<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML xmlns="http://www.w3.org/TR/REC-html40" xmlns:v =
"urn:schemas-microsoft-com:vml" xmlns:o =
"urn:schemas-microsoft-com:office:office" xmlns:w =
"urn:schemas-microsoft-com:office:word" xmlns:x =
"urn:schemas-microsoft-com:office:excel" xmlns:p =
"urn:schemas-microsoft-com:office:powerpoint" xmlns:a =
"urn:schemas-microsoft-com:office:access" xmlns:dt =
"uuid:C2F41010-65B3-11d1-A29F-00AA00C14882" xmlns:s =
"uuid:BDC6E3F0-6DA3-11d1-A2A3-00AA00C14882" xmlns:rs =
"urn:schemas-microsoft-com:rowset" xmlns:z = "#RowsetSchema" xmlns:b =
"urn:schemas-microsoft-com:office:publisher" xmlns:ss =
"urn:schemas-microsoft-com:office:spreadsheet" xmlns:c =
"urn:schemas-microsoft-com:office:component:spreadsheet" xmlns:odc =
"urn:schemas-microsoft-com:office:odc" xmlns:oa =
"urn:schemas-microsoft-com:office:activation" xmlns:html =
"http://www.w3.org/TR/REC-html40" xmlns:q =
"http://schemas.xmlsoap.org/soap/envelope/" xmlns:rtc =
"http://microsoft.com/officenet/conferencing" XMLNS:D = "DAV:" XMLNS:Repl =
"http://schemas.microsoft.com/repl/" xmlns:mt =
"http://schemas.microsoft.com/sharepoint/soap/meetings/" xmlns:x2 =
"http://schemas.microsoft.com/office/excel/2003/xml" xmlns:ppda =
"http://www.passport.com/NameSpace.xsd" xmlns:ois =
"http://schemas.microsoft.com/sharepoint/soap/ois/" xmlns:dir =
"http://schemas.microsoft.com/sharepoint/soap/directory/" xmlns:ds =
"http://www.w3.org/2000/09/xmldsig#" xmlns:dsp =
"http://schemas.microsoft.com/sharepoint/dsp" xmlns:udc =
"http://schemas.microsoft.com/data/udc" xmlns:xsd =
"http://www.w3.org/2001/XMLSchema" xmlns:sub =
"http://schemas.microsoft.com/sharepoint/soap/2002/1/alerts/" xmlns:ec =
"http://www.w3.org/2001/04/xmlenc#" xmlns:sp =
"http://schemas.microsoft.com/sharepoint/" xmlns:sps =
"http://schemas.microsoft.com/sharepoint/soap/" xmlns:xsi =
"http://www.w3.org/2001/XMLSchema-instance" xmlns:udcs =
"http://schemas.microsoft.com/data/udc/soap" xmlns:udcxf =
"http://schemas.microsoft.com/data/udc/xmlfile" xmlns:udcp2p =
"http://schemas.microsoft.com/data/udc/parttopart" xmlns:wf =
"http://schemas.microsoft.com/sharepoint/soap/workflow/" xmlns:dsss =
"http://schemas.microsoft.com/office/2006/digsig-setup" xmlns:dssi =
"http://schemas.microsoft.com/office/2006/digsig" xmlns:mdssi =
"http://schemas.openxmlformats.org/package/2006/digital-signature" xmlns:mver =
"http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:m =
"http://schemas.microsoft.com/office/2004/12/omml" xmlns:mrels =
"http://schemas.openxmlformats.org/package/2006/relationships" xmlns:spwp =
"http://microsoft.com/sharepoint/webpartpages" xmlns:ex12t =
"http://schemas.microsoft.com/exchange/services/2006/types" xmlns:ex12m =
"http://schemas.microsoft.com/exchange/services/2006/messages" xmlns:pptsl =
"http://schemas.microsoft.com/sharepoint/soap/SlideLibrary/" xmlns:spsl =
"http://microsoft.com/webservices/SharePointPortalServer/PublishedLinksService"
XMLNS:Z = "urn:schemas-microsoft-com:" xmlns:st = ""><HEAD>
<META content="text/html; charset=us-ascii" http-equiv=Content-Type>
<META name=GENERATOR content="MSHTML 8.00.6001.18783">
<STYLE>@font-face {
font-family: Calibri;
}
@page Section1 {size: 8.5in 11.0in; margin: 1.0in 1.0in 1.0in 1.0in; }
P.MsoNormal {
MARGIN: 0in 0in 0pt; FONT-FAMILY: "Calibri","sans-serif"; FONT-SIZE: 11pt
}
LI.MsoNormal {
MARGIN: 0in 0in 0pt; FONT-FAMILY: "Calibri","sans-serif"; FONT-SIZE: 11pt
}
DIV.MsoNormal {
MARGIN: 0in 0in 0pt; FONT-FAMILY: "Calibri","sans-serif"; FONT-SIZE: 11pt
}
A:link {
COLOR: blue; TEXT-DECORATION: underline; mso-style-priority: 99
