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atopsar.c
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atopsar.c
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/*
** ATOP - System & Process Monitor
**
** The program 'atop'/'atopsar' offers the possibility to view the activity of
** the system on system-level as well as process-level.
**
** This source-file contains the 'atopsar'-functionality, that makes use
** of the 'atop'-framework.
** ==========================================================================
** Author: Gerlof Langeveld
** E-mail: [email protected]
** Date: July 2007
** --------------------------------------------------------------------------
** Copyright (C) 2007-2010 Gerlof Langeveld
**
** This program is free software; you can redistribute it and/or modify it
** under the terms of the GNU General Public License as published by the
** Free Software Foundation; either version 2, or (at your option) any
** later version.
**
** This program is distributed in the hope that it will be useful, but
** WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
** See the GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
** --------------------------------------------------------------------------
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <time.h>
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <signal.h>
#include <sys/utsname.h>
#include <string.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <regex.h>
#include <sys/ioctl.h>
#include "atop.h"
#include "ifprop.h"
#include "photosyst.h"
#include "photoproc.h"
#define MAXFL 64 /* maximum number of command-line flags */
/*
** color definitions
*/
#define COLSETHEAD "\033[30;43m" /* black on yellow */
#define COLSETMED "\033[36m" /* cyan */
#define COLSETHIGH "\033[31m" /* red */
#define COLRESET "\033[00m" /* reset any color */
/*
** miscellaneous values
*/
static unsigned int nsamples = 9999999;
static char stampalways;
static char usemarkers;
static char allresources;
static int numreports;
static time_t saved_begintime;
static unsigned int repeathead = 9999999;
static unsigned int summarycnt = 1;
static char *datemsg = "-------------------------- analysis "
"date: %s --------------------------\n";
/*
** structure definition for print-functions
*/
struct pridef {
char wanted; /* selected option (boolean) */
char *cntcat; /* used categories of counters */
char flag; /* flag on command line */
void (*prihead)(); /* print header of list */
int (*priline)(struct sstat *, struct tstat *, struct tstat **,
int, time_t, time_t, time_t,
int, int, int, char *,
int, int, int, int, int, int);
/* print counters per line (excl. time) */
char *about; /* statistics about what */
};
extern struct pridef pridef[]; /* table of print-functions */
extern int pricnt; /* total number of print-functions */
static time_t daylim; /* last second of day in epoch */
static int prinow; /* current selection */
static char coloron; /* boolean: colors active now */
/*
** local prototypes
*/
static void engine(void);
static void pratopsaruse(char *);
static void reportlive(time_t, int, struct sstat *);
static char reportraw (time_t, int,
struct devtstat *, struct sstat *,
int, unsigned int, char);
static void reportheader(struct utsname *, time_t);
static time_t daylimit(time_t);
int
atopsar(int argc, char *argv[])
{
register int i, c;
struct rlimit rlim;
char *p, *flaglist;
usecolors = 't';
/*
** interpret command-line arguments & flags
*/
if (argc > 1)
{
/*
** gather all flags for the print-functions
*/
flaglist = malloc(pricnt+32);
ptrverify(flaglist, "Malloc failed for %d flags\n", pricnt+32);
for (i=0; i < pricnt; i++)
flaglist[i] = pridef[i].flag;
