htop/openbsd/OpenBSDProcessList.c

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/*
htop - OpenBSDProcessList.c
(C) 2014 Hisham H. Muhammad
(C) 2015 Michael McConville
Released under the GNU GPLv2, see the COPYING file
in the source distribution for its full text.
*/
#include "CRT.h"
#include "ProcessList.h"
#include "OpenBSDProcessList.h"
#include "OpenBSDProcess.h"
#include "Macros.h"
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/mount.h>
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/resource.h>
#include <sys/sched.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#include <sys/user.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static long fscale;
ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* pidMatchList, uid_t userId) {
int mib[] = { CTL_HW, HW_NCPU };
int fmib[] = { CTL_KERN, KERN_FSCALE };
int i, e;
OpenBSDProcessList* opl;
ProcessList* pl;
size_t size;
char errbuf[_POSIX2_LINE_MAX];
opl = xCalloc(1, sizeof(OpenBSDProcessList));
pl = (ProcessList*) opl;
size = sizeof(pl->cpuCount);
ProcessList_init(pl, Class(OpenBSDProcess), usersTable, pidMatchList, userId);
e = sysctl(mib, 2, &pl->cpuCount, &size, NULL, 0);
if (e == -1 || pl->cpuCount < 1) {
pl->cpuCount = 1;
}
opl->cpus = xCalloc(pl->cpuCount + 1, sizeof(CPUData));
size = sizeof(fscale);
if (sysctl(fmib, 2, &fscale, &size, NULL, 0) < 0) {
err(1, "fscale sysctl call failed");
}
for (i = 0; i <= pl->cpuCount; i++) {
CPUData *d = opl->cpus + i;
d->totalTime = 1;
d->totalPeriod = 1;
}
opl->kd = kvm_openfiles(NULL, NULL, NULL, KVM_NO_FILES, errbuf);
if (opl->kd == NULL) {
errx(1, "kvm_open: %s", errbuf);
}
return pl;
}
void ProcessList_delete(ProcessList* this) {
const OpenBSDProcessList* opl = (OpenBSDProcessList*) this;
if (opl->kd) {
kvm_close(opl->kd);
}
free(opl->cpus);
ProcessList_done(this);
free(this);
}
static inline void OpenBSDProcessList_scanMemoryInfo(ProcessList* pl) {
static int uvmexp_mib[] = {CTL_VM, VM_UVMEXP};
struct uvmexp uvmexp;
size_t size_uvmexp = sizeof(uvmexp);
if (sysctl(uvmexp_mib, 2, &uvmexp, &size_uvmexp, NULL, 0) < 0) {
err(1, "uvmexp sysctl call failed");
}
pl->totalMem = uvmexp.npages * CRT_pageSizeKB;
// Taken from OpenBSD systat/iostat.c, top/machine.c and uvm_sysctl(9)
static int bcache_mib[] = {CTL_VFS, VFS_GENERIC, VFS_BCACHESTAT};
struct bcachestats bcstats;
size_t size_bcstats = sizeof(bcstats);
if (sysctl(bcache_mib, 3, &bcstats, &size_bcstats, NULL, 0) < 0) {
err(1, "cannot get vfs.bcachestat");
}
pl->cachedMem = bcstats.numbufpages * CRT_pageSizeKB;
pl->freeMem = uvmexp.free * CRT_pageSizeKB;
pl->usedMem = (uvmexp.npages - uvmexp.free - uvmexp.paging) * CRT_pageSizeKB;
/*
const OpenBSDProcessList* opl = (OpenBSDProcessList*) pl;
size_t len = sizeof(pl->totalMem);
sysctl(MIB_hw_physmem, 2, &(pl->totalMem), &len, NULL, 0);
pl->totalMem /= 1024;
sysctl(MIB_vm_stats_vm_v_wire_count, 4, &(pl->usedMem), &len, NULL, 0);
pl->usedMem *= CRT_pageSizeKB;
pl->freeMem = pl->totalMem - pl->usedMem;
sysctl(MIB_vm_stats_vm_v_cache_count, 4, &(pl->cachedMem), &len, NULL, 0);
pl->cachedMem *= CRT_pageSizeKB;
struct kvm_swap swap[16];
int nswap = kvm_getswapinfo(opl->kd, swap, ARRAYSIZE(swap), 0);
pl->totalSwap = 0;
pl->usedSwap = 0;
for (int i = 0; i < nswap; i++) {
pl->totalSwap += swap[i].ksw_total;
pl->usedSwap += swap[i].ksw_used;
}
pl->totalSwap *= CRT_pageSizeKB;
pl->usedSwap *= CRT_pageSizeKB;
pl->sharedMem = 0; // currently unused
pl->buffersMem = 0; // not exposed to userspace
*/
}
char *OpenBSDProcessList_readProcessName(kvm_t* kd, struct kinfo_proc* kproc, int* basenameEnd) {
char *s, **arg;
size_t len = 0, n;
int i;
/*
* Like OpenBSD's top(1), we try to fall back to the command name
* (argv[0]) if we fail to construct the full command.
