did -s and -f for rodenstein
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albert
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4e7de4274d
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c64633ab31
13
vmstat.8
13
vmstat.8
@ -11,6 +11,10 @@ vmstat \- Report virtual memory statistics
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.RI [ delay " [ " count ]]
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.br
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.B vmstat
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.RB [ "\-f" ]
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.RB [ "\-s" ]
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.br
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.B vmstat
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.RB [ "\-V" ]
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.SH DESCRIPTION
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\fBvmstat\fP reports information about processes, memory, paging,
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@ -23,8 +27,17 @@ The process and memory reports are instantaneous in either case.
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.SS Options
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The \fB-a\fP switch displays active/inactive memory, given a 2.5.41 kernel or better.
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.PP
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The \fB-f\fP switch displays the number of forks since boot.
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This includes the fork, vfork, and clone system calls, and is
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equivalent to the total number of tasks created. Each process
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is represented by one or more tasks, depending on thread usage.
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This display does not repeat.
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.PP
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The \fB-n\fP switch causes the header to be displayed only once rather than periodically.
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.PP
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The \fB-s\fP switch displays a table of various event counters
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and memory statistics. This display does not repeat.
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.PP
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.I delay
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is the delay between updates in seconds. If no delay is specified,
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only one report is printed with the average values since boot.
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103
vmstat.c
103
vmstat.c
@ -1,5 +1,6 @@
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/* Copyright 1994 by Henry Ware <al172@yfn.ysu.edu>. Copyleft same year. */
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// old: "Copyright 1994 by Henry Ware <al172@yfn.ysu.edu>. Copyleft same year."
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// most code copyright 2002 Albert Cahalan
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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@ -98,8 +99,9 @@ static void getrunners(unsigned int *restrict running, unsigned int *restrict bl
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static void getstat(jiff *restrict cuse, jiff *restrict cice, jiff *restrict csys, jiff *restrict cide, jiff *restrict ciow,
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unsigned *restrict pin, unsigned *restrict pout, unsigned *restrict s_in, unsigned *restrict sout,
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unsigned *restrict itot, unsigned *restrict i1, unsigned *restrict ct,
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unsigned int *restrict running, unsigned int *restrict blocked) {
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unsigned *restrict intr, unsigned *restrict ctxt,
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unsigned int *restrict running, unsigned int *restrict blocked,
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unsigned int *restrict btime, unsigned int *restrict processes) {
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static int fd;
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int need_vmstat_file = 0;
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int need_proc_scan = 0;
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@ -113,8 +115,7 @@ static void getstat(jiff *restrict cuse, jiff *restrict cice, jiff *restrict csy
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if(fd == -1) crash("/proc/stat");
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}
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read(fd,buff,BUFFSIZE-1);
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*itot = 0;
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*i1 = 1; /* ensure assert below will fail if the sscanf bombs */
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*intr = 0;
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*ciow = 0; /* not separated out until the 2.5.41 kernel */
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b = strstr(buff, "cpu ");
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@ -129,10 +130,16 @@ static void getstat(jiff *restrict cuse, jiff *restrict cice, jiff *restrict csy
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else need_vmstat_file = 1;
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b = strstr(buff, "intr ");
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if(b) sscanf(b, "intr %u %u", itot, i1);
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if(b) sscanf(b, "intr %u", intr);
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b = strstr(buff, "ctxt ");
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if(b) sscanf(b, "ctxt %u", ct);
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if(b) sscanf(b, "ctxt %u", ctxt);
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b = strstr(buff, "btime ");
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if(b) sscanf(b, "btime %u", btime);
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b = strstr(buff, "processes ");
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if(b) sscanf(b, "processes %u", processes);
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b = strstr(buff, "procs_running ");
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if(b) sscanf(b, "procs_running %u", running);
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@ -245,11 +252,11 @@ static void new_format(void) {
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unsigned int tog=0; /* toggle switch for cleaner code */
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unsigned int i;
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unsigned int hz = Hertz;
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unsigned int running,blocked;
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unsigned int running,blocked,dummy_1,dummy_2;
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jiff cpu_use[2], cpu_nic[2], cpu_sys[2], cpu_idl[2], cpu_iow[2];
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jiff duse,dsys,didl,diow,Div,divo2;
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jiff duse, dsys, didl, diow, Div, divo2;
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unsigned int pgpgin[2], pgpgout[2], pswpin[2], pswpout[2];
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unsigned int inter[2],ticks[2],ctxt[2];
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unsigned int intr[2], ctxt[2];
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unsigned int sleep_half;
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unsigned int kb_per_page = sysconf(_SC_PAGESIZE) / 1024;
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int debt = 0; // handle idle ticks running backwards
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@ -260,8 +267,9 @@ static void new_format(void) {
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meminfo();
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getstat(cpu_use,cpu_nic,cpu_sys,cpu_idl,cpu_iow,
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pgpgin,pgpgout,pswpin,pswpout,
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inter,ticks,ctxt,
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&running,&blocked);
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intr,ctxt,
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&running,&blocked,
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&dummy_1, &dummy_2);
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duse= *cpu_use + *cpu_nic;
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dsys= *cpu_sys;
