And you'd be correct. As well as not entirely informed. Not that that's wrong. You're getting a 4th core depending on X, Y, and Z conditions. It's one way to Throttle the CPU. Directly used Dynamic Frequency Scaling is one type, ACPI CPU Throttling (Where your CPU's Frequency and Voltage are lowered when you're on Battery Power, or your Battery isn't fully charged yet, or your computer has Power Saving features that activate the feature.) is another. What YOU have is a Triple Core processor with a form of CPU Throttling that emulates a 4th Core in a similar way to Overclocking. To which I say, Either use the 4th Core 100% of the time by activating it and disabling the conditions that shut it off, or if that isn't possible, disable the feature all together.

Conky hates CPU Throttling. Even when there are processors that can just save power by slowing down, Conky reads the lower speed, and doesn't shift to the higher one unless you shut it down and start it back up with full power and no hint of the processor being throttled. By that point, you might as well shut off the feature anyways. CPU Throttling in all of it's forms just don't work right. They really don't serve anyone's best interest.

I'm trying to be as thorough as I can be. I don't mean to sound... well... rude about it... but this is one of those old, annoying issues that are hard to explain without either a lot of words (Which makes the person saying it sound arrogant) or a few, very direct words. (which makes the person sound annoyed and rude.)

Just disable it. Just trust me on this. Conky will never get used to it, and you're just going to get crashes. There are a lot of people here who would probably love to get it working just for the challenge of it, but when push comes to shove it's a useless feature.

And, for example, your LUA script there is taking a roundabout way to check with the OS what processors are currently running, outputting it to a log file, and using the LUA equivalent of GREP/AWK/SED to find one value to compare to. One problem with this. The BIOS and the CPU file don't always agree. The same reason Conky doesn't like CPU Throttling. The Log Files show one value, the BIOS another. The Decision process will always see the same number of CPUs, because there will always be at least one row somewhere in the log file that shows the 4th CPU exists. Then, when the rest of the script goes to run, it will check with the BIOS and the BIOS will say "No. It's not running." and the script will break.

So, the question becomes, are you willing to pull your hair out looking for a way to detect a virtual processor that has been known to disappear on crashing? Or do you just want everything to run properly? In which case you disable the CPU Throttling feature, and chances are the Crashes will start to disappear with it. The Virtual CPU was a giant mistake in computing. That's why it's not really done anymore. They have multiple cores, and sometimes hyperthreading. Beyond that, it's a failed gimmick.

Plus... that's a line you don't need in your Conky setup that you can use for other things, or making everything else fit better.

Yes, Swiss_Knight. I HAVE Heard of it (Phenom II X2/X3 unlocking). And, again, as I said, disable it. Either activate it in the BIOS and remove all conditions where it disables OR disable it permanently. The unlock feature is a form of CPU Throttling. I've been working in the Computer Industry for 15 years. I am very much aware of what I'm saying. YOU may not see it as CPU Throttling, Hell, most anyone else wouldn't either. But CONKY DOES. Even if you get the LUA script to see it properly, Conky will report it differently or have problems with the hardware switch. It's Conky. It's not an incredibly complex program. It is more of a program that reads a script, and as such is very simplistic on some more complex issues such as this.

I've tried the verbose explanation of why I say it, I've tried the short version. If this is a language barrier, please tell me so I can better direct what I'm saying so you don't mistake it again.

Conky permet de surveiller presque tous les paramètres systèmes, de la température du disque dur à la vitesse des ventilateurs en passant par la charge de la batterie. Mais ce n'est pas simplement un logiciel du style "Everest", il est bien plus que ça. Notamment en permettant un intégration sur le bureau, l'affichage de graphiques, la personnalisation du style et de toutes les variables que vous pourriez avoir envie d'afficher.
 
En plus de cela, Conky est personnalisable à souhait !