From cTuning.org
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== Function cloning == | == Function cloning == | ||
| - | === Description == | + | === Description === |
SIMPLE_IPA_PASS "generic_cloning" | SIMPLE_IPA_PASS "generic_cloning" | ||
This pass performs generic function cloning. It has the ability to create any number of clones for a given function on demand, and aply different fine-grain optimizations for a given clone, also provide mechanism to select different clones at run-time based on optimization scenarios. It can be triggered by GCC option -fapi-clone-function and ICI adaptation framework. The information come from xml files through ICI. | This pass performs generic function cloning. It has the ability to create any number of clones for a given function on demand, and aply different fine-grain optimizations for a given clone, also provide mechanism to select different clones at run-time based on optimization scenarios. It can be triggered by GCC option -fapi-clone-function and ICI adaptation framework. The information come from xml files through ICI. | ||
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'''Primary functions''' | '''Primary functions''' | ||
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exec_clone_functions (void) | exec_clone_functions (void) | ||
add_call_to_clones (struct cgraph_node *orig, int nid) | add_call_to_clones (struct cgraph_node *orig, int nid) | ||
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is_it_main (struct cgraph_node *cg_func) | is_it_main (struct cgraph_node *cg_func) | ||
| - | === Work flow == | + | === Work flow === |
== Instrumentation == | == Instrumentation == | ||
| - | === Description == | + | === Description === |
SIMPLE_IPA_PASS "Instrumentation" | SIMPLE_IPA_PASS "Instrumentation" | ||
This pass performs function instrumentation. Currently, it has only ability to add function calls and selection mechanism to choose clones based on the external library monitoring routines. We also have the ability to link external libraries transparently withou Makefile modifications. This pass also can be triggered by GCC option fapi-instrument-functions and ICI adaptation framework. The information come from xml files through ICI. | This pass performs function instrumentation. Currently, it has only ability to add function calls and selection mechanism to choose clones based on the external library monitoring routines. We also have the ability to link external libraries transparently withou Makefile modifications. This pass also can be triggered by GCC option fapi-instrument-functions and ICI adaptation framework. The information come from xml files through ICI. | ||
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'''Primary functions''' | '''Primary functions''' | ||
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exec_instrument_functions (void) | exec_instrument_functions (void) | ||
add_timer_begin (struct cgraph_node *cg_func, char *funname, int cloned) | add_timer_begin (struct cgraph_node *cg_func, char *funname, int cloned) | ||
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=== Work flow === | === Work flow === | ||
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== ICI Adaptation work flow == | == ICI Adaptation work flow == | ||
Revision as of 08:30, 11 August 2009
Google Summer of Code 2009: Generic function cloning.
Liang Peng
Based on Run-time Function Adaptation for Statically-Compiled Programs based on function multiversioning and FunctionSpecificOpt, we enabled generic function cloning with low-overhead program behavior monitoring routines. It will enable fine-grain self-tuning binaries and libraries and will increase performance and portability of the static code which is particularly important for rapidly evolving hardware and virtual enviroments.
Contents |
Key data structures
Function cloning
Description
SIMPLE_IPA_PASS "generic_cloning" This pass performs generic function cloning. It has the ability to create any number of clones for a given function on demand, and aply different fine-grain optimizations for a given clone, also provide mechanism to select different clones at run-time based on optimization scenarios. It can be triggered by GCC option -fapi-clone-function and ICI adaptation framework. The information come from xml files through ICI.
Primary functions
exec_clone_functions (void) add_call_to_clones (struct cgraph_node *orig, int nid) get_arguments (tree tree_list) parse_arguments (char *text, unsigned int *argc) find_clone_options (char *funcname, int *nid) is_in_clone_list (const char *func_name, const char *file_name, int *nid) freecloneinfo (cloneinfo cdi) is_it_clonable (struct cgraph_node *cg_func) is_it_main (struct cgraph_node *cg_func)
Work flow
Instrumentation
Description
SIMPLE_IPA_PASS "Instrumentation" This pass performs function instrumentation. Currently, it has only ability to add function calls and selection mechanism to choose clones based on the external library monitoring routines. We also have the ability to link external libraries transparently withou Makefile modifications. This pass also can be triggered by GCC option fapi-instrument-functions and ICI adaptation framework. The information come from xml files through ICI.
Primary functions
exec_instrument_functions (void) add_timer_begin (struct cgraph_node *cg_func, char *funname, int cloned) add_timer_end (struct cgraph_node *cg_func, char *funname) freeinstrinfo (instrinfo idi) is_in_instrument_list (const char *func_name, const char *file_name, int *nid) is_it_instrumentable (struct cgraph_node *cg_func)
Work flow
ICI Adaptation work flow
New ICI event
ICI event "load_instr_config" Call this event at the very beginning of function cloning pass. Call back function: load_clone_config () ICI event “load_clone_config” Call this event at the very beginning of function instrumentation pass. Call back function : load_instr_config ()