2012-06-12
MIT OSE 讀書會 6/12 Lab4
報名網址：http://registrano.com/events/8aaa5d
Lab4
time quantum -->
--> CURT v1
* Scheduling policy
The scheduler is called in the following two cases:
- SCHED_TIME_EXPIRE : when thread's time_quantum value is 0.
- SCHED_THREAD_REQUEST : Request the execution for higher priority thread. defined in prio_exist_flag
- The rate monotonic (RM) real-time scheduling algorithm does not support such dynamic systems very well.
- book for Realtime system
realtime scheduling RM
realtime scheduling RMA
realtime scheduling EDF (Earliest deadline first scheduling)
Speaker at FreedomHEC 2012
Insop Song:Insop Song是Ericsson的資深軟體工程師. 主要負責開發先進的網路設備.之前他曾開發過多種即時系統包括工業級機器人系統,自動化系統以及高解析度數位相機系統.也曾經撰寫與研究即時系統與Linux,同時曾在Ericsson領導一個大型網路設備的Linux移植計畫.目前他正進行的一個計畫是將reservation-based scheduler應用在電信設備.
ARM Big Little
http://www.arm.com/zh/products/processors/technologies/bigLITTLEprocessing.php
big.LITTLE Processing
big.LITTLE processing addresses one of today’s industry challenges: how to create a System on Chip (SoC) that provides both high performance as well as extreme power efficiency to extend battery life. big.LITTLE connects the performance of the ARM Cortex-A15 MPCore™ processor with the energy efficiency of the Cortex-A7 processor, and enables the same application software to be seamlessly switched between them. By selecting the optimum processor for each task big.LITTLE can extend battery life by up to 70%
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ARM semihosting
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0205f/Bgbjjgij.html
Jserv
STM32-4
-- F4OS -- re-implement from xv6
ST-Link +-- v1
|
+- v2
STLINK --> Firmware
USB->JTAG ---> ST-LINK
Hardware
http://www.mcuapps.com/catalogs/stm32/