qemu
CLK
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qemu
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QEMU AioContext removal and how it was done
https://gitlab.com/qemu-project/qemu/-/blob/master/hw/scsi/s...
QEMU's IOThreads allow the user to configure the threads and get something similar to thread per core architecture. But if 1 thread becomes a bottleneck, then some form of thread synchronization is needed again even with thread per core architecture. Some problems can be parallelized and they work well with thread per core.
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Why are Apple Silicon VMs so different?
Add `ENV ERL_FLAGS="+JPperf true"` to your Dockerfile and it will build just fine cross platform. The flag just changes some things during build time and won’t affect runtime performance.
[1] https://gitlab.com/qemu-project/qemu/-/issues/1034
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RISC-V Vector benchmark results
> I don't know how rdcycle works on qemu.
That's a good question! I had to look it up myself ...
Obviously qemu TCG isn't a cycle-accurate emulation. Using RDCYCLE / reading the corresponding CSR eventually calls https://gitlab.com/qemu-project/qemu/-/blob/69680740eafa1838... which calls cpu_get_host_ticks is basically an arch-independent wrapper around RDTSC.
So it just measures the time taken to run using RDTSC. Which I guess is what you would want (maybe?). It would measure the time taken to emulate the vector instruction in host instructions.
> This benchmark is more meant for developers to figure out how to vectorize algorithms effectively, as in which instructions to choose.
Absolutely, I'm not saying the qemu results would say anything very deep, but they're kind of interesting from the point of view of either optimizing qemu or if you have to use qemu because the hardware you want isn't available / isn't cheap enough.
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The IMPOSSIBLE RISCV HACK: Vector Extension 0.7.1-draft w/ current Linux kernel! – René Rebe
I see the commits that started switch support from RVV 071 to 100 start here, https://gitlab.com/qemu-project/qemu/-/commit/9ec6622db30df1c00d863c1ffc33341f9e0a534d
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I booted Linux 292,612 times
>> https://gitlab.com/qemu-project/qemu/-/issues/1696 ]
> Can I please just get the detail in mail instead of having to go look at random websites?
Maybe it's me but if I did boot boot linux 292.612 times to find a bug, you might as well click a link to a repository of a major open source project on a major git hosting service.
Is it really that weird to ask people online to check a website? Maybe I don't know the etiquette of these mail lists so this is a geniune question.
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Rise: Accelerate the Development of Open Source Software for RISC-V
Capstone is used[1] by QEMU as disassembly engine in debug logs and in monitor mode debugger, by the way, so it's in the scope of the RISE effort.
[1] https://gitlab.com/qemu-project/qemu/-/blob/master/disas/cap...
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Intel Arc 750 Crashes Host + Display Cable Workaround not needed anymore (Windows)
A user on the qemu bugtracker found a way to get the Intel Arc working across resets without crashing the host: Just don't passthrough the audio device of the GPU and everything works!
- Qemu 7.2.2: command line syntax in libvirt domain changed
- Anyone know if there's a way to disable ReBar on only one GPU?
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[RFT] Allow QEMU to expose static REBAR capability
[1]https://gitlab.com/qemu-project/qemu/-/commit/3412d8ec9810b819f8b79e8e0c6b87217c876e32 [2]https://gitlab.com/alex.williamson/qemu/-/commit/9a6d1822a2bd55f5dee1aec1b6529ae57949d5ba.patch
CLK
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Bit random but does anyone know how possible it is to get this look within Stella? [Pallete/TV Effects].
Not Stella, but the Clock Signal emulator does a great job of emulating the TV effects. The 2600 emulation isn't quite as good as Stella, though.
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Giveaway: Mac Plus with Hard Disk 20 - Chicago area
I’ll be visiting Chicago on the 9th for a single night, and the author of this Mac Plus emulator which attempts to be cycle-accurate and therefore it’d be really great to have a real machine to test against… but I’m clueless at electrical work. So factor that in re: the retirement that the machine be used by its direct recipient.
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Of the more rarely seen here: the Apple II, why not?
The repository is here; binary releases for the Mac are in the appropriate section though HDV support and a few other relevant tweaks haven’t made it into a release yet so you can’t yet run Total Replay as shown. You’d probably need to use disk images.
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Looking for target for next project
Caveats being stated: https://github.com/tomharte/CLK
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Vi-mode for your Apple II prompt
Thanks for the confirmation! I just wrote an Issue. I hope Tom gets it sorted out. I normally use OpenEmulator on the Mac but I like the simplicity of CLK and would like to make it my main emulator.
- Clock Signal: an emulator for tourists that seeks to be invisible
- TomHarte/CLK: A latency-hating emulator of 8- and 16-bit platforms: the Acorn Electron, Amstrad CPC, Apple II/II+/IIe and early Macintosh, Atari 2600 and ST, ColecoVision, Enterprise 64/128, Commodore Vic-20 and Amiga, MSX 1, Oric 1/Atmos, Sega Master System, Sinclair ZX80/81 and ZX Spectrum.
- Clock Signal ('CLK') is an emulator for tourists that seeks to be invisible
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But does it run Doom? Ummm, not exactly.
It's available via GitHub but fair warning: it's a large project and is the one I used to learn modern C++ so some of the older parts of it aren't fantastic.
What are some alternatives?
gcc
zx-sizif-512 - ZX Spectrum CPLD-based clone for rubber case
riscv-binutils-gdb - RISC-V backports for binutils-gdb. Development is done upstream at the FSF.
GBA - Game Boy Advance Bare Metal Assembly Programming
nbdkit
gb-test-roms - Collection of Game Boy test roms.
safeclib - safec libc extension with all C11 Annex K functions
decaf-emu - Researching Wii U emulation.
lzbench - lzbench is an in-memory benchmark of open-source LZ77/LZSS/LZMA compressors
moa - An emulator for various m68k and z80 based computers, written in Rust. Currently it has support for the Sega Genesis, TRS-80, and Computie (my own project), with Macintosh support in the works
riscv-gnu-toolchain - GNU toolchain for RISC-V, including GCC
rlengine-msx1 - RetroDeluxe Game Engine for MSX computers