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Comment Re:Do you actually use them day today though? (Score 1) 105

by ls671 (#66359996) Attached to: HP's Answer to the MacBook Neo Is Thinner, Lighter, and Comes With OLED

Here:

Those dudes probably don't know how to make the difference between file cache and memory usage. All computers including those using Linux will use ALL their memory for file caching e.g. caching the content of files into memory.

Here is an example:
free -h
                                                        total used free shared buff/cache available
Mem: 7.8Gi 617Mi 586Mi 53Mi 6.6Gi 6.8Gi
Swap: 15Gi 66Mi 15Gi

This computer has 8GB of memory, ~586MB of free memory, and ~6.8GB of available memory because it uses the spare ~6.6 GB for file caching, all OSes do that. That memory used for file caching is available instantly for the OS at anytime and must be excluded from the memory the OS uses. All spare memory will eventually go to file caching. Again all OSes work like that.

So 8GB ram 586MB free and 617MB used by the OS and running programs so 6.8GB available

So you need to be able to tell the difference between free memory (you shouldn't have any or very little if your OS works correctly) and *available* memory. That memory used for file caching is avaiable on demand at any time for the OS and running programs

Also don't look at "virtual memory" used you need to look at "resident memory"

Example:
On the same host as above:
1004 mysql 20 0 1759176 355056 7560 S 0.0 4.4 61:13.76 mysqld

mysqld uses 1.7 GB of virtual memory but only 355MB of resident memory. That 1.7GB of virtual memory doesn't really matter. All OSes including Windows work the same way although they often name thing differently. You need to know how to interpret what you see...

Submission + - Used processor leads to game ban (heise.de) 2

Submitted by AmiMoJo
AmiMoJo writes: Anyone buying used hardware for a gaming PC needs to be careful: not just whether the components are still in order but also what the previous owner did with them. A case on Reddit shows this. Someone installed a used AMD processor, a Ryzen 7 5800X3D, in their PC. Because the previous owner was caught cheating, the new owner cannot start several online games.

The problem was noticed in the first-person shooter “Valorant” from the development studio Riot. Right from the first start, the new owner was kicked out directly, according to their statement. Riot support confirmed that the previous owner had cheated. The processor is therefore on an internal blacklist – and, with its installation in the PC, now apparently also some other components like the mainboard. Riot support does not remove such entries manually.

In addition to “Valorant,” all other PC games from Riot are affected: the strategy game “League of Legends,” the auto-battler “Teamfight Tactics,” the card game “Legends of Runeterra,” the fighting game “2XKO,” and likely future titles as well.

Comment Re:Do you actually use them day today though? (Score 1) 105

by ls671 (#66359620) Attached to: HP's Answer to the MacBook Neo Is Thinner, Lighter, and Comes With OLED

Those dudes probably don't know how to make the difference between file cache and memory usage. All computers including those using Linux will use ALL their memory for file caching e.g. caching the content of files into memory.

Here is an example:
free -h
                            total used free shared buff/cache available
Mem: 7.8Gi 617Mi 586Mi 53Mi 6.6Gi 6.8Gi
Swap: 15Gi 66Mi 15Gi

This computer has 8GB of memory, ~586MB of free memory, and ~6.8GB of available memory because it uses the spare ~6.6 GB for file caching, all OSes do that. That memory used for file caching is available instantly for the OS at anytime and must be excluded from the memory the OS uses. All spare memory will eventually go to file caching. Again all OSes work like that.

So 8GB ram 586MB free and 617MB used by the OS and running programs so 6.8GB available

So you need to be able to tell the difference between free memory (you shouldn't have any or very little if your OS works correctly) and *available* memory. That memory used for file caching is avaiable on demand at any time for the OS and running programs

Submission + - Cops Can Bypass iPhoneâ(TM)s Automatic Reboot to Get Into Locked Phones (404media.co)

Submitted by alternative_right
alternative_right writes: Apple quietly introduced a new feature in iOS that automatically reboots an iPhone that has not been unlocked for 72 hours. The idea behind this so-called âoeinactivity rebootâ is to revert the phone to a state that makes it harder for police to break into the device, and thus extract sensitive data from it with forensics technology.

The new technology to get around inactivity reboot was developed by Magnet Forensics, the company behind GrayKey, a popular tool sold to law enforcement agencies that allows them to unlock and access data stored in iPhones and Android smartphones. Magnet has developed a new device called GrayKey Preserve and a feature for its regular GrayKey devices called Evidence Preservation Mode, according to the video.

Submission + - California scientist emerges as possible Tylenol murders suspect (sfgate.com)

Submitted by schwit1
schwit1 writes: A man found dead in a church halfway across the country may have suddenly unlocked the key — quite literally — to one of America’s most famous unsolved crimes.

