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#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include "global.h"
#include "procstat.h"
#include "devnames.h"
static ProcStats ps;
int use_proc_diskstats;
void pstat_init(struct pstat *pst, long nslice, float update_interval) {
pst->nslice = nslice;
ALLOC_VEC(pst->slices, nslice);
pst->cur_slice = 0;
pst->total = 0;
pst->update_interval = update_interval;
}
float pstat_current(struct pstat *pst) {
long idx = pst->cur_slice ? pst->cur_slice-1 : pst->nslice-1;
return pst->slices[idx]/pst->update_interval;
}
void pstat_add(struct pstat *pst, unsigned long v) {
pst->slices[pst->cur_slice] += v;
}
void pstat_advance(struct pstat *pst) {
unsigned long v = pst->slices[pst->cur_slice];
if (pst->total)
pst->slices[pst->cur_slice] -= pst->total;
else pst->slices[pst->cur_slice] = 0;
pst->total = v;
if (++pst->cur_slice >= pst->nslice) pst->cur_slice = 0;
pst->slices[pst->cur_slice] = 0;
}
float pstat_meanval(struct pstat *pst) {
unsigned long sum = 0;
int i;
for (i = 0; i < pst->nslice; ++i) sum += pst->slices[i];
return sum / pst->update_interval / (pst->nslice-1);
}
float get_read_throughput() {
return pstat_current(&ps.disk_read) / 2048.; /* 2048 because we log sector counts */
}
float get_write_throughput() {
return pstat_current(&ps.disk_write) / 2048.;
}
float get_swapin_throughput() {
return pstat_current(&ps.swap_in) / 2048.;
}
float get_swapout_throughput() {
return pstat_current(&ps.swap_out) / 2048.;
}
float get_read_mean_throughput() {
return pstat_meanval(&ps.disk_read) / 2048.;
}
float get_write_mean_throughput() {
return pstat_meanval(&ps.disk_write) / 2048.;
}
void update_stats() {
FILE *f;
char line[1024];
char hdname[200];
int readok = 0;
const char *proc_fname;
if (!use_proc_diskstats) proc_fname = "/proc/partitions";
else proc_fname = "/proc/diskstats";
f = fopen(proc_fname, "r");
if (!f) { perror(proc_fname); return; }
while (fgets(line, sizeof(line), f)) {
int major, minor;
unsigned long nr, nw;
const char *fmt = use_proc_diskstats ?
"%d %d %200s %*d %*d %lu %*d %*d %*d %lu" :
"%d %d %*u %200s %*d %*d %lu %*d %*d %*d %lu";
if (sscanf(line, fmt, &major, &minor, hdname, &nr, &nw) == 5 ||
(use_proc_diskstats && is_partition(major,minor) &&
/* .. kernel 2.5 uses a different format for partitions and disc */
sscanf(line, "%d %d %200s %*d %lu %*d %lu", &major, &minor, hdname, &nr, &nw) == 5)) {
DiskList *dl;
if (readok == 0) readok = 1;
if ((dl=find_dev(major,minor))) {
dl->touched_r = (dl->nr - nr) ? 10 : dl->touched_r;
dl->touched_w = (dl->nw - nw) ? 10 : dl->touched_w;
dl->nr = nr; dl->nw = nw;
if (is_displayed(dl->hd_id,dl->part_id) &&
((dl->part_id && (!find_id(dl->hd_id, 0) || !is_displayed(dl->hd_id, 0))) || /* partition without host disk */
(dl->part_id == 0))) /* disk */
{
if (!Prefs.debug_disk_rd) {
pstat_add(&ps.disk_read, nr);
} else {
static long cntr = 0; cntr+=(rand()%30) == 0 ? Prefs.debug_disk_rd : 0;
pstat_add(&ps.disk_read, nr + cntr);
}
if (!Prefs.debug_disk_wr) {
pstat_add(&ps.disk_write, nw);
} else {
static long cntw = 0; cntw+=(rand()%30) == 0 ? Prefs.debug_disk_wr : 0;
pstat_add(&ps.disk_write, nw + cntw);
}
readok = 2;
}
}
