1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
/*
* 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 <devstat.h>
#include "../../_psutil_common.h"
#include "../../_psutil_posix.h"
PyObject *
psutil_per_cpu_times(PyObject *self, PyObject *args) {
int maxcpus;
int mib[2];
int ncpu;
size_t len;
size_t size;
int i;
PyObject *py_retlist = PyList_New(0);
PyObject *py_cputime = NULL;
if (py_retlist == NULL)
return NULL;
// retrieve maxcpus value
size = sizeof(maxcpus);
if (sysctlbyname("kern.smp.maxcpus", &maxcpus, &size, NULL, 0) < 0) {
Py_DECREF(py_retlist);
return psutil_PyErr_SetFromOSErrnoWithSyscall(
"sysctlbyname('kern.smp.maxcpus')");
}
long cpu_time[maxcpus][CPUSTATES];
// retrieve the number of cpus
mib[0] = CTL_HW;
mib[1] = HW_NCPU;
len = sizeof(ncpu);
if (sysctl(mib, 2, &ncpu, &len, NULL, 0) == -1) {
psutil_PyErr_SetFromOSErrnoWithSyscall("sysctl(HW_NCPU)");
goto error;
}
// per-cpu info
size = sizeof(cpu_time);
if (sysctlbyname("kern.cp_times", &cpu_time, &size, NULL, 0) == -1) {
psutil_PyErr_SetFromOSErrnoWithSyscall(
"sysctlbyname('kern.smp.maxcpus')"
);
goto error;
}
for (i = 0; i < ncpu; i++) {
py_cputime = Py_BuildValue(
"(ddddd)",
(double)cpu_time[i][CP_USER] / CLOCKS_PER_SEC,
(double)cpu_time[i][CP_NICE] / CLOCKS_PER_SEC,
(double)cpu_time[i][CP_SYS] / CLOCKS_PER_SEC,
(double)cpu_time[i][CP_IDLE] / CLOCKS_PER_SEC,
(double)cpu_time[i][CP_INTR] / CLOCKS_PER_SEC);
if (!py_cputime)
goto error;
if (PyList_Append(py_retlist, py_cputime))
goto error;
Py_DECREF(py_cputime);
}
return py_retlist;
error:
Py_XDECREF(py_cputime);
Py_DECREF(py_retlist);
return NULL;
}
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 psutil_PyErr_SetFromOSErrnoWithSyscall(
"sysctlbyname('vm.stats.sys.v_soft')");
}
if (sysctlbyname("vm.stats.sys.v_intr", &v_intr, &size, NULL, 0)) {
return psutil_PyErr_SetFromOSErrnoWithSyscall(
"sysctlbyname('vm.stats.sys.v_intr')");
}
if (sysctlbyname("vm.stats.sys.v_syscall", &v_syscall, &size, NULL, 0)) {
return psutil_PyErr_SetFromOSErrnoWithSyscall(
"sysctlbyname('vm.stats.sys.v_syscall')");
}
if (sysctlbyname("vm.stats.sys.v_trap", &v_trap, &size, NULL, 0)) {
return psutil_PyErr_SetFromOSErrnoWithSyscall(
"sysctlbyname('vm.stats.sys.v_trap')");
}
if (sysctlbyname("vm.stats.sys.v_swtch", &v_swtch, &size, NULL, 0)) {
return psutil_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;
}
|
