Viewing profile — gosu

How useful is a lock-free (not wait-free) approach in a real-time context? The point is that any thread contending on lock-free data is liable to starve, so the worst-case behavior…

Probably the fact that it eagerly coalesces newly freed blocks where high performance allocators like tcmalloc and jemalloc use slabs of fixed-sized blocks which are never coalesce…

You don't need to have a single frontier, and IIRC no one does these days. A stack of slabs per "arena" suffices, and the extra cost is only a read from a cacheline you'll soon nee…

I'm a very happy user. It's pretty well designed, and extensible in javascript. It's nice having EVERYTHING about the browser at your fingertips in fully customizable way, not just…

I suppose it was bound to happen.

By storing the struct in union with an integral type - or, if you need a value but not an address, casting to such a union. You might also think to just abuse pointer casting, but …

But, like you said, you still need protection of kernel data, which means that you need to execute kernel code on a stack not writeable by the user, at a greater permission level t…

Well, I'd done a small kernel for a class. Later, I wrote a lockfree malloc and realized that large lockfree programs are actually pretty managable, and that was the start. It's ge…

Lockfree OS kernel. Give it a couple weeks.

For that price, I can buy 10 pairs of jeans on ebay, in a style that I like. Or I can go to the thrift store and get 50. I'll have wet ankles when I bike in the rain in a poncho, b…

CMU's got a fairly nice one. It guides students as they build a series of compilers for increasingly large subsets of C, effectively from scratch. Course materials are public, I be…

1) Math is way more than calculus. Writing proofs is the best way to train the general skills that will get you recognized as smart. 2) Stop being a coward. Always push yourself to…

It's true that, if you learn to enjoy CS-related work, it's thrilling and rewarding. You'll find dazzling solutions to interesting problems, and have a blast doing it. But as respe…

That's a really good (and horrific) image. Thanks.

facepalm What was happening is that I was trying to keep the mouse in the control strip, and it would go off the right side of the image. Thanks a lot, Josh. Edit: By the way, the …

This looks fantastic. Watching people's reactions in that example image was really interesting, and it occupied me for a good few minutes. "Why can't you do the same thing with vid…

> Why not? Obvious ethical considerations. I'm sick of living on the death star. It doesn't seem possible to me that any non-transparent organization with such capabilities will ev…

Snowden is a story too. As someone who considers him a hero, and one of the rare few who I can relate to, I'd like to know more about him views so that I can learn from him. That's…

Not if you compile via LLVM/clang.

The same party is already in control of the world's PCs and laptops - things everyone with an XBone will already use for many of their favorite illegal activities. What new danger …

Surely you must mean C**, which is the type of a thing which you can dereference twice to get C. Otherwise, you're dereferencing C twice, which gets you machine instructions, I gue…

What if, like the second best selling book ever, it takes almost a decade for the book to begin selling well? If books can cease to produce money just as their popularity begins to…

It's true that some governments have killed their own citizens unjustly and en masse. I don't think that my own government poses such a threat to me. If you're a US citizen who fee…