/* if (in_our_disk || find_dev(major,minor))*/ {
strlist *sl;
for (sl = swap_list(); sl; sl=sl->next) {
if (strcmp(stripdev(hdname), stripdev(sl->s)) == 0) {
if (!Prefs.debug_swapio) {
pstat_add(&ps.swap_in, nr);
pstat_add(&ps.swap_out, nw);
} else {
static long cnt = 0; cnt+=Prefs.debug_swapio;
pstat_add(&ps.swap_in, nr + cnt);
pstat_add(&ps.swap_out, nw + cnt);
}
}
}
}
}
}
fclose(f);
pstat_advance(&ps.disk_read);pstat_advance(&ps.disk_write);
pstat_advance(&ps.swap_in);pstat_advance(&ps.swap_out);
if (readok == 0) { fprintf(stderr, "warning: could not find any info in %s (kernel too old?)\n", proc_fname); exit(1); }
else if (readok == 1) { ONLY_ONCE(fprintf(stderr, "warning: could not find any monitored disc in %s\n", proc_fname)); }
BLAHBLAH(1,printf("swap: %5.2f,%5.2f disc: %5.2f,%5.2f MB/s\n",
get_swapin_throughput(), get_swapout_throughput(),
get_read_throughput(), get_write_throughput()));
}
void init_stats(float update_interval) {
char s[512];
FILE *f;
pstat_init(&ps.swap_in, (long)(0.5/update_interval)+1, update_interval);
pstat_init(&ps.swap_out, (long)(0.5/update_interval)+1, update_interval);
pstat_init(&ps.disk_read, (long)(0.5/update_interval)+1, update_interval);
pstat_init(&ps.disk_write, (long)(0.5/update_interval)+1, update_interval);
f = fopen("/proc/swaps","r");
//if (!f) { perror("/proc/swaps"); exit(1); }
if (f) {
while (fgets(s, 512, f)) {
char *s2 = strchr(s,' ');
if (s2 && s2 != s && strncmp(s, "/dev/", 5) == 0) {
*s2 = 0;
add_swap(s);
BLAHBLAH(1,printf("found swap partition: %s\n", swap_list()->s));
}
}
fclose(f);
}
if (!swap_list()) {
fprintf(stderr, "Warning: no swap partition found in /proc/swaps !!\n");
}
if ((f=fopen("/proc/diskstats","r"))) {
use_proc_diskstats = 1; fclose(f);
}
else { use_proc_diskstats = 0; }
BLAHBLAH(1,printf("using %s for disc statistics\n", use_proc_diskstats ? "/proc/diskstats" : "/proc/partitions"));
}
/* hello I am brain-dead */
void scan_all_hd(int add_partitions) {
char s[512];
FILE *f = NULL;
/* find mounted partitions */
if (add_partitions && (f = fopen("/etc/mtab","r"))) {
while (fgets(s,512,f)) {
char partname[512], mountpoint[512];
mountpoint[0] = 0;
if (sscanf(s,"%500s %500s", partname, mountpoint)>=1) {
char *p = strchr(mountpoint, '/');
//printf("add_device_by_name(%s, %s)\n", partname, p);
add_device_by_name(partname, p);
}
}
}
if (f) fclose(f);
/* second try .. look for hard drives listed in proc/partitions (and only hard-drives .. their partitions
are supposed to be listed in mtab) */
if ((f = fopen("/proc/partitions","r"))) {
while (fgets(s,512,f)) {
unsigned major, minor;
char name[512]; name[0] = 0;
if (sscanf(s,"%d %d %*d %500s", &major, &minor, name)==3) {
int hd_id, part_id;
/* on n'ajoute que les disques dont au moins une partoche etait dans mtab */
if (device_info(major,minor,NULL,&hd_id,&part_id) != 0 && part_id == 0 && find_id(hd_id,-1)) {
add_device_by_id(major,minor,NULL);
}
}
}
}
if (f) fclose(f);
/* for (c = 'a'; c <= 'z'; ++c) {
snprintf(s,512,"/proc/ide/hd%c/media",c);
if ((f = fopen(s,"r")) && fgets(s, 512, f) && strcmp(s, "disk\n")==0) {
snprintf(s, 512, "/dev/hd%c",c);
add_device(s, NULL);
}
if (f) fclose(f);
}*/
}
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