[논문]MSR_FSB_FREQ 제어를 이용한 윈도우 운영체제에 실시간 처리 방법

김종진; 이상길; 이철훈

doi:10.9717/kmms.2020.24.1.095

MSR_FSB_FREQ 제어를 이용한 윈도우 운영체제에 실시간 처리 방법
Real-time Processing Method for Windows OS Using MSR_FSB_FREQ Control 원문보기

멀티미디어학회논문지 = Journal of Korea Multimedia Society, v.24 no.1, 2021년, pp.95 - 105

김종진 (Dept. of Research and Development Tawazun Technology and Innovation) , 이상길 (Dept. of Computer Science Engineering Chungnam National University) , 이철훈 (Dept. of Computer Science Engineering Chungnam National University)

Abstract ▼ AI-Helper

In the case of laptops and tablet PC's that replace desktop, it uses the Windows operating system to provide various functions depending on operating system dependency, the Windows operating system does not support real-time processing because it uses multi-level feedback queue scheduling that extends round-robin scheduling. Also, since the initial value of Local APIC Counter can not be obtained from the Windows 8, the real-time processing function provided through the existing RTiK does not work. In this paper, we calculate Local APIC Counter value by using MSR_FSB_FREQ register to support real-time processing function on tablet PC's. We designed and implemented RTiK+, which provides real-time processing function to guarantee the periodicity by calculating the operation time of accurate timer. In order to verify and evaluate the performance of the implemented the RTiK+, the period was measured by using the Read Time-Stamp Counter(RDTSC) instruction and it was confirmed that it operates normally at 1ms and 0.1ms period.

주제어

표/그림 (22)

그림 Fig. 1. Configuration of Multi-core based on real-time Windows operating system.
그림 Fig. 2. Diagram for method to provide a real-time by RTiK+.
표 Table 1. Third Party Operation Systems of Windows.
그림 Fig. 3. Block diagram of x86 chipset interface.
그림 Fig. 4. Frequency state of CPU clock depending on the setting of the C-State.
그림 Fig. 5. Operation Process in the User area (Ring 3) of the RTiK+.
그림 Fig. 6. Function for setting the Core to run real-time thread.
그림 Fig. 7. Function for setting the Priority of real-time thread.
그림 Fig. 8. Environment of experimentation for proving the RTiK+ operation.
그림 Fig. 9. Test code for measuring the period of the RTiK+.
표 Table 2. Configuration between the Host and the Target Computer.
그림 Fig. 10. The result for period of 1ms using the RTiK+ without workloads.
그림 Fig. 11. The result for period of 1ms using the RTiK+ with 10 workloads.
그림 Fig. 12. The result for period of 0.1ms using the RTiK+ without workloads.
그림 Fig. 13. The result for period of 0.1ms using the RTiK+ with 10 workloads.
표 Table 3. The result for 1ms of the RTiK+ with/without workloads.
표 Table 4. The result for 0.1ms of the RTiK+ with/without workloads.
그림 Fig. 14. The result for period of 3ms, 5ms, 10ms and 25ms using the RTiK+.
그림 Fig. 15. The result of period after C-State's enable.
표 Table 5. The results for period of 3ms, 5ms, 10ms and 25ms using the RTiK+.
표 Table 6. The result of period after C-State enables.
표 Table 7. Comparison between RTiK+ and RTX.

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