mirror of https://gitee.com/openkylin/linux.git
ACPICA: DEBUG_PRINT macros: Update to improve performance.
Move check for "debug enable" to before the actual call to the debug print routine. Improves time of ASLTS by about 15%. Also, remove "safe" exit macros since no complex expressions are ever used in the return statements. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Bob Moore
Rafael J. Wysocki
parent
0fdce47677
commit
ad5a06f296
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@ -392,29 +392,51 @@
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* Debug macros that are conditionally compiled
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*/
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#ifdef ACPI_DEBUG_OUTPUT
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/*
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* Function entry tracing
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*
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* The name of the function is emitted as a local variable that is
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* intended to be used by both the entry trace and the exit trace.
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*/
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#define ACPI_FUNCTION_TRACE(a) ACPI_FUNCTION_NAME(a) \
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acpi_ut_trace(ACPI_DEBUG_PARAMETERS)
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#define ACPI_FUNCTION_TRACE_PTR(a, b) ACPI_FUNCTION_NAME(a) \
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acpi_ut_trace_ptr(ACPI_DEBUG_PARAMETERS, (void *)b)
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#define ACPI_FUNCTION_TRACE_U32(a, b) ACPI_FUNCTION_NAME(a) \
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acpi_ut_trace_u32(ACPI_DEBUG_PARAMETERS, (u32)b)
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#define ACPI_FUNCTION_TRACE_STR(a, b) ACPI_FUNCTION_NAME(a) \
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acpi_ut_trace_str(ACPI_DEBUG_PARAMETERS, (char *)b)
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#define ACPI_FUNCTION_ENTRY() acpi_ut_track_stack_ptr()
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/* Helper macro */
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#define ACPI_TRACE_ENTRY(name, function, cast, param) \
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ACPI_FUNCTION_NAME (name) \
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function (ACPI_DEBUG_PARAMETERS, cast (param))
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/* The actual entry trace macros */
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#define ACPI_FUNCTION_TRACE(name) \
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ACPI_FUNCTION_NAME(name) \
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acpi_ut_trace (ACPI_DEBUG_PARAMETERS)
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#define ACPI_FUNCTION_TRACE_PTR(name, pointer) \
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ACPI_TRACE_ENTRY (name, acpi_ut_trace_ptr, (void *), pointer)
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#define ACPI_FUNCTION_TRACE_U32(name, value) \
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ACPI_TRACE_ENTRY (name, acpi_ut_trace_u32, (u32), value)
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#define ACPI_FUNCTION_TRACE_STR(name, string) \
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ACPI_TRACE_ENTRY (name, acpi_ut_trace_str, (char *), string)
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#define ACPI_FUNCTION_ENTRY() \
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acpi_ut_track_stack_ptr()
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/*
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* Function exit tracing.
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* WARNING: These macros include a return statement. This is usually considered
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* bad form, but having a separate exit macro is very ugly and difficult to maintain.
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* One of the FUNCTION_TRACE macros above must be used in conjunction with these macros
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* so that "_AcpiFunctionName" is defined.
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* Function exit tracing
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*
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* Note: the DO_WHILE0 macro is used to prevent some compilers from complaining
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* about these constructs.
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* These macros include a return statement. This is usually considered
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* bad form, but having a separate exit macro before the actual return
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* is very ugly and difficult to maintain.
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*
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* One of the FUNCTION_TRACE macros above must be used in conjunction
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* with these macros so that "_AcpiFunctionName" is defined.
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*
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* Note: the DO_WHILE0 macro is used to prevent some compilers from
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* complaining about these constructs. On other compilers the do...while
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* adds some extra code, so this feature is optional.
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*/
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#ifdef ACPI_USE_DO_WHILE_0
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#define ACPI_DO_WHILE0(a) do a while(0)
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@ -422,55 +444,35 @@
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#define ACPI_DO_WHILE0(a) a
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#endif
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#define return_VOID ACPI_DO_WHILE0 ({ \
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acpi_ut_exit (ACPI_DEBUG_PARAMETERS); \
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return;})
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/*
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* There are two versions of most of the return macros. The default version is
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* safer, since it avoids side-effects by guaranteeing that the argument will
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* not be evaluated twice.
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*
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* A less-safe version of the macros is provided for optional use if the
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* compiler uses excessive CPU stack (for example, this may happen in the
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* debug case if code optimzation is disabled.)
