is with Mobile operating systems lab, Dankook university. [CV]
I am at the beginning stage; I joined Dankook University in 2014, as an assistant professor.
I currently work for single-ISA heterogeneous multi-core processor (SI-HMP) computing platforms.
SI-HMP has unique characteristics in power-performance scaling of computing.
It is somewhat a mixture of homogeneous and heterogenous multi-cores.
SI-HMP uses cores that share the same instruction set; however, it consists of several cores that bear different micro-architectures,
which present differently optimized power and performance cores.
The result is that we can choose different cores, optimizing power and performance, on demand.
Furthermore, we do not need to modify existing software because all cores run with the same instruction set.
We can dynamically optimize power and performance level according to the CPU demands, or power-budget,
by selecting different cores combination.
There should be many interesting applications area that can get benefit from these cores combination.
I am doing systems research work around all the issues on the hardware/software platform.
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To my Ph.D, I did some research work on real-time scheduling in a virtual machine system.
The major obstacle in real-time support in virtual machine system is that VM does not run on physical time, but virtual time.
Therefore, we need to carefully schedule VM at hypervisor level, and guest OS in a virtual machine should have a proper consideration.
Abstraction helps to build a complex system in hierarchical manner.
In real-time scheduling world, existing compositional scheduling theories help to deal with problems in hierarchical scheduling system.
Some of my paper tries to incorporate the theory into a real system ( i.e. a virtual machine system ).
http://sites.google.com/site/kuoslabosvirtual/home
Activities
Xen summit Asia 2011 at Santa Clara, CA [Slides]
Xen summit Asia 2009 at Shanghai [Slides] [Video] (N.B. video file is large, so be careful if you are in slow internet env.)
Microsoft Research Asia Internship at WN group (2006)
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Publications
Intl' Journal
-. Hyunchan Park, Hanchan Jo, Cheol-Ho Hong, Young-Pil Kim, Seehwan Yoo; Yoo, C., "SSD-Tailor: Automated Customization System for Solid-State Drives," IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems , vol.34, no.5, pp.862-866, May 2015
-. Seehwan Yoo, "An empirical validation of power-performance scaling: DVFS vs. multi-core scaling in big.LITTLE processor," IEICE Electronics Express, vol. 12, no. 8, pp. 20150236, doi:10.1587/elex.12.20150236
-. Chiyoung Lee, Cheol-Ho Hong, Seehwan Yoo, Yoo, C., "Compressed and shared swap to extend available memory in virtualized consumer electronics," IEEE Transactions on Consumer Electronics, vol.60, no.4, pp.628-635, Nov. 2014 doi: 10.1109/TCE.2014.7027336
-. Seehwan Yoo, Chuck Yoo, "Real-Time Scheduling for Xen-ARM Virtual Machines", IEEE Transactions on Mobile Computing, vol.13, no. 8, pp. 1857-1867, Aug. 2014, doi:10.1109/TMC.2013.109.
-. Seehwan Yoo, Sung-bae Yoo, Chuck Yoo, "Virtualizing ARM VFP (Vector Floating-Point) with Xen-ARM," Journal of Systems Architecture, Volume 59, Issue 10, Part D, November 2013, Pages 1266-1276, ISSN 1383-7621, http://dx.doi.org/10.1016/j.sysarc.2013.09.010.
-. Cheol-Ho Hong, Young-Pil Kim, Seehwan Yoo, Chi-Young Lee, and Chuck Yoo, "Cache-aware Virtual Machine Scheduling on Multi-core Architecture," IEICE Transactions on Information and Systems, Vol. E95-D, No. 10, Oct. 2012.
-. Seehwan Yoo, Kuen-hwan Kwak, JaeHyun Jo, and Chuck Yoo, "Predictable Packet Latency in Xen-ARM," IEICE Transactions on Information and Systems, Vol. E95-D, No. 11, p. 2613-2623, Nov. 2012.
-. Seehwan Yoo, Chuck Yoo, and Hyunchan Park "On fairness of Proportional Work-conserving I/O scheduling," IET Electronics Letters, Vol. 48, No. 12, p. 682-684, Jun. 2012.
-. SungWon Ahn, ShinHyoung Lee, SeeHwan Yoo, DaeYoung Park, Dojung Kim and Chuck Yoo, "Isolation Schemes of Virtual Network Platform for Cloud Computing," KSII Transactions on Internet and Information Systems, Vol.6, No.11, pp.2764-2783 , Nov 2012.
-. Jae-Hyun Hwang, See-Hwan Yoo, and Chuck Yoo, "Momentary Recovery Algorithm: A New Look at the Traditional Problem of TCP", IEICE Transactions on Communications, Vol. E92-B, No.12, Dec. 2009.
-. Seehwan Yoo, Tae-Kyung Kim, Chuck Yoo, "Resolving Performance Anomaly using ARF-aware TCP," The 6th IFIP Workshop on Software Technologies for Future Embedded and Ubiquitous Systems (SEUS 2008), LNCS vol. 5287 pp. 209-220, Oct. 2008.
-. Seehwan Yoo, Chuck Yoo, "Service Oriented Networks – Dynamic Distributed QoS Routing Framework," Information Networking. Advances in Data Communications and Wireless Networks (ICOIN 2006), LNCS vol. 3961 pp. 196-206, Nov. 2006.
