fsfod

7 ms·

31.
by fsfod 6y ago
The 2gb limit has been fixed for a many years now with the GC64 mode that was set to the default build mode last year.
32.
by fsfod 6y ago
Grub also has an optional module run to Lua code https://git.savannah.nongnu.org/cgit/grub-extras.git/tree/lu...
33.
by fsfod 6y ago
Are you gonna use the LuaJIT C VM RaptorJIT is working on https://github.com/raptorjit/raptorjit/pull/254 as a base to start from. I'm also big fan of the LuaJIT compiler explorer you made https:/&
34.
by fsfod 6y ago
It may not be exactly the same but Terra http://terralang.org/ uses Lua a meta programming language and the Terra language itself is effectively a typed Lua compiled to machine code with LLVM.
35.
by fsfod 7y ago
There is no 2GB limit if LuaJIT built in GC64 mode. It was an opt-in build time option until 13 days ago now its on default for 64 bit builds https://github.com/LuaJIT/LuaJIT/commit/bd00094c3b50e193fb32...
36.
by fsfod 7y ago
The last time Mike Paul pushed anything is almost a year ago until two weeks ago based on the two RSS feeds I use. The Git commit dates could be unreliable from either cherry-pick shenanigans or him just not bothering to push the changes un
37.
by fsfod 7y ago
Some of the design of decisions that lead AVX512 are explained in these slides from Tom Forsyth http://tomforsyth1000.github.io/papers/LRBNI%20origins%20v4%... One of the reasons mentions is 512 bits is the same size a
38.
by fsfod 7y ago
In theory you could do it directly with the intrinsic system I built for LuaJIT[1]. It would dynamically generated the assembly for a user declared intrinsic\arbitrary machine opcode when there first called in the interpreter and the opcode
39.
by fsfod 7y ago
That's kind of one of the main uses of the API so far by QEMU for live migration of VMs by streaming memory on demand over a network https://wiki.qemu.org/Features/PostCopyLiveMigration
40.
by fsfod 7y ago
The write protected mode[1], if it ever gets merged could have some interesting uses for GCs. [1] https://lore.kernel.org/patchwork/cover/1033856/
41.
by fsfod 7y ago
Its disappointing that AMD didn't bother to implement the 15H CPUID leaf that Intel added years ago to get the exact CPU TSC frequency. Yet AMD cared enough to add there own instruction(RDPRU) to get the values of APERF and MPERF in us
42.
by fsfod 7y ago
Clang\LLVM has some heuristics where it will convert cmovs generated by earlier passes back in to jumps https://reviews.llvm.org/D34769 . Also the compilers can't always prove its safe to evaluate both sides of a ternar
43.
by fsfod 7y ago
They did start out with a shared atom model for all three platforms but switched away from to separate implementations for ELF and COFF http://lists.llvm.org/pipermail/llvm-dev/2015-May/085088.htm...
44.
by fsfod 7y ago
The effect still exists in some way in later version windows like the Windows Volume Mixer will freeze up or won't open if you have an application stopped at a breakpoint. I think it gets stuck waiting for a reply from something like W
45.
by fsfod 8y ago
As the co-author of that blog post a more accurate tl;dr would be the variance comes from shared hot counters that collide based on the address of objects.
46.
by fsfod 10y ago
There are some ugly hacks[0] to run 64 bit code in a 32 bit process on windows by using retf switch to 64 bit code segment with one of the major limitations being you can't load 64 dlls into the process. [0]: http://blog.rew
47.
by fsfod 10y ago
Well someone was crazy enough to port LuaJIT to run in the FreeBSD kernel including the JIT by the looks of it. http://dl.acm.org/citation.cfm?id=2818305 http://ake.in.th/2016/01/09/til-there-
48.
by fsfod 10y ago
This seems to be the post it was referring to http://lua-users.org/lists/lua-l/2011-02/msg00742.html
49.
by fsfod 10y ago
I remember Andy Glew discussing a little bit of the history of the behaviour of REP MOVS microcode in the comments of this stack overflow question http://stackoverflow.com/questions/8858778/why-are-complicat...
50.
by fsfod 10y ago
While trying to implement the new LuaJIT GC one of the things I tested adding early on was support for explicitly creating arenas from Lua and setting the 2 active arenas allocations happen from to support this kind of allocation patten. Th