Viewing profile — wtarreau

In my opinion it's the opposite. This type of associations is welcome, and they are fine to promote free software and help people, but they are exactly like neighborhood associatio…

No, it needs first to encourage local investment. Companies who seek investors or who get sold do not do it by pleasure, but as a last resort before dying. And in the EU you don't …

Just doesn't work for me, it says "here's the combined image" after ~10s but shows nothing at all. Maybe already victim of its success ?

Blaming the audience makes sense because after all, they're the ones not getting the message right and not asking the presenter to explain it better. But it remains the presenter's…

Thanks for the pointer, it looks particularly interesting. I'm not good with the terminology and it always takes me a while to figure which properties we're talking about starting …

The problem is not the performance of the low-level crypto code IMHO, but how it interfaces with the rest, which is where you're crossing a myriad of locks (and atomic ops for newe…

Just to be clear, we don't care at all about performance of 1.0. The tests resulting in the pretty telling graphs were done in 1.3 only, as that's what users care about.

Absolutely. Sometimes when using OpenSSL in performance tests, you notice that performances vary significantly just by switching to a different memory allocator, which is totally s…

Not to mention the catastrophic security that comes with these systems. On a local ubuntu, I've had exactly 4 different versions of the sudo binary. One in the host OS and 3 in dif…

But it's the same for other long sessions such as slow downloads and git clones. Sites concerned by the number of source ports are not those dealing with just favicon.ico and bulle…

Yep. Actually H1/H2/H3 do have the same problem (remember the good old days when everyone was trying to pipeline over H1?), except that H1 generally comes with multiple connections…

If you transfer large objects, H2 on the backend will increase transfer costs (due to framing). If you deal with many moderate or small objects however, H2 can improve the CPU usag…

It's amazing how people having visibly never dealt with high loads can instantly become vehement against those reporting a real issue. The case where ports are quickly exhausted is…

I suspect it might feel indecent to tell others you suffer when you're both free and rich, and it's difficult for them to figure what's wrong with you. Instead, people in such posi…

What you're describing is for TCP. On TCP you can perform a write(64kB) and see the stack send it into 1460 segments. On UDP if you write(64kB) you'll get a single 64kB packet comp…

> > There's still the problem of sending to multiple destinations: OK sendmmsg() can send multiple datagrams, but for a given socket. > Hmm? sendmsg takes the destination address i…

Nowadays the vast majority of CVEs have nothing to do with security, they're just Curriculum Vitae Enhancers, i.e. a student finding that "with my discovery, if A, B, C and D were …

There's still the problem of sending to multiple destinations: OK sendmmsg() can send multiple datagrams, but for a given socket. When you have small windows (thank you cubic), you…

The default UDP buffers of 212kB are indeed a big problem for every client at the moment. You can optimize your server as you want, all your clients will experience losses if they …

Something that nobody seems to be talking about here is the congestion control algorithm, which is the problem here. Cubic doesn't like losses. At all. In the kernel, pacing is imp…

Not surprised. These animals are fascinating. We're not even sure we have caught everything from their language; maybe it's not just sound-based, and the way they shake their trump…

I ran some tests on phi-3 and mistral-7b and it's not very hard to teach them to use tools, even though they were not designed for this. It turns out these models obey their instru…

There has never been any CONTINUATION frame issues in the first place. Only a bunch of other implementations did it a strange way resulting in abnormal memory usage, but CONTINUATI…

I honestly don't know, all I know is that we've had demands from users at very high loads because the logs are more compact and their parsing is more efficient. And once you have J…

UDP through a proxy is total non-sense. There isn't any single UDP-based service that is cleanly proxyable. Not just one. Most of them rely on the source IP address itself (plus po…