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
|
/* Copyright (C) 2025 Wildfire Games.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "precompiled.h"
#include "lib/sysdep/os_cpu.h"
#include "lib/alignment.h"
#include "lib/bits.h"
#include "lib/config2.h"
#include "lib/module_init.h"
#if CONFIG2_VALGRIND
# include "valgrind.h"
#endif
#include <sys/param.h>
#include <sys/sysctl.h>
size_t os_cpu_NumProcessors()
{
static size_t numProcessors;
if(numProcessors == 0)
{
#if CONFIG2_VALGRIND
// Valgrind reports the number of real CPUs, but only emulates a single CPU.
// That causes problems when we expect all those CPUs to be distinct, so
// just pretend there's only one CPU
if (RUNNING_ON_VALGRIND)
numProcessors = 1;
else
#endif
{
long res = sysconf(_SC_NPROCESSORS_CONF);
ENSURE(res != -1);
numProcessors = (size_t)res;
}
}
return numProcessors;
}
uintptr_t os_cpu_ProcessorMask()
{
static uintptr_t processorMask;
if(!processorMask)
processorMask = bit_mask<uintptr_t>(os_cpu_NumProcessors());
return processorMask;
}
size_t os_cpu_PageSize()
{
static size_t pageSize;
if(!pageSize)
pageSize = (size_t)sysconf(_SC_PAGESIZE);
return pageSize;
}
size_t os_cpu_LargePageSize()
{
// assume they're unsupported.
return 0;
}
size_t os_cpu_QueryMemorySize()
{
size_t memorySize = 0;
size_t len = sizeof(memorySize);
// Argh, the API doesn't seem to be const-correct
/*const*/ int mib[2] = { CTL_HW, HW_PHYSMEM };
sysctl(mib, 2, &memorySize, &len, nullptr, 0);
memorySize /= MiB;
return memorySize;
}
size_t os_cpu_MemoryAvailable()
{
size_t memoryAvailable = 0;
size_t len = sizeof(memoryAvailable);
// Argh, the API doesn't seem to be const-correct
/*const*/ int mib[2] = { CTL_HW, HW_USERMEM };
sysctl(mib, 2, &memoryAvailable, &len, nullptr, 0);
memoryAvailable /= MiB;
return memoryAvailable;
}
uintptr_t os_cpu_SetThreadAffinityMask(uintptr_t /*processorMask*/)
{
// not yet implemented
return os_cpu_ProcessorMask();
}
Status os_cpu_CallByEachCPU(OsCpuCallback cb, uintptr_t cbData)
{
for(size_t processor = 0; processor < os_cpu_NumProcessors(); processor++)
{
const uintptr_t processorMask = uintptr_t(1) << processor;
os_cpu_SetThreadAffinityMask(processorMask);
cb(processor, cbData);
}
return INFO::OK;
}
|
