140 lines
3.9 KiB
C
140 lines
3.9 KiB
C
/* $Id$ */
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/* Copyright (C) 1998-99 Martin Baulig
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This file is part of LibGTop 1.0.
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Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
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LibGTop is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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LibGTop is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with LibGTop; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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*/
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#include <glibtop.h>
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#include <glibtop/error.h>
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#include <glibtop/proctime.h>
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#include <glibtop/uptime.h>
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static const unsigned long _glibtop_sysdeps_proc_time =
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(1L << GLIBTOP_PROC_TIME_UTIME) + (1L << GLIBTOP_PROC_TIME_CUTIME) +
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(1L << GLIBTOP_PROC_TIME_RTIME) +
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(1L << GLIBTOP_PROC_TIME_STIME) + (1L << GLIBTOP_PROC_TIME_CSTIME) +
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(1L << GLIBTOP_PROC_TIME_FREQUENCY) + (1L << GLIBTOP_PROC_TIME_TIMEOUT) +
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(1L << GLIBTOP_PROC_TIME_IT_REAL_VALUE) + (1L << GLIBTOP_PROC_TIME_START_TIME);
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static const unsigned long _glibtop_sysdeps_proc_time_smp =
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(1L << GLIBTOP_PROC_TIME_XCPU_UTIME) + (1L << GLIBTOP_PROC_TIME_XCPU_STIME);
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/* Init function. */
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void
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glibtop_init_proc_time_s (glibtop *server)
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{
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server->sysdeps.proc_time = _glibtop_sysdeps_proc_time;
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if (server->ncpu)
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server->sysdeps.proc_time |= _glibtop_sysdeps_proc_time_smp;
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}
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/* Provides detailed information about a process. */
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void
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glibtop_get_proc_time_s (glibtop *server, glibtop_proc_time *buf, pid_t pid)
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{
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char buffer [BUFSIZ], *p;
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int i;
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glibtop_init_s (&server, GLIBTOP_SYSDEPS_PROC_TIME, 0);
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memset (buf, 0, sizeof (glibtop_proc_time));
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if (proc_stat_to_buffer (buffer, pid))
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return;
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p = proc_stat_after_cmd (buffer);
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if (!p) return;
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p = skip_multiple_token (p, 11);
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/* clock_t (1/100 s) */
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buf->utime = strtoull (p, &p, 0);
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buf->stime = strtoull (p, &p, 0);
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buf->rtime = buf->utime + buf->stime;
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buf->cutime = strtoull (p, &p, 0);
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buf->cstime = strtoull (p, &p, 0);
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p = skip_multiple_token (p, 3);
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/* timeout is 0 on 2.4 and "thread_number" on 2.6
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lets skip it (using previous skip_multiple_token)
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buf->timeout = strtoull (p, &p, 0);
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*/
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buf->it_real_value = strtoull (p, &p, 0);
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/* seconds since epoch */
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{
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/* Linux provides start_time as clock_t representing
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the start of <pid> after boot_time.
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Let's use glibtop_get_uptime to get boot_time.
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But i'm not sure if this is safe
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See libgtop documentation.
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#ifdef __KERNEL__
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...
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*
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* Have the 32 bit jiffies value wrap 5 minutes after boot
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* so jiffies wrap bugs show up earlier.
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*
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#define INITIAL_JIFFIES ((unsigned long)(unsigned int) (-300*HZ))
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...
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#endif
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start_time may be incremented by INITIAL_JIFFIES, so start_time
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may be not be exact. You may also get wrong start_time if your
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system clock is not synchronised with you hardware clock.
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'man hwclock'
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*/
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glibtop_uptime up;
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glibtop_get_uptime_s(server, &up);
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buf->start_time = up.boot_time + strtoull (p, &p, 0) / 100;
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}
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buf->frequency = 100;
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buf->flags = _glibtop_sysdeps_proc_time;
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if (!server->ncpu)
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return;
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/* FIXME: doesn't work with 2.6 */
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if (proc_file_to_buffer (buffer, "/proc/%d/cpu", pid))
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return;
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p = skip_multiple_token (p, 3);
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for (i = 0; i < GLIBTOP_NCPU; i++) {
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if (strncmp (p+1, "cpu", 3) || !isdigit (p [4]))
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break;
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p += 6;
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buf->xcpu_utime [i] = strtoull (p, &p, 0);
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buf->xcpu_stime [i] = strtoull (p, &p, 0);
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}
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buf->flags |= _glibtop_sysdeps_proc_time_smp;
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}
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