procps/vmstat.c

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21 KiB
C
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// old: "Copyright 1994 by Henry Ware <al172@yfn.ysu.edu>. Copyleft same year."
// most code copyright 2002 Albert Cahalan
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//
// 27/05/2003 (Fabian Frederick) : Add unit conversion + interface
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// Export proc/stat access to libproc
// Adapt vmstat helpfile
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// 31/05/2003 (Fabian) : Add diskstat support (/libproc)
// June 2003 (Fabian) : -S <x> -s & -s -S <x> patch
// June 2003 (Fabian) : -Adding diskstat against 3.1.9, slabinfo
// -patching 'header' in disk & slab
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// July 2003 (Fabian) : -Adding disk partition output
// -Adding disk table
// -Syncing help / usage
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#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <assert.h>
#include <fcntl.h>
#include <limits.h>
#include <termios.h>
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#include <unistd.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/dir.h>
#include <dirent.h>
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#include "proc/sysinfo.h"
#include "proc/version.h"
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#define UNIT_B 1
#define UNIT_k 1000
#define UNIT_K 1024
#define UNIT_m 1000000
#define UNIT_M 1048576
static unsigned long dataUnit=UNIT_K;
static char szDataUnit[3] = "K";
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#define VMSTAT 0
#define DISKSTAT 0x00000001
#define VMSUMSTAT 0x00000002
#define SLABSTAT 0x00000004
#define PARTITIONSTAT 0x00000008
#define DISKSUMSTAT 0x00000010
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static int statMode=VMSTAT;
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#define FALSE 0
#define TRUE 1
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static int a_option; /* "-a" means "show active/inactive" */
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static unsigned sleep_time = 1;
static unsigned long num_updates;
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static unsigned int height; // window height
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static unsigned int moreheaders=TRUE;
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/////////////////////////////////////////////////////////////////////////
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static void usage(void) NORETURN;
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static void usage(void) {
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fprintf(stderr,"usage: vmstat [-V] [-n] [delay [count]]\n");
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fprintf(stderr," -V prints version.\n");
fprintf(stderr," -n causes the headers not to be reprinted regularly.\n");
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fprintf(stderr," -a print inactive/active page stats.\n");
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fprintf(stderr," -d prints disk statistics\n");
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fprintf(stderr," -D prints disk table\n");
fprintf(stderr," -p prints disk partition statistics\n");
fprintf(stderr," -s prints vm table\n");
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fprintf(stderr," -m prints slabinfo\n");
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fprintf(stderr," -S unit size\n");
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fprintf(stderr," delay is the delay between updates in seconds. \n");
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fprintf(stderr," unit size k:1000 K:1024 m:1000000 M:1048576 (default is K)\n");
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fprintf(stderr," count is the number of updates.\n");
exit(EXIT_FAILURE);
}
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/////////////////////////////////////////////////////////////////////////////
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#if 0
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// produce: " 6 ", "123 ", "123k ", etc.
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static int format_1024(unsigned long long val64, char *restrict dst){
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unsigned oldval;
const char suffix[] = " kmgtpe";
unsigned level = 0;
unsigned val32;
if(val64 < 1000){ // special case to avoid "6.0 " when plain " 6 " would do
val32 = val64;
return sprintf(dst,"%3u ",val32);
}
while(val64 > 0xffffffffull){
level++;
val64 /= 1024;
}
val32 = val64;
while(val32 > 999){
level++;
oldval = val32;
val32 /= 1024;
}
if(val32 < 10){
unsigned fract = (oldval % 1024) * 10 / 1024;
return sprintf(dst, "%u.%u%c ", val32, fract, suffix[level]);
}
return sprintf(dst, "%3u%c ", val32, suffix[level]);
}
// produce: " 6 ", "123 ", "123k ", etc.
