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/*
* Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include <Python.h>
#include <sys/sysinfo.h>
#include <kstat.h>
#include "../../arch/all/init.h"
// System-wide CPU times.
PyObject *
psutil_per_cpu_times(PyObject *self, PyObject *args) {
kstat_ctl_t *kc;
kstat_t *ksp;
cpu_stat_t cs;
PyObject *py_retlist = PyList_New(0);
PyObject *py_cputime = NULL;
if (py_retlist == NULL)
return NULL;
kc = kstat_open();
if (kc == NULL) {
PyErr_SetFromErrno(PyExc_OSError);
goto error;
}
for (ksp = kc->kc_chain; ksp != NULL; ksp = ksp->ks_next) {
if (strcmp(ksp->ks_module, "cpu_stat") == 0) {
if (kstat_read(kc, ksp, &cs) == -1) {
PyErr_SetFromErrno(PyExc_OSError);
goto error;
}
py_cputime = Py_BuildValue("ffff",
(float)cs.cpu_sysinfo.cpu[CPU_USER],
(float)cs.cpu_sysinfo.cpu[CPU_KERNEL],
(float)cs.cpu_sysinfo.cpu[CPU_IDLE],
(float)cs.cpu_sysinfo.cpu[CPU_WAIT]);
if (py_cputime == NULL)
goto error;
if (PyList_Append(py_retlist, py_cputime))
goto error;
Py_CLEAR(py_cputime);
}
}
kstat_close(kc);
return py_retlist;
error:
Py_XDECREF(py_cputime);
Py_DECREF(py_retlist);
if (kc != NULL)
kstat_close(kc);
return NULL;
}
// Return the number of CPU cores on the system.
PyObject *
psutil_cpu_count_cores(PyObject *self, PyObject *args) {
kstat_ctl_t *kc;
kstat_t *ksp;
int ncpus = 0;
kc = kstat_open();
if (kc == NULL)
goto error;
ksp = kstat_lookup(kc, "cpu_info", -1, NULL);
if (ksp == NULL)
goto error;
for (ksp = kc->kc_chain; ksp; ksp = ksp->ks_next) {
if (strcmp(ksp->ks_module, "cpu_info") != 0)
continue;
if (kstat_read(kc, ksp, NULL) == -1)
goto error;
ncpus += 1;
}
kstat_close(kc);
if (ncpus > 0)
return Py_BuildValue("i", ncpus);
else
goto error;
error:
// mimic os.cpu_count()
if (kc != NULL)
kstat_close(kc);
Py_RETURN_NONE;
}
// Return CPU statistics.
PyObject *
psutil_cpu_stats(PyObject *self, PyObject *args) {
kstat_ctl_t *kc;
kstat_t *ksp;
cpu_stat_t cs;
unsigned int ctx_switches = 0;
unsigned int interrupts = 0;
unsigned int traps = 0;
unsigned int syscalls = 0;
kc = kstat_open();
if (kc == NULL) {
PyErr_SetFromErrno(PyExc_OSError);
goto error;
}
for (ksp = kc->kc_chain; ksp != NULL; ksp = ksp->ks_next) {
if (strcmp(ksp->ks_module, "cpu_stat") == 0) {
if (kstat_read(kc, ksp, &cs) == -1) {
PyErr_SetFromErrno(PyExc_OSError);
goto error;
}
// voluntary + involuntary
ctx_switches += cs.cpu_sysinfo.pswitch + cs.cpu_sysinfo.inv_swtch;
interrupts += cs.cpu_sysinfo.intr;
traps += cs.cpu_sysinfo.trap;
syscalls += cs.cpu_sysinfo.syscall;
}
}
kstat_close(kc);
return Py_BuildValue(
"IIII", ctx_switches, interrupts, syscalls, traps);
error:
if (kc != NULL)
kstat_close(kc);
return NULL;
}
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