diff --git a/docs/index.rst b/docs/index.rst index 85e119104..ea4543e22 100644 --- a/docs/index.rst +++ b/docs/index.rst @@ -61,7 +61,8 @@ User Guide running_on_hpc_clusters tests/index parameters - analysis + insitu_analysis + postprocessing instability Developer Guide diff --git a/docs/insitu_analysis.rst b/docs/insitu_analysis.rst new file mode 100644 index 000000000..992e26b60 --- /dev/null +++ b/docs/insitu_analysis.rst @@ -0,0 +1,141 @@ +.. insitu_analysis + +In-situ analysis +===== + +*In-situ analysis* refers to analyzing the simulations as they are running. +There are two options: using the *runtime diagnostics* that are built-in to Quokka, and using *Ascent*, a third-party library. + +Diagnostics +----------------------- +Most of Quokka's diagnostics are adapted from the implementation included in the *Pele* suite of AMReX-based combustion codes. +(See the documentation for `PeleLMeX diagnostics `_ for an explanation of the original implementation.) + +There are three built-in diagnostics that can be configured to output at periodic intervals while the simulation is running: + +* axis-aligned 2D projections +* axis-aligned 2D slices, and +* N-dimensional probability distribution functions (PDFs). + +2D Projections +^^^^^^^^^^^^^^^^^^^^^^^ +This diagnostic outputs 2D axis-aligned projections as AMReX plotfiles prefixed with `proj`. + +Currently, using this diagnostic requires implementing a custom function in the problem generator for your simulation. +(In the future, this diagnostic may be improved so that it can be configured entirely with runtime parameters.) + +The problem generator must call `computePlaneProjection(F const &user_f, const int dir)` +where `user_f` is a lambda function that returns the value to project and `dir` is the axis along which the projection is taken. + +*Example problem generator implementation:* :: + + template <> auto RadhydroSimulation::ComputeProjections(const int dir) const -> std::unordered_map> + { + // compute density projection + std::unordered_map> proj; + proj["nH"] = computePlaneProjection( + [=] AMREX_GPU_DEVICE(int i, int j, int k, amrex::Array4 const &state) noexcept { + Real const rho = state(i, j, k, HydroSystem::density_index); + return (quokka::cooling::cloudy_H_mass_fraction * rho) / m_H; + }, + dir); + return proj; + } + +*Example input file configuration:* :: + + projection_interval = 200 + projection.dirs = x z + +2D Slices +^^^^^^^^^^^^^^^^^^^^^^^ +.. note:: This is based on the *DiagFramePlane* diagnostic from PelePhysics, and the same + runtime parameters should apply here without modification. The output format is also the + same as that produced by the *Pele* codes. + +This outputs 2D slices of the simulation as AMReX plotfiles that can be further examined using, e.g., VisIt or yt. + +*Example input file configuration:* :: + + quokka.diagnostics = slice_z # Space-separated name(s) of diagnostics (arbitrary) + quokka.slice_z.type = DiagFramePlane # Diagnostic type (others may be added in the future) + quokka.slice_z.file = slicez_plt # Output file prefix (should end in "plt") + quokka.slice_z.normal = 2 # Plane normal (0 == x, 1 == y, 2 == z) + quokka.slice_z.center = 2.4688e20 # Coordinate in the normal direction + quokka.slice_z.int = 10 # Output interval (in number of coarse steps) + quokka.slice_z.interpolation = Linear # Interpolation type: Linear or Quadratic (default: Linear) + + # The problem must output these derived variable(s) + derived_vars = temperature + # List of variables to include in output + quokka.slice_z.field_names = gasDensity gasInternalEnergy temperature + +Histograms/PDFs +^^^^^^^^^^^^^^^^^^^^^^^ +.. note:: This is based on the *DiagPDF* diagnostic from PelePhysics, but significant changes + have been made to both the runtime parameters and the output format in order to support + N-dimensional histograms, log-spaced binning, and histogramming by mass. + +This adds histogram outputs (as fixed-width text files) at fixed timestep intervals as the simulation evolves. +The quantity accumulated in each bin is the total mass, volume, or cell count summed over all cells not covered by refined grids over all AMR levels. If unspecified in the input parameters, the default is to accumulate the volume in each bin. + +By default, the bins extend over the full range of the data at a given timestep. The *range* parameter can instead specify the minimum and maximum extent for the bins. Bins can be optionally log-spaced by setting *log_spaced_bins = 1*. + +Normalization of the output is left up to the user. + +*Example input file configuration:* :: + + quokka.hist_temp.type = DiagPDF # Diagnostic type + quokka.hist_temp.file = PDFTempDens # Output file prefix + quokka.hist_temp.int = 10 # Output cadence (in number of coarse steps) + quokka.hist_temp.weight_by = mass # (Optional, default: volume) Accumulate: mass, volume, cell_counts + quokka.hist_temp.var_names = temperature gasDensity # Variable(s) of interest (compute a N-D histogram) + + quokka.hist_temp.temperature.nBins = 20 # temperature: Number of bins + quokka.hist_temp.temperature.log_spaced_bins = 1 # temperature: (Optional, default: 0) Use log-spaced bins + quokka.hist_temp.temperature.range = 1e3 1e7 # temperature: (Optional, default: data range) Specify min/max of bins + + quokka.hist_temp.gasDensity.nBins = 5 # gasDensity: Number of bins + quokka.hist_temp.gasDensity.log_spaced_bins = 1 # gasDensity: (Optional, default: 0) Use log-spaced bins + quokka.hist_temp.gasDensity.range = 1e-29 1e-23 # gasDensity: (Optional, default: data range) Specify min/max of bins + + +*Filters (based on any variables, not necessary those used for the histogram) can be optionally added:* :: + + quokka.hist_temp.filters = dense # (Optional) List of filters + quokka.hist_temp.dense.field_name = gasDensity # Filter field + quokka.hist_temp.dense.value_greater = 1e-25 # Filters: value_greater, value_less, value_inrange + +Ascent (deprecated) +----------------------- +.. warning:: Due to correctness and performance issues, **using Ascent is not recommended**. Support for Ascent will be removed in a future version of Quokka. + +Ascent allows you to generate visualizations (as PNG images) while the simulation is running, without any extra effort. + +.. note:: On Setonix, Ascent is already built. + In your job script, add the line: + ``export Ascent_DIR=/software/projects/pawsey0807/bwibking/ascent_06082023/install/ascent-develop/lib/cmake/ascent``. + +Compiling Ascent via Spack +^^^^^^^^^^^^^^^^^^^^^^^ +1. Run ``spack external find``. +2. Make sure there are entries listed for ``hdf5``, ``cuda``, and ``openmpi`` in your ``~/.spack/packages.yaml`` file. +3. Add `buildable: False `_ to each entry. +4. Run ``spack fetch --dependencies ascent@develop+cuda+vtkh~fortran~shared cuda_arch=70 ^conduit~parmetis~fortran`` +5. On a dedicated compute node, run ``spack install ascent@develop+cuda+vtkh~fortran~shared cuda_arch=70 ^conduit~parmetis~fortran`` + +For A100 GPUs, change the above lines to `cuda_arch=80`. +Currently, it's not possible to `build for both GPU models at the same time `_. + +Compiling Quokka with Ascent support +^^^^^^^^^^^^^^^^^^^^^^^ +1. Load Ascent: ``spack load ascent`` +2. Add ``-DAMReX_ASCENT=ON -DAMReX_CONDUIT=ON`` to your CMake options. +3. Compile your problem, e.g.: ``ninja -j4 test_hydro3d_blast`` + +Customizing the visualization +^^^^^^^^^^^^^^^^^^^^^^^ +Add an `ascent_actions.yaml file `_ to the simulation working directory. +This file can even be edited while the simulation is running! + +.. warning:: Volume renderings do not correctly handle ghost cells (`GitHub issue `_). diff --git a/docs/analysis.rst b/docs/postprocessing.rst similarity index 61% rename from docs/analysis.rst rename to docs/postprocessing.rst index 614f83aa3..98736f1c1 100644 --- a/docs/analysis.rst +++ b/docs/postprocessing.rst @@ -1,42 +1,10 @@ -.. Analysis +.. Postprocessing -Analyzing simulations +Postprocessing ===== -There are several ways to analyze Quokka simulations. One method (Ascent) allows you to run the analysis in memory as the simulation is running. -The other methods (AMReX PlotfileTools, yt, VisIt) allow you to analyze the outputs after they are written to disk. - -Ascent ------------------------ -Ascent allows you to generate visualizations (as PNG images) while the simulation is running, without any extra effort. - -.. note:: On Setonix, Ascent is already built. - In your job script, add the line: - ``export Ascent_DIR=/software/projects/pawsey0807/bwibking/ascent_06082023/install/ascent-develop/lib/cmake/ascent``. - -Compiling Ascent via Spack -^^^^^^^^^^^^^^^^^^^^^^^ -1. Run ``spack external find``. -2. Make sure there are entries listed for ``hdf5``, ``cuda``, and ``openmpi`` in your ``~/.spack/packages.yaml`` file. -3. Add `buildable: False `_ to each entry. -4. Run ``spack fetch --dependencies ascent@develop+cuda+vtkh~fortran~shared cuda_arch=70 ^conduit~parmetis~fortran`` -5. On a dedicated compute node, run ``spack install ascent@develop+cuda+vtkh~fortran~shared cuda_arch=70 ^conduit~parmetis~fortran`` - -For A100 GPUs, change the above lines to `cuda_arch=80`. -Currently, it's not possible to `build for both GPU models at the same time `_. - -Compiling Quokka with Ascent support -^^^^^^^^^^^^^^^^^^^^^^^ -1. Load Ascent: ``spack load ascent`` -2. Add ``-DAMReX_ASCENT=ON -DAMReX_CONDUIT=ON`` to your CMake options. -3. Compile your problem, e.g.: ``ninja -j4 test_hydro3d_blast`` - -Customizing the visualization -^^^^^^^^^^^^^^^^^^^^^^^ -Add an `ascent_actions.yaml file `_ to the simulation working directory. -This file can even be edited while the simulation is running! - -.. warning:: Volume renderings do not correctly handle ghost cells (`GitHub issue `_). +There are several ways to post-process the output of Quokka simulations. +AMReX PlotfileTools, yt, and VisIt all allow you to analyze the outputs after they are written to disk. AMReX PlotfileTools ----------------------- @@ -80,7 +48,15 @@ For details, see the `yt documentation on reading AMReX data