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147 lines
3.0 KiB
147 lines
3.0 KiB
/*++
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Copyright (c) 2000-2001 Microsoft Corporation
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Module Name:
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timetrace.cxx
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Abstract:
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This module implements a request timing tracing facility.
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Author:
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Michael Courage (mcourage) 8-Mar-2000
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Revision History:
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--*/
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#include "precomp.h"
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#if ENABLE_TIME_TRACE
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#pragma warning( disable : 4035 ) // Warning : No return value
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#pragma warning( disable : 4142 ) // Warning : benign redefinition of type
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__inline ULONGLONG RDTSC( VOID )
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{
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#if defined(_X86_)
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__asm __emit 0x0F __asm __emit 0xA2 // CPUID (memory barrier)
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__asm __emit 0x0F __asm __emit 0x31 // RDTSC
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#else
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return 0;
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#endif
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}
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#pragma warning( default : 4035 )
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#pragma warning( default : 4142 )
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/***************************************************************************++
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Routine Description:
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Creates a new (empty) time trace log buffer.
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Arguments:
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LogSize - Supplies the number of entries in the log.
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ExtraBytesInHeader - Supplies the number of extra bytes to include
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in the log header. This is useful for adding application-
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specific data to the log.
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Return Value:
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PTRACE_LOG - Pointer to the newly created log if successful,
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NULL otherwise.
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--***************************************************************************/
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PTRACE_LOG
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CreateTimeTraceLog(
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IN LONG LogSize,
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IN LONG ExtraBytesInHeader
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)
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{
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return CreateTraceLog(
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TIME_TRACE_LOG_SIGNATURE,
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LogSize,
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ExtraBytesInHeader,
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sizeof(TIME_TRACE_LOG_ENTRY)
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);
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} // CreateTimeTraceLog
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/***************************************************************************++
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Routine Description:
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Destroys a time trace log buffer created with CreateTimeTraceLog().
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Arguments:
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pLog - Supplies the time trace log buffer to destroy.
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--***************************************************************************/
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VOID
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DestroyTimeTraceLog(
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IN PTRACE_LOG pLog
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)
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{
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DestroyTraceLog( pLog );
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} // DestroyTimeTraceLog
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/***************************************************************************++
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Routine Description:
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Writes a new entry to the specified time trace log.
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Arguments:
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pLog - Supplies the log to write to.
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ConnectionId - the id of the connection we're tracing
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RequestId - the id of the request we're tracing
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Action - Supplies an action code for the new log entry.
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--***************************************************************************/
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VOID
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WriteTimeTraceLog(
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IN PTRACE_LOG pLog,
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IN HTTP_CONNECTION_ID ConnectionId,
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IN HTTP_REQUEST_ID RequestId,
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IN USHORT Action
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)
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{
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TIME_TRACE_LOG_ENTRY entry;
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//
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// Initialize the entry.
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//
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// entry.TimeStamp = KeQueryInterruptTime();
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entry.TimeStamp = RDTSC();
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entry.ConnectionId = ConnectionId;
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entry.RequestId = RequestId;
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entry.Action = Action;
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entry.Processor = (USHORT)KeGetCurrentProcessorNumber();
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//
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// Write it to the logs.
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//
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WriteTraceLog( pLog, &entry );
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} // WriteTimeTraceLog
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#endif // ENABLE_TIME_TRACE
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