AMReX Astrophysics Suite

AMReX Astrophysics Suite: CASTRO, MAESTROeX, and Nyx
parallel (CPU and GPU) astrophysics simulation codes.

[ALCF @argonne_lcf]

Led by @argonne's Salman Habib, @exascaleproject's ExaSky project has been working to prepare the HACC and Nyx cosmological simulation codes for @doescience's #exascale supercomputers to help advance our understanding of dark matter and dark energy.

https://t.co/0mmYrTiJsH

[Bronson Messer @thebron]

Hi @kernhendricks! Thanks for the shout-out for #Summit @OLCFGOV!

But... Summit has never been used to "model nuclear weapons blasts." Never will be. We do love thermonuclear explosions, but we like them on neutron stars and white dwarfs. e.g. @Michael_Zingale #OpenScience

[AMReX Astrophysics Suite @AmrexAstro]

@LBNLcs @BerkeleyLab @luc_vay @axccl @exascaleproject @TheOfficialACM @LBNLatap @NERSC @OLCFGOV @doescience @CEA_France congrats to the WarpX folks for the Gordon Bell award!!

[Berkeley Lab Computing Sciences Area @LBNLcs]

Congrats 🎉 @BerkeleyLab's @luc_vay, @axccl & @exascaleproject's Warp-X team on winning @TheOfficialACM's Gordon Bell prize!

About their work: https://t.co/ZRdvjEuVdD
Podcast about #HPC contributions: https://t.co/e5Itm1x3wa

@LBNLatap @NERSC @OLCFGOV @doescience @CEA_France

[AMReX Astrophysics Suite @AmrexAstro]

Our latest paper on coupling hydrodynamics and reactions is now out:
https://t.co/a2cFzXL9yJ

[AMReX Astrophysics Suite @AmrexAstro]

Castro Fortran -> C++ conversion (percentage vs year.month)

[Berkeley Lab Computing Sciences Area @LBNLcs]

What's #DarkMatter matter made of? Nobody knows. But new research from @BerkeleyLab scientists, supported by @NERSC #HPC, narrows the search for the axion particle, a promising candidate.

Read: https://t.co/wwmCpNZrcu

@doescience @ENERGY @AmrexAstro @LBNLphysics #astrophysics

[AMReX Astrophysics Suite @AmrexAstro]

The 22.07 version of our AMReX-Astro were just tagged. New for the Microphysics suite is 2 additional screening formulations for nuclear reactions, based on Chugunov 2007 and 2009. Also some fixes for ROCm 5.x.

[AMReX Astrophysics Suite @AmrexAstro]

Castro 22.06 has been released:
https://t.co/0aV0MnkmBb

[AMReX Astrophysics Suite @AmrexAstro]

Two AMReX Astro talks at the JINA Frontiers Meeting this week: Eric Johnson talking about X-ray bursts with Castro and Alex Smith Clark talking about our reaction network infrastructure with pynucastro + Castro/C++ generation.

[AMReX Astrophysics Suite @AmrexAstro]

Castro 22.05 has been released
https://t.co/1cq27iIr8B

A cool new feature is that we now dynamically adjust the tile size in hydro when offloading to GPUs to reduce the memory size of temporaries (helps prevent oversubscription of GPU memory)

[AMReX Astrophysics Suite @AmrexAstro]

Our Castro GPU performance at @OLCFGOV summit keeps improving

[Richard Gerber @ragerber]

Science @NERSC: Berkeley Lab Computing Resources Enable Deeper Understanding of Supernovae Explosions https://t.co/17ibkE2RWB via @NERSC

[AMReX Astrophysics Suite @AmrexAstro]

of course, all of this runs on GPUs as well, with both Castro and MAESTROeX.

[AMReX Astrophysics Suite @AmrexAstro]

just merged: we now use C++ templating and constexpr-if to generate our nuclear reaction networks at _compile time_, from a simple set of meta-data

https://t.co/tXCc1lTtug

[AMReX Astrophysics Suite @AmrexAstro]

this is one of the nice things enabled by our conversion from Fortran to C++ (since Fortran at the moment, doesn't have the equivalent generic programming constructs).

[Kaley Brauer 💫 @kaleybrauer]

@sanjanacurtis @Michael_Zingale if you don’t have a mug have you even used Castro?

[AMReX Astrophysics Suite @AmrexAstro]

Castro 22.02 has been released:
https://t.co/0lDNlUQafo

Castro now runs on AMD GPUs using ROCm (>= 4.5) + HIP (in addition to NVIDIA GPUs with CUDA).

We are continuing to optimize our performance on AMD GPUs.