}
SPAN.MsoHyperlink {
COLOR: blue; TEXT-DECORATION: underline; mso-style-priority: 99
}
A:visited {
COLOR: purple; TEXT-DECORATION: underline; mso-style-priority: 99
}
SPAN.MsoHyperlinkFollowed {
COLOR: purple; TEXT-DECORATION: underline; mso-style-priority: 99
}
P.MsoListParagraph {
MARGIN: 0in 0in 0pt 0.5in; FONT-FAMILY: "Calibri","sans-serif"; FONT-SIZE: 11pt; mso-style-priority: 34
}
LI.MsoListParagraph {
MARGIN: 0in 0in 0pt 0.5in; FONT-FAMILY: "Calibri","sans-serif"; FONT-SIZE: 11pt; mso-style-priority: 34
}
DIV.MsoListParagraph {
MARGIN: 0in 0in 0pt 0.5in; FONT-FAMILY: "Calibri","sans-serif"; FONT-SIZE: 11pt; mso-style-priority: 34
}
SPAN.EmailStyle17 {
FONT-FAMILY: "Calibri","sans-serif"; COLOR: windowtext; mso-style-type: personal-compose
}
.MsoChpDefault {
mso-style-type: export-only
}
DIV.Section1 {
page: Section1
}
OL {
MARGIN-BOTTOM: 0in
}
UL {
MARGIN-BOTTOM: 0in
}
</STYLE>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></HEAD>
<BODY lang=EN-US link=blue vLink=purple>
<DIV dir=ltr align=left><SPAN class=868564821-14072009><FONT color=#0000ff
size=2 face=Arial>Mike,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=868564821-14072009><FONT color=#0000ff
size=2 face=Arial> Since this is
related to MVAPICH2, I have forwarded your note to the <A
href="mailto:mvapich-discuss@cse.ohio-state.edu">mvapich-discuss@cse.ohio-state.edu</A>
mailing list.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=868564821-14072009><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=868564821-14072009><FONT color=#0000ff
size=2 face=Arial>Rajeev</FONT></SPAN></DIV><BR>
<BLOCKQUOTE
style="BORDER-LEFT: #0000ff 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px"
dir=ltr>
<DIV dir=ltr lang=en-us class=OutlookMessageHeader align=left>
<HR tabIndex=-1>
<FONT size=2 face=Tahoma><B>From:</B> mpich2-dev-bounces@mcs.anl.gov
[mailto:mpich2-dev-bounces@mcs.anl.gov] <B>On Behalf Of </B>Mike
Heinz<BR><B>Sent:</B> Tuesday, July 14, 2009 4:04 PM<BR><B>To:</B>
mpich2-dev@mcs.anl.gov<BR><B>Cc:</B> Todd Rimmer<BR><B>Subject:</B>
[mpich2-dev] Need a hint in debugging a problem that only affects a few
machines in our cluster.<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal>We’re having a very odd problem with our fabric, where, out
of the entire cluster, machine “A” can’t run mvapich2 programs with
machine “B”, and machine “C” can’t run programs with machine “D” – even
though “A” can run with “D” and “B” can run with “C” – and the rest of the
fabric works fine.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P style="TEXT-INDENT: -0.25in; mso-list: l0 level1 lfo1"
class=MsoListParagraph><![if !supportLists]><SPAN
style="mso-list: Ignore">1)<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN><![endif]>There are no IB errors anywhere on the fabric that I
can find, and the machines in question all work correctly with mvapich1 and
low-level IB tests.<o:p></o:p></P>
<P style="TEXT-INDENT: -0.25in; mso-list: l0 level1 lfo1"
class=MsoListParagraph><![if !supportLists]><SPAN
style="mso-list: Ignore">2)<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN><![endif]>The problem occurs whether using mpd or
rsh.<o:p></o:p></P>
<P style="TEXT-INDENT: -0.25in; mso-list: l0 level1 lfo1"
class=MsoListParagraph><![if !supportLists]><SPAN
style="mso-list: Ignore">3)<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN><![endif]>If I attach to the running processes, both machines
appear to be waiting for a read operation to complete. (See
below)<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Can anyone make a suggestion on how to debug this?
