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The general definition of OS noise is the disturbance caused by the operating system when an application is running on a processor. The CPU is wasting its computational power due to such interference, and this noise can degrade the performance of parallel applications. As the number of cores increases, it affects the performance more, resulting in scalability problems.
OS noise can occur due to different kernel activities. In the previous research, kernel activities that cause OS noise are classified into 5 categories: periodic, page fault, scheduling, pre-emption, and I/O.
OS noise includes not only the interruption of code execution caused by timer/device/software interrupts, faults, etc. but also disturbances of the memory subsystem that occur when the operating system makes requests to the processor¡¯s cache subsystem. |
IEEE/ICACT20210165 Slide.08
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