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</o:shapelayout></xml><![endif]--></head><body lang=KO link=blue vlink=purple><div class=WordSection1><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Dear Mr. Koo.<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>There is not any relationship between main thread and pthread1/2/3.<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Main thread is run on core 1 of Cortex-A9.<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Pthread1/2/3 threads is run on core 2 of Cortex-A9.<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>That is, both main thread and pthread1/2/3 is run on each cores independently.<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Also, I used manual affinity using pthread_setaffinity_np().<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Pthread1/2/3 is created by main thread.<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>and, actual operation is using Qt Thread API. I attached simple example code.<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Qt Thread API is calling RTEMS POSIX API.<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Best Regards,<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>JunBeom<o:p></o:p></span></p><p class=MsoNormal style='word-break:break-hangul'><span lang=EN-US style='font-size:10.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> chkoo@kari.re.kr <chkoo@kari.re.kr> <br><b>Sent:</b> Friday, December 28, 2018 4:05 PM<br><b>To:</b> JunBeom Kim (EmbedCoreTech) <jbkim@e-coretech.kr><br><b>Cc:</b> users@rtems.org<br><b>Subject:</b> RE: RTEMS POSIX Priority Inversion Issue.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p><span lang=EN-US style='font-size:10.0pt;font-family:"굴림",serif'>What is the relation between main thread and pthread1/2/3?<o:p></o:p></span></p><p><span lang=EN-US style='font-size:10.0pt;font-family:"굴림",serif'>If the main thread has a control to wake up each pthread1/2/3, it gonna be in trouble when the prioirty</span><span lang=EN-US style='font-size:10.0pt'> </span><span lang=EN-US style='font-size:10.0pt;font-family:"굴림",serif'>of the main thread is lower than pthread1/2/3s because the main thread has never chance to run it, which is required to other threads.<o:p></o:p></span></p><p><span lang=EN-US style='font-size:10.0pt;font-family:"굴림",serif'><o:p> </o:p></span></p><p><span lang=EN-US style='font-size:10.0pt;font-family:"굴림",serif'>However why do you assign so much long integer value to priority?<o:p></o:p></span></p><p><span lang=EN-US style='font-size:10.0pt;font-family:"굴림",serif'><o:p> </o:p></span></p><p><span lang=EN-US style='font-size:10.0pt;font-family:"굴림",serif'>Cheol<o:p></o:p></span></p><div style='margin-left:9.6pt;margin-top:22.5pt'><p class=MsoNormal><b><span lang=EN-US style='font-size:9.0pt;font-family:돋움;color:#0066CC'>--------- </span></b><b><span style='font-size:9.0pt;font-family:돋움;color:#0066CC'>원본 메일<span lang=EN-US> ---------<o:p></o:p></span></span></b></p></div><blockquote style='border:none;border-left:solid windowtext 1.5pt;padding:0cm 0cm 0cm 12.0pt;margin-left:9.6pt;margin-right:0cm'><div><p class=MsoNormal><b><span style='font-size:9.0pt'>보낸사람</span></b><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'> : "JunBeom Kim (EmbedCoreTech)" <<a href="mailto:jbkim@e-coretech.kr">jbkim@e-coretech.kr</a>><br></span><b><span style='font-size:9.0pt'>받는사람</span></b><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'> : <<a href="mailto:users@rtems.org">users@rtems.org</a>><br></span><b><span style='font-size:9.0pt'>받은날짜</span></b><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'> : 2018-12-28 (</span><span style='font-size:9.0pt'>금</span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'>) 15:45:48<br></span><b><span style='font-size:9.0pt'>제목</span></b><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'> : RTEMS POSIX Priority Inversion Issue.<o:p></o:p></span></p><div style='margin-top:3.75pt'><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Dear Sir, </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>I am testing RTEMS POSIX thread priority. </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>I am still using RTEMS 4.12 in 2017 year. </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>There are four pthreads(main, pthread1, pthread2, pthread3) on two cores in my test case. </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:12.0pt;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-para-margin-left:1.0gd'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>- main pthread is running on core 1. </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:12.0pt;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-para-margin-left:1.0gd'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>- pthread1, pthread2, pthread3 is running on core 2. </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:12.0pt;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-para-margin-left:1.0gd'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>- All threads are doing GPIO toggling action in while(1) loop. </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:12.0pt;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-para-margin-left:1.0gd'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>- my configuration for timeslice quantum is 25ms. </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>As