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/*
* Copyright (c) 2009, Jay Loden, 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.
*/
/*
System-wide CPU related functions.
Original code was refactored and moved from psutil/arch/freebsd/specific.c
in 2020 (and was moved in there previously already) from cset.
a4c0a0eb0d2a872ab7a45e47fcf37ef1fde5b012
For reference, here's the git history with original(ish) implementations:
- CPU stats: fb0154ef164d0e5942ac85102ab660b8d2938fbb
- CPU freq: 459556dd1e2979cdee22177339ced0761caf4c83
- CPU cores: e0d6d7865df84dc9a1d123ae452fd311f79b1dde
*/
#include <Python.h>
#include <sys/sysctl.h>
#include "../../_psutil_common.h"
#include "../../_psutil_posix.h"
PyObject *
psutil_cpu_topology(PyObject *self, PyObject *args) {
void *topology = NULL;
size_t size = 0;
PyObject *py_str;
if (sysctlbyname("kern.sched.topology_spec", NULL, &size, NULL, 0))
goto error;
topology = malloc(size);
if (!topology) {
PyErr_NoMemory();
return NULL;
}
if (sysctlbyname("kern.sched.topology_spec", topology, &size, NULL, 0))
goto error;
py_str = Py_BuildValue("s", topology);
free(topology);
return py_str;
error:
if (topology != NULL)
free(topology);
Py_RETURN_NONE;
}
PyObject *
psutil_cpu_stats(PyObject *self, PyObject *args) {
unsigned int v_soft;
unsigned int v_intr;
unsigned int v_syscall;
unsigned int v_trap;
unsigned int v_swtch;
size_t size = sizeof(v_soft);
if (sysctlbyname("vm.stats.sys.v_soft", &v_soft, &size, NULL, 0)) {
return PyErr_SetFromOSErrnoWithSyscall(
"sysctlbyname('vm.stats.sys.v_soft')");
}
if (sysctlbyname("vm.stats.sys.v_intr", &v_intr, &size, NULL, 0)) {
return PyErr_SetFromOSErrnoWithSyscall(
"sysctlbyname('vm.stats.sys.v_intr')");
}
if (sysctlbyname("vm.stats.sys.v_syscall", &v_syscall, &size, NULL, 0)) {
return PyErr_SetFromOSErrnoWithSyscall(
"sysctlbyname('vm.stats.sys.v_syscall')");
}
if (sysctlbyname("vm.stats.sys.v_trap", &v_trap, &size, NULL, 0)) {
return PyErr_SetFromOSErrnoWithSyscall(
"sysctlbyname('vm.stats.sys.v_trap')");
}
if (sysctlbyname("vm.stats.sys.v_swtch", &v_swtch, &size, NULL, 0)) {
return PyErr_SetFromOSErrnoWithSyscall(
"sysctlbyname('vm.stats.sys.v_swtch')");
}
return Py_BuildValue(
"IIIII",
v_swtch, // ctx switches
v_intr, // interrupts
v_soft, // software interrupts
v_syscall, // syscalls
v_trap // traps
);
}
/*
* Return frequency information of a given CPU.
* As of Dec 2018 only CPU 0 appears to be supported and all other
* cores match the frequency of CPU 0.
*/
PyObject *
psutil_cpu_freq(PyObject *self, PyObject *args) {
int current;
int core;
char sensor[26];
char available_freq_levels[1000];
size_t size = sizeof(current);
if (! PyArg_ParseTuple(args, "i", &core))
return NULL;
// https://www.unix.com/man-page/FreeBSD/4/cpufreq/
sprintf(sensor, "dev.cpu.%d.freq", core);
if (sysctlbyname(sensor, ¤t, &size, NULL, 0))
goto error;
size = sizeof(available_freq_levels);
// https://www.unix.com/man-page/FreeBSD/4/cpufreq/
// In case of failure, an empty string is returned.
sprintf(sensor, "dev.cpu.%d.freq_levels", core);
sysctlbyname(sensor, &available_freq_levels, &size, NULL, 0);
return Py_BuildValue("is", current, available_freq_levels);
error:
if (errno == ENOENT)
PyErr_SetString(PyExc_NotImplementedError, "unable to read frequency");
else
PyErr_SetFromErrno(PyExc_OSError);
return NULL;
}
PyObject *
psutil_cpu_model(PyObject *self, PyObject *args) {
void *buf = NULL;
size_t size = 0;
PyObject *py_str;
if (sysctlbyname("hw.model", NULL, &size, NULL, 0)) {
psutil_debug("sysctlbyname('hw.model') 1/2 failed");
goto error;
}
buf = malloc(size);
if (!buf) {
PyErr_NoMemory();
return NULL;
}
if (sysctlbyname("hw.model", buf, &size, NULL, 0)) {
psutil_debug("sysctlbyname('hw.model') 2/2 failed");
goto error;
}
py_str = Py_BuildValue("s", buf);
free(buf);
return py_str;
error:
if (buf != NULL)
free(buf);
Py_RETURN_NONE;
}
PyObject *
psutil_cpu_vendor(PyObject *self, PyObject *args) {
char vendor[128];
size_t size = sizeof(vendor);
if (sysctlbyname("hw.hv_vendor", &vendor, &size, NULL, 0)) {
psutil_debug("sysctlbyname('hw.hv_vendor') failed");
Py_RETURN_NONE;
}
return Py_BuildValue("s", vendor);
}
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