But although he had a successful career, working at one point for Lockheed Martin on a NASA-related project in New Mexico, Betkouski had a reputation for making unsettling comments. Former coworkers told Cooper that Betkouski spoke of how to commit a “perfect crime,” had a “history of volatility" and referenced cyanide as an ideal way to kill without detection. He also mentioned putting poison in over-the-counter medication, an especially worrisome comment coming from someone who had worked in multiple drugstores.

“It was said that Dr. Betkouski attempted to obtain some type of pills or capsules from a pharmacy in the Las Cruces area,” Cooper said at a press conference last week. “He said this would be for an experiment. For reasons not fully understood, Dr. Betkouski created a disturbance at the location and the police were summoned.”

Less than three months before Betkouski killed himself, a national terror was unfolding in Chicago. In late September 1982, seven people took over-the-counter Tylenol for their usual aches and pains. The capsules had been opened and filled with potassium cyanide, killing the people who took them.

Submission + - California rushes to prepare for massive 'Kelvin' wave (theguardian.com)

Submitted by fjo3
fjo3 writes: Communities across California are rushing to prepare for the imminent arrival of the so-called “Kelvin wave”, a massive underwater band of warm water threatening to inundate swaths of the vast North American shoreline.

The wave is nearing southern California and expected to reach the San Francisco Bay Area by early October, as it crawls toward Alaska. Waters could rise by a foot along the California coast, according to scientists, who have warned that this could dramatically double the 8-12in rise in sea levels already caused by climate change over the last century.

Submission + - The night sky is getting 10% brighter every year (theguardian.com)

Submitted by fjo3
fjo3 writes: Every year, the night sky is becoming 10% brighter. Eighty per cent of people live under light-polluted skies. And while the UN declared a healthy environment – clean air, clean water – to be a human right, I believe we also all have a right to darkness as well.

Submission + - Virus Stole a Human Gene and Won't Let Go of It (nytimes.com)

Submitted by joshuark
joshuark writes: In a new twist on the phrase "going viral" or stealing code, the NYT reports a virus has "stolen" a human gene, and will not let it go. In the article "This Virus Stole a Human Gene and Won’t Let Go of It" reports that scientists have found a human gene lurking in a virus that causes skin infections. Thus using our own DNA to infect us.

The molluscum contagiosum virus, which causes sores on skin, swiped a gene from humans about 100,000 years ago according to a new study.

The way that viruses replicate makes them particularly good at thieving DNA. The viruses infect a cell, then co-opt its machinery by injecting their own genes. Sometimes this process goes awry, and a stretch of the host’s DNA gets bundled into the new viral genes. This molecular error can pose a threat to human health.

Comment Personalized Price Changes Are Impractical (Score 5, Informative) 80

The Walmart where I regularly shop switched to digital shelf tags a while ago.

There really is no practical opportunity to personalize pricing using these. Suppose Walmart were tracking a customer through the store and figured out that the customer met some demographic that would pay more. If it updated the shelf tag as that customer walked by, no other customer would see that price (as it would revert immediately after the targeted customer left the area). Furthermore, the record of that higher price would have to persist all the way through staffed registers and self-checkouts. If the customer returned to pick up a second jar of the item, and this time there was another cheap customer also in the area, would the system raise the price on the shelf tag again? If not, would it figure out that the first jar was $10 and the second jar was $8? What if the customer put the first jar back on the shelf and then picked it up again immediately -- would they then pay $8 or $10 at checkout?

Frequent price changes are simply not practical in general during operating hours. At least in my state, the rule is that the price you pay must be the price on the shelf (although I think the retailer is free to charge a lower price at the register), so changes would have to take into account the lag between a customer picking up the item and going through checkout. They could probably post a prominent sign saying, "Shelf tag prices are good for a maximum of two hours." Then, for price increases, they could update the tags and wait two hours before updating the POS system. For price decreases, they could lower the price in the POS system and update the shelf tags two hours later.

Since the digital shelf tags were rolled out at my Walmart, I have a subjective feeling that the prices do change more frequently, but I lack objective data on this. I have no problem with this.

One cool feature of the shelf tags at my Walmart is that, with the app, you can look up a product and the tag will, on request, flash a blue LED so you can find its shelf location quickly. Of course, this being Walmart, there's a pretty good chance that the item is out of stock or that the item in that location isn't the item that's supposed to be there!

Submission + - The Nature of War has just changed forever (telegraph.co.uk)

Submitted by MrBrklyn
MrBrklyn writes: Ukrainiaan land robots have been deployed in combat, killing thousands of Russian troops and changing the face of warfare forever. Leaders accross the globe are sitting up in the seats and paying attention as what started as a localized Russian agression has now turned into a world altering and historic war which the Russians seemingly have no means to win.

https://ancillary-proxy.atarimworker.io?url=https%3A%2F%2Fwww.telegraph.co.uk%2Fwo...

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