Feature Extraction Using ClangTool

The loop convert executable can be used in two ways

Data Generation Mode

In this mode, the executable will print features in the console which is usefull to make a dataset. To print out features, the boolean parameter -P must be put to TRUE.

path/to/cfe-6.0.0.src/build/bin/loop-convert main.cpp -P=TRUE -- -Iinclude path/to/hpx path/to/Boost

This will output the static in the console which is useful when you want to generate data.

Loop Conversion Mode

In this mode, the executable will convert HPX for-each loops that contains the execution policies par_if,adaptive_chunk_size,make_prefetcher_policy. To convert a loop, the parameter -C must be set to TRUE.

path/to/cfe-6.0.0.src/build/bin/loop-convert main.cpp -C=TRUE -- -Iinclude path/to/hpx path/to/Boost

when using this command on a main.cpp that contains some of these loops

hpx::parallel::for_each(hpx::parallel::par_if, time_range.begin(), time_range.end(), f);

hpx::parallel::for_each(hpx::parallel::par.with(hpx::parallel::adaptive_chunk_size()), time_range.begin(), time_range.end(), f);	

hpx::parallel::for_each(hpx::parallel::execution::make_prefetcher_policy(policy, prefetching_distance_factor, ...), time_range.begin(), time_range.end(), f);

These will be changed to:

hpx::parallel::for_each(hpx::parallel::par, time_range.begin(), time_range.end(), f);

hpx::parallel::for_each(hpx::parallel::par.with(hpx::parallel::chunk_size_determination(EXTRACTED_STATICE_DYNAMIC_FEATURES)), time_range.begin(), time_range.end(), f);	

hpx::parallel::for_each(hpx::parallel::execution::make_prefetcher_policy(policy, hpx::parallel::prefetching_distance_determination(EXTRACTED_STATICE_DYNAMIC_FEATURES), ...), time_range.begin(), time_range.end(), f);

#Note the execution policies par_if, adaptive_chunk_size() and make_prefetcher_policy() are not defined and therefore the compiler will bring an error unless they are defined as empty structures

For example

namespace hpx { namespace parallel { struct adaptive_chunk_size {};}}