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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., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include <config.h>
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#include <glibtop/error.h>
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#include <glibtop/cpu.h>
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#include "glibtop_private.h"
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static const unsigned long _glibtop_sysdeps_cpu =
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(1L << GLIBTOP_CPU_TOTAL) + (1L << GLIBTOP_CPU_USER) +
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(1L << GLIBTOP_CPU_NICE) + (1L << GLIBTOP_CPU_SYS) +
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(1L << GLIBTOP_CPU_IDLE) + (1L << GLIBTOP_CPU_FREQUENCY);
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static const unsigned long _glibtop_sysdeps_cpu_smp =
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(1L << GLIBTOP_XCPU_TOTAL) + (1L << GLIBTOP_XCPU_USER) +
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(1L << GLIBTOP_XCPU_NICE) + (1L << GLIBTOP_XCPU_SYS) +
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(1L << GLIBTOP_XCPU_IDLE);
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static const unsigned long _glibtop_sysdeps_cpu_2_6 =
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(1L << GLIBTOP_CPU_IOWAIT) + (1L << GLIBTOP_CPU_IRQ) +
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(1L << GLIBTOP_CPU_SOFTIRQ);
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static const unsigned long _glibtop_sysdeps_cpu_smp_2_6 =
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(1L << GLIBTOP_XCPU_IOWAIT) + (1L << GLIBTOP_XCPU_IRQ) +
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(1L << GLIBTOP_XCPU_SOFTIRQ);
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/* Init function. */
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void
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_glibtop_init_cpu_s (glibtop *server)
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{
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server->sysdeps.cpu = _glibtop_sysdeps_cpu;
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if (server->ncpu)
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server->sysdeps.cpu |= _glibtop_sysdeps_cpu_smp;
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if(server->os_version_code >= LINUX_VERSION_CODE(2, 6, 0))
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{
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server->sysdeps.cpu |= _glibtop_sysdeps_cpu_2_6;
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if (server->ncpu)
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server->sysdeps.cpu |= _glibtop_sysdeps_cpu_smp_2_6;
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}
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}
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/* Provides information about cpu usage. */
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#define FILENAME "/proc/stat"
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#define STAT_BUFSIZ 81920
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void
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glibtop_get_cpu_s (glibtop *server, glibtop_cpu *buf)
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{
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char buffer [STAT_BUFSIZ], *p;
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int i;
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memset (buf, 0, sizeof (glibtop_cpu));
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file_to_buffer(server, buffer, sizeof buffer, FILENAME);
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/*
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* GLOBAL
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*/
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p = skip_token (buffer); /* "cpu" */
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buf->user = strtoull (p, &p, 0);
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buf->nice = strtoull (p, &p, 0);
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buf->sys = strtoull (p, &p, 0);
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buf->idle = strtoull (p, &p, 0);
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buf->total = buf->user + buf->nice + buf->sys + buf->idle;
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/* 2.6 kernel */
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if(server->os_version_code >= LINUX_VERSION_CODE(2, 6, 0))
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{
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buf->iowait = strtoull(p, &p, 0);
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buf->irq = strtoull(p, &p, 0);
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buf->softirq = strtoull(p, &p, 0);
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buf->total += buf->iowait + buf->irq + buf->softirq;
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}
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buf->frequency = 100;
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buf->flags = _glibtop_sysdeps_cpu;
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/*
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* PER CPU
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*/
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for (i = 0; i <= server->ncpu; i++) {
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p = skip_line(p); /* move to ^ */
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if (!check_cpu_line_warn(server, p, i))
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break;
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p = skip_token(p); /* "cpuN" */
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buf->xcpu_user [i] = strtoull (p, &p, 0);
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buf->xcpu_nice [i] = strtoull (p, &p, 0);
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buf->xcpu_sys [i] = strtoull (p, &p, 0);
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buf->xcpu_idle [i] = strtoull (p, &p, 0);
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buf->xcpu_total[i] = buf->xcpu_user [i] \
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+ buf->xcpu_nice [i] \
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+ buf->xcpu_sys [i] \
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+ buf->xcpu_idle [i];
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/* 2.6 kernel */
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if(server->os_version_code >= LINUX_VERSION_CODE(2, 6, 0))
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{
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buf->xcpu_iowait [i] = strtoull(p, &p, 0);
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buf->xcpu_irq [i] = strtoull(p, &p, 0);
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buf->xcpu_softirq [i] = strtoull(p, &p, 0);
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buf->xcpu_total [i] += buf->xcpu_iowait [i] \
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+ buf->xcpu_irq [i] \
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+ buf->xcpu_softirq [i];
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}
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}
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if(server->ncpu) /* ok, that's a real SMP */
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buf->flags |= _glibtop_sysdeps_cpu_smp;
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if(server->os_version_code >= LINUX_VERSION_CODE(2, 6, 0))
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{
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buf->flags |= _glibtop_sysdeps_cpu_2_6;
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if(server->ncpu) /* ok, that's a real SMP */
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buf->flags |= _glibtop_sysdeps_cpu_smp_2_6;
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}
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}
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