175 lines
4 KiB
C
175 lines
4 KiB
C
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// Copyright (c) 1999-2000 Microsoft Corporation
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///======================================================================
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//
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// Perf.h
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//
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// Fill in this header file with definitions for the performance
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// counters you want to use.
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//
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///======================================================================
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#ifndef _PERF_H_
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#define _PERF_H_
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//**********************************************************************
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//
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// Modify this section for your counters
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//
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#define DRV_NAME "WCEUSBSH"
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//
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// Define PERFORMANCE to "1" turn on the cycle performance counters.
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// I currently set it in the debug build (or explicitely in SOURCES for free build) since
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// the free build only sees a slight gain IFF *all* debug tracing (except DBG_ERR)
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// is turned off.
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//
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#if DBG
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#if !defined(MSFT_NT_BUILD)
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#define PERFORMANCE 1
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#endif
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#endif
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//
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// This is the array of counter index definitions.
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// Note that when a new entry is added here that the name array
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// in perf.c must be updated as well. The convention is that
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// the index name should match the function name identically, with
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// the PERF_ prefix.
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//
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enum {
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//
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// Write path
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//
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PERF_Write,
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PERF_WriteComplete,
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PERF_WriteTimeout,
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//
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// Read path
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//
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PERF_StartUsbReadWorkItem,
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PERF_UsbRead,
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PERF_UsbReadCompletion,
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PERF_CheckForQueuedUserReads,
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PERF_GetUserData,
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PERF_PutUserData,
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PERF_CancelUsbReadIrp,
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PERF_Read,
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PERF_StartOrQueueIrp,
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PERF_StartUserRead,
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PERF_GetNextUserIrp,
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PERF_CancelCurrentRead,
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PERF_CancelQueuedIrp,
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PERF_ReadTimeout,
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PERF_IntervalReadTimeout,
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PERF_CancelUsbReadWorkItem,
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//
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// USB Path
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//
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PERF_UsbReadWritePacket,
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//
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// Serial path
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//
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PERF_ProcessSerialWaits,
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//
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// Utils
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//
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PERF_TryToCompleteCurrentIrp,
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PERF_RundownIrpRefs,
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PERF_RecycleIrp,
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PERF_ReuseIrp,
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PERF_CalculateTimeout,
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//
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// leave this entry alone
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//
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NUM_PERF_COUNTERS
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} PERF_INDICED;
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//
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// End of user-modified portion
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//
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//**********************************************************************
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typedef struct {
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KSPIN_LOCK Lock;
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LONG Count;
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LARGE_INTEGER TotalCycles;
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} PERF_COUNTER, *PPERF_COUNTER;
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#if PERFORMANCE
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extern PERF_COUNTER PerfCounter[];
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//
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// Definition for raw bytes that generate RDTSC instruction
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//
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#define RDTSC(_VAR) \
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_asm { \
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_asm push eax \
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_asm push edx \
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_asm _emit 0Fh \
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_asm _emit 31h \
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_asm mov _VAR.LowPart, eax \
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_asm mov _VAR.HighPart, edx \
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_asm pop edx \
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_asm pop eax \
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}
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//
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// Definitions for performance counters that execute
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// at DISPATCH_LEVEL (e.g. in DPCs) and lower IRQLs.
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//
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// NOTE: we read the cycle counter at the outside of the
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// macros since we compensate for the overhead of the macros themselves.
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//
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#define PERF_ENTRY(_INDEX) \
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LARGE_INTEGER _INDEX##perfStart; \
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LARGE_INTEGER _INDEX##perfEnd; \
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RDTSC(_INDEX##perfStart); \
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InterlockedIncrement( &PerfCounter[_INDEX].Count )
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#define PERF_EXIT(_INDEX) \
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RDTSC(_INDEX##perfEnd); \
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_INDEX##perfEnd.QuadPart -= _INDEX##perfStart.QuadPart; \
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ExInterlockedAddLargeInteger( &PerfCounter[_INDEX].TotalCycles, \
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_INDEX##perfEnd, \
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&PerfCounter[_INDEX].Lock )
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//
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// Definitions for performance counters that execute
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// in ISRs, and hence need no locking
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//
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#define PERF_ISR_ENTRY(_INDEX) PERF_ENTRY(_INDEX)
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#define PERF_ISR_EXIT(_INDEX) \
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_INDEX##perfEnd.QuadPart -= _INDEX##perfStart.QuadPart; \
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PerfCounter[_INDEX].TotalCycles.QuadPart += _INDEX##perfEnd.QuadPart; \
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RDTSC(_INDEX##perfEnd)
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#else // PERFORMANCE
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#define PERF_ENTRY(_INDEX)
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#define PERF_EXIT(_INDEX)
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#endif PERFORMANCE
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//
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// Externs for perf.c
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//
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VOID InitPerfCounters();
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VOID DumpPerfCounters();
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#endif _PERF_H_
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