bremac

6 ms·

1.
by bremac 2y ago
Location: San Francisco, CA Remote: Yes Willing to relocate: Yes Technologies: Java, C, C++, SQL, Python, Kubernetes, Linux, perf, PostgreSQL, OCaml Résumé/CV: http://macdonell.net/resume.pdf Email: brendan@macdonell.n
2.
by bremac 2y ago
Location: San Francisco, CA Remote: Yes Willing to relocate: Yes Technologies: Java, C, C++, SQL, Python, Kubernetes, Linux, perf, PostgreSQL, OCaml Résumé/CV: http://macdonell.net/resume.pdf Email: brenda
3.
by bremac 2y ago
Unfortunately none of the hardware used for testing supports FP16 arithmetic. Between Intel and AMD, the only platform that supports AVX512-FP16 is currently Sapphire Rapids.
4.
Correctly-rounded evaluation of a function: why, how, and at what cost? [pdf](hal.science)
2 points by bremac 2y ago|0 comments
5.
by bremac 2y ago
Value types still require allocation for types larger than 128 bits if the value is either nullable or atomic — that seems like a reasonable trade-off to me.
6.
by bremac 2y ago
Keep in mind that you still need send a print job to the fake printer to trigger the exploit. If you send the job to your real printer, nothing happens.
7.
by bremac 3y ago
Per the bug report, all versions since Java 8 are affected.
8.
by bremac 3y ago
Unfortunately, unless the JIT can prove that the address you are accessing via the segment is non-negative, it can't elide the bounds check. See https://mail.openjdk.org/pipermail/panama-dev/2023-July/019
9.
by bremac 3y ago
As the comment you replied to indicates, both of those APIs perform bounds-checking. In certain tight loops, this can add up to quite a bit of overhead [1]. However, it's not documented, but if you really know what you are doing you ca
10.
by bremac 3y ago
Reading between the lines, it sounds as if they're using mmap. There is no "append" operation on a memory mapping, so the file would need to be preallocated before mapping it. If the preallocation is done using fallocate or j
11.
by bremac 3y ago
I think you may have linked to the wrong graph — while that graph does have a spike on it, the spike happens when the index was broadened in May 2020 to include savings and money market accounts.
12.
by bremac 4y ago
Thanks for mentioning this, I couldn't think of where I'd read about this technique before. I was remembering https://webkit.org/blog/6161/locking-in-webkit/
13.
by bremac 4y ago
I think that the answer here is "not easily". To use the x32 ABI, you would need: 1. Kernel support to be enabled in order to make x32 system calls. Checking /proc/config.gz on Arch Linux, my kernel does not appear to ha
14.
by bremac 4y ago
> If you allocate a chunk on the heap with 8-byte alignment, then you can throw away the lowest 3 bits of precision, and then you can address 32GB with a 32-bit pointer. This part is totally doable, and in fact it's one of the point
15.
by bremac 4y ago
-m32 doesn't target the x32 ABI though, it targets x86. Per the manual: > The -m32 option sets int, long, and pointer types to 32 bits, and generates code that runs on any i386 system. That restricts you to the smaller register set,
16.
by bremac 4y ago
I'm unsure about library support, but gcc and clang support function multi-versioning (FMV), which resolves the function based on CPUID the first time the function is called. This LWN article has some additional information: https:&#x
17.
by bremac 4y ago
> but interests of corporate mega producers they can't guarantee such thing at scale. So to protect them and people from them these laws are made kind of impossible triangle. In North America, many of these laws were passed in the e
18.
by bremac 4y ago
As someone who grew up on a dairy farm, who worked on a farm, and who has friends and family operating their own farms, I'd like to point out that this is backwards. Farmers know that bacteria can make them sick or even kill them. It&#
19.
by bremac 4y ago
As much as I am not a fan of Applebee's, the article title on HN should probably be fixed. The executive who sent the email works for Apple Central, a mid-sized franchisee with less than fifty locations. They do not work for Applebee&#
20.
by bremac 5y ago
The internet is the least of your problems. The key industrial automation equipment (PLCs and IPCs) is connected directly to your machines. Higher-level control and planning functions like MES and SCADA are usually running from your server
21.
by bremac 5y ago
If Putin presses on toward Poland or threatens the Baltics, then we will be on a knife's edge. However, for now, Russia has only invaded Ukraine. It's a humanitarian disaster, but so far on the world stage it shows no sign it will
22.
by bremac 5y ago
That's rather hyperbolic. Article 4 has been invoked six times since 2003 (including in response to the Crimean invasion.) None of those cases triggered World War III.
23.
by bremac 5y ago
The legislature in my home province is closed to the public due to threats: https://www.cbc.ca/news/canada/nova-scotia/security-risk-clo... Several MPs and MLAs have received suspicious packages: https:&#x2F
24.
by bremac 5y ago
As I recall, the context of those comments was in response to a purported attempt to fast-track any vaccine to be ready prior to the election. The Washington Post appears to have the same recollection [1]. [1] https://www.washing
25.
by bremac 5y ago
For what it's worth, Peter wrote this a little more than a year before he died due to metastatic cancer. I suspect he understood quite well that time is finite.
26.
by bremac 5y ago
> The modern linux kernel doesn't actually write to disk when fsync is called. It buffers the writes in a cache. Do you have a reference for this? That would break every ACID database that I'm aware of, including sqlite and pos
27.
by bremac 6y ago
In the case of Ruby, it's not really trying to be smart. Ruby loads everything into a single namespace, so loading multiple versions of the same dependency could cause classes, modules, etc. from version 1.1 to overwrite those already
28.
by bremac 6y ago
13F filings don't include short positions. Given how shorted GME is, I don't think it's surprising that the total long positions exceeds the number of shares outstanding. To add to the confusion we're still within the 45
29.
by bremac 6y ago
The .net benchmarks use architecture-specific SIMD intrinsics. There's no equivalent on the JVM, though JEP 338 aims to add a vector API.
30.
by bremac 8y ago
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