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static int format_1000(unsigned long long val64, char *restrict dst){
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unsigned oldval;
const char suffix[] = " kmgtpe";
unsigned level = 0;
unsigned val32;
if(val64 < 1000){ // special case to avoid "6.0 " when plain " 6 " would do
val32 = val64;
return sprintf(dst,"%3u ",val32);
}
while(val64 > 0xffffffffull){
level++;
val64 /= 1000;
}
val32 = val64;
while(val32 > 999){
level++;
oldval = val32;
val32 /= 1000;
}
if(val32 < 10){
unsigned fract = (oldval % 1000) / 100;
return sprintf(dst, "%u.%u%c ", val32, fract, suffix[level]);
}
return sprintf(dst, "%3u%c ", val32, suffix[level]);
}
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#endif
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////////////////////////////////////////////////////////////////////////////
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static void new_header(void){
printf("procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----\n");
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printf(
"%2s %2s %6s %6s %6s %6s %4s %4s %5s %5s %4s %4s %2s %2s %2s %2s\n",
"r","b",
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"swpd", "free", a_option?"inact":"buff", a_option?"active":"cache",
"si","so",
"bi","bo",
"in","cs",
"us","sy","id","wa"
);
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}
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////////////////////////////////////////////////////////////////////////////
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static unsigned long unitConvert(unsigned int size){
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float cvSize;
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cvSize=(float)size/dataUnit*((statMode==SLABSTAT)?1:1024);
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return ((unsigned long) cvSize);
}
////////////////////////////////////////////////////////////////////////////
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static void new_format(void) {
const char format[]="%2u %2u %6lu %6lu %6lu %6lu %4u %4u %5u %5u %4u %4u %2u %2u %2u %2u\n";
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unsigned int tog=0; /* toggle switch for cleaner code */
unsigned int i;
unsigned int hz = Hertz;
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unsigned int running,blocked,dummy_1,dummy_2;
jiff cpu_use[2], cpu_nic[2], cpu_sys[2], cpu_idl[2], cpu_iow[2], cpu_xxx[2], cpu_yyy[2], cpu_zzz[2];
jiff duse, dsys, didl, diow, dstl, Div, divo2;
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unsigned long pgpgin[2], pgpgout[2], pswpin[2], pswpout[2];
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unsigned int intr[2], ctxt[2];
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unsigned int sleep_half;
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unsigned long kb_per_page = sysconf(_SC_PAGESIZE) / 1024ul;
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int debt = 0; // handle idle ticks running backwards
sleep_half=(sleep_time/2);
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new_header();
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meminfo();
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getstat(cpu_use,cpu_nic,cpu_sys,cpu_idl,cpu_iow,cpu_xxx,cpu_yyy,cpu_zzz,
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pgpgin,pgpgout,pswpin,pswpout,
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intr,ctxt,
&running,&blocked,
&dummy_1, &dummy_2);
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duse= *cpu_use + *cpu_nic;
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dsys= *cpu_sys + *cpu_xxx + *cpu_yyy;
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didl= *cpu_idl;
diow= *cpu_iow;
dstl= *cpu_zzz;
Div= duse+dsys+didl+diow+dstl;
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divo2= Div/2UL;
printf(format,
running, blocked,
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unitConvert(kb_swap_used), unitConvert(kb_main_free),
unitConvert(a_option?kb_inactive:kb_main_buffers),
unitConvert(a_option?kb_active:kb_main_cached),
(unsigned)( (*pswpin * unitConvert(kb_per_page) * hz + divo2) / Div ),
(unsigned)( (*pswpout * unitConvert(kb_per_page) * hz + divo2) / Div ),
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(unsigned)( (*pgpgin * hz + divo2) / Div ),
(unsigned)( (*pgpgout * hz + divo2) / Div ),
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(unsigned)( (*intr * hz + divo2) / Div ),
