dpzmick

6 ms·

1.
by dpzmick 5y ago
> If so, what's y̶o̶u̶r̶ a use-case? CERN uses PTP on steroids for physics experiments: https://white-rabbit.web.cern.ch/
2.
by dpzmick 5y ago
I believe there's a hint towards the end of the article: > Note: Perlmutter’s “AI performance” is based on Nvidia’s half-precision numerical format (FP16 Tensor Core) with Nvidia’s sparsity feature enabled. FP16 is a 16 bit floating
3.
by dpzmick 6y ago
similar boxes are on amazon, with worse(ish) specs under the brand "Protectli "
4.
by dpzmick 6y ago
this is a reasonable test: https://www.cs.virginia.edu/stream/ref.html but it's pretty straightforward to just copy giant buffers in order/out of order and squint really hard at the results
5.
by dpzmick 6y ago
I too was confused by this. Bad naming!
6.
by dpzmick 6y ago
I'm another user of the predecessor to Conducto. We're using it to orchestrate very large regression test (usually ~40-50k independent processes run as part of the regression testing). I also use conducto's predecessor to man
7.
by dpzmick 7y ago
I've been going with this style for things like reading files (with retries) or any sort of loop that feels awkward. while (1) { int ret = ...; if (ret == ...) break; if (ret == some_other_condition) break; /&#
8.
by dpzmick 7y ago
in C, it items[0] could segfault, the fault could be caught by a signal handler which does some unbounded amount of work, then populates the appropriate memory location and returns... More realistically, the page of memory that items[0] is
9.
by dpzmick 8y ago
Another option for interesting generative art would be generative music. There's tons of opensource audio/music generation software (ChucK, supercollider/overtone, csound, vcvrack), and there's a fun (expensive) world of
10.
by dpzmick 9y ago
Very little is done with these values in the fast path. The application in question is basically a smart proxy that performs a very minimal amount of formatting. Most of the code in the fast path is pretty linear so I was curious if there w
11.
by dpzmick 9y ago
Try compiling with c++11 turned on.
12.
by dpzmick 9y ago
In this case, yes, optimizations don't appear to be giving me much of a win. Although, I'm very glad I checked! There are certainly some very realistic scenarios in which it would be valuable to save this branch.
13.
by dpzmick 9y ago
In this case I don't think that being clever can actually help us much. I have some microbenchmarks towards the end of the post that are not very indicative of any performance gained by writing this "clever" code.
14.
by dpzmick 9y ago
In the real world version of this problem the padding bytes contain some real values and the structs are both written straight to a network line (protocol is defined externally)
15.
by dpzmick 9y ago
Thanks! I started with a fork of this Jekyll site: https://github.com/johnotander/pixyll so I can't take much credit for the design
16.
by dpzmick 9y ago
I'll give that benchmark trick a try. Thanks for the feedback. For some additional context, these structs are packed wire-line protocol structs. In reality the padding bytes are full of other fun details.
17.
Outsmarting the compiler: Short story about optimization(dpzmick.com)
67 points by dpzmick 9y ago|24 comments
18.
Outsmarting the compiler: Short story about optimization(dpzmick.com)
3 points by dpzmick 9y ago|0 comments
19.
HN browser in Kakoune(github.com)
4 points by dpzmick 10y ago|0 comments
20.
Rust image processing DSL with llvm(dpzmick.com)
4 points by dpzmick 10y ago|0 comments
21.
Macros for straightforward parallelism in Clojure [pdf](dpzmick.com)
4 points by dpzmick 10y ago|0 comments
22.
Using GNU Make to automate student code creation(dpzmick.com)
4 points by dpzmick 11y ago|0 comments
23.
Agile with a little 'a' – sometimes forget what Agile is all about(devopslamb.wordpress.com)
5 points by dpzmick 11y ago|0 comments