Svobodný software

[9 minut čtení] Online konference s názvem Den ze života aplikace se zabýval především softwarovou stránkou dnešních datacenter. Ta byla dříve zaměřena na hardwarové prvky, čím dál více tu ale podstatnou roli hraje software. Ve středu 16. září proběhla online akce Den ze života aplikace. Hlavním tématem byla moderní datacentra a cloudové služby zaměřené na běh rozsáhlých aplikací. Na webu akce naleznete také záznamy z prezentací. Root.cz je partnerem akce.

Most information presented during the annual X.Org Developers' Conference doesn't tend to be very surprising or ushering in breaking news, but during today's XDC2020 it was subtly dropped that Arm Holdings appears to now be backing the open-source Panfrost Gallium3D driver...

Valve developer Pierre-Loup Griffais just provided an update during XDC2020 on the Gamescope compositor work as an evolution of Valve's prior "steamcompmgr" X11 window manager used by SteamOS...

The feature to provide opt-in flushing of the L1 data cache on each context switch looks like it will be coming with the Linux 5.10 cycle for this functionality providing security benefits but at the cost of further performance degradation...

Following today's GNOME 3.38 release a new versioning scheme was announced whereby the next release in six months time will be GNOME 40.0...

GNOME 3.38 has shipped as the newest half-year update to this desktop environment and will be featured in the upcoming Ubuntu 20.10, Fedora 33, and other autumn Linux distribution updates...

The V3DV driver for providing Vulkan support on the Raspberry Pi 4 is very close to Vulkan 1.0 conformance and once squaring that away along with other lingering bits they will be pursuing the upstreaming of this driver within Mesa...

XDC2020 as the annual gathering of X.Org developers was due to take place in Poland this year but the COVID-19 pandemic has caused it to be yet another conference happening exclusively online. Day 1 of XDC2020 has just begun...

Compression expert Rich Geldreich who previously worked for the likes of Valve and Unity prior to co-founding his own consulting firm has now made the Crunch and LZHAM technologies available under the public domain...

After over a half year working on this new version, Rav1e 0.4 is on the way but first is the alpha milestone out today...

Gentoo Linux is looking to improve the kernel maintenance experience by offering up Ebuilds that make it easier to maintain the kernel through the package manager -- including prebuilt binary kernels...

We still don't have our hands on the GeForce RTX 3080 yet and remains to be seen when we will get our hands on RTX 30 series hardware for Linux testing, but at least there's a pretty good rhythm for how the NVIDIA Linux support will play out...

[6 minut čtení] Před týdnem vyšla nová verze autoritativního DNS serveru Knot DNS 3.0, která přináší mimo jiné i podporu XDP. Ukážeme si, jak jsme připravili trochu specifické prostředí, v létě testovali a následně spustili do ostrého provozu. Režim XDP, zjednoduše řečeno, umožňuje výrazně zrychlit zpracování DNS dotazů, které přichází standardním kanálem na port UDP/53. A to tak, že tyto dotazy a příslušné odpovědi jsou přímo předávány mezi síťovou kartou a DNS démonem. To je sice výhodné, protože odpadne režie jádra, průchod packetů síťovým stackem a podobně. Na druhou stranu je to ale komplikace pro administrátory, protože se k takovému serveru musí chovat zcela jinak než v rámci konvenčního provozu autoritativního DNS serveru.

[1 minuta čtení] Sonda do světa otevřeného softwaru. Dnes se podíváme na softwarově definované rádio, vyzkoušíme nástroj pro sledování přidělení paměti, představíme si MPD klienta a podíváme se na jednu komunikační aplikaci. Softwarově definované rádio postavené na GNU Radio. Pro interní komunikaci používá VoIP. Jeho primární účel je experimentální a vzdělávací, lze jej ale použít i pro datovou komunikaci. Jeho další využití je samozřejmě také jako amatérský radiopřijímač.

It turns out the Radeon RX 6000 series will have AV1 hardware video decode capabilities...

Yet another new file-system being worked on for the Linux/open-source world is NVFS and has been spearheaded by a Red Hat engineer...

Unvanquished was one of the most promising open-source game projects nearly a decade ago with its "Daemon" engine but since abandoning their monthly alpha release regiment and their beta/stable releases never materializing either, it's been relatively quiet the past few years. But their developers have been persisting and today they are announcing that following a three-year cleanup the game is fully free/open-source including all assets under applicable licenses...

OpenJDK 15 is out today as the latest general availability release for this open-source Java implementation...

IBM announced today at the OpenPOWER Summit 2020 that they are contributing the A2O POWER processor core and Open Cognitive Environment to the OpenPOWER community...

The Vulkan System Integration working group has decided to publish their work-in-progress extension on VK_EXT_present_timing as their effort to expose the presentation engine's display details and better allow scheduling a present to happen at a specific time...