| /* |
| htop - LinuxProcessList.c |
| (C) 2014 Hisham H. Muhammad |
| Released under the GNU GPL, see the COPYING file |
| in the source distribution for its full text. |
| */ |
| |
| #include "LinuxProcessList.h" |
| #include "LinuxProcess.h" |
| #include "CRT.h" |
| #include "String.h" |
| #include <errno.h> |
| #include <sys/time.h> |
| #include <sys/utsname.h> |
| #include <sys/stat.h> |
| #include <unistd.h> |
| #include <dirent.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <signal.h> |
| #include <stdbool.h> |
| #include <stdarg.h> |
| #include <math.h> |
| #include <string.h> |
| #include <time.h> |
| #include <assert.h> |
| #include <sys/types.h> |
| #include <fcntl.h> |
| |
| /*{ |
| |
| #include "ProcessList.h" |
| |
| typedef struct CPUData_ { |
| unsigned long long int totalTime; |
| unsigned long long int userTime; |
| unsigned long long int systemTime; |
| unsigned long long int systemAllTime; |
| unsigned long long int idleAllTime; |
| unsigned long long int idleTime; |
| unsigned long long int niceTime; |
| unsigned long long int ioWaitTime; |
| unsigned long long int irqTime; |
| unsigned long long int softIrqTime; |
| unsigned long long int stealTime; |
| unsigned long long int guestTime; |
| |
| unsigned long long int totalPeriod; |
| unsigned long long int userPeriod; |
| unsigned long long int systemPeriod; |
| unsigned long long int systemAllPeriod; |
| unsigned long long int idleAllPeriod; |
| unsigned long long int idlePeriod; |
| unsigned long long int nicePeriod; |
| unsigned long long int ioWaitPeriod; |
| unsigned long long int irqPeriod; |
| unsigned long long int softIrqPeriod; |
| unsigned long long int stealPeriod; |
| unsigned long long int guestPeriod; |
| } CPUData; |
| |
| typedef struct LinuxProcessList_ { |
| ProcessList super; |
| |
| CPUData* cpus; |
| |
| } LinuxProcessList; |
| |
| #ifndef PROCDIR |
| #define PROCDIR "/proc" |
| #endif |
| |
| #ifndef PROCSTATFILE |
| #define PROCSTATFILE PROCDIR "/stat" |
| #endif |
| |
| #ifndef PROCMEMINFOFILE |
| #define PROCMEMINFOFILE PROCDIR "/meminfo" |
| #endif |
| |
| }*/ |
| |
| ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* pidWhiteList, uid_t userId) { |
| LinuxProcessList* this = calloc(1, sizeof(LinuxProcessList)); |
| ProcessList* pl = &(this->super); |
| ProcessList_init(pl, usersTable, pidWhiteList, userId); |
| |
| // Update CPU count: |
| FILE* file = fopen(PROCSTATFILE, "r"); |
| if (file == NULL) { |
| CRT_fatalError("Cannot open " PROCSTATFILE); |
| } |
| char buffer[256]; |
| int cpus = -1; |
| do { |
| cpus++; |
| fgets(buffer, 255, file); |
| } while (String_startsWith(buffer, "cpu")); |
| fclose(file); |
| |
| pl->cpuCount = MAX(cpus - 1, 1); |
| this->cpus = calloc(cpus, sizeof(CPUData)); |
| |
| for (int i = 0; i < cpus; i++) { |
| this->cpus[i].totalTime = 1; |
| this->cpus[i].totalPeriod = 1; |
| } |
| |
| #ifdef HAVE_OPENVZ |
| this->flags |= PROCESS_FLAG_LINUX_OPENVZ; |
| #endif |
| |
| return pl; |
| } |
| |
| void ProcessList_delete(ProcessList* pl) { |
| LinuxProcessList* this = (LinuxProcessList*) pl; |
| ProcessList_done(pl); |
| free(this->cpus); |
| free(this); |
| } |
| |
| static ssize_t xread(int fd, void *buf, size_t count) { |
| // Read some bytes. Retry on EINTR and when we don't get as many bytes as we requested. |
| size_t alreadyRead = 0; |
| for(;;) { |
| ssize_t res = read(fd, buf, count); |