flaglist[i] = 0;
/*
** add generic flags
*/
strcat(flaglist, "b:e:SxCMHr:R:aA");
while ((c=getopt(argc, argv, flaglist)) != EOF)
{
switch (c)
{
case '?': /* usage wanted ? */
pratopsaruse(argv[0]);
break;
case 'b': /* begin time ? */
if ( !hhmm2secs(optarg, &begintime) )
pratopsaruse(argv[0]);
saved_begintime = begintime;
break;
case 'e': /* end time ? */
if ( !hhmm2secs(optarg, &endtime) )
pratopsaruse(argv[0]);
break;
case 'r': /* reading of file data ? */
strncpy(rawname, optarg, RAWNAMESZ-1);
rawreadflag++;
break;
case 'R': /* summarize samples */
if (!numeric(optarg))
pratopsaruse(argv[0]);
summarycnt = atoi(optarg);
if (summarycnt < 1)
pratopsaruse(argv[0]);
break;
case 'S': /* timestamp on every line */
stampalways = 1;
break;
case 'x': /* never use colors */
usecolors = 0;
break;
case 'C': /* always use colors */
usecolors = 'a';
break;
case 'M': /* markers for overload */
usemarkers = 1;
break;
case 'H': /* repeat headers */
repeathead = 23; /* define default */
if (isatty(1))
{
struct winsize wsz;
if ( ioctl(1, TIOCGWINSZ, &wsz) != -1)
repeathead = wsz.ws_row - 1;
}
break;
case 'a': /* every interval all units */
allresources = 1;
break;
case 'A': /* all reports wanted ? */
for (i=0; i < pricnt; i++)
pridef[i].wanted = 1;
numreports = pricnt;
break;
default: /* gather report-flags */
for (i=0; i < pricnt; i++)
{
if (pridef[i].flag == c &&
pridef[i].wanted == 0 )
{
pridef[i].wanted = 1;
numreports++;
break;
}
}
if (i == pricnt)
pratopsaruse(argv[0]);
}
}
free(flaglist);
/*
** get optional interval-value and
** optional number of samples
*/
if (optind < argc && optind < MAXFL)
{
if (rawreadflag)
pratopsaruse(argv[0]);
if (!numeric(argv[optind]))
pratopsaruse(argv[0]);
interval = atoi(argv[optind]);
optind++;
if (optind < argc)
{
if (!numeric(argv[optind]) )
pratopsaruse(argv[0]);
if ( (nsamples = atoi(argv[optind])) < 1)
pratopsaruse(argv[0]);
}
}
else /* if no interval specified, read from logfile */
{
rawreadflag++;
}
}
else /* if no flags specified at all, read from logfile */
{
rawreadflag++;
}
/*
** if no report-flags have been specified, take the first
** option in the print-list as default
*/
if (numreports == 0)
{
pridef[0].wanted = 1;
numreports = 1;
}
/*
** set stdout output on line-basis
*/
setvbuf(stdout, (char *)0, _IOLBF, BUFSIZ);
/*
** if only use colors when the output is directed to a tty,
** be sure that output is directed to a tty
*/
if (usecolors == 't')
{
if (! isatty(1) )
usecolors = 0;
}
/*
** check if raw data from a file must be viewed
*/
if (rawreadflag)
{
/*
** select own reportraw-function to be called
** by the rawread function
*/
vis.show_samp = reportraw;
for (i=0; i < pricnt; i++)
{
if ( pridef[i].wanted )
{
prinow = i;
daylim = 0;
begintime = saved_begintime;
rawread();
printf("\n");
}
}
cleanstop(0);
}
/*
** live data must be gathered
**
** determine the name of this node (without domain-name)
** and the kernel-version
*/
(void) uname(&utsname);
if ( (p = strchr(utsname.nodename, '.')) )
*p = '\0';
sscanf(utsname.release, "%d.%d.%d", &osrel, &osvers, &ossub);
/*
** determine the clock rate and memory page size for this machine
*/
hertz = sysconf(_SC_CLK_TCK);
pagesize = sysconf(_SC_PAGESIZE);
/*
** determine start-time for gathering current statistics
*/
curtime = time(0);
/*
** regain the root-priviliges that we dropped at the beginning
** to do some priviliged work now
*/
regainrootprivs();
/*
** lock in memory to get reliable samples (also when
** memory is low);
** ignored if not running under superuser privileges!
*/
rlim.rlim_cur = RLIM_INFINITY;
rlim.rlim_max = RLIM_INFINITY;
(void) setrlimit(RLIMIT_MEMLOCK, &rlim);
(void) mlockall(MCL_CURRENT|MCL_FUTURE);
