AbacusAvenger

8 ms·

31.
by AbacusAvenger 8y ago
I had the same question. Apparently there are a couple of commands to look at: fltmc filters That shows the filters loaded, and presumably the ones with "num instances" of 0 aren't actually in use on any volumes. You c
32.
by AbacusAvenger 8y ago
I saw that too. There's a menu option to disable it.
33.
by AbacusAvenger 8y ago
I don't remember the exact numbers (this was 2011), but the overhead of using e.g. CLOCK_MONOTONIC were substantial. Under Xen, the cost of reading CLOCK_MONOTONIC was a few orders of magnitude higher than reading the TSC. I think on X
34.
by AbacusAvenger 8y ago
This is exactly why I wrote the "clockperf" tool during the time I was working at AWS: https://github.com/tycho/clockperf At the time, we were trying to benchmark disk I/O for new platforms, but we found
35.
by AbacusAvenger 8y ago
Usually when something is reported as being a distribution bug, it's because they have some patch specific to their packages that causes the issue. Is that not the case here? Are other distrbutions affected right now?
36.
by AbacusAvenger 8y ago
I agree those features sound great. But it's difficult to practically use AVX-512 when the turbo boost throttling prohibits breaking even with an equivalent AVX/AVX2 workload. I had a small project that would trivially scale up
37.
by AbacusAvenger 8y ago
Oh yeah, I remember that! I think they called it "MoodWatch" or something. If I recall right, it gave a live measurement of the composition, so you didn't even have to send an email to play with it. It had a scale of one to t
38.
by AbacusAvenger 8y ago
That's a cynical view, and I don't think I said you should depend on Cache-Control working. Yes, there will be bad actors, but the majority of clients are good actors. It's just one of several measures you should take to
39.
by AbacusAvenger 8y ago
It seems like kind of an unlikely scenario that you'd want to expire content at a specific time. I mean, if someone chooses to do that, they better know what the impact could be. With the Expires header, all clients that retrieved that
40.
by AbacusAvenger 8y ago
Not to mention that Content-Security-Policy can be costly to set up and maintain properly. My servers send both X-Frame-Options and Content-Security-Policy, but I do keep running into cases where my CSP was too restrictive and have to kee
41.
by AbacusAvenger 8y ago
Yeah, that's why I set the "extensions.pocket.enabled" to "false" in my about:config. It's such a weird feature in an otherwise pleasant browser.
42.
by AbacusAvenger 8y ago
My mom certainly does that for me. I try to explain non-intuitive programming concepts to her with analogies, but I don't think I succeed most of the time. I love her dearly for putting up with it, though.
43.
by AbacusAvenger 9y ago
I used the x32 ABI at a previous job, for an ARM-on-x86 emulation project. The x32 ABI outperformed both x86 and x86_64 for that purpose. It wasn't a huge margin, but it was enough to make us want to use it over x86_64. I wish I still
44.
by AbacusAvenger 9y ago
They can track DNS lookups though. I use DNSCrypt to proxy all that traffic through elsewhere. But that just means I'm trusting some other third party to not log my DNS queries.
45.
by AbacusAvenger 9y ago
Yeah, this whole thing seems a bit silly. You can't trust the webcam to be real or even functional. And even if you could trust the entire website-to-webcam path end-to-end, you can't trust the image the hardware is reading. There
46.
by AbacusAvenger 9y ago
You should see "pti" on the "flags" line of /proc/cpuinfo. You apparently don't, so you don't have page table isolation.
47.
by AbacusAvenger 9y ago
Potentially stupid question: What is an SVM? The linked page uses the acronym almost 30 times but doesn't define it.
48.
by AbacusAvenger 9y ago
Can you explain how to do this? I've never seen this functionality before.
49.
by AbacusAvenger 9y ago
Telephone numbers and home addresses change all the time, and communicating the change of this information is a hard problem that requires effort that most people won't put forth. On the other hand, Facebook accounts just stay the same
50.
by AbacusAvenger 9y ago
Atari 130XE, with a bunch of fun game cartridges like Star Raiders
51.
by AbacusAvenger 9y ago
I haven't found any Intel hardware with the SHA extensions actually implemented. I was expecting it in Skylake but apparently that's not the case... Not sure when we can expect to see them.
52.
by AbacusAvenger 9y ago
The Wolfram Alpha results for this one are pretty intimidating: http://www.wolframalpha.com/input/?i=(a%2F(b%2Bc))%2B(b%2F(a...
53.
by AbacusAvenger 9y ago
I've used KeePassXC, and I think it's the best KeePass variant. I don't like stock KeePass because it's horribly slow under Mono (Linux/OS X). And I like but am not as satisfied with KeePassX because it lacks some f
54.
by AbacusAvenger 9y ago
Before I learned about the SKS Keyservers pool, I had my "keyserver hkp://pgp.mit.edu" in my ~/.gnupg/dirmngr.conf, and that never failed for me unless I was in a strangely firewalled environment. Maybe try tha
55.
by AbacusAvenger 9y ago
Keyservers are hosted by volunteers as part of a distributed pool of hosts: https://sks-keyservers.net/ And the pool's automated management infrastructure prunes misbehaving hosts pretty quickly (e.g. not responding, o
56.
by AbacusAvenger 9y ago
It bothers me a bit that the project has weak commit messages like this: https://github.com/sakurity/securelogin/commit/975332ae0b0e2... Literally just "1". Tells me nothing about what's happen
57.
by AbacusAvenger 9y ago
So they implemented AVX512 on the Xeon server parts in microcode? That seems crazy.
58.
by AbacusAvenger 9y ago
I tried AVX512 on a Xeon (non-Phi) part recently and it was extremely underwhelming. The workload (OpenMP-parallelized n-body) was actually slower with AVX512. Since it was under virtualization and I didn't have access to the bare me
59.
by AbacusAvenger 9y ago
The code is more interesting if you -do- actually dereference the pointer, too. I've changed the prototype of "bogus" to take a single char as the first argument, and dereference the two pointers inside the do_arr/do_ptr
60.
by AbacusAvenger 10y ago
The saxpy example is very strange. They clearly show that the left side (gcc -O3) doesn't generate any SIMD code and that their "STOKE" optimizer does. This isn't a fair comparison. All they need to do is add an -march f

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