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didl= *cpu_idl;
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@ -277,7 +285,7 @@ static void new_format(void) {
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(unsigned)( (*pswpout * kb_per_page * hz + divo2) / Div ),
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(unsigned)( (*pgpgin * hz + divo2) / Div ),
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(unsigned)( (*pgpgout * hz + divo2) / Div ),
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(unsigned)( (*inter * hz + divo2) / Div ),
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(unsigned)( (*intr * hz + divo2) / Div ),
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(unsigned)( (*ctxt * hz + divo2) / Div ),
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(unsigned)( (100*duse + divo2) / Div ),
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(unsigned)( (100*dsys + divo2) / Div ),
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@ -293,8 +301,9 @@ static void new_format(void) {
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meminfo();
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getstat(cpu_use+tog,cpu_nic+tog,cpu_sys+tog,cpu_idl+tog,cpu_iow+tog,
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pgpgin+tog,pgpgout+tog,pswpin+tog,pswpout+tog,
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inter+tog,ticks+tog,ctxt+tog,
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&running,&blocked);
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intr+tog,ctxt+tog,
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&running,&blocked,
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&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];
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didl= cpu_idl[tog]-cpu_idl[!tog];
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@ -321,7 +330,7 @@ static void new_format(void) {
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(unsigned)( ( (pswpout[tog] - pswpout[!tog])*kb_per_page+sleep_half )/sleep_time ),
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(unsigned)( ( pgpgin [tog] - pgpgin [!tog] +sleep_half )/sleep_time ),
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(unsigned)( ( pgpgout[tog] - pgpgout[!tog] +sleep_half )/sleep_time ),
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(unsigned)( ( inter [tog] - inter [!tog] +sleep_half )/sleep_time ),
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(unsigned)( ( intr [tog] - intr [!tog] +sleep_half )/sleep_time ),
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(unsigned)( ( ctxt [tog] - ctxt [!tog] +sleep_half )/sleep_time ),
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(unsigned)( (100*duse+divo2)/Div ),
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(unsigned)( (100*dsys+divo2)/Div ),
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@ -334,6 +343,58 @@ static void new_format(void) {
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//////////////////////////////////////////////////////////////////////////////////////
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static void sum_format(void) {
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unsigned int running, blocked, btime, processes;
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jiff cpu_use, cpu_nic, cpu_sys, cpu_idl, cpu_iow;
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unsigned int pgpgin, pgpgout, pswpin, pswpout;
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unsigned int intr, ctxt;
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meminfo();
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getstat(&cpu_use, &cpu_nic, &cpu_sys, &cpu_idl, &cpu_iow,
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&pgpgin, &pgpgout, &pswpin, &pswpout,
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&intr, &ctxt,
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&running, &blocked,
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&btime, &processes);
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printf("%13u kB total memory\n", kb_main_total);
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printf("%13u kB used memory\n", kb_main_used);
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printf("%13u kB active memory\n", kb_active);
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printf("%13u kB inactive memory\n", kb_inactive);
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printf("%13u kB free memory\n", kb_main_free);
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printf("%13u kB buffer memory\n", kb_main_buffers);
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printf("%13u kB swap cache\n", kb_main_cached);
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printf("%13u kB total swap\n", kb_swap_total);
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printf("%13u kB used swap\n", kb_swap_used);
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printf("%13u kB free swap\n", kb_swap_free);
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printf("%13Lu non-nice user cpu ticks\n", cpu_use);
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printf("%13Lu nice user cpu ticks\n", cpu_nic);
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printf("%13Lu system cpu ticks\n", cpu_sys);
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printf("%13Lu idle cpu ticks\n", cpu_idl);
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printf("%13Lu IO-wait cpu ticks\n", cpu_iow);
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printf("%13u pages paged in\n", pgpgin);
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printf("%13u pages paged out\n", pgpgout);
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printf("%13u pages swapped in\n", pswpin);
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printf("%13u pages swapped out\n", pswpout);
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printf("%13u interrupts\n", intr);
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printf("%13u CPU context switches\n", ctxt);
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printf("%13u boot time\n", btime);
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printf("%13u forks\n", processes);
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}
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static void fork_format(void) {
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unsigned int running, blocked, btime, processes;
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jiff cpu_use, cpu_nic, cpu_sys, cpu_idl, cpu_iow;
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unsigned int pgpgin, pgpgout, pswpin, pswpout;
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unsigned int intr, ctxt;
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getstat(&cpu_use, &cpu_nic, &cpu_sys, &cpu_idl, &cpu_iow,
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&pgpgin, &pgpgout, &pswpin, &pswpout,
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&intr, &ctxt,
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&running, &blocked,
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&btime, &processes);
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printf("%13u forks\n", processes);
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}
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static int winhi(void) {
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struct winsize win;
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int rows = 24;
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@ -357,10 +418,18 @@ int main(int argc, char *argv[]) {
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/* active/inactive mode */
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a_option=1;
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break;
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case 'f':
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// FIXME: check for conflicting args
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fork_format();
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exit(0);
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case 'n':
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/* print only one header */
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moreheaders=FALSE;
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break;
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case 's':
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// FIXME: check for conflicting args
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sum_format();
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exit(0);
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default:
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/* no other aguments defined yet. */
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usage();
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