5/27/2023 0 Comments System startup timeIn most cases, this section of the boot process will be the largest part of the Boot Time. The User Space is sometimes referred to as the 'userland'. These programs include all of the applications, drivers and other files on the system which can be executed. Many things are controlled in the background by the kernel such as services, system updates, hardware control, etc.Īny other software not included in the firmware, boot loader and kernel is the userspace. So, if you double-click on a web browser icon the program is loaded into memory and started. The program is read into memory and executed. The kernel sends signals to the hard drive to read a program. The information is then sent to the kernel. ![]() When an icon is selected on the desktop a signal is sent to the kernel which interacts with the software to determine what occurs. The hardware sends the information to the kernel which transmits a signal to the software noting a key was pressed. One example is when a key is pressed on the keyboard. It also allows hardware to interact with the software. The kernel will use the commands to communicate with the hardware. ![]() Any applications on a system send commands to the kernel. The Linux Kernel is software that interacts with the hardware through the software. It allows a user to select an option from a menu before a default option is selected when the timeout occurs. There is usually a delay in the bootloader. One popular Boot Loader is the GRand Unified Bootloader (GRUB). The Boot Loader will load the Linux kernel and the Linux RAM Disk (initrd). If you use an external hard drive for the OS to boot from then the firmware on the disk drive will matter.Īfter the firmware is loaded then the Boot Loader takes over the booting process. Only the internal devices or those involved in the system startup should matter. These devices should not have any effect on the boot time. NOTE: Even printers and other external devices can have firmware. For example, if you have an AMD Radeon video card then you can go to the AMD website and possibly find an update for your video card. Most system updates are not automatic and must be downloaded from the system manufacturer. ![]() The firmware can be updated in most cases by system updates. Another example is motherboard firmware which can allow the OS to control the processor fan.Įvery PC, Laptop, Server, etc. In this manner, the OS can control the aspects of the video card. For example, when your video card is powered on it has built-in code which makes it accessible to the Linux Operating System (OS). The firmware is the 'software' which is loaded by the hardware. Let’s look at these first to see what occurs during these stages. There are four basic places where the delay can occur. To help speed up the Linux boot time you will need to determine where the time is being delayed the most. When starting a Linux system you may see there are delays when certain updates are performed or new applications installed.
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