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/* $Id$ */
/* Copyright (C) 1998-99 Martin Baulig
This file is part of LibGTop 1.0.
Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
LibGTop 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 of the License,
or (at your option) any later version.
LibGTop 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 LibGTop; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/proctime.h>
#include <glibtop/uptime.h>
static const unsigned long _glibtop_sysdeps_proc_time =
(1L << GLIBTOP_PROC_TIME_UTIME) + (1L << GLIBTOP_PROC_TIME_CUTIME) +
(1L << GLIBTOP_PROC_TIME_RTIME) +
(1L << GLIBTOP_PROC_TIME_STIME) + (1L << GLIBTOP_PROC_TIME_CSTIME) +
(1L << GLIBTOP_PROC_TIME_FREQUENCY) + (1L << GLIBTOP_PROC_TIME_TIMEOUT) +
(1L << GLIBTOP_PROC_TIME_IT_REAL_VALUE) + (1L << GLIBTOP_PROC_TIME_START_TIME);
static const unsigned long _glibtop_sysdeps_proc_time_smp =
(1L << GLIBTOP_PROC_TIME_XCPU_UTIME) + (1L << GLIBTOP_PROC_TIME_XCPU_STIME);
/* Init function. */
void
glibtop_init_proc_time_s (glibtop *server)
{
server->sysdeps.proc_time = _glibtop_sysdeps_proc_time;
if (server->ncpu)
server->sysdeps.proc_time |= _glibtop_sysdeps_proc_time_smp;
}
/* Provides detailed information about a process. */
void
glibtop_get_proc_time_s (glibtop *server, glibtop_proc_time *buf, pid_t pid)
{
char buffer [BUFSIZ], *p;
int i;
glibtop_init_s (&server, GLIBTOP_SYSDEPS_PROC_TIME, 0);
memset (buf, 0, sizeof (glibtop_proc_time));
if (proc_stat_to_buffer (buffer, pid))
return;
p = proc_stat_after_cmd (buffer);
if (!p) return;
p = skip_multiple_token (p, 11);
/* clock_t (1/100 s) */
buf->utime = strtoull (p, &p, 0);
buf->stime = strtoull (p, &p, 0);
buf->rtime = buf->utime + buf->stime;
buf->cutime = strtoull (p, &p, 0);
buf->cstime = strtoull (p, &p, 0);
p = skip_multiple_token (p, 3);
/* timeout is 0 on 2.4 and "thread_number" on 2.6
lets skip it (using previous skip_multiple_token)
buf->timeout = strtoull (p, &p, 0);
*/
buf->it_real_value = strtoull (p, &p, 0);
/* seconds since epoch */
{
/* Linux provides start_time as clock_t representing
the start of <pid> after boot_time.
Let's use glibtop_get_uptime to get boot_time.
But i'm not sure if this is safe
See libgtop documentation.
#ifdef __KERNEL__
...
*
* Have the 32 bit jiffies value wrap 5 minutes after boot
* so jiffies wrap bugs show up earlier.
*
#define INITIAL_JIFFIES ((unsigned long)(unsigned int) (-300*HZ))
...
#endif
start_time may be incremented by INITIAL_JIFFIES, so start_time
may be not be exact. You may also get wrong start_time if your
system clock is not synchronised with you hardware clock.
'man hwclock'
*/
glibtop_uptime up;
glibtop_get_uptime_s(server, &up);
buf->start_time = up.boot_time + strtoull (p, &p, 0) / 100;
}
buf->frequency = 100;
buf->flags = _glibtop_sysdeps_proc_time;
if (!server->ncpu)
return;
/* FIXME: doesn't work with 2.6 */
if (proc_file_to_buffer (buffer, "/proc/%d/cpu", pid))
return;
p = skip_multiple_token (p, 3);
for (i = 0; i < GLIBTOP_NCPU; i++) {
if (strncmp (p+1, "cpu", 3) || !isdigit (p [4]))
break;
p += 6;
buf->xcpu_utime [i] = strtoull (p, &p, 0);
buf->xcpu_stime [i] = strtoull (p, &p, 0);
}
buf->flags |= _glibtop_sysdeps_proc_time_smp;
}
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