<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Stack trace for node 0:<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>#0 0x000000361160abb5 in pthread_spin_lock () from
/lib64/libpthread.so.0<o:p></o:p></P>
<P class=MsoNormal>#1 0x00002aaaab08fb6c in mthca_poll_cq
(ibcq=0x2060980, ne=1,<o:p></o:p></P>
<P class=MsoNormal> wc=0x7fff9d835900) at
src/cq.c:468<o:p></o:p></P>
<P class=MsoNormal>#2 0x00002aaaaab5d8d8 in MPIDI_CH3I_MRAILI_Cq_poll
(<o:p></o:p></P>
<P class=MsoNormal> vbuf_handle=0x7fff9d8359d8, vc_req=0x0,
receiving=0, is_blocking=1)<o:p></o:p></P>
<P class=MsoNormal> at
/usr/include/infiniband/verbs.h:934<o:p></o:p></P>
<P class=MsoNormal>#3 0x00002aaaaab177fa in MPIDI_CH3I_read_progress
(vc_pptr=0x7fff9d8359e0,<o:p></o:p></P>
<P class=MsoNormal> v_ptr=0x7fff9d8359d8, is_blocking=1) at
ch3_read_progress.c:143<o:p></o:p></P>
<P class=MsoNormal>#4 0x00002aaaaab17464 in MPIDI_CH3I_Progress
(is_blocking=1,<o:p></o:p></P>
<P class=MsoNormal> state=<value optimized out>) at
ch3_progress.c:202<o:p></o:p></P>
<P class=MsoNormal>#5 0x00002aaaaab5bc4e in MPIC_Wait
(request_ptr=0x2aaaaae19800)<o:p></o:p></P>
<P class=MsoNormal> at helper_fns.c:269<o:p></o:p></P>
<P class=MsoNormal>#6 0x00002aaaaab5c043 in MPIC_Sendrecv
(sendbuf=0x217fc50, sendcount=2,<o:p></o:p></P>
<P class=MsoNormal> sendtype=1275069445, dest=1, sendtag=7,
recvbuf=0x217fc58, recvcount=2,<o:p></o:p></P>
<P class=MsoNormal> recvtype=1275069445, source=1,
recvtag=7, comm=1140850688,<o:p></o:p></P>
<P class=MsoNormal> status=0x7fff9d835b60) at
helper_fns.c:125<o:p></o:p></P>
<P class=MsoNormal>#7 0x00002aaaaaafe387 in MPIR_Allgather
(sendbuf=<value optimized out>,<o:p></o:p></P>
<P class=MsoNormal> sendcount=<value optimized out>,
sendtype=1275069445, recvbuf=0x217fc50,<o:p></o:p></P>
<P class=MsoNormal> recvcount=2, recvtype=1275069445,
comm_ptr=0x2aaaaae1c1e0)<o:p></o:p></P>
<P class=MsoNormal> at allgather.c:192<o:p></o:p></P>
<P class=MsoNormal>#8 0x00002aaaaaafeff9 in PMPI_Allgather
(sendbuf=0xffffffffffffffff,<o:p></o:p></P>
<P class=MsoNormal> sendcount=2, sendtype=1275069445,
recvbuf=0x217fc50, recvcount=2,<o:p></o:p></P>
<P class=MsoNormal> recvtype=1275069445, comm=1140850688) at
allgather.c:866<o:p></o:p></P>
<P class=MsoNormal>---Type <return> to continue, or q <return> to