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(unsigned)( (*ctxt * hz + divo2) / Div ),
(unsigned)( (100*duse + divo2) / Div ),
(unsigned)( (100*dsys + divo2) / Div ),
(unsigned)( (100*didl + divo2) / Div ),
(unsigned)( (100*diow + divo2) / Div ) /* ,
(unsigned)( (100*dstl + divo2) / Div ) */
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);
for(i=1;i<num_updates;i++) { /* \\\\\\\\\\\\\\\\\\\\ main loop ////////////////// */
sleep(sleep_time);
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if (moreheaders && ((i%height)==0)) new_header();
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tog= !tog;
meminfo();
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getstat(cpu_use+tog,cpu_nic+tog,cpu_sys+tog,cpu_idl+tog,cpu_iow+tog,cpu_xxx+tog,cpu_yyy+tog,cpu_zzz+tog,
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pgpgin+tog,pgpgout+tog,pswpin+tog,pswpout+tog,
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intr+tog,ctxt+tog,
&running,&blocked,
&dummy_1,&dummy_2);
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duse= cpu_use[tog]-cpu_use[!tog] + cpu_nic[tog]-cpu_nic[!tog];
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dsys= cpu_sys[tog]-cpu_sys[!tog] + cpu_xxx[tog]-cpu_xxx[!tog] + cpu_yyy[tog]-cpu_yyy[!tog];
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didl= cpu_idl[tog]-cpu_idl[!tog];
diow= cpu_iow[tog]-cpu_iow[!tog];
dstl= cpu_zzz[tog]-cpu_zzz[!tog];
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/* idle can run backwards for a moment -- kernel "feature" */
if(debt){
didl = (int)didl + debt;
debt = 0;
}
if( (int)didl < 0 ){
debt = (int)didl;
didl = 0;
}
Div= duse+dsys+didl+diow+dstl;
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divo2= Div/2UL;
printf(format,
running, blocked,
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unitConvert(kb_swap_used),unitConvert(kb_main_free),
unitConvert(a_option?kb_inactive:kb_main_buffers),
unitConvert(a_option?kb_active:kb_main_cached),
(unsigned)( ( (pswpin [tog] - pswpin [!tog])*unitConvert(kb_per_page)+sleep_half )/sleep_time ), /*si*/
(unsigned)( ( (pswpout[tog] - pswpout[!tog])*unitConvert(kb_per_page)+sleep_half )/sleep_time ), /*so*/
(unsigned)( ( pgpgin [tog] - pgpgin [!tog] +sleep_half )/sleep_time ), /*bi*/
(unsigned)( ( pgpgout[tog] - pgpgout[!tog] +sleep_half )/sleep_time ), /*bo*/
(unsigned)( ( intr [tog] - intr [!tog] +sleep_half )/sleep_time ), /*in*/
(unsigned)( ( ctxt [tog] - ctxt [!tog] +sleep_half )/sleep_time ), /*cs*/
(unsigned)( (100*duse+divo2)/Div ), /*us*/
(unsigned)( (100*dsys+divo2)/Div ), /*sy*/
(unsigned)( (100*didl+divo2)/Div ), /*id*/
(unsigned)( (100*diow+divo2)/Div )/*, //wa
(unsigned)( (100*dstl+divo2)/Div ) //st */
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);
}
}
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////////////////////////////////////////////////////////////////////////////
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static void diskpartition_header(const char *partition_name){
printf("%-10s %10s %10s %10s %10s\n",partition_name, "reads ", "read sectors", "writes ", "requested writes");
}
////////////////////////////////////////////////////////////////////////////
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static int diskpartition_format(const char* partition_name){
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FILE *fDiskstat;
struct disk_stat *disks;
struct partition_stat *partitions, *current_partition=NULL;
unsigned long ndisks, j, k, npartitions;
const char format[] = "%20u %10llu %10u %10u\n";
fDiskstat=fopen("/proc/diskstats","rb");
if(!fDiskstat){
fprintf(stderr, "Your kernel doesn't support diskstat. (2.5.70 or above required)\n");
exit(EXIT_FAILURE);
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}
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fclose(fDiskstat);
ndisks=getdiskstat(&disks,&partitions);
npartitions=getpartitions_num(disks, ndisks);
for(k=0; k<npartitions; k++){
if(!strcmp(partition_name, partitions[k].partition_name)){
current_partition=&(partitions[k]);
}
}
if(!current_partition){
return -1;
}
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diskpartition_header(partition_name);
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printf (format,
current_partition->reads,current_partition->reads_sectors,current_partition->writes,current_partition->requested_writes);
fflush(stdout);
free(disks);
free(partitions);
for(j=1; j<num_updates; j++){
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if (moreheaders && ((j%height)==0)) diskpartition_header(partition_name);
