ntexapi cycle stats docs

winsiderss · Sep 28, 2024 · 673f4a4 · 673f4a4
1 parent 27fb470
commit 673f4a4
Showing 1 changed file with 10 additions and 2 deletions.
diff --git a/phnt/include/ntexapi.h b/phnt/include/ntexapi.h
@@ -1359,7 +1359,7 @@ typedef enum _SYSTEM_INFORMATION_CLASS
     SystemProcessorPerformanceInformation, // q: SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION (EX in: USHORT ProcessorGroup)
     SystemFlagsInformation, // q: SYSTEM_FLAGS_INFORMATION
     SystemCallTimeInformation, // not implemented // SYSTEM_CALL_TIME_INFORMATION // 10
-    SystemModuleInformation, // q: RTL_PROCESS_MODULES
+    SystemModuleInformation, // q: RTL_PROCS_MODULES
     SystemLocksInformation, // q: RTL_PROCESS_LOCKS
     SystemStackTraceInformation, // q: RTL_PROCESS_BACKTRACES
     SystemPagedPoolInformation, // not implemented
@@ -1587,7 +1587,7 @@ typedef enum _SYSTEM_INFORMATION_CLASS
     SystemPointerAuthInformation, // SYSTEM_POINTER_AUTH_INFORMATION
     SystemSecureKernelDebuggerInformation,
     SystemOriginalImageFeatureInformation, // q: in: SYSTEM_ORIGINAL_IMAGE_FEATURE_INFORMATION_INPUT, out: SYSTEM_ORIGINAL_IMAGE_FEATURE_INFORMATION_OUTPUT // NtQuerySystemInformationEx
-    SystemMemoryNumaInformation, // SYSTEM_MEMORY_NUMA_INFORMATION_INPUT, SYSTEM_MEMORY_NUMA_INFORMATION_OUTPUT 
+    SystemMemoryNumaInformation, // SYSTEM_MEMORY_NUMA_INFORMATION_INPUT, SYSTEM_MEMORY_NUMA_INFORMATION_OUTPUT
     SystemMemoryNumaPerformanceInformation, // SYSTEM_MEMORY_NUMA_PERFORMANCE_INFORMATION_INPUTSYSTEM_MEMORY_NUMA_PERFORMANCE_INFORMATION_INPUT, SYSTEM_MEMORY_NUMA_PERFORMANCE_INFORMATION_OUTPUT // since 24H2 // 240
     SystemCodeIntegritySignedPoliciesFullInformation,
     SystemSecureSecretsInformation,
@@ -3853,6 +3853,14 @@ typedef struct _SYSTEM_HYPERVISOR_DETAIL_INFORMATION
 // private
 typedef struct _SYSTEM_PROCESSOR_CYCLE_STATS_INFORMATION
 {
+    //
+    // First index is bucket (see: PoGetFrequencyBucket) selected based on latest frequency percent
+    // using _KPRCB.PowerState.FrequencyBucketThresholds.
+    //
+    // Second index is _KPRCB.PowerState.ArchitecturalEfficiencyClass, accounting for architecture
+    // dependent KeHeteroSystem and using _KPRCB.PowerState.EarlyBootArchitecturalEfficiencyClass
+    // instead, when appropriate.
+    //
     ULONGLONG Cycles[4][2];
 } SYSTEM_PROCESSOR_CYCLE_STATS_INFORMATION, *PSYSTEM_PROCESSOR_CYCLE_STATS_INFORMATION;