Blame sysdeps/linux/proctime.c

Packit Service 407539
/* Copyright (C) 1998-99 Martin Baulig
Packit Service 407539
   This file is part of LibGTop 1.0.
Packit Service 407539
Packit Service 407539
   Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
Packit Service 407539
Packit Service 407539
   LibGTop is free software; you can redistribute it and/or modify it
Packit Service 407539
   under the terms of the GNU General Public License as published by
Packit Service 407539
   the Free Software Foundation; either version 2 of the License,
Packit Service 407539
   or (at your option) any later version.
Packit Service 407539
Packit Service 407539
   LibGTop is distributed in the hope that it will be useful, but WITHOUT
Packit Service 407539
   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
Packit Service 407539
   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
Packit Service 407539
   for more details.
Packit Service 407539
Packit Service 407539
   You should have received a copy of the GNU General Public License
Packit Service 407539
   along with LibGTop; see the file COPYING. If not, write to the
Packit Service 407539
   Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Packit Service 407539
   Boston, MA 02110-1301, USA.
Packit Service 407539
*/
Packit Service 407539
Packit Service 407539
#include <config.h>
Packit Service 407539
#include <glibtop.h>
Packit Service 407539
#include <glibtop/error.h>
Packit Service 407539
#include <glibtop/proctime.h>
Packit Service 407539
#include <glibtop/uptime.h>
Packit Service 407539
Packit Service 407539
#include "glibtop_private.h"
Packit Service 407539
Packit Service 407539
static const unsigned long _glibtop_sysdeps_proc_time =
Packit Service 407539
(1L << GLIBTOP_PROC_TIME_UTIME) + (1L << GLIBTOP_PROC_TIME_CUTIME) +
Packit Service 407539
(1L << GLIBTOP_PROC_TIME_RTIME) +
Packit Service 407539
(1L << GLIBTOP_PROC_TIME_STIME) + (1L << GLIBTOP_PROC_TIME_CSTIME) +
Packit Service 407539
(1L << GLIBTOP_PROC_TIME_FREQUENCY) + (1L << GLIBTOP_PROC_TIME_TIMEOUT) +
Packit Service 407539
(1L << GLIBTOP_PROC_TIME_IT_REAL_VALUE) + (1L << GLIBTOP_PROC_TIME_START_TIME);
Packit Service 407539
Packit Service 407539
static const unsigned long _glibtop_sysdeps_proc_time_smp =
Packit Service 407539
(1L << GLIBTOP_PROC_TIME_XCPU_UTIME) + (1L << GLIBTOP_PROC_TIME_XCPU_STIME);
Packit Service 407539
Packit Service 407539
/* Init function. */
Packit Service 407539
Packit Service 407539
void
Packit Service 407539
_glibtop_init_proc_time_s (glibtop *server)
Packit Service 407539
{
Packit Service 407539
	server->sysdeps.proc_time = _glibtop_sysdeps_proc_time;
Packit Service 407539
Packit Service 407539
	if (server->ncpu)
Packit Service 407539
		server->sysdeps.proc_time |= _glibtop_sysdeps_proc_time_smp;
Packit Service 407539
}
Packit Service 407539
Packit Service 407539
/* Provides detailed information about a process. */
Packit Service 407539
Packit Service 407539
void
Packit Service 407539
glibtop_get_proc_time_s (glibtop *server, glibtop_proc_time *buf, pid_t pid)
Packit Service 407539
{
Packit Service 407539
	char buffer [BUFSIZ], *p;
Packit Service 407539
	int i;
Packit Service 407539
Packit Service 407539
	memset (buf, 0, sizeof (glibtop_proc_time));
Packit Service 407539
Packit Service 407539
	if (proc_stat_to_buffer(buffer, sizeof buffer, pid))
Packit Service 407539
		return;
Packit Service 407539
Packit Service 407539
	p = proc_stat_after_cmd (buffer);
Packit Service 407539
	if (!p) return;
Packit Service 407539
Packit Service 407539
	p = skip_multiple_token (p, 11);
Packit Service 407539
Packit Service 407539
	/* clock_t  (1/100 s) */
Packit Service 407539
	buf->utime  = strtoull (p, &p, 0);
Packit Service 407539
	buf->stime  = strtoull (p, &p, 0);
Packit Service 407539
	buf->rtime = buf->utime + buf->stime;
Packit Service 407539
Packit Service 407539
	buf->cutime = strtoull (p, &p, 0);
Packit Service 407539
	buf->cstime = strtoull (p, &p, 0);
Packit Service 407539
Packit Service 407539
	p = skip_multiple_token (p, 3);
Packit Service 407539
Packit Service 407539
	/* timeout is 0 on 2.4 and "thread_number" on 2.6
Packit Service 407539
	   lets skip it (using previous skip_multiple_token)
Packit Service 407539
	   buf->timeout       = strtoull (p, &p, 0);
Packit Service 407539
	*/
Packit Service 407539
	buf->it_real_value = strtoull (p, &p, 0);
Packit Service 407539
Packit Service 407539
	/* seconds since epoch */
Packit Service 407539
	{
Packit Service 407539
	  /*
Packit Service 407539
	     See libgtop documentation.
Packit Service 407539
Packit Service 407539
	     #ifdef __KERNEL__
Packit Service 407539
	     ...
Packit Service 407539
	     *
Packit Service 407539
	     * Have the 32 bit jiffies value wrap 5 minutes after boot
Packit Service 407539
	     * so jiffies wrap bugs show up earlier.
Packit Service 407539
	     *
Packit Service 407539
	     #define INITIAL_JIFFIES ((unsigned long)(unsigned int) (-300*HZ))
Packit Service 407539
	     ...
Packit Service 407539
	     #endif
Packit Service 407539
Packit Service 407539
	     start_time may be incremented by INITIAL_JIFFIES, so start_time
Packit Service 407539
	     may be not be exact. You may also get wrong start_time if your
Packit Service 407539
	     system clock is not synchronised with you hardware clock.
Packit Service 407539
	     'man hwclock'
Packit Service 407539
	  */
Packit Service 407539
	  buf->start_time = get_boot_time(server) + strtoull (p, &p, 0) / 100;
Packit Service 407539
	}
Packit Service 407539
Packit Service 407539
	buf->frequency = 100;
Packit Service 407539
Packit Service 407539
	buf->flags = _glibtop_sysdeps_proc_time;
Packit Service 407539
Packit Service 407539
	if (!server->ncpu)
Packit Service 407539
		return;
Packit Service 407539
Packit Service 407539
	/* FIXME: doesn't work with 2.6 */
Packit Service 407539
	if (proc_file_to_buffer(buffer, sizeof buffer, "/proc/%d/cpu", pid))
Packit Service 407539
		return;
Packit Service 407539
Packit Service 407539
	p = skip_multiple_token (p, 3);
Packit Service 407539
Packit Service 407539
	for (i = 0; i <= server->ncpu; i++) {
Packit Service 407539
Packit Service 407539
		if (!check_cpu_line_warn(server, p + 1, i))
Packit Service 407539
			break;
Packit Service 407539
Packit Service 407539
		p = skip_token(p);
Packit Service 407539
		buf->xcpu_utime [i] = strtoull (p, &p, 0);
Packit Service 407539
		buf->xcpu_stime [i] = strtoull (p, &p, 0);
Packit Service 407539
	}
Packit Service 407539
Packit Service 407539
	buf->flags |= _glibtop_sysdeps_proc_time_smp;
Packit Service 407539
}