/*
** increment CPU scheduling-priority to get reliable samples (also
** during heavy CPU load);
** ignored if not running under superuser privileges!
*/
if ( nice(-20) == -1)
;
/*
** determine properties (like speed) of all interfaces
*/
initifprop();
/*
** since privileged activities are finished now, there is no
** need to keep running under root-privileges, so switch
** effective user-id to real user-id
*/
if (! droprootprivs() )
cleanstop(42);
/*
** start live reporting
*/
engine();
return 0;
}
/*
** engine() that drives the main-loop for atopsar
*/
static void
engine(void)
{
struct sigaction sigact;
void getusr1(int);
/*
** reserve space for system-level statistics
*/
static struct sstat *cursstat; /* current */
static struct sstat *presstat; /* previous */
static struct sstat *devsstat; /* deviation */
static struct sstat *hlpsstat;
/*
** initialization: allocate required memory dynamically
*/
cursstat = calloc(1, sizeof(struct sstat));
presstat = calloc(1, sizeof(struct sstat));
devsstat = calloc(1, sizeof(struct sstat));
ptrverify(cursstat, "Malloc failed for current sysstats\n");
ptrverify(presstat, "Malloc failed for prev sysstats\n");
ptrverify(devsstat, "Malloc failed for deviate sysstats\n");
/*
** install the signal-handler for ALARM and SIGUSR1 (both triggers
** for the next sample)
*/
memset(&sigact, 0, sizeof sigact);
sigact.sa_handler = getusr1;
sigaction(SIGUSR1, &sigact, (struct sigaction *)0);
memset(&sigact, 0, sizeof sigact);
sigact.sa_handler = getalarm;
sigaction(SIGALRM, &sigact, (struct sigaction *)0);
if (interval > 0)
alarm(interval);
/*
** print overall report header
*/
reportheader(&utsname, time(0));
/*
** MAIN-LOOP:
** - Wait for the requested number of seconds or for other trigger
**
** - System-level counters
** get current counters
** calculate the differences with the previous sample
**
** - Call the print-function to visualize the differences
*/
for (sampcnt=0; sampcnt < nsamples+1; sampcnt++)
{
/*
** wait for alarm-signal to arrive or
** wait for SIGUSR1 in case of an interval of 0.
*/
if (sampcnt > 0)
pause();
/*
** gather time info for this sample
*/
pretime = curtime;
curtime = time(0); /* seconds since 1-1-1970 */
/*
** take a snapshot of the current system-level statistics
** and calculate the deviations (i.e. calculate the activity
** during the last sample)
*/
hlpsstat = cursstat; /* swap current/prev. stats */
cursstat = presstat;
presstat = hlpsstat;
photosyst(cursstat); /* obtain new counters */
deviatsyst(cursstat, presstat, devsstat,
curtime-pretime > 0 ? curtime-pretime : 1);
/*
** activate the report-function to visualize the deviations
*/
reportlive(curtime,
curtime-pretime > 0 ? curtime-pretime : 1, devsstat);
} /* end of main-loop */
}
/*
** report function to print a new sample in case of live measurements
*/
static void
reportlive(time_t curtime, int numsecs, struct sstat *ss)
{
char timebuf[16], datebuf[16];
int i, nr = numreports, rv;
static unsigned int curline, headline;
/*
** printing more reports needs another way of handling compared
** to printing one report
*/
if (numreports > 1)
{
/*
** skip first sample
*/
if (sampcnt == 0)
return;
printf(datemsg, convdate(curtime, datebuf));
for (i=0; i < pricnt && nr > 0; i++)
{
if ( !pridef[i].wanted )
continue;
nr--;
/*
** print header-line
*/
printf("\n");
if (usecolors)
printf(COLSETHEAD);
printf("%s ", convtime(curtime-numsecs, timebuf));
(pridef[i].prihead)(osvers, osrel, ossub);
if (usecolors)
printf(COLRESET);
printf("\n");
/*
** print line with statistical counters
*/
printf("%s ", convtime(curtime, timebuf));
if ( !(pridef[i].priline)(ss, (struct tstat *)0, 0, 0,
numsecs, numsecs*hertz, hertz,
osvers, osrel, ossub,
stampalways ? timebuf : " ",
0, 0, 0, 0, 0, 0) )
{
/*
** print line has failed;
** do not call function again
*/
pridef[i].wanted = 0;
