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cpu.c
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/**
* collectd - src/cpu.c
* Copyright (C) 2005-2010 Florian octo Forster
* Copyright (C) 2008 Oleg King
* Copyright (C) 2009 Simon Kuhnle
* Copyright (C) 2009 Manuel Sanmartin
*
* 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; only version 2 of the License is applicable.
*
* 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.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Authors:
* Florian octo Forster <octo at verplant.org>
* Oleg King <king2 at kaluga.ru>
* Simon Kuhnle <simon at blarzwurst.de>
* Manuel Sanmartin
**/
#include "collectd.h"
#include "common.h"
#include "plugin.h"
#ifdef HAVE_MACH_KERN_RETURN_H
# include <mach/kern_return.h>
#endif
#ifdef HAVE_MACH_MACH_INIT_H
# include <mach/mach_init.h>
#endif
#ifdef HAVE_MACH_HOST_PRIV_H
# include <mach/host_priv.h>
#endif
#if HAVE_MACH_MACH_ERROR_H
# include <mach/mach_error.h>
#endif
#ifdef HAVE_MACH_PROCESSOR_INFO_H
# include <mach/processor_info.h>
#endif
#ifdef HAVE_MACH_PROCESSOR_H
# include <mach/processor.h>
#endif
#ifdef HAVE_MACH_VM_MAP_H
# include <mach/vm_map.h>
#endif
#ifdef HAVE_LIBKSTAT
# include <sys/sysinfo.h>
#endif /* HAVE_LIBKSTAT */
#if (defined(HAVE_SYSCTL) && HAVE_SYSCTL) \
|| (defined(HAVE_SYSCTLBYNAME) && HAVE_SYSCTLBYNAME)
# ifdef HAVE_SYS_SYSCTL_H
# include <sys/sysctl.h>
# endif
# ifdef HAVE_SYS_DKSTAT_H
# include <sys/dkstat.h>
# endif
# if !defined(CP_USER) || !defined(CP_NICE) || !defined(CP_SYS) || !defined(CP_INTR) || !defined(CP_IDLE) || !defined(CPUSTATES)
# define CP_USER 0
# define CP_NICE 1
# define CP_SYS 2
# define CP_INTR 3
# define CP_IDLE 4
# define CPUSTATES 5
# endif
#endif /* HAVE_SYSCTL || HAVE_SYSCTLBYNAME */
#if HAVE_SYSCTL
# if defined(CTL_HW) && defined(HW_NCPU) \
&& defined(CTL_KERN) && defined(KERN_CPTIME) && defined(CPUSTATES)
# define CAN_USE_SYSCTL 1
# else
# define CAN_USE_SYSCTL 0
# endif
#else
# define CAN_USE_SYSCTL 0
#endif
#if HAVE_STATGRAB_H
# include <statgrab.h>
#endif
# ifdef HAVE_PERFSTAT
# include <sys/protosw.h>
# include <libperfstat.h>
# endif /* HAVE_PERFSTAT */
#if !PROCESSOR_CPU_LOAD_INFO && !KERNEL_LINUX && !HAVE_LIBKSTAT \
&& !CAN_USE_SYSCTL && !HAVE_SYSCTLBYNAME && !HAVE_LIBSTATGRAB && !HAVE_PERFSTAT
# error "No applicable input method."
#endif
#ifdef PROCESSOR_CPU_LOAD_INFO
static mach_port_t port_host;
static processor_port_array_t cpu_list;
static mach_msg_type_number_t cpu_list_len;
/* #endif PROCESSOR_CPU_LOAD_INFO */
#elif defined(KERNEL_LINUX)
/* no variables needed */
/* #endif KERNEL_LINUX */
#elif defined(HAVE_LIBKSTAT)
/* colleague tells me that Sun doesn't sell systems with more than 100 or so CPUs.. */
# define MAX_NUMCPU 256
extern kstat_ctl_t *kc;
static kstat_t *ksp[MAX_NUMCPU];
static int numcpu;
/* #endif HAVE_LIBKSTAT */
#elif CAN_USE_SYSCTL
static int numcpu;
/* #endif CAN_USE_SYSCTL */
#elif defined(HAVE_SYSCTLBYNAME)
static int numcpu;
# ifdef HAVE_SYSCTL_KERN_CP_TIMES
static int maxcpu;
# endif /* HAVE_SYSCTL_KERN_CP_TIMES */
/* #endif HAVE_SYSCTLBYNAME */
#elif defined(HAVE_LIBSTATGRAB)
/* no variables needed */
/* #endif HAVE_LIBSTATGRAB */
#elif defined(HAVE_PERFSTAT)
