73 lines
1.2 KiB
C
73 lines
1.2 KiB
C
/*++
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Copyright (c) 2001 Microsoft Corporation
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Module Name:
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setlog.c
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Abstract:
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This module contains code to enable/disable performance logging. This
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routine is platform specific to optimize cache usage.
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Author:
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David N. Cutler (davec) 8-Sep-2001
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Environment:
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Kernel mode only.
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Revision History:
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--*/
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#include "perfp.h"
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VOID
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PerfSetLogging (
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IN PVOID MaskAddress
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)
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/*++
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Routine Description:
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This function is called to enable (MaskAddress is nonNULL) or disable
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(MaskAddress is NULL) performance data collection at context switches.
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Arguments:
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MaskAddress - Supplies a pointer to the performance logging mask or
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NULL.
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Return Value:
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None.
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--*/
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{
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ULONG Index;
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PKPRCB Prcb;
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//
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// Store the specified mask address in the stack limit field of the PCR
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// for each processor in the configuation.
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//
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for (Index = 0; Index < (ULONG)KeNumberProcessors; Index += 1) {
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Prcb = KiProcessorBlock[Index];
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//
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// What even is needed.
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//
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Prcb->SpareHotData[1] = MaskAddress;
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}
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return;
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}
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