if (--numreports == 0)
cleanstop(1);
}
}
printf("\n");
}
else /* just one report to be printed */
{
/*
** search required report
*/
for (i=0; i < pricnt; i++)
if ( pridef[i].wanted )
break;
/*
** verify if we have passed midnight of some day
*/
if (curtime > daylim)
{
printf(datemsg, convdate(curtime, datebuf));
daylim = daylimit(curtime);
curline++;
}
/*
** print first header
*/
if (sampcnt == 0)
{
/*
** print header-line
*/
printf("\n");
if (usecolors)
printf(COLSETHEAD);
printf("%s ", convtime(curtime, timebuf));
(pridef[i].prihead)(osvers, osrel, ossub);
if (usecolors)
printf(COLRESET);
printf("\n");
curline+=2;
headline = repeathead;
return;
}
/*
** print line with statistical counters
*/
printf("%s ", convtime(curtime, timebuf));
if ( !(rv = (pridef[i].priline)(ss, (struct tstat *)0, 0, 0,
numsecs, numsecs*hertz, hertz,
osvers, osrel, ossub,
stampalways ? timebuf : " ",
0, 0, 0, 0, 0, 0) ) )
{
/*
** print line has failed;
** do not call function again
*/
cleanstop(1);
}
curline+=rv;
if (curline >= headline)
{
headline = curline + repeathead;
/*
** print header-line
*/
printf("\n");
if (usecolors)
printf(COLSETHEAD);
printf("%s ", convtime(curtime, timebuf));
(pridef[i].prihead)(osvers, osrel, ossub);
if (usecolors)
printf(COLRESET);
printf("\n");
curline+=2;
}
}
}
/*
** report function to print a new sample in case of logged measurements
*/
static char
reportraw(time_t curtime, int numsecs,
struct devtstat *devtstat, struct sstat *sstat,
int nexit, unsigned int noverflow, char flags)
{
static char firstcall = 1;
char timebuf[16], datebuf[16];
unsigned int rv;
static unsigned int curline, headline, sampsum,
totalsec, totalexit, lastnpres,
lastntrun, lastntslpi, lastntslpu, lastnzomb;
static time_t lasttime;
static struct sstat totsyst;
/*
** is this function still wanted?
*/
if ( ! pridef[prinow].wanted )
return '\0';
/*
** when this is first call to this function,
** print overall header with system information
*/
if (firstcall)
{
reportheader(&utsname, time(0));
firstcall = 0;
}
/*
** verify if we have passed midnight
*/
if (curtime > daylim)
{
printf(datemsg, convdate(curtime, datebuf));
daylim = daylimit(curtime);
curline++;
}
/*
** when this is the first record for a new report,
** initialize various variables
*/
if (sampcnt == 1)
{
/*
** initialize variables for new report
*/
pretime = curtime;
curline = 1;
headline = 0;
sampsum = summarycnt + 1;
totalsec = 0;
totalexit = 0;
memset(&totsyst, 0, sizeof totsyst);
return '\0';
}
/*
** check if a (new) report header needs to be printed
*/
if (curline >= headline)
{
headline = curline + repeathead;
/*
** print header-line
*/
printf("\n");
if (usecolors)
printf(COLSETHEAD);
printf("%s ", convtime(pretime, timebuf));
(pridef[prinow].prihead)(osvers, osrel, ossub);
if (usecolors)
printf(COLRESET);
printf("\n");
curline+=2;
}
/*
** when current record contains log-restart indicator,
** print message and reinitialize variables
*/
if (flags & RRBOOT)
{
/*
** when accumulating counters, print results upto
** the *previous* record
*/
if (summarycnt > 1 && sampcnt <= sampsum && totalsec)
{
printf("%s ", convtime(lasttime, timebuf));
rv = (pridef[prinow].priline)(&totsyst,
(struct tstat *)0, 0, 0,
totalsec, totalsec*hertz, hertz,
osvers, osrel, ossub,
stampalways ? timebuf : " ",
lastnpres, lastntrun, lastntslpi, lastntslpu,
totalexit, lastnzomb);
if (rv == 0)
{
curline++;
pridef[prinow].wanted = 0; /* not call again */
if (--numreports == 0)
cleanstop(1);
}
else
{
curline += rv;
}
}
/*
** print restart-line in case of logging restarted
*/
printf("%s ", convtime(curtime, timebuf));
printf("......................... logging restarted "
".........................\n");
pretime = curtime;
curline++;
/*
** reinitialize variables
*/
sampsum = summarycnt + sampcnt;
totalsec = 0;
totalexit = 0;
memset(&totsyst, 0, sizeof totsyst);
