ompi
Allegro
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ompi | Allegro | |
---|---|---|
10 | 24 | |
2,016 | 1,759 | |
3.3% | 1.5% | |
9.7 | 8.3 | |
1 day ago | 5 days ago | |
C | C | |
GNU General Public License v3.0 or later | GNU General Public License v3.0 or later |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
ompi
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Ask HN: Does anyone care about OpenPOWER?
The commercial Linux world (see https://github.com/open-mpi/ompi/issues/4349) and other open source OSes (eg FreeBSD) seem to have lined up behind little-endian PowerPC. IBM still has a big-endian problem with AIX, IBM i, and Linux on Z.
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Announcing Chapel 1.32
Roughly, the sets of computational problems that people used (use?) MPI for. Things like numerical solvers for sparse matrices that are so big that you need to split them across your entire cluster. These still require a lot of node-to-node communication, and on top of it, the pattern is dependent on each problem (so easy solutions like map-reduce are effectively out). See eg https://www.open-mpi.org/, and https://courses.csail.mit.edu/18.337/2005/book/Lecture_08-Do... for the prototypical use case.
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How much are you meant to comment on a code?
One of the guys at the local LUG is one of the lead maintainers of Open MPI. He told us about a comment that ran into the hundreds of lines, all for a one-line change in the code.
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Which license to choose when you want credit
But it would be very inconvenient to have to keep crediting everyone who's ever worked on it. If you look at old projects, their licenses can have like 10-20 of those lines (here's one I was recently looking into).
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First True Exascale Supercomputer
I have a bit of experience programming for a highly-parallel supercomputer, specifically in my case an IBM BlueGene/Q. In that case, the answer is a lot of message passing (we used Open MPI [0]). Since the nodes are discrete and don't have any shared memory, you end up with something kinda reminiscent of the actor model as popularized by Erlang and co -- but in C for number-crunching performance.
That said, each of the nodes is itself composed of multiple cores with shared memory. So in cases where you really want to grind out performance, you actually end up using message passing to divvy up chunks of work, and then use classic pthreads to parallelize things further, with lower latency.
Debugging is a bit of a nightmare, though, since some bugs inevitably only come up once you have a large number of nodes running the algorithm in parallel. But you'll probably be in a mainframe-style time-sharing setup, so you may have to wait hours or more to rerun things.
This applies less to some of the newer supercomputers, which are more or less clusters of GPUs instead of clusters of CPUs. I imagine there's some commonality, but I haven't worked with any of them so I can't really say.
[0] https://www.open-mpi.org/
- Managing parallelism by process vs by machine
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MPI + CUDA Program for thermal conductivity problem
I would suggest using OpenMPI because it's pretty easy to get started with. You can build OpenMPI with CUDA support, then you can pass device pointers directly to MPI_Send and MPI_Recv. Then you don't have to deal with transfers and synchronization issues.
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Distributed Training Made Easy with PyTorch-Ignite
backends from native torch distributed configuration: nccl, gloo, mpi.
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FEA computer simulation question
I use a linux ubuntu machine with MPI (https://www.open-mpi.org/). I had a question on making my computer simulations faster. Would be better to get an older AMD 9590 machine clocked at 4.7 ghz or continue using my Ryzen 7 1700 machine clocked at something like 3.5ghz?
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C Deep
OpenMPI - Message passing interface implementation. BSD-3-Clause
Allegro
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Not only Unity...
Allegro (zlib/plain C) https://github.com/liballeg/allegro5
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Allegro library website redirected to anti-Kotaku Nazi-related page
Some nutjob has taken control of https://liballeg.org to redirect it to some anti-Nazi page that mentions Kotaku, comparing them to nazis.
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Self taught developers, what did you know when you started?
C, C++, Allegro, SDL, Some rudimentary SQL, Some basic BSD Sockets. But I also took some time to learn 3D math, trigonometry and linear algebra so I can include some basic 3D examples in my portfolio. I was later told that it was the 3D math that made the difference because if I (barely finished HS) can do that I can probably learn everything they give me.
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Recourses to make games like they did in the 90s?
Wow, DJGPP and Allegro (still going!), that takes me back - that and Bloodshed IDE were my weapons of choice back then!
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What are some of your favourite tools/libraries/frameworks to visualize or prototype something
liballeg.org
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Looking for a very basic 2d graphics library
allegro 5 is quite alright with fonts
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What are some cool modern libraries you enjoy using?
allegro5 is a great rendering library if you want to get something 2D on the screen fast
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Are there other examples of people who made games with their own engines like Minecraft ?
Hell, their website says in the first few sentences it isn't an engine.
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Where to start?
A while ago I was getting started with the Allegro5 game engine (+Rust bindings). It's the same engine used for Factorio. I wrote a simple egui-integration to have nicer UI options. It was mostly for myself and is thus poorly documented but maybe you get some ideas how to make it work.
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Resources for C++
Here's a simple program using Allegro
What are some alternatives?
gloo - Collective communications library with various primitives for multi-machine training.
raylib - A simple and easy-to-use library to enjoy videogames programming
Redis - Redis is an in-memory database that persists on disk. The data model is key-value, but many different kind of values are supported: Strings, Lists, Sets, Sorted Sets, Hashes, Streams, HyperLogLogs, Bitmaps.
Cocos2d - Cocos2d-x is a suite of open-source, cross-platform, game-development tools utilized by millions of developers across the globe. Its core has evolved to serve as the foundation for Cocos Creator 1.x & 2.x.
NCCL - Optimized primitives for collective multi-GPU communication
GLFW - A multi-platform library for OpenGL, OpenGL ES, Vulkan, window and input
FlatBuffers - FlatBuffers: Memory Efficient Serialization Library
Godot - Godot Engine – Multi-platform 2D and 3D game engine
libvips - A fast image processing library with low memory needs.
Spring RTS game engine - A powerful free cross-platform RTS game engine. - Report issues at https://springrts.com/mantis/
SWIFT - Modern astrophysics and cosmology particle-based code. Mirror of gitlab developments at https://gitlab.cosma.dur.ac.uk/swift/swiftsim
Oxygine - Oxygine is C++ engine and framework for 2D games on iOS, Android, Windows, Linux and Mac