NAME

       volk_gnsssdr_profile - Profiler application for libvolk_gnsssdr functions.

SYNOPSIS

       volk_gnsssdr_profile [OPTION]

DESCRIPTION

       The  Vector-Optimized  Library  of Kernels of GNSS-SDR (VOLK_GNSSSDR) is a software library that provides
       developers with an interface to use Single Input -  Multiple  Data  (SIMD)  instructions,  which  are  of
       special interest for operations that are in the receiver's critical path of the processing load.

       Processors providing SIMD instruction sets compute with multiple processing elements that perform the
       same operation on multiple data points simultaneously, thus exploiting data-level parallelism, an can be
       found in most modern desktop and laptop personal computers. In a nutshell, VOLK_GNSSSDR implements in
       assembly language optimized versions of computationally-intensive operations for different processor
       architectures that are commonly found in modern computers. In order to use the most optimized version for
       the specific processor(s) of the host machine running the software receiver (that is, the implementation
       than runs the fastest).

       volk_gnsssdr_profile is a program that tests all known VOLK_GNSSSDR kernels (that is, basic processing
       components like adders, multipliers, correlators, and much more) for each architecture supported by the
       host machine, measuring their performance. When finished, the profiler writes to
       $HOME/.volk_gnsssdr/volk_gnsssdr_config the best architecture for each VOLK_GSSSDR function. This file is
       read when using a function to know the best version to execute.

OPTIONS

       volk_gnsssdr_profile takes the following options:

       -h [ --help ] Print help message.

       -b [ --benchmark ] [ =arg(=1) ] (=0) Run all kernels (benchmark mode).

       -t [ --tol ] <arg> (=9.99999997e-07) Set the default error tolerance for tests.

       -v [ --vlen ] <arg> (=8111) Set the default vector length for tests.

       -i [ --iter ] <arg> (=1987) Set the default number of test iterations per kernel.

       -R [ --tests-regex ] <arg> Run tests matching regular expression.

       -u [ --update ] [ =arg(=1) ] (=0) Run only kernels missing from config; use -R to further restrict the
       candidates.

       -n [ --dry-run ] [ =arg(=1) ] (=0) Dry run. Respect other options, but do not write to file.

       -j [ --json ] <arg> JSON output file.

SEE ALSO

       gnss-sdr(1)

       Check https://gnss-sdr.org for more information.

HISTORY

       This  library  was originally developed by Andres Cecilia Luque in the framework of the Summer of Code in
       Space program (SOCIS 2014) by the European Space Agency (ESA), and then integrated  into  gnss-sdr.  This
       software is based on the VOLK library http://libvolk.org/

BUGS

       No known bugs.

AUTHOR

       Andres Cecilia Luque (a.cecilia.luque@gmail.com)

       Carles Fernandez-Prades (carles.fernandez@cttc.es)

0.0.11                                             29 Jul 2019                           volk_gnsssdr_profile(1)