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/** @file
Library that provides services to measure module execution performance
Copyright (c) 2004, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name: PerformanceLib.h
**/
#ifndef __PERFORMANCE_LIB_H__
#define __PERFORMANCE_LIB_H__
//
// Performance library propery mask bits
//
#define PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED 0x00000001
/**
Creates a record for the beginning of a performance measurement.
Creates a record that contains the Handle, Token, and Module.
If TimeStamp is not zero, then TimeStamp is added to the record as the start time.
If TimeStamp is zero, then this function reads the current time stamp
and adds that time stamp value to the record as the start time.
@param Handle Pointer to environment specific context used
to identify the component being measured.
@param Token Pointer to a Null-terminated ASCII string
that identifies the component being measured.
@param Module Pointer to a Null-terminated ASCII string
that identifies the module being measured.
@param TimeStamp 64-bit time stamp.
@retval RETURN_SUCCESS The start of the measurement was recorded.
@retval RETURN_OUT_OF_RESOURCES There are not enough resources to record the measurement.
**/
RETURN_STATUS
EFIAPI
StartPerformanceMeasurement (
IN CONST VOID *Handle, OPTIONAL
IN CONST CHAR8 *Token, OPTIONAL
IN CONST CHAR8 *Module, OPTIONAL
IN UINT64 TimeStamp
);
/**
Fills in the end time of a performance measurement.
Looks up the record that matches Handle, Token, and Module.
If the record can not be found then return RETURN_NOT_FOUND.
If the record is found and TimeStamp is not zero,
then TimeStamp is added to the record as the end time.
If the record is found and TimeStamp is zero, then this function reads
the current time stamp and adds that time stamp value to the record as the end time.
If this function is called multiple times for the same record, then the end time is overwritten.
@param Handle Pointer to environment specific context used
to identify the component being measured.
@param Token Pointer to a Null-terminated ASCII string
that identifies the component being measured.
@param Module Pointer to a Null-terminated ASCII string
that identifies the module being measured.
@param TimeStamp 64-bit time stamp.
@retval RETURN_SUCCESS The end of the measurement was recorded.
@retval RETURN_NOT_FOUND The specified measurement record could not be found.
**/
RETURN_STATUS
EFIAPI
EndPerformanceMeasurement (
IN CONST VOID *Handle, OPTIONAL
IN CONST CHAR8 *Token, OPTIONAL
IN CONST CHAR8 *Module, OPTIONAL
IN UINT64 TimeStamp
);
/**
Retrieves a previously logged performance measurement.
Looks up the record that matches Handle, Token, and Module.
If the record can not be found then return RETURN_NOT_FOUND.
If the record is found then the start of the measurement is returned in StartTimeStamp,
and the end of the measurement is returned in EndTimeStamp.
@param LogEntryKey The key for the previous performance measurement log entry.
If 0, then the first performance measurement log entry is retrieved.
@param Handle Pointer to environment specific context used
to identify the component being measured.
@param Token Pointer to a Null-terminated ASCII string
that identifies the component being measured.
@param Module Pointer to a Null-terminated ASCII string
that identifies the module being measured.
@param StartTimeStamp The 64-bit time stamp that was recorded when the measurement was started.
@param EndTimeStamp The 64-bit time stamp that was recorded when the measurement was ended.
@return The key for the current performance log entry.
**/
UINTN
EFIAPI
GetPerformanceMeasurement (
UINTN LogEntryKey,
OUT CONST VOID **Handle,
OUT CONST CHAR8 **Token,
OUT CONST CHAR8 **Module,
OUT UINT64 *StartTimeStamp,
OUT UINT64 *EndTimeStamp
);
/**
Returns TRUE if the performance measurement macros are enabled.
This function returns TRUE if the PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of
PcdPerformanceLibraryPropertyMask is set. Otherwise FALSE is returned.
@retval TRUE The PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of
PcdPerformanceLibraryPropertyMask is set.
@retval FALSE The PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of
PcdPerformanceLibraryPropertyMask is clear.
**/
BOOLEAN
EFIAPI
PerformanceMeasurementEnabled (
VOID
);
/**
Macro that calls EndPerformanceMeasurement().
If the PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of PcdPerformanceLibraryPropertyMask is set,
then EndPerformanceMeasurement() is called.
**/
#define PERF_END(Handle, Token, Module, TimeStamp) \
do { \
if (PerformanceMeasurementEnabled ()) { \
EndPerformanceMeasurement (Handle, Token, Module, TimeStamp); \
} \
} while (FALSE)
/**
Macro that calls StartPerformanceMeasurement().
If the PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of PcdPerformanceLibraryPropertyMask is set,
then StartPerformanceMeasurement() is called.
**/
#define PERF_START(Handle, Token, Module, TimeStamp) \
do { \
if (PerformanceMeasurementEnabled ()) { \
StartPerformanceMeasurement (Handle, Token, Module, TimeStamp); \
} \
} while (FALSE)
/**
Macro that marks the beginning of performance measurement source code.
If the PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of PcdPerformanceLibraryPropertyMask is set,
then this macro marks the beginning of source code that is included in a module.
Otherwise, the source lines between PERF_CODE_BEGIN() and PERF_CODE_END() are not included in a module.
**/
#define PERF_CODE_BEGIN() do { if (PerformanceMeasurementEnabled ()) { UINT8 __PerformanceCodeLocal
/**
Macro that marks the end of performance measurement source code.
If the PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of PcdPerformanceLibraryPropertyMask is set,
then this macro marks the end of source code that is included in a module.
Otherwise, the source lines between PERF_CODE_BEGIN() and PERF_CODE_END() are not included in a module.
**/
#define PERF_CODE_END() __PerformanceCodeLocal = 0; } } while (FALSE)
/**
Macro that declares a section of performance measurement source code.
If the PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of PcdPerformanceLibraryPropertyMask is set,
then the source code specified by Expression is included in a module.
Otherwise, the source specified by Expression is not included in a module.
@param Expression Performance measurement source code to include in a module.
**/
#define PERF_CODE(Expression) \
PERF_CODE_BEGIN (); \
Expression \
PERF_CODE_END ()
#endif
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