Linux 6.12 Released With Real-Time Capabilities, Sched_Ext, More AMD RDNA4 & More

[mobadboy]

Birdies latest troll account?

You can accuse me of a lot of things, but don't accuse me of being birdie. That's going too far.

About 30% of my posts are going to be braindead. It is what it is. Take it for what it is: making fun of the people who actually believe that. I chuckle whenever any of my posts like this get a like. If they don't get a like then I am relieved and believe slightly more in humanity.

Let me break it apart for you.

bloat

bloat

BLOAT

nonsense to distract the reader and add a feeling of frustration

LoC only goes up, never goes down

obviously. This is true for almost any project.

unless planned obsolescence strikes and they remove yet another critical driver

Equating planned obsolescence and Linux removing random drivers while saying that they are critical. Basically every word was untrue. If I said this in isolation though it would not be as believable.

[F.Ultra]

Also I realized something.
I suspect that CPU cache is being polluted by compilation. Basically i run FO4 while compiling firefox. Frame dropped bad. I CTRL Z it. FPS was still bad. I foregrounded process and killed it - frames immediately risen. Now if only there was a CPU cache control for Linux.

while the task is paused it cannot cause any cache issues so I wonder if this could simply be down to low mem situation

[guglovich]

It's bloated so they develop a dangerous BPF. We have to wait for Redox and pray for a sequel to Hurd, where features will be enabled as the user needs them.

[eggy]

With this release there was supposed to be support for hardware in ThinkPad T14s with Qualcomm Snapdragon X Elite SoC, is it there? I can't find it
Some drivers were still missing like USB-C driver.

[TNZfr]

I don't know, but your Thinkpad is not the century choice.

In fact I red that they didn't sell a lot of unit. MS should run after 1 target at a time : today they try to put everyone in their sauron's ring (ie Azure AD), to be the 1st in AI (before rules being set), to migrate everyone on Win11 (with TPM, UEFI Secure Boot even if hardware is not compatible) ...

Since AI is not deterministic, how can we maintain a semblance of control over IT? The question of functional developments arises: how can we develop an AI and its objectives more or less well aligned when we have no control over anything?

[dimko]

while the task is paused it cannot cause any cache issues so I wonder if this could simply be down to low mem situation

Can't be the case, 64 Gig of ram, and ram usage is low.

[F.Ultra]

Can't be the case, 64 Gig of ram, and ram usage is low.

well then it is indeed extremely strange since if the task is really paused it is paused and thus it is not running on the cpu and therefore it cannot pollute the cache at all. Who ever said that computers was easy :-)

[dimko]

well then it is indeed extremely strange since if the task is really paused it is paused and thus it is not running on the cpu and therefore it cannot pollute the cache at all. Who ever said that computers was easy :-)

The question becomes, where does existing compilation cache go? RAM? Something tell me - its not the case. Hence the problem.

[F.Ultra]

The question becomes, where does existing compilation cache go? RAM? Something tell me - its not the case. Hence the problem.

If you pause the execution of the compile with ctrl+z (assuming that the whole compilation was actually paused here and not just some parts of it) then there is no compilation cache, every cache line it occupied would be overwritten by the running application (aka the game). It was already in RAM so what happens is that the copy in cache is replaced.

You cannot cache data that doesn't already exist in RAM, when the CPU wants to read a peace of memory it first have to load a full cache line (64 bytes) from that position of RAM into the cache and only then can the CPU perform calculations on the data. Then when it does writes it overwrites the old position in the cache (if it updated the same data it once loaded) and then later the MMU flushes it from cache to actual RAM.

[dimko]

If you pause the execution of the compile with ctrl+z (assuming that the whole compilation was actually paused here and not just some parts of it) then there is no compilation cache, every cache line it occupied would be overwritten by the running application (aka the game). It was already in RAM so what happens is that the copy in cache is replaced.

You cannot cache data that doesn't already exist in RAM, when the CPU wants to read a peace of memory it first have to load a full cache line (64 bytes) from that position of RAM into the cache and only then can the CPU perform calculations on the data. Then when it does writes it overwrites the old position in the cache (if it updated the same data it once loaded) and then later the MMU flushes it from cache to actual RAM.

Thanks for interesting perspective.
Can't help but wonder why do I have a performance drop by using ctrl-z. Even though CPU and RAM usage did not change and CPU usage was significantly lower?