Intl' Conference
-. Seehwan Yoo, YoonSeok Shim, Seunghac Lee, Sang-Ah Lee, and Joongheon Kim, "A case for bad big.LITTLE switching: how to scale power-performance in SI-HMP," In Proceedings of the Workshop on Power-Aware Computing and Systems (HotPower '15). ACM, New York, NY, USA, 1-5. DOI=http://dx.doi.org/10.1145/2818613.2818745
-. Seehwan Yoo, Young-Pil Kim, "Test-driven development of consumer electronics device drivers: A user-level device driver approach," in Proceedings of the IEEE International Conference on Consumer Electronics (ICCE), 2015, pp.392-394, 9-12 Jan. 2015
-. Young-Pil Kim, Seehwan Yoo, Chuck Yoo, "DAoT: Dynamic and Energy-aware Authentication for Smart Home Appliances in Internet of Things", IEEE International Conference on Consumer Electronics (ICCE), Jan 2015
-. Seehwan Yoo, Kuen-Hwan Kwak, Jae-Hyun Jo and Chuck Yoo, "Toward Under-Millisecond I/O Latency in Xen-ARM", The 2nd ACM SIGOPS Asia-Pacific Workshop on Systems (APSys 2011), July 2011. (travel granted from ACM SIGOPS)
-. Jae woo Jeong, Seehwan Yoo, Chuck Yoo, "PARFAIT: A New Scheduler Framework supporting Heterogeneous Xen-ARM Schedulers," 8th Annual IEEE Consumer Communications & Networking Conference (IEEE CCNC 2011), Jan. 2011.
-. Seehwan Yoo, Young-Pil Kim, Chuck Yoo, "Real-time Scheduling in Virtualized CE Devices", 28th IEEE International Conference on Consumer Electronics (IEEE ICCE 2010), Jan. 2010.
-. Seehwan Yoo, Miri Park, Chuck Yoo, "A Step to Support Real-time in a Virtual Machine Monitor", 6th Annual IEEE Consumer Communications & Networking Conference (IEEE CCNC 2009), Jan. 2009.
-. Seehwan Yoo, Cheol-ho Hong, Chuck Yoo, Yunxin Liu, Youngguang Zhang, "MobiVMM: a VMM for Mobile Phones", The Workshop on Virtualization in Mobile Computing Held in conjunction with MobiSys 2008 (MobiVirt 2008), Sep. 2008.
-. Seehwan Yoo, "VMM for Mobile Phones," The 2nd EuroSys Doctoral Workshop organized by the European Chapter of ACM SIGOPS, no off-prints, Apr. 2008.
-. Cheol-Ho Hong, Miri Park, Seehwan Yoo, Chuck Yoo, "Hypervisor Design Considering Network Performance for Multi-core CE Devices", 28th Annual IEEE International Conference on Consumer Electronics (IEEE ICCE 2010), Jan. 2010.
-. Cheol-Ho Hong, Seehwan Yoo, Chuck Yoo, "HPFS: High Performance Fair VM Scheduler for the Scalable Multi-core SMP System," The 3rd EuroSys Doctoral Workshop organized by the European Chapter of ACM SIGOPS, no off-prints, Apr. 2009.
-. Jae-Hyun Hwang, See-Hwan Yoo, and Chuck Yoo, "TCP Feno: Enhancement for Higher Accuracy of Loss Differentiation Over Small Buffer Heterogeneous Networks," The 34th IEEE Conference on Local Computer Networks (LCN 2009), Oct. 2009.
-. ShinHyoung Lee, SeeHwan Yoo, SangSun Byun, and Chuck Yoo, "BO-Multicast: Boolean Operation Multicast," 12th Asia-Pacific Conference on Communications (APCC 2006), Aug. 2006.
-. See-hwan Yoo, Jin-Hee Choi, Jae-Hyun Hwang, and Chuck Yoo, "Eliminating the Performance Anomaly of 802.11b," In Proceedings of International Conference on Networking 2005(ICN 2005), Apr. 2005.
-. Jin-Hee Choi, See-Hwan Yoo, and Chuck Yoo, "An enhancement scheme for TCP over mobile ad hoc networks," In Proceedings of the The 57th IEEE Semiannual Vehicular Technology Conference, 2003 (VTC 2003-Spring). , vol.3, pp. 1522-1526 vol.3, 22-25 April 2003
-. Jin-Hee Choi, See-Hwan Yoo, and Chuck Yoo, "A flow control scheme based on buffer state for wireless TCP," In Proceedings of the 4th International Workshop on Mobile and Wireless Communications Network, 2002 (MWCN 2002), pp. 592-596, 2002
+30 domestic conferences/journal articles (refer http://os.korea.ac.kr/publication.html )
Patents
-. US Patent No: 7,490,160 Method of efficiently transmitting/receiving data using transport layer in a mobile ad hoc network, and network device using the method
-. US Patent No: 7,336,608 Method for adjusting a transmission rate to obtain the optimum transmission rate in a mobile ad hoc network environment
+ 6 domestic/international patents (for the same contents)
+ 1 domestic patent