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sleep(sleep_time);
ndisks=getdiskstat(&disks,&partitions);
npartitions=getpartitions_num(disks, ndisks);
current_partition=NULL;
for(k=0; k<npartitions; k++){
if(!strcmp(partition_name, partitions[k].partition_name)){
current_partition=&(partitions[k]);
}
}
if(!current_partition){
return -1;
}
printf (format,
current_partition->reads,current_partition->reads_sectors,current_partition->writes,current_partition->requested_writes);
fflush(stdout);
free(disks);
free(partitions);
}
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return 0;
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}
////////////////////////////////////////////////////////////////////////////
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static void diskheader(void){
printf("disk- ------------reads------------ ------------writes----------- -----IO------\n");
printf("%5s %6s %6s %7s %7s %6s %6s %7s %7s %6s %6s\n",
" ", "total", "merged","sectors","ms","total","merged","sectors","ms","cur","sec");
}
////////////////////////////////////////////////////////////////////////////
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static void diskformat(void){
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FILE *fDiskstat;
struct disk_stat *disks;
struct partition_stat *partitions;
unsigned long ndisks,i,j,k;
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const char format[]="%-5s %6u %6u %7llu %7u %6u %6u %7llu %7u %6u %6u\n";
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if ((fDiskstat=fopen("/proc/diskstats", "rb"))){
fclose(fDiskstat);
ndisks=getdiskstat(&disks,&partitions);
if (!moreheaders) diskheader();
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for(k=0; k<ndisks; k++){
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if (moreheaders && ((k%height)==0)) diskheader();
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printf(format,
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disks[k].disk_name,
disks[k].reads,
disks[k].merged_reads,
disks[k].reads_sectors,
disks[k].milli_reading,
disks[k].writes,
disks[k].merged_writes,
disks[k].written_sectors,
disks[k].milli_writing,
disks[k].inprogress_IO?disks[k].inprogress_IO/1000:0,
disks[k].milli_spent_IO?disks[k].milli_spent_IO/1000:0/*,
disks[i].weighted_milli_spent_IO/1000*/
);
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fflush(stdout);
}
free(disks);
free(partitions);
for(j=1; j<num_updates; j++){
sleep(sleep_time);
ndisks=getdiskstat(&disks,&partitions);
for(i=0; i<ndisks; i++,k++){
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if (moreheaders && ((k%height)==0)) diskheader();
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printf(format,
disks[i].disk_name,
disks[i].reads,
disks[i].merged_reads,
disks[i].reads_sectors,
disks[i].milli_reading,
disks[i].writes,
disks[i].merged_writes,
disks[i].written_sectors,
disks[i].milli_writing,
disks[i].inprogress_IO?disks[i].inprogress_IO/1000:0,
disks[i].milli_spent_IO?disks[i].milli_spent_IO/1000:0/*,
disks[i].weighted_milli_spent_IO/1000*/
);
fflush(stdout);
}
free(disks);
free(partitions);
}
}else{
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fprintf(stderr, "Your kernel doesn't support diskstat (2.5.70 or above required)\n");
exit(EXIT_FAILURE);
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}
}
////////////////////////////////////////////////////////////////////////////
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static void slabheader(void){
printf("%-24s %6s %6s %6s %6s\n","Cache","Num", "Total", "Size", "Pages");
}
////////////////////////////////////////////////////////////////////////////
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static void slabformat (void){
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FILE *fSlab;
struct slab_cache *slabs;
unsigned long nSlab,i,j,k;
const char format[]="%-24s %6u %6u %6u %6u\n";
fSlab=fopen("/proc/slabinfo", "rb");
if(!fSlab){
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fprintf(stderr, "Your kernel doesn't support slabinfo.\n");
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return;
}
if (!moreheaders) slabheader();
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nSlab = getslabinfo(&slabs);
for(k=0; k<nSlab; k++){
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if (moreheaders && ((k%height)==0)) slabheader();
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printf(format,
slabs[k].name,
slabs[k].active_objs,
slabs[k].num_objs,
slabs[k].objsize,
slabs[k].objperslab
