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check for running in a threadpool to disable page reclaim

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daanx 2024-12-07 17:11:11 -08:00
parent d0c86f3f0e
commit c33de86da3
12 changed files with 80 additions and 47 deletions
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25
src/prim/windows/prim.c
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@ -17,6 +17,9 @@ terms of the MIT license. A copy of the license can be found in the file
// Dynamically bind Windows API points for portability
//---------------------------------------------
static DWORD win_major_version = 6;
static DWORD win_minor_version = 0;
// We use VirtualAlloc2 for aligned allocation, but it is only supported on Windows 10 and Windows Server 2016.
// So, we need to look it up dynamically to run on older systems. (use __stdcall for 32-bit compatibility)
// NtAllocateVirtualAllocEx is used for huge OS page allocation (1GiB)
@ -115,6 +118,10 @@ void _mi_prim_mem_init( mi_os_mem_config_t* config )
config->has_overcommit = false;
config->has_partial_free = false;
config->has_virtual_reserve = true;
// windows version
const DWORD win_version = GetVersion();
win_major_version = (DWORD)(LOBYTE(LOWORD(win_version)));
win_minor_version = (DWORD)(HIBYTE(LOWORD(win_version)));
// get the page size
SYSTEM_INFO si;
GetSystemInfo(&si);
@ -134,7 +141,7 @@ void _mi_prim_mem_init( mi_os_mem_config_t* config )
if (memInKiB > 0 && memInKiB < (SIZE_MAX / MI_KiB)) {
config->physical_memory = (size_t)(memInKiB * MI_KiB);
}
}
}
// get the VirtualAlloc2 function
HINSTANCE hDll;
hDll = LoadLibrary(TEXT("kernelbase.dll"));
@ -809,4 +816,18 @@ static void NTAPI mi_win_main(PVOID module, DWORD reason, LPVOID reserved) {
void _mi_allocator_done(void) {
mi_allocator_done();
}
#endif
#endif
bool _mi_prim_thread_is_in_threadpool(void) {
#if (MI_ARCH_X64 || MI_ARCH_X86)
if (win_major_version >= 6) {
// check if this thread belongs to a windows threadpool
// see: <https://www.geoffchappell.com/studies/windows/km/ntoskrnl/inc/api/pebteb/teb/index.htm>
_TEB* const teb = NtCurrentTeb();
void* const pool_data = *((void**)((uint8_t*)teb + (MI_SIZE_BITS == 32 ? 0x0F90 : 0x1778)));
return (pool_data != NULL);
}
#endif
return false;
}