| if (res == -1 && errno == EINTR) continue; |
| if (res > 0) { |
| buf = ((char*)buf)+res; |
| count -= res; |
| alreadyRead += res; |
| } |
| if (res == -1) return -1; |
| if (count == 0 || res == 0) return alreadyRead; |
| } |
| } |
| |
| static double jiffy = 0.0; |
| |
| static inline unsigned long long LinuxProcess_adjustTime(unsigned long long t) { |
| if(jiffy == 0.0) jiffy = sysconf(_SC_CLK_TCK); |
| double jiffytime = 1.0 / jiffy; |
| return (unsigned long long) t * jiffytime * 100; |
| } |
| |
| static bool LinuxProcessList_readStatFile(Process *process, const char* dirname, const char* name, char* command) { |
| LinuxProcess* lp = (LinuxProcess*) process; |
| char filename[MAX_NAME+1]; |
| snprintf(filename, MAX_NAME, "%s/%s/stat", dirname, name); |
| int fd = open(filename, O_RDONLY); |
| if (fd == -1) |
| return false; |
| |
| static char buf[MAX_READ+1]; |
| |
| int size = xread(fd, buf, MAX_READ); |
| close(fd); |
| if (size <= 0) return false; |
| buf[size] = '\0'; |
| |
| assert(process->pid == atoi(buf)); |
| char *location = strchr(buf, ' '); |
| if (!location) return false; |
| |
| location += 2; |
| char *end = strrchr(location, ')'); |
| if (!end) return false; |
| |
| int commsize = end - location; |
| memcpy(command, location, commsize); |
| command[commsize] = '\0'; |
| location = end + 2; |
| |
| process->state = location[0]; |
| location += 2; |
| process->ppid = strtol(location, &location, 10); |
| location += 1; |
| process->pgrp = strtoul(location, &location, 10); |
| location += 1; |
| process->session = strtoul(location, &location, 10); |
| location += 1; |
| process->tty_nr = strtoul(location, &location, 10); |
| location += 1; |
| process->tpgid = strtol(location, &location, 10); |
| location += 1; |
| process->flags = strtoul(location, &location, 10); |
| location += 1; |
| process->minflt = strtoull(location, &location, 10); |
| location += 1; |
| lp->cminflt = strtoull(location, &location, 10); |
| location += 1; |
| process->majflt = strtoull(location, &location, 10); |
| location += 1; |
| lp->cmajflt = strtoull(location, &location, 10); |
| location += 1; |
| lp->utime = LinuxProcess_adjustTime(strtoull(location, &location, 10)); |
| location += 1; |
| lp->stime = LinuxProcess_adjustTime(strtoull(location, &location, 10)); |
| location += 1; |
| lp->cutime = LinuxProcess_adjustTime(strtoull(location, &location, 10)); |
| location += 1; |
| lp->cstime = LinuxProcess_adjustTime(strtoull(location, &location, 10)); |
| location += 1; |
| process->priority = strtol(location, &location, 10); |
| location += 1; |
| process->nice = strtol(location, &location, 10); |
| location += 1; |
| process->nlwp = strtol(location, &location, 10); |
| location += 1; |
| for (int i=0; i<17; i++) location = strchr(location, ' ')+1; |
| process->exit_signal = strtol(location, &location, 10); |
| location += 1; |
| assert(location != NULL); |
| process->processor = strtol(location, &location, 10); |
| |
| process->time = lp->utime + lp->stime; |
| |
| return true; |
| } |
| |
| |
| static bool LinuxProcessList_statProcessDir(Process* process, const char* dirname, char* name, time_t curTime) { |
| char filename[MAX_NAME+1]; |
| filename[MAX_NAME] = '\0'; |
| |
| snprintf(filename, MAX_NAME, "%s/%s", dirname, name); |
| struct stat sstat; |
| int statok = stat(filename, &sstat); |
| if (statok == -1) |
| return false; |
| process->st_uid = sstat.st_uid; |
| |
