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
|
/*
* Copyright (c) 2009, Giampaolo Rodola', Landry Breuil.
* 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/sysctl.h>
#include <sys/vmmeter.h>
#include <sys/mount.h>
#include <sys/swap.h>
#include <sys/param.h>
#include "../../_psutil_posix.h"
PyObject *
psutil_virtual_mem(PyObject *self, PyObject *args) {
int64_t total_physmem;
int uvmexp_mib[] = {CTL_VM, VM_UVMEXP};
int bcstats_mib[] = {CTL_VFS, VFS_GENERIC, VFS_BCACHESTAT};
int physmem_mib[] = {CTL_HW, HW_PHYSMEM64};
int vmmeter_mib[] = {CTL_VM, VM_METER};
size_t size;
struct uvmexp uvmexp;
struct bcachestats bcstats;
struct vmtotal vmdata;
long pagesize = psutil_getpagesize();
size = sizeof(total_physmem);
if (sysctl(physmem_mib, 2, &total_physmem, &size, NULL, 0) < 0) {
PyErr_SetFromErrno(PyExc_OSError);
return NULL;
}
size = sizeof(uvmexp);
if (sysctl(uvmexp_mib, 2, &uvmexp, &size, NULL, 0) < 0) {
PyErr_SetFromErrno(PyExc_OSError);
return NULL;
}
size = sizeof(bcstats);
if (sysctl(bcstats_mib, 3, &bcstats, &size, NULL, 0) < 0) {
PyErr_SetFromErrno(PyExc_OSError);
return NULL;
}
size = sizeof(vmdata);
if (sysctl(vmmeter_mib, 2, &vmdata, &size, NULL, 0) < 0) {
PyErr_SetFromErrno(PyExc_OSError);
return NULL;
}
return Py_BuildValue("KKKKKKKK",
// Note: many programs calculate total memory as
// "uvmexp.npages * pagesize" but this is incorrect and does not
// match "sysctl | grep hw.physmem".
(unsigned long long) total_physmem,
(unsigned long long) uvmexp.free * pagesize,
(unsigned long long) uvmexp.active * pagesize,
(unsigned long long) uvmexp.inactive * pagesize,
(unsigned long long) uvmexp.wired * pagesize,
// this is how "top" determines it
(unsigned long long) bcstats.numbufpages * pagesize, // cached
(unsigned long long) 0, // buffers
(unsigned long long) vmdata.t_vmshr + vmdata.t_rmshr // shared
);
}
PyObject *
psutil_swap_mem(PyObject *self, PyObject *args) {
uint64_t swap_total, swap_free;
struct swapent *swdev;
int nswap, i;
if ((nswap = swapctl(SWAP_NSWAP, 0, 0)) == 0) {
PyErr_SetFromErrno(PyExc_OSError);
return NULL;
}
if ((swdev = calloc(nswap, sizeof(*swdev))) == NULL) {
PyErr_NoMemory();
return NULL;
}
if (swapctl(SWAP_STATS, swdev, nswap) == -1) {
PyErr_SetFromErrno(PyExc_OSError);
goto error;
}
// Total things up.
swap_total = swap_free = 0;
for (i = 0; i < nswap; i++) {
if (swdev[i].se_flags & SWF_ENABLE) {
swap_free += (swdev[i].se_nblks - swdev[i].se_inuse);
swap_total += swdev[i].se_nblks;
}
}
free(swdev);
return Py_BuildValue(
"(LLLII)",
swap_total * DEV_BSIZE,
(swap_total - swap_free) * DEV_BSIZE,
swap_free * DEV_BSIZE,
// swap in / swap out is not supported as the
// swapent struct does not provide any info
// about it.
0,
0
);
error:
free(swdev);
return NULL;
}
|
