From 227b34a3277153ae5c82a652be6d385b7b09de27 Mon Sep 17 00:00:00 2001 From: Ewan Smathers Date: Mon, 8 Sep 2025 02:21:43 +0800 Subject: [PATCH] =?UTF-8?q?Add=20Chapter=C2=A013=C2=A0=C2=A0Out=20Of=20Mem?= =?UTF-8?q?ory=20Administration?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- ...er%C2%A013%C2%A0%C2%A0Out-Of-Memory-Administration.md | 9 +++++++++ 1 file changed, 9 insertions(+) create mode 100644 Chapter%C2%A013%C2%A0%C2%A0Out-Of-Memory-Administration.md diff --git a/Chapter%C2%A013%C2%A0%C2%A0Out-Of-Memory-Administration.md b/Chapter%C2%A013%C2%A0%C2%A0Out-Of-Memory-Administration.md new file mode 100644 index 0000000..a7b0cee --- /dev/null +++ b/Chapter%C2%A013%C2%A0%C2%A0Out-Of-Memory-Administration.md @@ -0,0 +1,9 @@ +
Sadly, it is feasible that the system just isn't out memory and merely must anticipate IO to finish or for pages to be swapped to backing storage. That is unfortunate, not because the system has memory, however as a result of the function is being referred to as unnecessarily opening the probably of processes being unnecessarily killed. Before deciding to kill a course of, it goes by way of the next guidelines. It decides by stepping via each running activity and calculating how suitable it's for killing with the operate badness(). This has been chosen to select a process that's utilizing a large amount of memory however isn't that long lived. Processes which have been working a long time are unlikely to be the cause of memory scarcity so this calculation is likely to pick out a process that uses a number of memory however has not been running long. ADMIN capabilities, the points are divided by 4 as it's assumed that root privilege processes are effectively behaved.
+ +
RAWIO capabilities (entry to raw gadgets) privileges, the points are further divided by four as it's undesirable to kill a course of that has direct access to hardware. RAWIO capabilities, a SIGTERM is shipped to present the method an opportunity of exiting cleanly, [Memory Wave](https://fv-wolkenburg.de/fvwerste-startet-mit-niederlage-in-rueckrunde/) otherwise a SIGKILL is sent. Sure, thats it, out of memory management touches lots of subsystems otherwise, there is not a lot to it. The vast majority of OOM administration stays primarily the same for 2.6 apart from the introduction of VM accounted objects. ACCOUNT flag, first mentioned in Part 4.8. Further checks will likely be made to make sure there's [Memory Wave Audio](https://pipewiki.org/wiki/index.php/Although_They_Could_Spend_It_Freely) out there when performing operations on VMAs with this flag set. The principal incentive for this complexity is to avoid the need of an OOM killer. SHARED, non-public areas which are writable and areas arrange shmget(). That is a reasonably simple mechanism, but it allows Linux to recollect how much memory it has already committed to userspace when deciding if it should commit more. 2.6 has a characteristic available which permits safety associated kernel modules to override certain kernel features. There are quite a lot of dummy, or default, [Memory Wave](https://thewebdevs.net/choosing-the-right-home-renovation-company/) features that could be used which are all listed in safety/dummy.c but the majority do nothing besides return. These pages, minus a 3% reserve for root processes, is the whole amount of memory that is on the market for the request. If the memory is out there, it makes a check to make sure the whole quantity of dedicated memory doesn't exceed the allowed threshold. TotalSwapPage, where OverCommitRatio is ready by the system administrator. If the total quantity of dedicated area is not too high, 1 will probably be returned so that the allocation can proceed.
+ +
Microcontrollers are hidden inside a stunning variety of products lately. If your microwave oven has an LED or LCD screen and a keypad, it comprises a microcontroller. All fashionable automobiles contain at least one microcontroller, and may have as many as six or seven: The engine is managed by a microcontroller, as are the anti-lock brakes, the cruise management and so forth. Any system that has a distant control almost actually accommodates a microcontroller: TVs, VCRs and high-end stereo techniques all fall into this class. You get the concept. Mainly, any product or device that interacts with its user has a microcontroller buried inside. In this article, we'll take a look at microcontrollers as a way to perceive what they are and the way they work. Then we will go one step additional and focus on how you can begin working with microcontrollers yourself -- we will create a digital clock with a microcontroller! We can even construct a digital thermometer.
+ +
In the process, you'll learn an terrible lot about how microcontrollers are used in commercial merchandise. What's a Microcontroller? A microcontroller is a pc. All computer systems have a CPU (central processing unit) that executes applications. If you're sitting at a desktop pc right now reading this text, [Memory Wave Audio](http://www.seong-ok.kr/bbs/board.php?bo_table=free&wr_id=5535996) the CPU in that machine is executing a program that implements the online browser that is displaying this page. The CPU loads the program from someplace. In your desktop machine, the browser program is loaded from the onerous disk. And the pc has some input and output devices so it will probably speak to folks. On your desktop machine, the keyboard and mouse are input gadgets and the monitor and printer are output gadgets. A hard disk is an I/O device -- it handles both input and output. The desktop laptop you are utilizing is a "common goal laptop" that may run any of thousands of applications.
+ +
Microcontrollers are "special goal computer systems." Microcontrollers do one thing nicely. There are plenty of different widespread traits that outline microcontrollers. Microcontrollers are dedicated to one process and run one particular program. The program is saved in ROM (learn-only memory) and usually does not change. Microcontrollers are sometimes low-power units. A desktop computer is almost all the time plugged right into a wall socket and might devour 50 watts of electricity. A battery-operated microcontroller may eat 50 milliwatts. A microcontroller has a dedicated input system and often (however not all the time) has a small LED or LCD show for output. A microcontroller additionally takes enter from the machine it's controlling and controls the machine by sending alerts to totally different elements within the device. For instance, the microcontroller inside a Television takes input from the distant management and shows output on the Tv screen. The controller controls the channel selector, the speaker system and certain adjustments on the picture tube electronics corresponding to tint and brightness.
[funneloftheweek.com](https://blog.funneloftheweek.com/p/info-product-vsl-smackdown-mindvalley-vs-memory-wave) \ No newline at end of file