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// Copyright Epic Games, Inc. All Rights Reserved.
#include "zencore/system.h"
#include <zencore/compactbinarybuilder.h>
#include <zencore/except.h>
#include <zencore/memory/memory.h>
#include <zencore/string.h>
#if ZEN_PLATFORM_WINDOWS
# include <zencore/windows.h>
ZEN_THIRD_PARTY_INCLUDES_START
# include <iphlpapi.h>
# include <winsock2.h>
ZEN_THIRD_PARTY_INCLUDES_END
#elif ZEN_PLATFORM_LINUX
# include <sys/utsname.h>
#elif ZEN_PLATFORM_MAC
# include <unistd.h>
#endif
namespace zen {
using namespace std::literals;
int g_FakeCpuCount = 0;
void
SetCpuCountForReporting(int FakeCpuCount)
{
g_FakeCpuCount = FakeCpuCount;
}
#if ZEN_PLATFORM_WINDOWS
std::string
GetMachineName()
{
WCHAR NameBuffer[256];
DWORD dwNameSize = 255;
BOOL Success = GetComputerNameW(NameBuffer, &dwNameSize);
if (Success)
{
return WideToUtf8(NameBuffer);
}
return {};
}
SystemMetrics
GetSystemMetrics()
{
SYSTEM_INFO SysInfo{};
GetSystemInfo(&SysInfo);
SystemMetrics Metrics;
Metrics.LogicalProcessorCount = SysInfo.dwNumberOfProcessors;
// Determine physical core count
DWORD BufferSize = 0;
BOOL Result = GetLogicalProcessorInformation(nullptr, &BufferSize);
if (int32_t Error = GetLastError(); Error != ERROR_INSUFFICIENT_BUFFER)
{
ThrowSystemError(Error, "Failed to get buffer size for logical processor information");
}
PSYSTEM_LOGICAL_PROCESSOR_INFORMATION Buffer = (PSYSTEM_LOGICAL_PROCESSOR_INFORMATION)Memory::Alloc(BufferSize);
Result = GetLogicalProcessorInformation(Buffer, &BufferSize);
if (!Result)
{
Memory::Free(Buffer);
throw std::runtime_error("Failed to get logical processor information");
}
DWORD ProcessorPkgCount = 0;
DWORD ProcessorCoreCount = 0;
DWORD ByteOffset = 0;
while (ByteOffset + sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION) <= BufferSize)
{
const SYSTEM_LOGICAL_PROCESSOR_INFORMATION& Slpi = Buffer[ByteOffset / sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION)];
if (Slpi.Relationship == RelationProcessorCore)
{
ProcessorCoreCount++;
}
else if (Slpi.Relationship == RelationProcessorPackage)
{
ProcessorPkgCount++;
}
ByteOffset += sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION);
}
Metrics.CoreCount = ProcessorCoreCount;
Metrics.CpuCount = ProcessorPkgCount;
Memory::Free(Buffer);
// Query memory status
MEMORYSTATUSEX MemStatus{.dwLength = sizeof(MEMORYSTATUSEX)};
GlobalMemoryStatusEx(&MemStatus);
Metrics.SystemMemoryMiB = MemStatus.ullTotalPhys / 1024 / 1024;
Metrics.AvailSystemMemoryMiB = MemStatus.ullAvailPhys / 1024 / 1024;
Metrics.VirtualMemoryMiB = MemStatus.ullTotalVirtual / 1024 / 1024;
Metrics.AvailVirtualMemoryMiB = MemStatus.ullAvailVirtual / 1024 / 1024;
Metrics.PageFileMiB = MemStatus.ullTotalPageFile / 1024 / 1024;
Metrics.AvailPageFileMiB = MemStatus.ullAvailPageFile / 1024 / 1024;
return Metrics;
}
#elif ZEN_PLATFORM_LINUX
std::string
GetMachineName()
{
static char Result[256] = "";
if (!Result[0])
{
struct utsname name;
const char* SysName = name.nodename;
if (uname(&name))
{
SysName = "Unix Computer";
}
strcpy(Result, SysName);
}
return Result;
}
SystemMetrics
GetSystemMetrics()
{
return {};
}
#elif ZEN_PLATFORM_MAC
std::string
GetMachineName()
{
static char Result[256] = "";
if (!Result[0])
{
gethostname(Result, sizeof(Result));
}
return Result;
}
SystemMetrics
GetSystemMetrics()
{
return {};
}
#else
# error "Unknown platform"
#endif
SystemMetrics
GetSystemMetricsForReporting()
{
SystemMetrics Sm = GetSystemMetrics();
if (g_FakeCpuCount)
{
Sm.CoreCount = g_FakeCpuCount;
Sm.LogicalProcessorCount = g_FakeCpuCount;
}
return Sm;
}
std::string_view
GetOperatingSystemName()
{
return ZEN_PLATFORM_NAME;
}
std::string_view
GetCpuName()
{
#if ZEN_ARCH_X64
return "x64"sv;
#elif ZEN_ARCH_ARM64
return "arm64"sv;
#endif
}
void
Describe(const SystemMetrics& Metrics, CbWriter& Writer)
{
Writer << "cpu_count" << Metrics.CpuCount << "core_count" << Metrics.CoreCount << "lp_count" << Metrics.LogicalProcessorCount
<< "total_memory_mb" << Metrics.SystemMemoryMiB << "avail_memory_mb" << Metrics.AvailSystemMemoryMiB << "total_virtual_mb"
<< Metrics.VirtualMemoryMiB << "avail_virtual_mb" << Metrics.AvailVirtualMemoryMiB << "total_pagefile_mb" << Metrics.PageFileMiB
<< "avail_pagefile_mb" << Metrics.AvailPageFileMiB;
}
} // namespace zen
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