![]() ![]() ![]() After the image is transferred, the processor is started, and Linux is booted on the card for the first time. The Linux kernel used on the Xeon Phi differs only slightly from an ordinary x86 kernel the necessary adjustments are comparable to those for an ARM image. To activate the card, the host system's system management controller helps load an initrd image with a built-in BusyBox into the Xeon Phi's memory. When the host computer boots, the Xeon Phi first appears as a normal PCI device the processor on the board is inactive. Intel leverages this ability to manage the board's resources and simplify software development. Because the Xeon Phi has full-fledged cores, not just highly optimized special-purpose computing units, it can run its own operating system.
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