static perfstat_cpu_t *perfcpu;
static int numcpu;
static int pnumcpu;
#endif /* HAVE_PERFSTAT */
static int init (void)
{
#if PROCESSOR_CPU_LOAD_INFO
kern_return_t status;
port_host = mach_host_self ();
/* FIXME: Free `cpu_list' if it's not NULL */
if ((status = host_processors (port_host, &cpu_list, &cpu_list_len)) != KERN_SUCCESS)
{
ERROR ("cpu plugin: host_processors returned %i", (int) status);
cpu_list_len = 0;
return (-1);
}
DEBUG ("host_processors returned %i %s", (int) cpu_list_len, cpu_list_len == 1 ? "processor" : "processors");
INFO ("cpu plugin: Found %i processor%s.", (int) cpu_list_len, cpu_list_len == 1 ? "" : "s");
/* #endif PROCESSOR_CPU_LOAD_INFO */
#elif defined(HAVE_LIBKSTAT)
kstat_t *ksp_chain;
numcpu = 0;
if (kc == NULL)
return (-1);
/* Solaris doesn't count linear.. *sigh* */
for (numcpu = 0, ksp_chain = kc->kc_chain;
(numcpu < MAX_NUMCPU) && (ksp_chain != NULL);
ksp_chain = ksp_chain->ks_next)
if (strncmp (ksp_chain->ks_module, "cpu_stat", 8) == 0)
ksp[numcpu++] = ksp_chain;
/* #endif HAVE_LIBKSTAT */
#elif CAN_USE_SYSCTL
size_t numcpu_size;
int mib[2] = {CTL_HW, HW_NCPU};
int status;
numcpu = 0;
numcpu_size = sizeof (numcpu);
status = sysctl (mib, STATIC_ARRAY_SIZE (mib),
&numcpu, &numcpu_size, NULL, 0);
if (status == -1)
{
char errbuf[1024];
WARNING ("cpu plugin: sysctl: %s",
sstrerror (errno, errbuf, sizeof (errbuf)));
return (-1);
}
/* #endif CAN_USE_SYSCTL */
#elif defined (HAVE_SYSCTLBYNAME)
size_t numcpu_size;
numcpu_size = sizeof (numcpu);
if (sysctlbyname ("hw.ncpu", &numcpu, &numcpu_size, NULL, 0) < 0)
{
char errbuf[1024];
WARNING ("cpu plugin: sysctlbyname(hw.ncpu): %s",
sstrerror (errno, errbuf, sizeof (errbuf)));
return (-1);
}
#ifdef HAVE_SYSCTL_KERN_CP_TIMES
numcpu_size = sizeof (maxcpu);
if (sysctlbyname("kern.smp.maxcpus", &maxcpu, &numcpu_size, NULL, 0) < 0)
{
char errbuf[1024];
WARNING ("cpu plugin: sysctlbyname(kern.smp.maxcpus): %s",
sstrerror (errno, errbuf, sizeof (errbuf)));
return (-1);
}
#else
if (numcpu != 1)
NOTICE ("cpu: Only one processor supported when using `sysctlbyname' (found %i)", numcpu);
#endif
/* #endif HAVE_SYSCTLBYNAME */
#elif defined(HAVE_LIBSTATGRAB)
/* nothing to initialize */
/* #endif HAVE_LIBSTATGRAB */
#elif defined(HAVE_PERFSTAT)
/* nothing to initialize */
#endif /* HAVE_PERFSTAT */
return (0);
} /* int init */
static void submit (int cpu_num, const char *type_instance, derive_t value)
{
value_t values[1];
value_list_t vl = VALUE_LIST_INIT;
values[0].derive = value;
vl.values = values;
vl.values_len = 1;
sstrncpy (vl.host, hostname_g, sizeof (vl.host));
sstrncpy (vl.plugin, "cpu", sizeof (vl.plugin));
ssnprintf (vl.plugin_instance, sizeof (vl.plugin_instance),
"%i", cpu_num);
sstrncpy (vl.type, "cpu", sizeof (vl.type));
sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
plugin_dispatch_values (&vl);
}
static int cpu_read (void)
{
#if PROCESSOR_CPU_LOAD_INFO
int cpu;
kern_return_t status;
processor_cpu_load_info_data_t cpu_info;
mach_msg_type_number_t cpu_info_len;
host_t cpu_host;
for (cpu = 0; cpu < cpu_list_len; cpu++)
{
cpu_host = 0;
cpu_info_len = PROCESSOR_BASIC_INFO_COUNT;
status = processor_info (cpu_list[cpu], PROCESSOR_CPU_LOAD_INFO, &cpu_host,
