Viewing profile — drv

I/O scheduler was probably a bad example, since you might not need/want one for fast NVMe devices anyway, but yes, they help ensure limited resources (storage device bandwidth or I…

It's cool to see more systems code written in Rust! I also previously worked on SPDK, so it was neat to see it being chosen as a point of comparison. However, I was waiting for the…

The assembly version is using the packed version of the FMA instruction (that's what the "P" in the mnemonic stands for), but as far as I can tell, it's only using one of the packe…

nextAfter is probably also including the denormals (an additional 2^23 values near 0).

One possible reason is that storing a bool separately from the index makes it difficult to update the producer or consumer index atomically. With the implementations that store the…

It's presumably not standard Host Memory Buffer, since the spec says "The controller shall function properly without host memory resources."

2001, not 2011. Time flies. :)

(Assuming you mean MailChimp) I don't know anything about how MailChimp operates, but a quick search turns up this blog post about how to set up SPF records [1]. From there, you ca…

It has a C API, but everything under the hood is C++. The source is actually public now: https://github.com/Microsoft/Windows-Driver-Frameworks

Microsoft has been shipping static analysis tools with the Windows DDK for a long time (originally PREfast[1], now Static Driver Verifier[2]). I believe the static analysis is even…

In practice, this is probably correct (Microsoft cares a lot about backward compatibility, and many programs depend on MSVCRT.DLL). However, the official word from Microsoft is tha…

Anyone running FFmpeg[1] on untrusted input without sandboxing of some kind is being extremely negligent. It's around a million lines of C that does tricky file format parsing and …

Ah, I see. The I/OAT DMA copy offload is essentially equivalent to an asynchronous memcpy(), so anything addressable on the memory bus could be a source or destination (with some c…

The SPDK libraries are mostly storage-specific components (the I/OAT DMA engine can be used for generic copy offload, but it is particularly useful for copying between network and …

The NVMe driver will only work for a fairly narrow set of uses in which the whole NVMe device(s) can be dedicated to a single application (this is because the user-space applicatio…

I don't know anything about Omni-Path, sorry. However, based on the publicly available information, it does look like a very interesting combination. One major advantage of SPDK ov…

I am an engineer working at Intel on SPDK, and I can answer any technical questions you might have. Currently SPDK consists of a usermode NVMe (PCIe-attached SSD) driver. We will s…

It's certainly true that the polled-mode driver model doesn't interact well when the application needs to use other APIs that don't provide a polled mode. However, SPDK can be used…

This looks like an ideal case for something like ldexp(), but I couldn't find an equivalent function in Java at first glance. A lookup table seems like a bit of a shame for somethi…

The bufferbloat-related changes made in CeroWRT ( http://www.bufferbloat.net/projects/cerowrt ) have been merged into the Linux kernel and the OpenWrt project.

That's odd; the certificate I'm seeing for news.ycombinator.com has a SHA-256 signature, and the Qualsys test agrees.

The 55 MPH limit in the US wasn't even instituted for safety reasons; it was a reaction to the oil crisis. Any safety impact was probably due more to the improvements in car safety…