer hardware supports per-core frequency, for e.g. ARM big.LITTLE */
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for (unsigned int i = 0; i < cpus; i++) {
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xSnprintf(name, sizeof(name), "machdep.cpufreq.cpu%u.current", i);
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freqSize = sizeof(freq);
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if (sysctlbyname(name, &freq, &freqSize, NULL, 0) != -1) {
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this->cpuData[i + 1].frequency = freq; /* already in MHz */
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match = true;
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}
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}
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if (match) {
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return;
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}
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/*
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* Iterate through legacy sysctl nodes for single-core frequency until
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* we find a match...
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*/
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for (size_t i = 0; i < ARRAYSIZE(freqSysctls); i++) {
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freqSize = sizeof(freq);
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if (sysctlbyname(freqSysctls[i].name, &freq, &freqSize, NULL, 0) != -1) {
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freq /= freqSysctls[i].scale; /* scale to MHz */
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match = true;
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break;
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}
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}
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if (match) {
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for (unsigned int i = 0; i < cpus; i++) {
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this->cpuData[i + 1].frequency = freq;
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}
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}
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}
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void Machine_scan(Machine* super) {
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NetBSDMachine* this = (NetBSDMachine*) super;
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NetBSDMachine_scanMemoryInfo(this);
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NetBSDMachine_scanCPUTime(this);
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if (super->settings->showCPUFrequency) {
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NetBSDMachine_scanCPUFrequency(this);
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}
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}
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bool Machine_isCPUonline(const Machine* host, unsigned int id) {
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assert(id < host->existingCPUs);
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(void)host; (void)id;
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// TODO: Support detecting online / offline CPUs.
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return true;
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}
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