blob: a56ef2f11ac4da33e52c27754c178cca3c6e6dc7 (
plain)
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
|
/* -*- mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
// vim: expandtab:ts=8:sw=4:softtabstop=4:
///////////////////////////////////////////////////////////////////////////////
//
/// \file hardware.c
/// \brief Detection of available hardware resources
//
// Author: Lasse Collin
//
// This file has been put into the public domain.
// You can do whatever you want with this file.
//
///////////////////////////////////////////////////////////////////////////////
#include "private.h"
#include "physmem.h"
#include "cpucores.h"
/// Maximum number of free *coder* threads. This can be set with
/// the --threads=NUM command line option.
static uint32_t threadlimit;
/// Memory usage limit
static uint64_t memlimit;
extern void
hardware_threadlimit_set(uint32_t new_threadlimit)
{
if (new_threadlimit == 0) {
// The default is the number of available CPU cores.
threadlimit = cpucores();
if (threadlimit == 0)
threadlimit = 1;
} else {
threadlimit = new_threadlimit;
}
return;
}
extern uint32_t
hardware_threadlimit_get(void)
{
return threadlimit;
}
extern void
hardware_memlimit_set(uint64_t new_memlimit)
{
if (new_memlimit == 0) {
// The default is 40 % of total installed physical RAM.
hardware_memlimit_set_percentage(40);
} else {
memlimit = new_memlimit;
}
return;
}
extern void
hardware_memlimit_set_percentage(uint32_t percentage)
{
assert(percentage > 0);
assert(percentage <= 100);
uint64_t mem = physmem();
// If we cannot determine the amount of RAM, assume 32 MiB. Maybe
// even that is too much on some systems. But on most systems it's
// far too little, and can be annoying.
if (mem == 0)
mem = UINT64_C(32) * 1024 * 1024;
memlimit = percentage * mem / 100;
return;
}
extern uint64_t
hardware_memlimit_get(void)
{
return memlimit;
}
extern void
hardware_init(void)
{
hardware_memlimit_set(0);
hardware_threadlimit_set(0);
return;
}
|
