tudor brindus | DMOJ: Modern Online Judge Management Team

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Tudor Brindus. Sometimes, the kernel lies about process memory usage. Jul 5, 2021 • 9 minutes. Here's a short systems debugging story. On dmoj.ca, we run user-submitted .I'm a founder of the DMOJ, the largest online judge for computer science .Even more about me | Tudor Brindus. If you're in this deep, you're likely either a .Projects. I'm a co-founder of the DMOJ, an open-source online programming .

Ricing the Windows Subsystem for Linux. One of the more exciting pieces of tech .I'm a founder of the DMOJ, the largest online judge for computer science contests in Canada. I graduated from the University of Toronto in 2020, having studied computer science .Even more about me | Tudor Brindus. If you're in this deep, you're likely either a bot or particularly bored. I'm keeping this page around mostly for personal reference, but maybe you might find .Cross-platform C# Nintendo Entertainment System and MOS 6502 CPU emulator. • Supports 90% of all games ever published by emulating over a dozen proprietary hardware.

Judging backend server for the DMOJ online judge. A modern open-source online judge and contest platform system. 📺 Nintendo Entertainment System emulator written in C#. An .sphere2cube is a Python script to map equirectangular (cylindrical projection, skysphere) map into 6 cube (cubemap, skybox) faces. See also cube2sphere.Problem type. "This, might be an online judge, but it isn't meant to be played" - 『Sword Art Online Judge』, Programmers: Guanzhong Chen, Tudor Brindus, Timothy Li.tbrindus (Tudor Brindus) is now on Keybase, an open source app for encryption and cryptography.

Projects. I'm a co-founder of the DMOJ, an open-source online programming contest platform. I also maintain a bunch of projects on my Github profile. I've worked on many dozens of projects over the years, so I've created this page .The DMOJ: Modern Online Judge management team includes Tudor Brindus (Founder, Developer), Carson Tang (Quantitative Developer Intern), and Roger Fu (Admin and Software .

I've been operating a semi-large online judge for the better part of 4 years at the time of writing. People sometimes ask me how it works, so I figured it'd be a worthwhile task to document, in general, what goes into writing an online judge. For ARM servers, I passed --enable-donna to configure, while for x86_64 boxes I used either --enable-amd64-51-30k or --enable-amd64-64-24k, whichever provided the greatest hashrate.. For mining, I specified a filter for tbrindus: $ ./mkp224o -s-T tbrindus At first glance, this seems fairly mild for such a fundamental class. The only thing that appears tricky is the SurfaceData parameter.. Obtaining a SurfaceData. SurfaceData sounds exactly like what one would expect an abstraction of a native surface to be called, and if we dig into its source, it becomes evident that SurfaceData implementations (the class itself is . Here's a short systems debugging story. On dmoj.ca, we run user-submitted solutions to algorithmic programming problems against a set of input files, and judge their output for correctness.One metric by which solutions are ranked on our leaderboards is memory usage. A user recently reported that some code they had submitted was reported as having .

Setting up a VPN on Windows Server for remote access to company resources comes up often enough, and a great deal has been written on the subject online.Howe. In part 1 of this series, I mentioned that the overhead of a pure ptrace-based sandbox is about 10%.In hindsight, this number is very optimistic — it can be as high as 50% for some workloads — but understanding why requires a bit of background on how the judge keeps track of submission time.. In this post, we'll discuss both submission time-keeping, and a . Further Reading. MDN; X-XSS-Protection .you get the idea, a non-standard header that configures XSS auditing in browsers that support it. A browser will check to see if it believes an XSS attack is being performed on the current page load (for example, if a script tag exists as a querystring and appears identically in the DOM), and act based on the value of this .