);
}
free(slabs);
for(j=1,k=1; j<num_updates; j++) {
sleep(sleep_time);
nSlab = getslabinfo(&slabs);
for(i=0; i<nSlab; i++,k++){
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if (moreheaders && ((k%height)==0)) slabheader();
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printf(format,
slabs[i].name,
slabs[i].active_objs,
slabs[i].num_objs,
slabs[i].objsize,
slabs[i].objperslab
);
}
free(slabs);
}
}
////////////////////////////////////////////////////////////////////////////
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static void disksum_format(void) {
FILE *fDiskstat;
struct disk_stat *disks;
struct partition_stat *partitions;
int ndisks, i;
unsigned long reads, merged_reads, read_sectors, milli_reading, writes,
merged_writes, written_sectors, milli_writing, inprogress_IO,
milli_spent_IO, weighted_milli_spent_IO;
reads=merged_reads=read_sectors=milli_reading=writes=merged_writes= \
written_sectors=milli_writing=inprogress_IO=milli_spent_IO= \
weighted_milli_spent_IO=0;
if ((fDiskstat=fopen("/proc/diskstats", "rb"))){
fclose(fDiskstat);
ndisks=getdiskstat(&disks, &partitions);
printf("%13d disks \n", ndisks);
printf("%13d partitions \n", getpartitions_num(disks, ndisks));
for(i=0; i<ndisks; i++){
reads+=disks[i].reads;
merged_reads+=disks[i].merged_reads;
read_sectors+=disks[i].reads_sectors;
milli_reading+=disks[i].milli_reading;
writes+=disks[i].writes;
merged_writes+=disks[i].merged_writes;
written_sectors+=disks[i].written_sectors;
milli_writing+=disks[i].milli_writing;
inprogress_IO+=disks[i].inprogress_IO?disks[i].inprogress_IO/1000:0;
milli_spent_IO+=disks[i].milli_spent_IO?disks[i].milli_spent_IO/1000:0;
}
printf("%13lu total reads\n",reads);
printf("%13lu merged reads\n",merged_reads);
printf("%13lu read sectors\n",read_sectors);
printf("%13lu milli reading\n",milli_reading);
printf("%13lu writes\n",writes);
printf("%13lu merged writes\n",merged_writes);
printf("%13lu written sectors\n",written_sectors);
printf("%13lu milli writing\n",milli_writing);
printf("%13lu inprogress IO\n",inprogress_IO);
printf("%13lu milli spent IO\n",milli_spent_IO);
free(disks);
free(partitions);
}
}
////////////////////////////////////////////////////////////////////////////
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static void sum_format(void) {
unsigned int running, blocked, btime, processes;
jiff cpu_use, cpu_nic, cpu_sys, cpu_idl, cpu_iow, cpu_xxx, cpu_yyy, cpu_zzz;
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unsigned long pgpgin, pgpgout, pswpin, pswpout;
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unsigned int intr, ctxt;
meminfo();
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getstat(&cpu_use, &cpu_nic, &cpu_sys, &cpu_idl,
&cpu_iow, &cpu_xxx, &cpu_yyy, &cpu_zzz,
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&pgpgin, &pgpgout, &pswpin, &pswpout,
&intr, &ctxt,
&running, &blocked,
&btime, &processes);
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printf("%13lu %s total memory\n", unitConvert(kb_main_total),szDataUnit);
printf("%13lu %s used memory\n", unitConvert(kb_main_used),szDataUnit);
printf("%13lu %s active memory\n", unitConvert(kb_active),szDataUnit);
printf("%13lu %s inactive memory\n", unitConvert(kb_inactive),szDataUnit);
printf("%13lu %s free memory\n", unitConvert(kb_main_free),szDataUnit);
printf("%13lu %s buffer memory\n", unitConvert(kb_main_buffers),szDataUnit);
printf("%13lu %s swap cache\n", unitConvert(kb_main_cached),szDataUnit);
printf("%13lu %s total swap\n", unitConvert(kb_swap_total),szDataUnit);
printf("%13lu %s used swap\n", unitConvert(kb_swap_used),szDataUnit);
printf("%13lu %s free swap\n", unitConvert(kb_swap_free),szDataUnit);
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printf("%13Lu non-nice user cpu ticks\n", cpu_use);
printf("%13Lu nice user cpu ticks\n", cpu_nic);
printf("%13Lu system cpu ticks\n", cpu_sys);
printf("%13Lu idle cpu ticks\n", cpu_idl);
printf("%13Lu IO-wait cpu ticks\n", cpu_iow);
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printf("%13Lu IRQ cpu ticks\n", cpu_xxx);
printf("%13Lu softirq cpu ticks\n", cpu_yyy);
printf("%13Lu stolen cpu ticks\n", cpu_zzz);
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printf("%13lu pages paged in\n", pgpgin);
printf("%13lu pages paged out\n", pgpgout);
printf("%13lu pages swapped in\n", pswpin);
printf("%13lu pages swapped out\n", pswpout);
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printf("%13u interrupts\n", intr);
printf("%13u CPU context switches\n", ctxt);
printf("%13u boot time\n", btime);