I know from RTEMS POSIX manual, there is below statement. </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>In the RTEMS implementation of the POSIX API, the priorities range from the low priority of </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>sched_get_priority_min() to the highest priority of sched_get_priority_max(). Numerically </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>higher values represent higher priorities. </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>But, when I test this, lower value is doing as higher priority. Higher value is doing as lower priority. </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Is this correct operation ? </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Case 0) All threads are same priority. </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>[/] # pthread </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>ID NAME CPU SHED PRI STATE MODES EVENTS WAITINFO </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>------------------------------------------------------------------------------ </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>0b010001 main_thread 1 MEDF 2147483645 READY P:T:nA NONE </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>0b010002 pthread1 2 MEDF 2147483645 READY P:T:nA NONE </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>0b010003 pthread2 2 MEDF 2147483645 READY P:T:nA NONE </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>0b010004 pthread3 2 MEDF 2147483645 READY P:T:nA NONE </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><img border=0 width=655 height=175 style='width:6.8229in;height:1.8229in' id="그림_x0020_1" src="cid:image001.png@01D49EC8.CD765880"><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Case 1) pthread3 is lower priority according to manual. But, pthread3 is higher priority in my case. </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>[/] # pthread </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>ID NAME CPU SHED PRI STATE MODES EVENTS WAITINFO </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>------------------------------------------------------------------------------ </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>0b010001 main_thread 1 MEDF 2147483645 READY P:T:nA NONE </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>0b010002 pthread1 2 MEDF 2147483646 READY P:T:nA NONE </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>0b010003 pthread2 2 MEDF 2147483646 READY P:T:nA NONE </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>0b010004 pthread3 2 MEDF 1789569706 READY P:T:nA NONE </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><img border=0 width=582 height=171 style='width:6.0625in;height:1.7812in' id="그림_x0020_2" src="cid:image002.png@01D49EC8.CD765880"><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Case 2) pthread3 is higher priority according to manual. pthread1 and pthread2 are higher priority than pthread3. </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>[/] # pthread </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>ID NAME CPU SHED PRI STATE MODES EVENTS WAITINFO </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>------------------------------------------------------------------------------ </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>0b010001 main_thread 1 MEDF 2147483645 READY P:T:nA NONE </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>0b010002 pthread1 2 MEDF 1789569706 READY P:T:nA NONE </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>0b010003 pthread2 2 MEDF 1789569706 READY P:T:nA NONE </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>0b010004 pthread3 2 MEDF 2147483646 READY P:T:nA NONE </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><img border=0 width=719 height=175 style='width:7.4895in;height:1.8229in' id="그림_x0020_3" src="cid:image003.png@01D49EC8.CD765880"><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Please advise. </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Best Regards, </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri",sans-serif'>JunBeom Kim </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri",sans-serif'>~~~~~~~~~~~~~~~~~~~~~~ </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri",sans-serif'>President / EmbedCoreTech </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Phone: +82-31-396-5584 </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Fax: +82-504-065-5720 </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Mobile:+82-10-6425-5720 </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Email: <a href="mailto:jbkim@e-coretech.kr">jbkim@e-coretech.kr</a> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Web: <a href="http://www.e-coretech.kr">www.e-coretech.kr</a> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri",sans-serif'>~~~~~~~~~~~~~~~~~~~~~~</span><span lang=EN-GB style='font-size:11.0pt;font-family:"Arial",sans-serif'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:11.0pt;font-family:"Arial",sans-serif'> </span><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif'><o:p> </o:p></span></p></div></blockquote><p class=MsoNormal><span lang=EN-US><img border=0 id="_x0000_i1028" src="https://webmail.kari.re.kr:443/checkread/MTA2NjIz/amJraW1AZS1jb3JldGVjaC5rcg==/"><o:p></o:p></span></p></div></body></html>