| author |  xEgoist <egoist@egoistic.dev> 2023-04-12 18:22:07-05:00 |
| committer |  Andrew Kelley <andrew@ziglang.org> 2023-04-14 13:43:03-04:00 |
| log | 0733c8c5ca03f55fe8f65f74cea89dfccf6079b4 |
| tree | 1d941f7b9845f860304cfd4a9fd12be59e7b880a |
| parent | 7b908e173fa6034dc92e6b73c4264dc44706bd32 |
windows: replace GetPhysicallyInstalledSystemMemory with ntdll.
`GetPhysicallyInstalledSystemMemory` uses SMBios to grab the physical
memory size which can lead to unecessary allocation and inacurate
representation of the total memory. Using `System_Basic_Information`
help to retrieve the physical memory which is not reserved for the
kernel/tables. This aligns better with the linux side as `/proc/meminfo`
does the same thing.3 files changed, 47 insertions(+), 3 deletions(-)
lib- std
- os
- windows.zig
- windows
- process.zig
lib/std/os/windows.zig+28
| ... | ... | @@ -4476,6 +4476,34 @@ pub const MODULEENTRY32 = extern struct { |
| 4476 | 4476 | szExePath: [MAX_PATH]CHAR, |
| 4477 | 4477 | }; |
| 4478 | 4478 | |
| 4479 | pub const SYSTEM_INFORMATION_CLASS = enum(c_int) { | |
| 4480 | SystemBasicInformation = 0, | |
| 4481 | SystemPerformanceInformation = 2, | |
| 4482 | SystemTimeOfDayInformation = 3, | |
| 4483 | SystemProcessInformation = 5, | |
| 4484 | SystemProcessorPerformanceInformation = 8, | |
| 4485 | SystemInterruptInformation = 23, | |
| 4486 | SystemExceptionInformation = 33, | |
| 4487 | SystemRegistryQuotaInformation = 37, | |
| 4488 | SystemLookasideInformation = 45, | |
| 4489 | SystemCodeIntegrityInformation = 103, | |
| 4490 | SystemPolicyInformation = 134, | |
| 4491 | }; | |
| 4492 | ||
| 4493 | pub const SYSTEM_BASIC_INFORMATION = extern struct { | |
| 4494 | Reserved: ULONG, | |
| 4495 | TimerResolution: ULONG, | |
| 4496 | PageSize: ULONG, | |
| 4497 | NumberOfPhysicalPages: ULONG, | |
| 4498 | LowestPhysicalPageNumber: ULONG, | |
| 4499 | HighestPhysicalPageNumber: ULONG, | |
| 4500 | AllocationGranularity: ULONG, | |
| 4501 | MinimumUserModeAddress: ULONG_PTR, | |
| 4502 | MaximumUserModeAddress: ULONG_PTR, | |
| 4503 | ActiveProcessorsAffinityMask: KAFFINITY, | |
| 4504 | NumberOfProcessors: UCHAR, | |
| 4505 | }; | |
| 4506 | ||
| 4479 | 4507 | pub const THREADINFOCLASS = enum(c_int) { |
| 4480 | 4508 | ThreadBasicInformation, |
| 4481 | 4509 | ThreadTimes, |
lib/std/os/windows/ntdll.zig+9
| ... | ... | @@ -31,6 +31,7 @@ const UNWIND_HISTORY_TABLE = windows.UNWIND_HISTORY_TABLE; |
| 31 | 31 | const RUNTIME_FUNCTION = windows.RUNTIME_FUNCTION; |
| 32 | 32 | const KNONVOLATILE_CONTEXT_POINTERS = windows.KNONVOLATILE_CONTEXT_POINTERS; |
| 33 | 33 | const EXCEPTION_ROUTINE = windows.EXCEPTION_ROUTINE; |
| 34 | const SYSTEM_INFORMATION_CLASS = windows.SYSTEM_INFORMATION_CLASS; | |
| 34 | 35 | const THREADINFOCLASS = windows.THREADINFOCLASS; |
| 35 | 36 | const PROCESSINFOCLASS = windows.PROCESSINFOCLASS; |
| 36 | 37 | const LPVOID = windows.LPVOID; |
| ... | ... | @@ -51,6 +52,14 @@ pub extern "ntdll" fn NtQueryInformationThread( |
| 51 | 52 | ThreadInformationLength: ULONG, |
| 52 | 53 | ReturnLength: ?*ULONG, |
| 53 | 54 | ) callconv(WINAPI) NTSTATUS; |
| 55 | ||
| 56 | pub extern "ntdll" fn NtQuerySystemInformation( | |
| 57 | SystemInformationClass: SYSTEM_INFORMATION_CLASS, | |
| 58 | SystemInformation: PVOID, | |
| 59 | SystemInformationLength: ULONG, | |
| 60 | ReturnLength: ?*ULONG, | |
| 61 | ) callconv(WINAPI) NTSTATUS; | |
| 62 | ||
| 54 | 63 | pub extern "ntdll" fn NtSetInformationThread( |
| 55 | 64 | ThreadHandle: HANDLE, |
| 56 | 65 | ThreadInformationClass: THREADINFOCLASS, |
lib/std/process.zig+10-3
| ... | ... | @@ -1163,10 +1163,17 @@ pub fn totalSystemMemory() TotalSystemMemoryError!usize { |
| 1163 | 1163 | return totalSystemMemoryLinux() catch return error.UnknownTotalSystemMemory; |
| 1164 | 1164 | }, |
| 1165 | 1165 | .windows => { |
| 1166 | var kilobytes: std.os.windows.ULONGLONG = undefined; | |
| 1167 | if (std.os.windows.kernel32.GetPhysicallyInstalledSystemMemory(&kilobytes) != std.os.windows.TRUE) | |
| 1166 | var sbi: std.os.windows.SYSTEM_BASIC_INFORMATION = undefined; | |
| 1167 | const rc = std.os.windows.ntdll.NtQuerySystemInformation( | |
| 1168 | .SystemBasicInformation, | |
| 1169 | &sbi, | |
| 1170 | @sizeOf(std.os.windows.SYSTEM_BASIC_INFORMATION), | |
| 1171 | null, | |
| 1172 | ); | |
| 1173 | if (rc != .SUCCESS) { | |
| 1168 | 1174 | return error.UnknownTotalSystemMemory; |
| 1169 | return kilobytes * 1024; | |
| 1175 | } | |
| 1176 | return @as(usize, sbi.NumberOfPhysicalPages) * sbi.PageSize; | |
| 1170 | 1177 | }, |
| 1171 | 1178 | else => return error.UnknownTotalSystemMemory, |
| 1172 | 1179 | } |