| struct tm date; |
| time_t ctime = sstat.st_ctime; |
| process->starttime_ctime = ctime; |
| (void) localtime_r((time_t*) &ctime, &date); |
| strftime(process->starttime_show, 7, ((ctime > curTime - 86400) ? "%R " : "%b%d "), &date); |
| |
| return true; |
| } |
| |
| #ifdef HAVE_TASKSTATS |
| |
| static void LinuxProcessList_readIoFile(LinuxProcess* process, const char* dirname, char* name, unsigned long long now) { |
| char filename[MAX_NAME+1]; |
| filename[MAX_NAME] = '\0'; |
| |
| snprintf(filename, MAX_NAME, "%s/%s/io", dirname, name); |
| int fd = open(filename, O_RDONLY); |
| if (fd == -1) { |
| process->io_rate_read_bps = -1; |
| process->io_rate_write_bps = -1; |
| return; |
| } |
| |
| char buffer[1024]; |
| ssize_t buflen = xread(fd, buffer, 1023); |
| close(fd); |
| if (buflen < 1) return; |
| buffer[buflen] = '\0'; |
| unsigned long long last_read = process->io_read_bytes; |
| unsigned long long last_write = process->io_write_bytes; |
| char *buf = buffer; |
| char *line = NULL; |
| while ((line = strsep(&buf, "\n")) != NULL) { |
| switch (line[0]) { |
| case 'r': |
| if (line[1] == 'c' && strncmp(line+2, "har: ", 5) == 0) |
| process->io_rchar = strtoull(line+7, NULL, 10); |
| else if (strncmp(line+1, "ead_bytes: ", 11) == 0) { |
| process->io_read_bytes = strtoull(line+12, NULL, 10); |
| process->io_rate_read_bps = |
| ((double)(process->io_read_bytes - last_read))/(((double)(now - process->io_rate_read_time))/1000); |
| process->io_rate_read_time = now; |
| } |
| break; |
| case 'w': |
| if (line[1] == 'c' && strncmp(line+2, "har: ", 5) == 0) |
| process->io_wchar = strtoull(line+7, NULL, 10); |
| else if (strncmp(line+1, "rite_bytes: ", 12) == 0) { |
| process->io_write_bytes = strtoull(line+13, NULL, 10); |
| process->io_rate_write_bps = |
| ((double)(process->io_write_bytes - last_write))/(((double)(now - process->io_rate_write_time))/1000); |
| process->io_rate_write_time = now; |
| } |
| break; |
| case 's': |
| if (line[5] == 'r' && strncmp(line+1, "yscr: ", 6) == 0) |
| process->io_syscr = strtoull(line+7, NULL, 10); |
| else if (strncmp(line+1, "yscw: ", 6) == 0) |
| sscanf(line, "syscw: %32llu", &process->io_syscw); |
| process->io_syscw = strtoull(line+7, NULL, 10); |
| break; |
| case 'c': |
| if (strncmp(line+1, "ancelled_write_bytes: ", 22) == 0) |
| process->io_cancelled_write_bytes = strtoull(line+23, NULL, 10); |
| } |
| } |
| } |
| |
| #endif |
| |
| |
| |
| static bool LinuxProcessList_readStatmFile(LinuxProcess* process, const char* dirname, const char* name) { |
| char filename[MAX_NAME+1]; |
| snprintf(filename, MAX_NAME, "%s/%s/statm", dirname, name); |
| int fd = open(filename, O_RDONLY); |
| if (fd == -1) |
| return false; |
| char buf[256]; |
| ssize_t rres = xread(fd, buf, 255); |
| close(fd); |
| if (rres < 1) return false; |
| |
| char *p = buf; |
| errno = 0; |
| process->super.m_size = strtol(p, &p, 10); if (*p == ' ') p++; |
| process->super.m_resident = strtol(p, &p, 10); if (*p == ' ') p++; |
| process->m_share = strtol(p, &p, 10); if (*p == ' ') p++; |
| process->m_trs = strtol(p, &p, 10); if (*p == ' ') p++; |
| process->m_lrs = strtol(p, &p, 10); if (*p == ' ') p++; |
| process->m_drs = strtol(p, &p, 10); if (*p == ' ') p++; |
| process->m_dt = strtol(p, &p, 10); |
| return (errno == 0); |
| } |
| |
| #ifdef HAVE_OPENVZ |
| |
| static void LinuxProcessList_readOpenVZData(ProcessList* this, Process* process, const char* dirname, const char* name) { |
