User Profile

[atomsymbol]

My reasoning is the following:

1. The Phoronix article doesn't specify whether the increase is in user-space time or kernel-space time or both
2. However,

...

[atomsymbol]

Seems like a set of random words without meaning.

Please explain:

• Where exactly is the branch misprediction supposed to be happening?
• What

...

[atomsymbol]

Unable to decrypt meaning....

[atomsymbol]

Basically, the results mean that there is a mitigations=off performance bug in the Linux kernel....

[atomsymbol]

The OS isn't "taking user-space code and telling the hardware what to do". An OS kernel has little idea what apps are doing, especially a kernel...

[atomsymbol]

Just some notes:

• It is false that "most PC build instructions say to put the GPU in the PCIe slot closest to the CPU for lower latency and lag

...

[atomsymbol]

They made a video about power consumption of 7950X - but they didn't make an in-depth video. An in-depth analysis of CPU power-efficiency would look somewhat...

[atomsymbol]

It is misleading because if I bought a Ryzen 7000 CPU then I would not be experiencing such power consumption, nor such power-efficiency, numbers when...

[atomsymbol]

Just a note: It isn't true that "no one batted an eye". I clicked the DISLIKE button on two videos published by the same Youtube channel you...

[atomsymbol]

Power-efficiency is a set of data points (which can be visualized in a chart as a curve) - not a single data point. Making judgements about 7950X vs 5950X...

[atomsymbol]

Some notes, opinions and facts:

That is only partially true, because if a compiler writes to a particular CPU register (such as: %rax) twice...

[atomsymbol]

It already happened.



Theoretical (frequency-independent) ILP is constrained by exactly one limit: temporal dependencies among...

[atomsymbol]

There is "1 DPC vs. 2 DPC Performance" section in https://www.techspot.com/review/2534-amd-ryzen-7600x/ which seems to be claiming that DDR5-6000...

[atomsymbol]

Zen 4 can predict 2 taken branches per clock cycle. Whether it can also execute 2 taken branches per cycle is unclear. (Zen 3 has throughput of 1 taken...

[atomsymbol]

Increasing IPC is not so hard if the CPU will run at a lower frequency (such as: 1 GHz). It is hard if the goal is to increase IPC as well as increase...

[atomsymbol]

It highly probable (almost certain) that Ryzen 7000 can be configured in the BIOS to be more power efficient than Ryzen 3000/5000 and (at the same time)...

[atomsymbol]

I can set the temperature limit of the CPU in my AM4 (X470 chipset) motherboard's BIOS to any number between ~60℃ and 95℃. I expect that most AM5...

[atomsymbol]

RTX 4000 has 16-times larger L2/L3 caches than RTX 3000. It is unclear whether RTX 4000 has L3 or just L2 caches. RTX 4000 with a 128-bit memory bus might...

[atomsymbol]

It depends on whether the consumer buying the GPU prefers it to be a black box or a white box. I prefer white boxes (that is: buying the GPU with access...

[atomsymbol]

You were claiming that "The kernel has no idea which apps are important/unimportant, or in foreground/background, etc" which isn't true. In...