[kaffe] expect advice!

xk s sensikey@yahoo.com
Wed Nov 12 22:35:02 2003 

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hello:

      I am a master student of BHU (bei hang university) in china. I will preparing my master thesis about Java virtual machine and just-in-time compiler next year.

      In kaffe document, I know it is a simple JIT, it compile each method without advanced optimization the first time this method is invoked. What do you think about hot spot VM and sophisticated adaptive online feedback-directed optimization with muti-level compiler system?

      And I think , there is no explicit transform form bytecode stack semantics to register operations as in many RISC machine. Would you think Sequence struct is a suitful IR for multi-level optimization and adptive optimization? 

      Would you give some instruments and advices? I expected your advice earnestly.

       

             

Yours sincerely 

                                                                                                         Xikun sun

                                                                                                         Nov 13, 2003



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<DIV>
<P class=MsoBodyText style="MARGIN: 0cm 0cm 6pt"><SPAN lang=EN-US><FONT face="Times New Roman" size=3>hello:</FONT></SPAN></P>
<P class=MsoBodyText style="MARGIN: 0cm 0cm 6pt"><SPAN lang=EN-US><FONT face="Times New Roman" size=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; I am a master student of BHU (bei hang university) in china. I will preparing my master thesis about Java virtual machine and just-in-time compiler next year.</FONT></SPAN></P>
<P class=MsoBodyText style="MARGIN: 0cm 0cm 6pt"><SPAN lang=EN-US><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN>In kaffe document, I know it is a simple JIT, it compile each method without advanced optimization the first time this method is invoked. What do you think about hot spot VM and sophisticated adaptive online feedback-directed optimization with muti-level compiler system?</FONT></FONT></SPAN></P>
<P class=MsoBodyText style="MARGIN: 0cm 0cm 6pt"><SPAN lang=EN-US><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>And I think , there is no explicit transform form bytecode stack semantics to register operations as in many RISC machine. Would you think Sequence struct is a suitful IR for multi-level optimization and adptive optimization? </FONT></FONT></SPAN></P>
<P class=MsoBodyText style="MARGIN: 0cm 0cm 6pt"><SPAN lang=EN-US><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN>Would you give some instruments and advices? I expected your advice earnestly.</FONT></FONT></SPAN></P>
<P class=MsoBodyText style="MARGIN: 0cm 0cm 6pt"><SPAN lang=EN-US><SPAN style="mso-tab-count: 1"><FONT face="Times New Roman" size=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </FONT></SPAN></SPAN></P>
<P class=MsoBodyText style="MARGIN: 0cm 0cm 6pt"><SPAN lang=EN-US><SPAN style="mso-tab-count: 1"><FONT face="Times New Roman" size=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT></SPAN></SPAN><SPAN lang=EN-US><SPAN style="mso-tab-count: 1"><FONT face="Times New Roman" size=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </FONT></SPAN></SPAN></P>
<P class=MsoBodyText style="MARGIN: 0cm 0cm 6pt"><SPAN lang=EN-US><FONT face="Times New Roman" size=3>Yours sincerely </FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-tab-count: 3">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN style="mso-tab-count: 3">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN style="mso-tab-count: 3">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN style="mso-tab-count: 3">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN style="mso-tab-count: 3">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>Xikun sun</FONT></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3><FONT face="Times New Roman"><SPAN style="mso-tab-count: 3">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN style="mso-tab-count: 3">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN style="mso-tab-count: 3">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN style="mso-tab-count: 3">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN style="mso-tab-count: 3">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>Nov 13,
 2003</FONT></FONT></SPAN></P></DIV><p><hr SIZE=1>
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