/**
* Fill data in the process tree by recusively walking through it
* @param pt process tree
* @param i process index
* @return TRUE if succeeded otherwise FALSE.
*/
void fillprocesstree(ProcessTree_T *pt, int index) {
int i;
ProcessTree_T *parent_pt;
ASSERT(pt);
if (pt[index].visited == 1)
return;
pt[index].visited = 1;
pt[index].children_sum = pt[index].children_num;
pt[index].mem_kbyte_sum = pt[index].mem_kbyte;
pt[index].cpu_percent_sum = pt[index].cpu_percent;
for (i = 0; i < pt[index].children_num; i++)
fillprocesstree(pt, pt[index].children[i]);
if (pt[index].parent != -1 && pt[index].parent != index) {
parent_pt = &pt[pt[index].parent];
parent_pt->children_sum += pt[index].children_sum;
parent_pt->mem_kbyte_sum += pt[index].mem_kbyte_sum;
parent_pt->cpu_percent_sum += pt[index].cpu_percent_sum;
parent_pt->cpu_percent_sum = (pt[index].cpu_percent_sum > 1000) ? 1000 : parent_pt->cpu_percent_sum;
}
}
/**
* Initialize the process tree
* @return treesize >= 0 if succeeded otherwise < 0
*/
int initprocesstree(ProcessTree_T **pt_r, int *size_r, ProcessTree_T **oldpt_r, int *oldsize_r) {
int i;
int oldentry;
ProcessTree_T *pt;
ProcessTree_T *oldpt;
int root = -1;
if (*pt_r != NULL) {
if (oldpt_r && *oldpt_r != NULL)
delprocesstree(oldpt_r, oldsize_r);
*oldpt_r = *pt_r;
*oldsize_r = *size_r;
}
if ((*size_r = initprocesstree_sysdep(pt_r)) <= 0) {
DEBUG("system statistic error -- cannot initialize the process tree => process resource monitoring disabled\n");
Run.doprocess = FALSE;
return -1;
} else if (Run.doprocess == FALSE) {
DEBUG("system statistic -- initialization of the process tree succeeded => process resource monitoring enabled\n");
Run.doprocess = TRUE;
}
pt = *pt_r;
oldpt = *oldpt_r;
if (pt == NULL)
return 0;
for (i = 0; i < (volatile int)*size_r; i ++) {
if (oldpt && ((oldentry = findprocess(pt[i].pid, oldpt, *oldsize_r)) != -1)) {
pt[i].cputime_prev = oldpt[oldentry].cputime;
pt[i].time_prev = oldpt[oldentry].time;
/* The cpu_percent may be set already (for example by HPUX module) */
if (pt[i].cpu_percent == 0 && pt[i].cputime_prev != 0 && pt[i].cputime != 0 && pt[i].cputime > pt[i].cputime_prev) {
pt[i].cpu_percent = (int)((1000 * (double)(pt[i].cputime - pt[i].cputime_prev) / (pt[i].time - pt[i].time_prev)) / systeminfo.cpus);
if (pt[i].cpu_percent > 1000 / systeminfo.cpus)
pt[i].cpu_percent = 1000 / systeminfo.cpus;
}
} else {
pt[i].cputime_prev = 0;
pt[i].time_prev = 0.0;
pt[i].cpu_percent = 0;
}
if (pt[i].pid == pt[i].ppid) {
pt[i].parent = i;
continue;
}
if ((pt[i].parent = findprocess(pt[i].ppid, pt, *size_r)) == -1) {
/* Parent process wasn't found - on Linux this is normal: main process with PID 0 is not listed, similarly in FreeBSD jail.
* We create virtual process entry for missing parent so we can have full tree-like structure with root. */
int j = (*size_r)++;
pt = *pt_r = xresize(*pt_r, *size_r * sizeof(ProcessTree_T));
memset(&pt[j], 0, sizeof(ProcessTree_T));
pt[j].ppid = pt[j].pid = pt[i].ppid;
pt[i].parent = j;
}
if (! connectchild(pt, pt[i].parent, i)) {
/* connection to parent process has failed, this is usually caused in the part above */
DEBUG("system statistic error -- cannot connect process id %d to its parent %d\n", pt[i].pid, pt[i].ppid);
pt[i].pid = 0;
continue;
}
}
/* The main process in Solaris zones and FreeBSD host doesn't have pid 1, so try to find process which is parent of itself */
for (i = 0; i < *size_r; i++) {
if (pt[i].pid == pt[i].ppid) {
root = i;
break;
}
}
if (root == -1) {
DEBUG("system statistic error -- cannot find root process id\n");
return -1;
}
fillprocesstree(pt, root);
update_system_load(*pt_r, *size_r);
return *size_r;
}