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*/
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#ifndef ACPI_SIMPLE_RETURN_MACROS
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/* Exit trace helper macro */
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#define return_ACPI_STATUS(s) ACPI_DO_WHILE0 ({ \
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register acpi_status _s = (s); \
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acpi_ut_status_exit (ACPI_DEBUG_PARAMETERS, _s); \
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return (_s); })
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#define return_PTR(s) ACPI_DO_WHILE0 ({ \
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register void *_s = (void *) (s); \
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acpi_ut_ptr_exit (ACPI_DEBUG_PARAMETERS, (u8 *) _s); \
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return (_s); })
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#define return_VALUE(s) ACPI_DO_WHILE0 ({ \
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register u64 _s = (s); \
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acpi_ut_value_exit (ACPI_DEBUG_PARAMETERS, _s); \
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return (_s); })
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#define return_UINT8(s) ACPI_DO_WHILE0 ({ \
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register u8 _s = (u8) (s); \
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acpi_ut_value_exit (ACPI_DEBUG_PARAMETERS, (u64) _s); \
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return (_s); })
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#define return_UINT32(s) ACPI_DO_WHILE0 ({ \
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register u32 _s = (u32) (s); \
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acpi_ut_value_exit (ACPI_DEBUG_PARAMETERS, (u64) _s); \
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return (_s); })
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#else /* Use original less-safe macros */
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#define ACPI_TRACE_EXIT(function, cast, param) \
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ACPI_DO_WHILE0 ({ \
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function (ACPI_DEBUG_PARAMETERS, cast (param)); \
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return ((param)); \
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})
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#define return_ACPI_STATUS(s) ACPI_DO_WHILE0 ({ \
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acpi_ut_status_exit (ACPI_DEBUG_PARAMETERS, (s)); \
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return((s)); })
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#define return_PTR(s) ACPI_DO_WHILE0 ({ \
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acpi_ut_ptr_exit (ACPI_DEBUG_PARAMETERS, (u8 *) (s)); \
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return((s)); })
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#define return_VALUE(s) ACPI_DO_WHILE0 ({ \
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acpi_ut_value_exit (ACPI_DEBUG_PARAMETERS, (u64) (s)); \
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return((s)); })
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#define return_UINT8(s) return_VALUE(s)
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#define return_UINT32(s) return_VALUE(s)
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/* The actual exit macros */
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#endif /* ACPI_SIMPLE_RETURN_MACROS */
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#define return_VOID \
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ACPI_DO_WHILE0 ({ \
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acpi_ut_exit (ACPI_DEBUG_PARAMETERS); \
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return; \
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})
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#define return_ACPI_STATUS(status) \
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ACPI_TRACE_EXIT (acpi_ut_status_exit, (acpi_status), status)
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#define return_PTR(pointer) \
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ACPI_TRACE_EXIT (acpi_ut_ptr_exit, (u8 *), pointer)
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#define return_VALUE(value) \
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ACPI_TRACE_EXIT (acpi_ut_value_exit, (u64), value)
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/* These exit macros are superfluous and should be removed entirely */
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#define return_UINT8 return_VALUE
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#define return_UINT32 return_VALUE
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/* Conditional execution */
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@ -263,16 +263,42 @@
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* Common parameters used for debug output functions:
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* line number, function name, module(file) name, component ID
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*/
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#define ACPI_DEBUG_PARAMETERS __LINE__, ACPI_GET_FUNCTION_NAME, _acpi_module_name, _COMPONENT
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#define ACPI_DEBUG_PARAMETERS \
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__LINE__, ACPI_GET_FUNCTION_NAME, _acpi_module_name, _COMPONENT
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/*
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* Master debug print macros
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* Print message if and only if:
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* 1) Debug print for the current component is enabled
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* 2) Debug error level or trace level for the print statement is enabled
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*
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* November 2012: Moved the runtime check for whether to actually emit the
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* debug message outside of the print function itself. This improves overall
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* performance at a relatively small code cost. Implementation involves the
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* use of variadic macros supported by C99.
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*/
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#define ACPI_DEBUG_PRINT(plist) acpi_debug_print plist
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#define ACPI_DEBUG_PRINT_RAW(plist) acpi_debug_print_raw plist
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/* DEBUG_PRINT functions */
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#define ACPI_DEBUG_PRINT(plist) ACPI_ACTUAL_DEBUG plist
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#define ACPI_DEBUG_PRINT_RAW(plist) ACPI_ACTUAL_DEBUG_RAW plist
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/* Helper macros for DEBUG_PRINT */
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#define ACPI_IS_DEBUG_ENABLED(level, component) \
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(level & acpi_dbg_level) && (component & acpi_dbg_layer)
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#define ACPI_DEBUG(function, level, line, filename, modulename, component, ...) \
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if (ACPI_IS_DEBUG_ENABLED (level, component)) \
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{ \
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function (level, line, filename, modulename, component, __VA_ARGS__); \
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}
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#define ACPI_ACTUAL_DEBUG(level, line, filename, modulename, component, ...) \
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ACPI_DEBUG (acpi_debug_print, level, line, filename, modulename, component, __VA_ARGS__)
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#define ACPI_ACTUAL_DEBUG_RAW(level, line, filename, modulename, component, ...) \
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ACPI_DEBUG (acpi_debug_print_raw, level, line, filename, modulename, component, __VA_ARGS__)
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#else
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/*
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