(processor_info_t) &cpu_info, &cpu_info_len);
if (status != KERN_SUCCESS)
{
ERROR ("cpu plugin: processor_info (PROCESSOR_CPU_LOAD_INFO) failed: %s",
mach_error_string (status));
continue;
}
if (cpu_info_len < CPU_STATE_MAX)
{
ERROR ("cpu plugin: processor_info returned only %i elements..", cpu_info_len);
continue;
}
submit (cpu, "user", (derive_t) cpu_info.cpu_ticks[CPU_STATE_USER]);
submit (cpu, "nice", (derive_t) cpu_info.cpu_ticks[CPU_STATE_NICE]);
submit (cpu, "system", (derive_t) cpu_info.cpu_ticks[CPU_STATE_SYSTEM]);
submit (cpu, "idle", (derive_t) cpu_info.cpu_ticks[CPU_STATE_IDLE]);
}
/* #endif PROCESSOR_CPU_LOAD_INFO */
#elif defined(KERNEL_LINUX)
int cpu;
derive_t user, nice, syst, idle;
derive_t wait, intr, sitr; /* sitr == soft interrupt */
FILE *fh;
char buf[1024];
char *fields[9];
int numfields;
if ((fh = fopen ("/proc/stat", "r")) == NULL)
{
char errbuf[1024];
ERROR ("cpu plugin: fopen (/proc/stat) failed: %s",
sstrerror (errno, errbuf, sizeof (errbuf)));
return (-1);
}
while (fgets (buf, 1024, fh) != NULL)
{
if (strncmp (buf, "cpu", 3))
continue;
if ((buf[3] < '0') || (buf[3] > '9'))
continue;
numfields = strsplit (buf, fields, 9);
if (numfields < 5)
continue;
cpu = atoi (fields[0] + 3);
user = atoll (fields[1]);
nice = atoll (fields[2]);
syst = atoll (fields[3]);
idle = atoll (fields[4]);
submit (cpu, "user", user);
submit (cpu, "nice", nice);
submit (cpu, "system", syst);
submit (cpu, "idle", idle);
if (numfields >= 8)
{
wait = atoll (fields[5]);
intr = atoll (fields[6]);
sitr = atoll (fields[7]);
submit (cpu, "wait", wait);
submit (cpu, "interrupt", intr);
submit (cpu, "softirq", sitr);
if (numfields >= 9)
submit (cpu, "steal", atoll (fields[8]));
}
}
fclose (fh);
/* #endif defined(KERNEL_LINUX) */
#elif defined(HAVE_LIBKSTAT)
int cpu;
derive_t user, syst, idle, wait;
static cpu_stat_t cs;
if (kc == NULL)
return (-1);
for (cpu = 0; cpu < numcpu; cpu++)
{
if (kstat_read (kc, ksp[cpu], &cs) == -1)
continue; /* error message? */
idle = (derive_t) cs.cpu_sysinfo.cpu[CPU_IDLE];
user = (derive_t) cs.cpu_sysinfo.cpu[CPU_USER];
syst = (derive_t) cs.cpu_sysinfo.cpu[CPU_KERNEL];
wait = (derive_t) cs.cpu_sysinfo.cpu[CPU_WAIT];
submit (ksp[cpu]->ks_instance, "user", user);
submit (ksp[cpu]->ks_instance, "system", syst);
submit (ksp[cpu]->ks_instance, "idle", idle);
submit (ksp[cpu]->ks_instance, "wait", wait);
}
/* #endif defined(HAVE_LIBKSTAT) */
#elif CAN_USE_SYSCTL
uint64_t cpuinfo[numcpu][CPUSTATES];
size_t cpuinfo_size;
int status;
int i;
if (numcpu < 1)
{
ERROR ("cpu plugin: Could not determine number of "
"installed CPUs using sysctl(3).");
return (-1);
}
memset (cpuinfo, 0, sizeof (cpuinfo));
#if defined(KERN_CPTIME2)
if (numcpu > 1) {
for (i = 0; i < numcpu; i++) {
int mib[] = {CTL_KERN, KERN_CPTIME2, i};
cpuinfo_size = sizeof (cpuinfo[0]);
status = sysctl (mib, STATIC_ARRAY_SIZE (mib),
cpuinfo[i], &cpuinfo_size, NULL, 0);
if (status == -1) {
char errbuf[1024];
ERROR ("cpu plugin: sysctl failed: %s.",
sstrerror (errno, errbuf, sizeof (errbuf)));
return (-1);
}
}
}
else
#endif /* defined(KERN_CPTIME2) */
{
int mib[] = {CTL_KERN, KERN_CPTIME};
long cpuinfo_tmp[CPUSTATES];
cpuinfo_size = sizeof(cpuinfo_tmp);
status = sysctl (mib, STATIC_ARRAY_SIZE (mib),
