NtRequestWakeupLatency
Other → NTSTATUS
NtRequestWakeupLatency is a Windows NT kernel system call, in the Other category, returning NTSTATUS. Its syscall number is not the same on every Windows release: across the 26 version-and-architecture pairs recorded here it takes 8 distinct values, from 0x00B1 to 0x013D.
The number is an index into the system service table of one particular build, not a stable identifier, so it is not portable between Windows versions or between x64 and x86. The table below gives the value recorded for each.
Numbers across OS versions (26)
| OS Version | Architecture | Number |
|---|---|---|
| Windows 2000 SP0 | x86 | 0x00B1 (177) |
| Windows 2000 SP1 | x86 | 0x00B1 (177) |
| Windows 2000 SP2 | x86 | 0x00B1 (177) |
| Windows 2000 SP3 | x86 | 0x00B1 (177) |
| Windows 2000 SP4 | x86 | 0x00B1 (177) |
| Windows Server 2003 R2 | x64 | 0x00EB (235) |
| Windows Server 2003 R2 | x86 | 0x00D1 (209) |
| Windows Server 2003 R2 SP2 | x86 | 0x00D1 (209) |
| Windows Server 2003 R2 SP2 | x64 | 0x00EB (235) |
| Windows Server 2003 SP0 | x86 | 0x00D1 (209) |
| Windows Server 2003 SP0 | x64 | 0x00EB (235) |
| Windows Server 2003 SP1 | x86 | 0x00D1 (209) |
| Windows Server 2003 SP2 | x64 | 0x00EB (235) |
| Windows Server 2003 SP2 | x86 | 0x00D1 (209) |
| Windows Vista SP0 | x86 | 0x0114 (276) |
| Windows Vista SP0 | x64 | 0x013D (317) |
| Windows Vista SP1 | x86 | 0x0115 (277) |
| Windows Vista SP1 | x64 | 0x013A (314) |
| Windows Vista SP2 | x86 | 0x0115 (277) |
| Windows Vista SP2 | x64 | 0x013A (314) |
| Windows XP SP0 | x86 | 0x00C9 (201) |
| Windows XP SP1 | x86 | 0x00C9 (201) |
| Windows XP SP1 | x64 | 0x00EB (235) |
| Windows XP SP2 | x86 | 0x00C9 (201) |
| Windows XP SP2 | x64 | 0x00EB (235) |
| Windows XP SP3 | x86 | 0x00C9 (201) |