return '\0';
}
/*
** when no accumulation is required,
** just print current sample
*/
if (summarycnt == 1)
{
printf("%s ", convtime(curtime, timebuf));
rv = (pridef[prinow].priline) (sstat, devtstat->taskall,
devtstat->procall, devtstat->nprocall,
numsecs, numsecs*hertz, hertz,
osvers, osrel, ossub,
stampalways ? timebuf : " ",
devtstat->ntaskall, devtstat->totrun,
devtstat->totslpi, devtstat->totslpu,
nexit, devtstat->totzombie);
if (rv == 0)
{
curline++;
pridef[prinow].wanted = 0; /* not call again */
if (--numreports == 0)
cleanstop(1);
}
else
{
curline += rv;
}
}
else /* accumulation is required */
{
char *cp = pridef[prinow].cntcat;
/*
** maintain totals per category
*/
while (*cp)
{
totalsyst(*cp, sstat, &totsyst);
cp++;
}
totalsec += numsecs;
totalexit += nexit;
/*
** remember some values in case the next record
** contains the log-restart indicator
*/
lasttime = curtime;
lastnpres = devtstat->nprocall;
lastntrun = devtstat->totrun;
lastntslpi = devtstat->totslpi;
lastntslpu = devtstat->totslpu;
lastnzomb = devtstat->totzombie;
/*
** print line only if needed
*/
if (sampcnt >= sampsum || ( (flags&RRLAST) && totalsec) )
{
/*
** print output line for required report
*/
printf("%s ", convtime(curtime, timebuf));
rv = (pridef[prinow].priline) (&totsyst,
(struct tstat *)0, 0, 0,
totalsec, totalsec*hertz, hertz,
osvers, osrel, ossub,
stampalways ? timebuf : " ",
devtstat->ntaskall, devtstat->totrun,
devtstat->totslpi, devtstat->totslpu,
totalexit, devtstat->totzombie);
if (rv == 0)
{
curline++;
pridef[prinow].wanted = 0; /* not call again */
if (--numreports == 0)
cleanstop(1);
}
else
{
curline += rv;
}
sampsum = summarycnt + sampcnt;
totalsec = 0;
totalexit = 0;
memset(&totsyst, 0, sizeof totsyst);
}
else
{
rv = 1;
}
}
if (!rv)
{
/*
** print for line has failed;
** never call this function again
*/
pridef[prinow].wanted = 0;
if (--numreports == 0)
cleanstop(1);
}
pretime = curtime;
return '\0';
}
/*
** print overall header
*/
static void
reportheader(struct utsname *uname, time_t mtime)
{
char cdate[16];
printf("\n%s %s %s %s %s\n\n",
uname->nodename,
uname->release,
uname->version,
uname->machine,
convdate(mtime, cdate));
}
/*
** print usage of atopsar command
*/
void
pratopsaruse(char *myname)
{
int i;
fprintf(stderr,
"Usage: %s [-flags] [-r file|date|y...] [-R cnt] [-b hh:mm] [-e hh:mm]\n",
myname);
fprintf(stderr, "\t\tor\n");
fprintf(stderr,
"Usage: %s [-flags] interval [samples]\n", myname);
fprintf(stderr, "\n");
fprintf(stderr,
"\tToday's atop logfile is used by default!\n");
fprintf(stderr, "\n");
fprintf(stderr,
"\tGeneric flags:\n");
fprintf(stderr,
"\t -r read statistical data from specific atop logfile\n");
fprintf(stderr,
"\t (pathname, or date in format YYYYMMDD, or y[y..])\n");
fprintf(stderr,
"\t -R summarize <cnt> samples into one sample\n");
fprintf(stderr,
"\t -b begin showing data from specified time\n");
fprintf(stderr,
"\t -e finish showing data after specified time\n");
fprintf(stderr,
"\t -S print timestamp on every line in case of more "
"resources\n");
fprintf(stderr,
"\t -x never use colors to indicate overload"
" (default: only if tty)\n");
fprintf(stderr,
"\t -C always use colors to indicate overload"
" (default: only if tty)\n");
fprintf(stderr,
"\t -M use markers to indicate overload "
"(* = critical, + = almost)\n");
fprintf(stderr,
"\t -H repeat report headers "
"(in case of tty: depending on screen lines)\n");
fprintf(stderr,
"\t -a print all resources, even when inactive\n");
fprintf(stderr, "\n");
fprintf(stderr,
"\tSpecific flags to select reports:\n");
fprintf(stderr,
"\t -A print all available reports\n");
for (i=0; i < pricnt; i++)
fprintf(stderr,
"\t -%c %s\n", pridef[i].flag, pridef[i].about);
fprintf(stderr, "\n");
fprintf(stderr,
"Please refer to the man-page of 'atopsar' "
"for more details.\n");
cleanstop(1);