*/
arg = kvm_getargv(kd, kproc, 500);
if (arg == NULL || *arg == NULL) {
*basenameEnd = strlen(kproc->p_comm);
return xStrdup(kproc->p_comm);
}
for (i = 0; arg[i] != NULL; i++) {
len += strlen(arg[i]) + 1; /* room for arg and trailing space or NUL */
}
/* don't use xMalloc here - we want to handle huge argv's gracefully */
if ((s = malloc(len)) == NULL) {
*basenameEnd = strlen(kproc->p_comm);
return xStrdup(kproc->p_comm);
}
*s = '\0';
for (i = 0; arg[i] != NULL; i++) {
n = strlcat(s, arg[i], len);
if (i == 0) {
/* TODO: rename all basenameEnd to basenameLen, make size_t */
*basenameEnd = MINIMUM(n, len-1);
}
/* the trailing space should get truncated anyway */
strlcat(s, " ", len);
}
return s;
}
/*
* Taken from OpenBSD's ps(1).
*/
static double getpcpu(const struct kinfo_proc *kp) {
if (fscale == 0)
return (0.0);
#define fxtofl(fixpt) ((double)(fixpt) / fscale)
return (100.0 * fxtofl(kp->p_pctcpu));
}
static inline void OpenBSDProcessList_scanProcs(OpenBSDProcessList* this) {
Settings* settings = this->super.settings;
bool hideKernelThreads = settings->hideKernelThreads;
bool hideUserlandThreads = settings->hideUserlandThreads;
struct kinfo_proc* kproc;
bool preExisting;
Process* proc;
OpenBSDProcess* fp;
int count = 0;
int i;
// use KERN_PROC_KTHREAD to also include kernel threads
struct kinfo_proc* kprocs = kvm_getprocs(this->kd, KERN_PROC_ALL, 0, sizeof(struct kinfo_proc), &count);
//struct kinfo_proc* kprocs = getprocs(KERN_PROC_ALL, 0, &count);
for (i = 0; i < count; i++) {
kproc = &kprocs[i];
preExisting = false;
proc = ProcessList_getProcess(&this->super, kproc->p_pid, &preExisting, (Process_New) OpenBSDProcess_new);
fp = (OpenBSDProcess*) proc;
proc->show = ! ((hideKernelThreads && Process_isKernelThread(proc))
|| (hideUserlandThreads && Process_isUserlandThread(proc)));
if (!preExisting) {
proc->ppid = kproc->p_ppid;
proc->tpgid = kproc->p_tpgid;
proc->tgid = kproc->p_pid;
proc->session = kproc->p_sid;
proc->tty_nr = kproc->p_tdev;
proc->pgrp = kproc->p__pgid;
proc->st_uid = kproc->p_uid;
proc->starttime_ctime = kproc->p_ustart_sec;
Process_fillStarttimeBuffer(proc);
proc->user = UsersTable_getRef(this->super.usersTable, proc->st_uid);
ProcessList_add(&this->super, proc);
proc->comm = OpenBSDProcessList_readProcessName(this->kd, kproc, &proc->basenameOffset);
} else {
if (settings->updateProcessNames) {
free(proc->comm);
proc->comm = OpenBSDProcessList_readProcessName(this->kd, kproc, &proc->basenameOffset);
}
}
proc->m_size = kproc->p_vm_dsize;
proc->m_resident = kproc->p_vm_rssize;
proc->percent_mem = (proc->m_resident * CRT_pageSizeKB) / (double)(this->super.totalMem) * 100.0;
proc->percent_cpu = CLAMP(getpcpu(kproc), 0.0, this->super.cpuCount*100.0);
//proc->nlwp = kproc->p_numthreads;
//proc->time = kproc->p_rtime_sec + ((kproc->p_rtime_usec + 500000) / 10);
proc->nice = kproc->p_nice - 20;
proc->time = kproc->p_rtime_sec + ((kproc->p_rtime_usec + 500000) / 1000000);
proc->time *= 100;
proc->priority = kproc->p_priority - PZERO;
switch (kproc->p_stat) {