| if ( (!(this->flags & PROCESS_FLAG_LINUX_OPENVZ)) || (access("/proc/vz", R_OK) != 0)) { |
| process->vpid = process->pid; |
| process->ctid = 0; |
| this->flags |= ~PROCESS_FLAG_LINUX_OPENVZ; |
| return; |
| } |
| char filename[MAX_NAME+1]; |
| snprintf(filename, MAX_NAME, "%s/%s/stat", dirname, name); |
| FILE* file = fopen(filename, "r"); |
| if (!file) |
| return; |
| (void) fscanf(file, |
| "%*32u %*32s %*1c %*32u %*32u %*32u %*32u %*32u %*32u %*32u " |
| "%*32u %*32u %*32u %*32u %*32u %*32u %*32u %*32u " |
| "%*32u %*32u %*32u %*32u %*32u %*32u %*32u %*32u " |
| "%*32u %*32u %*32u %*32u %*32u %*32u %*32u %*32u " |
| "%*32u %*32u %*32u %*32u %*32u %*32u %*32u %*32u " |
| "%*32u %*32u %*32u %*32u %*32u %*32u %*32u " |
| "%*32u %*32u %32u %32u", |
| &process->vpid, &process->ctid); |
| fclose(file); |
| } |
| |
| #endif |
| |
| #ifdef HAVE_CGROUP |
| |
| static void LinuxProcessList_readCGroupFile(LinuxProcess* process, const char* dirname, const char* name) { |
| char filename[MAX_NAME+1]; |
| snprintf(filename, MAX_NAME, "%s/%s/cgroup", dirname, name); |
| FILE* file = fopen(filename, "r"); |
| if (!file) { |
| process->cgroup = strdup(""); |
| return; |
| } |
| char output[256]; |
| output[0] = '\0'; |
| char* at = output; |
| int left = 255; |
| while (!feof(file) && left > 0) { |
| char buffer[256]; |
| char *ok = fgets(buffer, 255, file); |
| if (!ok) break; |
| char* group = strchr(buffer, ':'); |
| if (!group) break; |
| if (at != output) { |
| *at = ';'; |
| at++; |
| left--; |
| } |
| int wrote = snprintf(at, left, "%s", group); |
| left -= wrote; |
| } |
| fclose(file); |
| free(process->cgroup); |
| process->cgroup = strdup(output); |
| } |
| |
| #endif |
| |
| #ifdef HAVE_VSERVER |
| |
| static void LinuxProcessList_readVServerData(LinuxProcess* process, const char* dirname, const char* name) { |
| char filename[MAX_NAME+1]; |
| snprintf(filename, MAX_NAME, "%s/%s/status", dirname, name); |
| FILE* file = fopen(filename, "r"); |
| if (!file) |
| return; |
| char buffer[256]; |
| process->vxid = 0; |
| while (fgets(buffer, 255, file)) { |
| if (String_startsWith(buffer, "VxID:")) { |
| int vxid; |
| int ok = sscanf(buffer, "VxID:\t%32d", &vxid); |
| if (ok >= 1) { |
| process->vxid = vxid; |
| } |
| } |
| #if defined HAVE_ANCIENT_VSERVER |
| else if (String_startsWith(buffer, "s_context:")) { |
| int vxid; |
| int ok = sscanf(buffer, "s_context:\t%32d", &vxid); |
| if (ok >= 1) { |
| process->vxid = vxid; |
| } |
| } |
| #endif |
| } |
| fclose(file); |
| } |
| |
| #endif |
| |
| #ifdef HAVE_OOM |
| |
| static void LinuxProcessList_readOomData(LinuxProcess* process, const char* dirname, const char* name) { |
| char filename[MAX_NAME+1]; |
| snprintf(filename, MAX_NAME, "%s/%s/oom_score", dirname, name); |
| FILE* file = fopen(filename, "r"); |
| if (!file) |
| return; |
| char buffer[256]; |
| if (fgets(buffer, 255, file)) { |
| unsigned int oom; |
| int ok = sscanf(buffer, "%32u", &oom); |
| if (ok >= 1) { |
| process->oom = oom; |
| } |
| } |
| fclose(file); |
| } |
| |
| #endif |
| |
| static bool LinuxProcessList_readCmdlineFile(Process* process, const char* dirname, const char* name) { |
| if (Process_isKernelThread(process)) |
| return true; |
| |
| char filename[MAX_NAME+1]; |
| snprintf(filename, MAX_NAME, "%s/%s/cmdline", dirname, name); |
| int fd = open(filename, O_RDONLY); |