Of course, we need to make sure that we generate code for all valid permutations of X and Y, but this is easy to do programmatically.. Dispatching Instructions to Macros. At the core of every emulator is a tight loop that increments the program counter, fetches an opcode, and transfers control to the appropriate opcode handler. This should play well with most static site generators. You could build upon this to only purge pages that were changed via a filesystem watching process, and so on — for my purposes, purging everything was acceptable. In the last chapter of this topic, we talked about creating a sandbox for Linux-based systems. On Linux, we have a fine-grained control over untrusted code by intercepting all system calls via the ptrace(2) API. Since a similar API does .

Most programmers have heard jokes about inserting a Greek question mark (;, U+037E) into Java code in place of a semicolon to cause "inexplicable" compilation errors.But, it's too easy to discover. What about something that manifests itself at runtime, but when inspected — either by printing to stdout or through a debugger — shows nothing amiss?Tudor Brindus -- Toronto, Canada Chat with tbrindus Start a chat Your conversation will be end-to-end encrypted. 3 devices. xyene gist inxen post [email protected] post dmoj.ca https dns tbrindus.ca https dns algome.me dns tbrindus*keybase.io. 19MzP8GJtdpFXn32L9fprjPznuXEQg . In a previous installment, we talked about creating a Linux sandbox using the ptrace(2) system call. Today, we'll look at setting up a similar sandbox for macOS. It's a historical fact that the Darwin operating system that macOS relies on was originally forked from FreeBSD.Tudor blinds are a respected independently owned window blind manufacturer operating from a purpose-built factory. We have been producing quality made to measure window blind shades in Northern Ireland for almost twenty years. Throughout this time, we have consistently used only the highest quality components supplied by the leading window .

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Sometimes, the kernel lies about process memory usage. Here's a short systems debugging story. On dmoj.ca, we run user-submitted solutions to algorithmic programming problems against a set of input files, and judge their output for correctness. One metric by which solutions are ranked on our leaderboards is memory usage.I'm a founder of the DMOJ, the largest online judge for computer science contests in Canada. I graduated from the University of Toronto in 2020, having studied computer science (specializing in computer systems).Projects. I'm a co-founder of the DMOJ, an open-source online programming contest platform. I also maintain a bunch of projects on my Github profile. I've worked on many dozens of projects over the years, so I've created this page in an attempt to catalog at least some of them.

Hi, I'm Tudor, and this is my slice of the internet :) Projects; About me; Even more about me. If you're in this deep, you're likely either a bot or particularly bored. I'm keeping this page around mostly for personal reference, but maybe you might find something interesting here anyway — it's essentially a timeline of CS-related events in my .Tudor Brindus University of Toronto Hon. Bachelor of Computer Science , 2020 [email protected] Professional Experience Jane Street Capital Software Engineering Intern, FPGA & Network I/O Team New York, NY May 2019 - August 2019 Developed a zero-alloc userspace TCP stack, achieving latencies 4 times lower than Linux’s network stack .

Peeking under the hood of GCC's. __builtin_expect. If you've ever poked at high-performance C code, you've probably seen GCC's __builtin_expect extension being used to manually hint the likelihood of a branch being taken a particular way. Ricing the Windows Subsystem for Linux. One of the more exciting pieces of tech coming out of Microsoft these days is the Windows Subsystem for Linux (also sometimes referred to as "Bash on Ubuntu on Windows"). If you haven't heard . LD_PRELOAD is a very powerful feature supported by the dynamic linker on most Unixes that allows shared libraries to be loaded before others (including libc). This makes it very useful for hooking libc functions to observe or modify the behaviour of 3rd-party applications to which you do not control the source. Here's a short systems debugging story. On dmoj.ca, we run user-submitted solutions to algorithmic programming problems against a set of input files, and judge their output for correctness. One metric by which solutions are ranked on our leaderboards is memory usage. A user recently reported that some code they had submitted was reported as .

tbrindus (Tudor Brindus)

sphere2cube

Xyene (Tudor Brindus)

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tudor brindus|DMOJ: Modern Online Judge Management Team

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