printf("%13u forks\n", processes);
}
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////////////////////////////////////////////////////////////////////////////
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static void fork_format(void) {
unsigned int running, blocked, btime, processes;
jiff cpu_use, cpu_nic, cpu_sys, cpu_idl, cpu_iow, cpu_xxx, cpu_yyy, cpu_zzz;
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unsigned long pgpgin, pgpgout, pswpin, pswpout;
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unsigned int intr, ctxt;
getstat(&cpu_use, &cpu_nic, &cpu_sys, &cpu_idl,
&cpu_iow, &cpu_xxx, &cpu_yyy, &cpu_zzz,
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&pgpgin, &pgpgout, &pswpin, &pswpout,
&intr, &ctxt,
&running, &blocked,
&btime, &processes);
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printf("%13u forks\n", processes);
}
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////////////////////////////////////////////////////////////////////////////
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static int winhi(void) {
struct winsize win;
int rows = 24;
if (ioctl(1, TIOCGWINSZ, &win) != -1 && win.ws_row > 0)
rows = win.ws_row;
return rows;
}
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////////////////////////////////////////////////////////////////////////////
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int main(int argc, char *argv[]) {
char *partition = NULL;
int c;
while((c = getopt(argc, argv, "VdafmDnp:S:s")) != EOF) switch(c) {
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case 'V':
display_version();
exit(0);
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case 'd':
statMode |= DISKSTAT;
break;
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case 'a':
/* active/inactive mode */
a_option=1;
break;
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case 'f':
// FIXME: check for conflicting args
fork_format();
exit(0);
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case 'm':
statMode |= SLABSTAT;
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break;
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case 'D':
statMode |= DISKSUMSTAT;
break;
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case 'n':
/* print only one header */
moreheaders=FALSE;
break;
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case 'p':
statMode |= PARTITIONSTAT;
partition = optarg;
if (memcmp(partition, "/dev/", 5) == 0) partition += 5;
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break;
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case 'S':
switch(optarg[0]) {
case 'b': case 'B': dataUnit = UNIT_B; break;
case 'k': dataUnit = UNIT_k; break;
case 'K': dataUnit = UNIT_K; break;
case 'm': dataUnit = UNIT_m; break;
case 'M': dataUnit = UNIT_M; break;
default:
fprintf(stderr, "-S requires k, K, m or M (default is kb)\n");
exit(EXIT_FAILURE);
}
szDataUnit[0] = optarg[0];
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break;
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case 's':
statMode |= VMSUMSTAT;
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break;
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default:
/* no other aguments defined yet. */
usage();
}
if (optind < argc) {
if ((sleep_time = atoi(argv[optind++])) == 0)
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usage();
num_updates = ULONG_MAX;
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}
if (optind < argc)
num_updates = atol(argv[optind++]);
if (optind < argc)
usage();
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if (moreheaders) {
int tmp=winhi()-3;
height=((tmp>0)?tmp:22);
}
setlinebuf(stdout);
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switch(statMode){
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case(VMSTAT): new_format();
break;
case(VMSUMSTAT): sum_format();
break;
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case(DISKSTAT): diskformat();
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break;
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case(PARTITIONSTAT): if(diskpartition_format(partition)==-1)
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printf("Partition was not found\n");
break;
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case(SLABSTAT): slabformat();
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break;
case(DISKSUMSTAT): disksum_format();
break;
default: usage();
break;
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}
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return 0;
}