| if (fd == -1) |
| return false; |
| |
| char command[4096+1]; // max cmdline length on Linux |
| int amtRead = xread(fd, command, sizeof(command) - 1); |
| close(fd); |
| int tokenEnd = 0; |
| if (amtRead > 0) { |
| for (int i = 0; i < amtRead; i++) |
| if (command[i] == '\0' || command[i] == '\n') { |
| if (tokenEnd == 0) { |
| tokenEnd = i; |
| } |
| command[i] = ' '; |
| } |
| } |
| if (tokenEnd == 0) { |
| tokenEnd = amtRead; |
| } |
| command[amtRead] = '\0'; |
| free(process->comm); |
| process->comm = strdup(command); |
| process->basenameOffset = tokenEnd; |
| |
| return true; |
| } |
| |
| static bool LinuxProcessList_recurseProcTree(LinuxProcessList* this, const char* dirname, Process* parent, double period, struct timeval tv) { |
| ProcessList* pl = (ProcessList*) this; |
| DIR* dir; |
| struct dirent* entry; |
| Settings* settings = pl->settings; |
| |
| time_t curTime = tv.tv_sec; |
| #ifdef HAVE_TASKSTATS |
| unsigned long long now = tv.tv_sec*1000LL+tv.tv_usec/1000LL; |
| #endif |
| |
| dir = opendir(dirname); |
| if (!dir) return false; |
| int cpus = pl->cpuCount; |
| bool hideKernelThreads = settings->hideKernelThreads; |
| bool hideUserlandThreads = settings->hideUserlandThreads; |
| while ((entry = readdir(dir)) != NULL) { |
| char* name = entry->d_name; |
| |
| // The RedHat kernel hides threads with a dot. |
| // I believe this is non-standard. |
| if ((!settings->hideThreads) && name[0] == '.') { |
| name++; |
| } |
| |
| // Just skip all non-number directories. |
| if (name[0] < '0' || name[0] > '9') { |
| continue; |
| } |
| |
| // filename is a number: process directory |
| int pid = atoi(name); |
| |
| if (parent && pid == parent->pid) |
| continue; |
| |
| if (pid <= 0) |
| continue; |
| |
| bool preExisting = false; |
| Process* proc = ProcessList_getProcess(pl, pid, &preExisting, (Process_new_fn) LinuxProcess_new); |
| proc->tgid = parent ? parent->pid : pid; |
| |
| LinuxProcess* lp = (LinuxProcess*) proc; |
| |
| char subdirname[MAX_NAME+1]; |
| snprintf(subdirname, MAX_NAME, "%s/%s/task", dirname, name); |
| LinuxProcessList_recurseProcTree(this, subdirname, proc, period, tv); |
| |
| #ifdef HAVE_TASKSTATS |
| if (settings->flags & PROCESS_FLAG_IO) |
| LinuxProcessList_readIoFile(lp, dirname, name, now); |
| #endif |
| |
| if (! LinuxProcessList_readStatmFile(lp, dirname, name)) |
| goto errorReadingProcess; |
| |
| proc->show = ! ((hideKernelThreads && Process_isKernelThread(proc)) || (hideUserlandThreads && Process_isUserlandThread(proc))); |
| |
| char command[MAX_NAME+1]; |
| unsigned long long int lasttimes = (lp->utime + lp->stime); |
| if (! LinuxProcessList_readStatFile(proc, dirname, name, command)) |
| goto errorReadingProcess; |
| if (settings->flags & PROCESS_FLAG_LINUX_IOPRIO) |
| LinuxProcess_updateIOPriority(lp); |
| float percent_cpu = (lp->utime + lp->stime - lasttimes) / period * 100.0; |
| proc->percent_cpu = MAX(MIN(percent_cpu, cpus*100.0), 0.0); |
| if (isnan(proc->percent_cpu)) proc->percent_cpu = 0.0; |
| proc->percent_mem = (proc->m_resident * PAGE_SIZE_KB) / (double)(pl->totalMem) * 100.0; |
| |
| if(!preExisting) { |
| |
| if (! LinuxProcessList_statProcessDir(proc, dirname, name, curTime)) |
| goto errorReadingProcess; |
| |
| proc->user = UsersTable_getRef(pl->usersTable, proc->st_uid); |
| |
| #ifdef HAVE_OPENVZ |
| LinuxProcessList_readOpenVZData(this, lp, dirname, name); |
| #endif |
