my123

74 ms·

961.
by my123 6y ago
BSDs traditionally don't have a stable syscall ABI. Windows never had a stable syscall ABI either. Almost only Linux does it... because the kernel and libc are maintained as separate projects in the Linux world.
962.
by my123 6y ago
Ok, on the I2C driver because you are saying that: A separate I2C driver was done because the PA Semi one is polled, not interrupt-driven. Polling to wait on a slow bus such as I2C is brutal. And we don't know if the original PA Semi h
963.
by my123 6y ago
They can boot from external drives, it's just that it's a bit buggy right now.
964.
by my123 6y ago
It's still experimental for USB drives, worked well with a Samsung T7 for me. You'll need to explicitly bless the volume beforehand to boot from an install that was made on another Mac though.
965.
by my123 6y ago
In practice, you can almost never use that for desktop and tablet software. Most of your users would not be able to use the software otherwise, which is not a small problem.
966.
by my123 6y ago
SIMT became an abstraction that was lowered to SIMD at compile time to instead being the abstraction used when targeting the underlying hardware. > Furthermore, the PTX is substantially similar PTX is just a (forwards-compatible) interme
967.
by my123 6y ago
Unlike a vanilla SIMD machine, you can diverge more cheaply when you need to. Scheduler flow control is different from a more conventional masks approach. The underlying implementation is still just lane masking and walking down separate fl
968.
by my123 6y ago
There is no execution mask from the ISA perspective, each thread has its own instruction pointer, and the hardware deals with which threads get executed, instead of a mask being set/unset. I don't know why you continue to argue th
969.
by my123 6y ago
You claimed that SASS was a SIMD instruction set, which is false. (through "NVidia's SASS on Volta is pretty clearly SIMD-instructions") Yes, thread divergence on GPUs can come with performance downsides and is a tool to use
970.
by my123 6y ago
Apart from tensor cores and some compressed instructions on small data types, they are not SIMD instructions. Each individual SIMT lane can actually diverge from the other on the underlying hardware. Active threads are dynamically mapped
971.
by my123 6y ago
It isn't a failure code, EINTR is a code that explicitly tells you to retry.
972.
by my123 6y ago
This EINTR is returned here for attempts at file accesses trapped by an antivirus/security layer, which can indeed take an undetermined amount of time, without the OS knowing how long that is... Probably was a hard choice to make for A
973.
by my123 6y ago
Of Linux *kernel* to userspace ABI development. The user-space ABIs are widely unstable. Try to run software compiled on Ubuntu 20.04 on 18.04 for example. On macOS, it's just the matter of using -mmacosx-version-min= to make sure that
974.
by my123 6y ago
Traditionally, Apple does not guarantee total ABI stability. They push betas instead to allow people to fix the issues, and then support older releases for multiple years. Yes, unmaintained software might or might not stay fully functional
975.
by my123 6y ago
OS X Leopard is very old in Apple terms, released in 2007 and being the last release to support PowerPC processors. (that even pre-dated the functions that you say above being standardised, they were just GNU extensions before) For Vulkan,
976.
by my123 6y ago
getline and fmemopen are both supported on macOS. [/Library/Developer/CommandLineTools/SDKs/MacOSX11.1.sdk/usr/include] -> % grep -r -n getline stdio.h stdio.h:355:ssize_t getline(char \* __re
977.
by my123 6y ago
> Many system calls will report the EINTR error code if a signal occurred while the system call was in progress. No error actually occurred, it's just reported that way because the system isn't able to resume the system call au
978.
by my123 6y ago
Returning EINTR is valid behaviour.
979.
by my123 6y ago
> with SIMD-instructions You assume so, for Volta onwards that's not true. Each SIMT thread on NVIDIA GPUs for Volta onwards has its own instruction pointer. And yes, it's scalar instructions at the ISA level.
980.
by my123 6y ago
Modern NVIDIA GPUs (since Volta) drop that pretence at the ISA level, each thread has its own instruction pointer there. Your GPU ISA is scalar, not vector on modern NVIDIA machines.
981.
by my123 6y ago
Apple doesn't allow subprocesses for 3rd-party apps on iOS generally as far as I know.
982.
by my123 6y ago
Which is dead.
983.
by my123 6y ago
Very interesting... I wonder why they went that way instead of PCIe... (I assumed that TB always meant that PCIe endpoints were used for Thunderbolt)
984.
by my123 6y ago
For an actual Thunderbolt display (contrasted to the DisplayPort alternate mode), the sole DisplayPort controller shouldn't be a limitation, as render offscreen + DMA to the device would work just fine in that case. Think that Apple di
985.
by my123 6y ago
4 Thunderbolt ports, with each pair having a shared bus is what the Mac mini 2018 seems to have.
986.
Thunderbolt on the M1 Mac mini – when 2 equals 4(eshop.macsales.com)
23 points by my123 6y ago|23 comments
987.
by my123 6y ago
You suppose that a bad actor at one point will always stay a bad actor in the future.
988.
by my123 6y ago
It is not OSS if it does that, because you limit what the software can be used for. It becomes just source-available software. Being open-source to get a user base and then change the license isn't that great, they should have started
989.
by my123 6y ago
Some more explanations about the choices taken for the first submission: https://threedots.ovh/blog/2021/01/linux-on-apple-silicon-ma...
990.
by my123 6y ago
Hello, marcan is CCed on that set of patches as a courtesy, and he can help with figuring out better approaches before it's merged. Because it's set in stone forever after that. - someone

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