v29.4-roots.3 · Commit 2: [PATCH 02/30] runtime: preserve shared operator controls
src/util/mempressure.cpp
Before: /dev/null · After: src/util/mempressure.cpp
File metadata
new file mode 100644 index 0000000000000000000000000000000000000000..c6d624409cf5dfccdac07078d9b135bb47da9a6c
Download original patch · Release notes
Diff rows 1–56 of 56. Line numbers refer to the original before/after files.
+ Added− RemovedUnmarked lines are context.
Scroll the code area horizontally to read long lines. The two line-number columns refer to before and after.
src/util/mempressure.cpp
ADDED
|
@@ -0,0 +1,56 @@
|
|
|
1
|
+
// Copyright (c) 2023-present The Bitcoin Roots developers
|
|
2
|
+
// Distributed under the MIT software license, see the accompanying
|
|
3
|
+
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
4
|
+
|
|
5
|
+
#include <bitcoin-build-config.h> // IWYU pragma: keep
|
|
6
|
+
|
|
7
|
+
#include <util/mempressure.h>
|
|
8
|
+
|
|
9
|
+
#include <logging.h>
|
|
10
|
+
#include <util/byte_units.h>
|
|
11
|
+
|
|
12
|
+
#ifdef HAVE_LINUX_SYSINFO
|
|
13
|
+
#include <sys/sysinfo.h>
|
|
14
|
+
#endif
|
|
15
|
+
#ifdef WIN32
|
|
16
|
+
#include <windows.h>
|
|
17
|
+
#endif
|
|
18
|
+
|
|
19
|
+
#include <cstddef>
|
|
20
|
+
#include <cstdint>
|
|
21
|
+
|
|
22
|
+
size_t g_low_memory_threshold{0};
|
|
23
|
+
|
|
24
|
+
bool SystemNeedsMemoryReleased()
|
|
25
|
+
{
|
|
26
|
+
if (g_low_memory_threshold <= 0) {
|
|
27
|
+
// Intentionally bypass other metrics when disabled entirely
|
|
28
|
+
return false;
|
|
29
|
+
}
|
|
30
|
+
#ifdef WIN32
|
|
31
|
+
MEMORYSTATUSEX mem_status;
|
|
32
|
+
mem_status.dwLength = sizeof(mem_status);
|
|
33
|
+
if (GlobalMemoryStatusEx(&mem_status)) {
|
|
34
|
+
if (mem_status.dwMemoryLoad >= 99 ||
|
|
35
|
+
mem_status.ullAvailPhys < g_low_memory_threshold ||
|
|
36
|
+
mem_status.ullAvailVirtual < g_low_memory_threshold) {
|
|
37
|
+
LogPrintf("%s: YES: %s%% memory load; %s available physical memory; %s available virtual memory\n", __func__, int(mem_status.dwMemoryLoad), size_t(mem_status.ullAvailPhys), size_t(mem_status.ullAvailVirtual));
|
|
38
|
+
return true;
|
|
39
|
+
}
|
|
40
|
+
}
|
|
41
|
+
#endif
|
|
42
|
+
#ifdef HAVE_LINUX_SYSINFO
|
|
43
|
+
struct sysinfo sys_info;
|
|
44
|
+
if (!sysinfo(&sys_info)) {
|
|
45
|
+
// Explicitly 64-bit in case of 32-bit userspace on 64-bit kernel
|
|
46
|
+
const uint64_t free_ram = uint64_t(sys_info.freeram) * sys_info.mem_unit;
|
|
47
|
+
const uint64_t buffer_ram = uint64_t(sys_info.bufferram) * sys_info.mem_unit;
|
|
48
|
+
if (free_ram + buffer_ram < g_low_memory_threshold) {
|
|
49
|
+
LogPrintf("%s: YES: %s free RAM + %s buffer RAM\n", __func__, free_ram, buffer_ram);
|
|
50
|
+
return true;
|
|
51
|
+
}
|
|
52
|
+
}
|
|
53
|
+
#endif
|
|
54
|
+
// NOTE: sysconf(_SC_AVPHYS_PAGES) doesn't account for caches on at least Linux, so not safe to use here
|
|
55
|
+
return false;
|
|
56
|
+
}
|