| |
| #ifdef HAVE_VSERVER |
| if (settings->flags & PROCESS_FLAG_LINUX_VSERVER) |
| LinuxProcessList_readVServerData(lp, dirname, name); |
| #endif |
| |
| if (! LinuxProcessList_readCmdlineFile(proc, dirname, name)) |
| goto errorReadingProcess; |
| |
| ProcessList_add(pl, proc); |
| } else { |
| if (settings->updateProcessNames) { |
| if (! LinuxProcessList_readCmdlineFile(proc, dirname, name)) |
| goto errorReadingProcess; |
| } |
| } |
| |
| #ifdef HAVE_CGROUP |
| if (settings->flags & PROCESS_FLAG_LINUX_CGROUP) |
| LinuxProcessList_readCGroupFile(lp, dirname, name); |
| #endif |
| |
| #ifdef HAVE_OOM |
| LinuxProcessList_readOomData(lp, dirname, name); |
| #endif |
| |
| if (proc->state == 'Z') { |
| free(proc->comm); |
| proc->basenameOffset = -1; |
| proc->comm = strdup(command); |
| } else if (Process_isThread(proc)) { |
| if (settings->showThreadNames || Process_isKernelThread(proc) || proc->state == 'Z') { |
| free(proc->comm); |
| proc->basenameOffset = -1; |
| proc->comm = strdup(command); |
| } else if (settings->showThreadNames) { |
| if (! LinuxProcessList_readCmdlineFile(proc, dirname, name)) |
| goto errorReadingProcess; |
| } |
| if (Process_isKernelThread(proc)) { |
| pl->kernelThreads++; |
| } else { |
| pl->userlandThreads++; |
| } |
| } |
| |
| pl->totalTasks++; |
| if (proc->state == 'R') |
| pl->runningTasks++; |
| proc->updated = true; |
| continue; |
| |
| // Exception handler. |
| errorReadingProcess: { |
| if (preExisting) { |
| ProcessList_remove(pl, proc); |
| } else { |
| Process_delete((Object*)proc); |
| } |
| } |
| } |
| closedir(dir); |
| return true; |
| } |
| |
| static inline void LinuxProcessList_scanMemoryInfo(ProcessList* this) { |
| unsigned long long int swapFree = 0; |
| |
| FILE* file = fopen(PROCMEMINFOFILE, "r"); |
| if (file == NULL) { |
| CRT_fatalError("Cannot open " PROCMEMINFOFILE); |
| } |
| char buffer[128]; |
| while (fgets(buffer, 128, file)) { |
| |
| switch (buffer[0]) { |
| case 'M': |
| if (String_startsWith(buffer, "MemTotal:")) |
| sscanf(buffer, "MemTotal: %32llu kB", &this->totalMem); |
| else if (String_startsWith(buffer, "MemFree:")) |
| sscanf(buffer, "MemFree: %32llu kB", &this->freeMem); |
| else if (String_startsWith(buffer, "MemShared:")) |
| sscanf(buffer, "MemShared: %32llu kB", &this->sharedMem); |
| break; |
| case 'B': |
| if (String_startsWith(buffer, "Buffers:")) |
| sscanf(buffer, "Buffers: %32llu kB", &this->buffersMem); |
| break; |
| case 'C': |
| if (String_startsWith(buffer, "Cached:")) |
| sscanf(buffer, "Cached: %32llu kB", &this->cachedMem); |
| break; |
| case 'S': |
| if (String_startsWith(buffer, "SwapTotal:")) |
| sscanf(buffer, "SwapTotal: %32llu kB", &this->totalSwap); |
| if (String_startsWith(buffer, "SwapFree:")) |
| sscanf(buffer, "SwapFree: %32llu kB", &swapFree); |
| break; |
| } |
| } |
| |
| this->usedMem = this->totalMem - this->freeMem; |
| this->usedSwap = this->totalSwap - swapFree; |
| fclose(file); |
| } |
| |
| static inline double LinuxProcessList_scanCPUTime(LinuxProcessList* this) { |
| unsigned long long int usertime, nicetime, systemtime, idletime; |
| |
| FILE* file = fopen(PROCSTATFILE, "r"); |
| if (file == NULL) { |
| CRT_fatalError("Cannot open " PROCSTATFILE); |
| } |
| int cpus = this->super.cpuCount; |
| assert(cpus > 0); |
| for (int i = 0; i <= cpus; i++) { |
| char buffer[256]; |
| int cpuid; |
| unsigned long long int ioWait, irq, softIrq, steal, guest, guestnice; |