&cpuinfo_tmp, &cpuinfo_size, NULL, 0);
if (status == -1)
{
char errbuf[1024];
ERROR ("cpu plugin: sysctl failed: %s.",
sstrerror (errno, errbuf, sizeof (errbuf)));
return (-1);
}
for(i = 0; i < CPUSTATES; i++) {
cpuinfo[0][i] = cpuinfo_tmp[i];
}
}
for (i = 0; i < numcpu; i++) {
submit (i, "user", cpuinfo[i][CP_USER]);
submit (i, "nice", cpuinfo[i][CP_NICE]);
submit (i, "system", cpuinfo[i][CP_SYS]);
submit (i, "idle", cpuinfo[i][CP_IDLE]);
submit (i, "interrupt", cpuinfo[i][CP_INTR]);
}
/* #endif CAN_USE_SYSCTL */
#elif defined(HAVE_SYSCTLBYNAME) && defined(HAVE_SYSCTL_KERN_CP_TIMES)
long cpuinfo[maxcpu][CPUSTATES];
size_t cpuinfo_size;
int i;
memset (cpuinfo, 0, sizeof (cpuinfo));
cpuinfo_size = sizeof (cpuinfo);
if (sysctlbyname("kern.cp_times", &cpuinfo, &cpuinfo_size, NULL, 0) < 0)
{
char errbuf[1024];
ERROR ("cpu plugin: sysctlbyname failed: %s.",
sstrerror (errno, errbuf, sizeof (errbuf)));
return (-1);
}
for (i = 0; i < numcpu; i++) {
submit (i, "user", cpuinfo[i][CP_USER]);
submit (i, "nice", cpuinfo[i][CP_NICE]);
submit (i, "system", cpuinfo[i][CP_SYS]);
submit (i, "idle", cpuinfo[i][CP_IDLE]);
submit (i, "interrupt", cpuinfo[i][CP_INTR]);
}
/* #endif HAVE_SYSCTL_KERN_CP_TIMES */
#elif defined(HAVE_SYSCTLBYNAME)
long cpuinfo[CPUSTATES];
size_t cpuinfo_size;
cpuinfo_size = sizeof (cpuinfo);
if (sysctlbyname("kern.cp_time", &cpuinfo, &cpuinfo_size, NULL, 0) < 0)
{
char errbuf[1024];
ERROR ("cpu plugin: sysctlbyname failed: %s.",
sstrerror (errno, errbuf, sizeof (errbuf)));
return (-1);
}
submit (0, "user", cpuinfo[CP_USER]);
submit (0, "nice", cpuinfo[CP_NICE]);
submit (0, "system", cpuinfo[CP_SYS]);
submit (0, "idle", cpuinfo[CP_IDLE]);
submit (0, "interrupt", cpuinfo[CP_INTR]);
/* #endif HAVE_SYSCTLBYNAME */
#elif defined(HAVE_LIBSTATGRAB)
sg_cpu_stats *cs;
cs = sg_get_cpu_stats ();
if (cs == NULL)
{
ERROR ("cpu plugin: sg_get_cpu_stats failed.");
return (-1);
}
submit (0, "idle", (derive_t) cs->idle);
submit (0, "nice", (derive_t) cs->nice);
submit (0, "swap", (derive_t) cs->swap);
submit (0, "system", (derive_t) cs->kernel);
submit (0, "user", (derive_t) cs->user);
submit (0, "wait", (derive_t) cs->iowait);
/* #endif HAVE_LIBSTATGRAB */
#elif defined(HAVE_PERFSTAT)
perfstat_id_t id;
int i, cpus;
numcpu = perfstat_cpu(NULL, NULL, sizeof(perfstat_cpu_t), 0);
if(numcpu == -1)
{
char errbuf[1024];
WARNING ("cpu plugin: perfstat_cpu: %s",
sstrerror (errno, errbuf, sizeof (errbuf)));
return (-1);
}
if (pnumcpu != numcpu || perfcpu == NULL)
{
if (perfcpu != NULL)
free(perfcpu);
perfcpu = malloc(numcpu * sizeof(perfstat_cpu_t));
}
pnumcpu = numcpu;
id.name[0] = '\0';
if ((cpus = perfstat_cpu(&id, perfcpu, sizeof(perfstat_cpu_t), numcpu)) < 0)
{
char errbuf[1024];
WARNING ("cpu plugin: perfstat_cpu: %s",
sstrerror (errno, errbuf, sizeof (errbuf)));
return (-1);
}
for (i = 0; i < cpus; i++)
{
submit (i, "idle", (derive_t) perfcpu[i].idle);
submit (i, "system", (derive_t) perfcpu[i].sys);
submit (i, "user", (derive_t) perfcpu[i].user);
submit (i, "wait", (derive_t) perfcpu[i].wait);
}
#endif /* HAVE_PERFSTAT */
return (0);
}
void module_register (void)
{
plugin_register_init ("cpu", init);
plugin_register_read ("cpu", cpu_read);
} /* void module_register */