case SIDL: proc->state = 'I'; break;
case SRUN: proc->state = 'R'; break;
case SSLEEP: proc->state = 'S'; break;
case SSTOP: proc->state = 'T'; break;
case SZOMB: proc->state = 'Z'; break;
case SDEAD: proc->state = 'D'; break;
case SONPROC: proc->state = 'P'; break;
default: proc->state = '?';
}
if (Process_isKernelThread(proc)) {
this->super.kernelThreads++;
}
this->super.totalTasks++;
// SRUN ('R') means runnable, not running
if (proc->state == 'P') {
this->super.runningTasks++;
}
proc->updated = true;
}
}
static unsigned long long saturatingSub(unsigned long long a, unsigned long long b) {
return a > b ? a - b : 0;
}
static void getKernelCPUTimes(int cpuId, u_int64_t* times) {
int mib[] = { CTL_KERN, KERN_CPTIME2, cpuId };
size_t length = sizeof(u_int64_t) * CPUSTATES;
if (sysctl(mib, 3, times, &length, NULL, 0) == -1 ||
length != sizeof(u_int64_t) * CPUSTATES) {
CRT_fatalError("sysctl kern.cp_time2 failed");
}
}
static void kernelCPUTimesToHtop(const u_int64_t* times, CPUData* cpu) {
unsigned long long totalTime = 0;
for (int i = 0; i < CPUSTATES; i++) {
totalTime += times[i];
}
unsigned long long sysAllTime = times[CP_INTR] + times[CP_SYS];
// XXX Not sure if CP_SPIN should be added to sysAllTime.
// See https://github.com/openbsd/src/commit/531d8034253fb82282f0f353c086e9ad827e031c
#ifdef CP_SPIN
sysAllTime += times[CP_SPIN];
#endif
cpu->totalPeriod = saturatingSub(totalTime, cpu->totalTime);
cpu->userPeriod = saturatingSub(times[CP_USER], cpu->userTime);
cpu->nicePeriod = saturatingSub(times[CP_NICE], cpu->niceTime);
cpu->sysPeriod = saturatingSub(times[CP_SYS], cpu->sysTime);
cpu->sysAllPeriod = saturatingSub(sysAllTime, cpu->sysAllTime);
#ifdef CP_SPIN
cpu->spinPeriod = saturatingSub(times[CP_SPIN], cpu->spinTime);
#endif
cpu->intrPeriod = saturatingSub(times[CP_INTR], cpu->intrTime);
cpu->idlePeriod = saturatingSub(times[CP_IDLE], cpu->idleTime);
cpu->totalTime = totalTime;
cpu->userTime = times[CP_USER];
cpu->niceTime = times[CP_NICE];
cpu->sysTime = times[CP_SYS];
cpu->sysAllTime = sysAllTime;
#ifdef CP_SPIN
cpu->spinTime = times[CP_SPIN];
#endif
cpu->intrTime = times[CP_INTR];
cpu->idleTime = times[CP_IDLE];
}
static void OpenBSDProcessList_scanCPUTime(OpenBSDProcessList* this) {
u_int64_t kernelTimes[CPUSTATES] = {0};
u_int64_t avg[CPUSTATES] = {0};
for (int i = 0; i < this->super.cpuCount; i++) {
getKernelCPUTimes(i, kernelTimes);
CPUData* cpu = this->cpus + i + 1;
kernelCPUTimesToHtop(kernelTimes, cpu);
avg[CP_USER] += cpu->userTime;
avg[CP_NICE] += cpu->niceTime;
avg[CP_SYS] += cpu->sysTime;
#ifdef CP_SPIN
avg[CP_SPIN] += cpu->spinTime;
#endif
avg[CP_INTR] += cpu->intrTime;
avg[CP_IDLE] += cpu->idleTime;
}
for (int i = 0; i < CPUSTATES; i++) {
avg[i] /= this->super.cpuCount;
}
kernelCPUTimesToHtop(avg, this->cpus);
}
void ProcessList_goThroughEntries(ProcessList* this) {
OpenBSDProcessList* opl = (OpenBSDProcessList*) this;
OpenBSDProcessList_scanMemoryInfo(this);
OpenBSDProcessList_scanProcs(opl);
OpenBSDProcessList_scanCPUTime(opl);
}