| unsigned long long int systemalltime, idlealltime, totaltime, virtalltime; |
| ioWait = irq = softIrq = steal = guest = guestnice = 0; |
| // Dependending on your kernel version, |
| // 5, 7, 8 or 9 of these fields will be set. |
| // The rest will remain at zero. |
| char* ok = fgets(buffer, 255, file); |
| if (!ok) buffer[0] = '\0'; |
| if (i == 0) |
| sscanf(buffer, "cpu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu", &usertime, &nicetime, &systemtime, &idletime, &ioWait, &irq, &softIrq, &steal, &guest, &guestnice); |
| else { |
| sscanf(buffer, "cpu%4d %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu", &cpuid, &usertime, &nicetime, &systemtime, &idletime, &ioWait, &irq, &softIrq, &steal, &guest, &guestnice); |
| assert(cpuid == i - 1); |
| } |
| // Guest time is already accounted in usertime |
| usertime = usertime - guest; |
| nicetime = nicetime - guestnice; |
| // Fields existing on kernels >= 2.6 |
| // (and RHEL's patched kernel 2.4...) |
| idlealltime = idletime + ioWait; |
| systemalltime = systemtime + irq + softIrq; |
| virtalltime = guest + guestnice; |
| totaltime = usertime + nicetime + systemalltime + idlealltime + steal + virtalltime; |
| CPUData* cpuData = &(this->cpus[i]); |
| assert (usertime >= cpuData->userTime); |
| assert (nicetime >= cpuData->niceTime); |
| assert (systemtime >= cpuData->systemTime); |
| assert (idletime >= cpuData->idleTime); |
| assert (totaltime >= cpuData->totalTime); |
| assert (systemalltime >= cpuData->systemAllTime); |
| assert (idlealltime >= cpuData->idleAllTime); |
| assert (ioWait >= cpuData->ioWaitTime); |
| assert (irq >= cpuData->irqTime); |
| assert (softIrq >= cpuData->softIrqTime); |
| assert (steal >= cpuData->stealTime); |
| assert (virtalltime >= cpuData->guestTime); |
| cpuData->userPeriod = usertime - cpuData->userTime; |
| cpuData->nicePeriod = nicetime - cpuData->niceTime; |
| cpuData->systemPeriod = systemtime - cpuData->systemTime; |
| cpuData->systemAllPeriod = systemalltime - cpuData->systemAllTime; |
| cpuData->idleAllPeriod = idlealltime - cpuData->idleAllTime; |
| cpuData->idlePeriod = idletime - cpuData->idleTime; |
| cpuData->ioWaitPeriod = ioWait - cpuData->ioWaitTime; |
| cpuData->irqPeriod = irq - cpuData->irqTime; |
| cpuData->softIrqPeriod = softIrq - cpuData->softIrqTime; |
| cpuData->stealPeriod = steal - cpuData->stealTime; |
| cpuData->guestPeriod = virtalltime - cpuData->guestTime; |
| cpuData->totalPeriod = totaltime - cpuData->totalTime; |
| cpuData->userTime = usertime; |
| cpuData->niceTime = nicetime; |
| cpuData->systemTime = systemtime; |
| cpuData->systemAllTime = systemalltime; |
| cpuData->idleAllTime = idlealltime; |
| cpuData->idleTime = idletime; |
| cpuData->ioWaitTime = ioWait; |
| cpuData->irqTime = irq; |
| cpuData->softIrqTime = softIrq; |
| cpuData->stealTime = steal; |
| cpuData->guestTime = virtalltime; |
| cpuData->totalTime = totaltime; |
| } |
| double period = (double)this->cpus[0].totalPeriod / cpus; fclose(file); |
| return period; |
| } |
| |
| void ProcessList_goThroughEntries(ProcessList* super) { |
| LinuxProcessList* this = (LinuxProcessList*) super; |
| |
| LinuxProcessList_scanMemoryInfo(super); |
| double period = LinuxProcessList_scanCPUTime(this); |
| |
| struct timeval tv; |
| gettimeofday(&tv, NULL); |
| LinuxProcessList_recurseProcTree(this, PROCDIR, NULL, period, tv); |
| } |