[Insight-developers] RE: itkParallelSparseFieldLevelSetImageFilterTest - Deadlock
Miller, James V (Research)
millerjv at crd . ge . com
Fri, 15 Aug 2003 13:52:25 -0400
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I think this might be related to the use of the Barrier class. A single
instance of the barrier object is used to synchronize the code in multiple
places. I think what may be happening in the single processor case is that
once the barrier is satisfied, the threads start unrolling from the barrier
and continue on. I think one thread is making it to the next barrier before
all the threads of finished unrolling from the first barrier.
(My current best guess.)
-----Original Message-----
From: Miller, James V (Research)
Sent: Friday, August 15, 2003 11:06 AM
To: Josh Cates (E-mail); Insight-developers (E-mail)
Subject: itkParallelSparseFieldLevelSetImageFilterTest - Deadlock
This test gets into a deadlock on my uniprocessor PC using Visual Studio
.NET.
Jim Miller
_____________________________________
Visualization & Computer Vision
GE Research
Bldg. KW, Room C218B
P.O. Box 8, Schenectady NY 12301
millerjv at research . ge . com <mailto:millerjv at research . ge . com>
james . miller at research . ge . com
(518) 387-4005, Dial Comm: 8*833-4005,
Cell: (518) 505-7065, Fax: (518) 387-6981
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<DIV><FONT color=#0000ff size=2><SPAN class=100264817-15082003>I think this
might be related to the use of the Barrier class. A single instance of the
barrier object is used to synchronize the code in multiple places. I think
what may be happening in the single processor case is that once the barrier is
satisfied, the threads start unrolling from the barrier and continue on. I
think one thread is making it to the next barrier before all the threads of
finished unrolling from the first barrier. </SPAN></FONT></DIV>
<DIV><FONT color=#0000ff size=2><SPAN
class=100264817-15082003></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff size=2><SPAN class=100264817-15082003>(My current best
guess.)</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff size=2><SPAN
class=100264817-15082003></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff size=2><SPAN
class=100264817-15082003></SPAN></FONT> </DIV>
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<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Miller, James V (Research)
<BR><B>Sent:</B> Friday, August 15, 2003 11:06 AM<BR><B>To:</B> Josh Cates
(E-mail); Insight-developers (E-mail)<BR><B>Subject:</B>
itkParallelSparseFieldLevelSetImageFilterTest - Deadlock<BR><BR></FONT></DIV>
<DIV><SPAN class=234420415-15082003><FONT size=2>This test gets into a
deadlock on my uniprocessor PC using Visual Studio .NET.</FONT></SPAN></DIV>
<DIV><SPAN class=234420415-15082003><FONT size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=234420415-15082003><FONT size=2></FONT></SPAN> </DIV>
<DIV>
<P style="MARGIN: 0in 0in 0pt"><B><SPAN
style="COLOR: navy; FONT-FAMILY: 'Comic Sans MS'">Jim Miller</SPAN></B>
<BR><B><I><SPAN
style="FONT-SIZE: 10pt; COLOR: red; FONT-FAMILY: Arial">_____________________________________</SPAN></I></B><BR><EM><SPAN
style="FONT-SIZE: 7.5pt; COLOR: black; FONT-FAMILY: Arial">Visualization &
Computer Vision</SPAN></EM><I><SPAN
style="FONT-SIZE: 7.5pt; COLOR: black; FONT-FAMILY: Arial"><BR><EM>GE
Research</EM><BR><EM>Bldg. KW, Room C218B</EM><BR><EM>P.O. Box 8, Schenectady
NY 12301</EM><BR><BR></SPAN></I><EM><U><SPAN
style="FONT-SIZE: 7.5pt; COLOR: blue"><A
href="mailto:millerjv at research . ge . com">millerjv at research . ge . com</A></SPAN></U></EM></P>
<P style="MARGIN: 0in 0in 0pt"><EM><U><SPAN
style="FONT-SIZE: 7.5pt; COLOR: blue">james . miller at research . ge . com</SPAN></U></EM><BR><I><SPAN
style="FONT-SIZE: 7.5pt; COLOR: black; FONT-FAMILY: Arial">(518) 387-4005,
Dial Comm: 8*833-4005, </SPAN></I><BR><I><SPAN
style="FONT-SIZE: 7.5pt; COLOR: black; FONT-FAMILY: Arial">Cell: (518)
505-7065, Fax: (518) 387-6981</SPAN></I> </P></DIV>
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