Alankar Dutta dutta-alankar
dutta-alankar
/ gadget4_halo_cross_match.py
Created
February 1, 2026 23:42
Cross match properties across snaps in `Gadget 4` cosmo sim halos
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| #!/bin/python3 | |
| # -*- coding: utf-8 -*- | |
| """ | |
| Created on Sat Jan 31 13:23:48 2026 | |
| @author: alankar. | |
| Usage: time python tag-halos.py | |
| """ | |
| import numpy as np |
dutta-alankar
/ parallel-sort-pow-2.py
Created
January 29, 2026 12:55
Parallel sorts a distributed array using MPI (works only when total processor count is 2^N)
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| #!/bin/python3 | |
| # -*- coding: utf-8 -*- | |
| """ | |
| Created on Sat Jan 29 13:15:48 2026 | |
| @author: alankar. | |
| Usage: time python parallel-sort.py | |
| """ | |
| from mpi4py import MPI |
dutta-alankar
/ parallel-sort.py
Last active
January 29, 2026 12:53
Parallel sorting of a distributed array using MPI
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| #!/bin/python3 | |
| # -*- coding: utf-8 -*- | |
| """ | |
| Created on Sat Jan 29 13:34:48 2026 | |
| @author: alankar. | |
| Usage: time python parallel-sort-arb.py | |
| """ | |
| from mpi4py import MPI |
dutta-alankar
/ field-length-sim.py
Last active
January 28, 2026 16:34
Field length calculation in sims
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| #!/bin/python3 | |
| # -*- coding: utf-8 -*- | |
| """ | |
| Created on Tue Jan 27 11:54:48 2026 | |
| @author: alankar. | |
| Usage: time python lF-res.py | |
| """ | |
| import numpy as np |
dutta-alankar
/ create-duplicate-xmf.py
Created
January 23, 2026 08:09
Create a set of `xmf` files at a different location that can refer to the original `hdf5` files
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| #!/bin/python3 | |
| # -*- coding: utf-8 -*- | |
| """ | |
| Created on Sat Jan 23 09:06:48 2026 | |
| @author: alankar. | |
| Usage: time python create-duplicate-xmf.py <source_dir> <dest_dir> <last_file_number> | |
| """ | |
| import os |
dutta-alankar
/ mass-cold+dense-color-time.svg
Last active
October 16, 2025 10:53
A plot of mass as a function of distance colored by time (see Fig. 8 from paper Fading in the Flow; MNRAS for an alternate version)
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| ! Use a nice truetype font and size by default... | |
| xterm*faceName: DejaVu Sans Mono Book | |
| xterm*faceSize: 22 | |
| ! Every shell is a login shell by default (for inclusion of all necessary environment variables) | |
| xterm*loginshell: true | |
| ! I like a LOT of scrollback... |
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| #!/bin/bash | |
| # Standard output and error: | |
| #SBATCH -o ./tjob.%x.out.%j | |
| #SBATCH -e ./tjob.%x.err.%j | |
| #SBATCH --job-name="CCtest" | |
| # | |
| # Number of nodes and MPI tasks per node: | |
| #SBATCH --nodes=15 | |
| #SBATCH --ntasks-per-node=40 |
dutta-alankar
/ stencil-demo.chpl
Created
June 24, 2025 08:19
Demonstration of stencil distribution on Chapel
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| import StencilDist.stencilDist; | |
| import StencilDist.boundaries; | |
| const side_low = 1; | |
| const side_high = -1; | |
| config const n = 10; | |
| config const nghost = 2; | |
| config const periodic = false; | |
| const Space = {1..n}; | |
| const AllSpace = Space.expand((nghost,)); |
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| #!/bin/bash | |
| module purge && module load gcc/11 openmpi/4 hdf5-mpi/1.14.1 gsl/2.7 fftw-mpi/3.3.9 | |
| export LD_LIBRARY_PATH="/mpcdf/soft/SLE_15/packages/skylake/openmpi/gcc_11-11.2.0/4.0.7/lib:$LD_LIBRARY_PATH" | |
| export LD_LIBRARY_PATH="/mpcdf/soft/SLE_15/packages/skylake/gsl/gcc_11-11.2.0/2.7.1/lib:$LD_LIBRARY_PATH" | |
| export LD_LIBRARY_PATH="/mpcdf/soft/SLE_15/packages/skylake/fftw/gcc_11-11.2.0-openmpi_4-4.0.7/3.3.9/lib:$LD_LIBRARY_PATH" | |
| export LD_LIBRARY_PATH="/mpcdf/soft/SLE_15/packages/skylake/hdf5/gcc_11-11.2.0-openmpi_4-4.0.7/1.14.1/lib:$LD_LIBRARY_PATH" | |
| export GADGET4_DIR="/orion/ptmp/adutt/arepo-multi-zoom/gadget-files/gadget4_development" | |
| export PROB_DIR="/orion/ptmp/adutt/arepo-multi-zoom/gadget-files/gadget4_development/examples/multi-zoom/zoom" |
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