quit---<o:p></o:p></P>
<P class=MsoNormal>#9 0x00002aaaaab3b00b in PMPI_Comm_split
(comm=1140850688, color=0, key=0,<o:p></o:p></P>
<P class=MsoNormal> newcomm=0x2aaaaae1c2f4) at
comm_split.c:196<o:p></o:p></P>
<P class=MsoNormal>#10 0x00002aaaaab3cd84 in create_2level_comm
(comm=1140850688, size=2,<o:p></o:p></P>
<P class=MsoNormal> my_rank=<value optimized out>) at
create_2level_comm.c:142<o:p></o:p></P>
<P class=MsoNormal>#11 0x00002aaaaab6877d in PMPI_Init (argc=0x7fff9d835e7c,
argv=0x7fff9d835e70)<o:p></o:p></P>
<P class=MsoNormal> at init.c:146<o:p></o:p></P>
<P class=MsoNormal>#12 0x0000000000400b2f in main (argc=3,
argv=0x7fff9d835fb8) at bw.c:27<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Stack trace for node 1:<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>#0 0x00002ac3cbdac2d2 in MPIDI_CH3I_read_progress
(vc_pptr=0x7fffdee81020,<o:p></o:p></P>
<P class=MsoNormal> v_ptr=0x7fffdee81018, is_blocking=1) at
ch3_read_progress.c:143<o:p></o:p></P>
<P class=MsoNormal>#1 0x00002ac3cbdabf44 in MPIDI_CH3I_Progress
(is_blocking=1,<o:p></o:p></P>
<P class=MsoNormal> state=<value optimized out>) at
ch3_progress.c:202<o:p></o:p></P>
<P class=MsoNormal>#2 0x00002ac3cbdf060e in MPIC_Wait
(request_ptr=0x2ac3cbfae2a0)<o:p></o:p></P>
<P class=MsoNormal> at helper_fns.c:269<o:p></o:p></P>
<P class=MsoNormal>#3 0x00002ac3cbdf0a03 in MPIC_Sendrecv
(sendbuf=0xf79028, sendcount=2,<o:p></o:p></P>
<P class=MsoNormal> sendtype=1275069445, dest=0, sendtag=7,
recvbuf=0xf79020, recvcount=4,<o:p></o:p></P>
<P class=MsoNormal> recvtype=1275069445, source=0,
recvtag=7, comm=1140850688,<o:p></o:p></P>
<P class=MsoNormal> status=0x7fffdee811a0) at
helper_fns.c:125<o:p></o:p></P>
<P class=MsoNormal>#4 0x00002ac3cbd92ddb in MPIR_Allgather
(sendbuf=<value optimized out>,<o:p></o:p></P>
<P class=MsoNormal> sendcount=<value optimized out>,
sendtype=1275069445, recvbuf=0xf79020,<o:p></o:p></P>
<P class=MsoNormal> recvcount=2, recvtype=1275069445,
comm_ptr=0x2ac3cbfb0c80)<o:p></o:p></P>
<P class=MsoNormal> at allgather.c:192<o:p></o:p></P>
<P class=MsoNormal>#5 0x00002ac3cbd93a45 in PMPI_Allgather
(sendbuf=0xffffffffffffffff,<o:p></o:p></P>
<P class=MsoNormal> sendcount=2, sendtype=1275069445,
recvbuf=0xf79020, recvcount=2,<o:p></o:p></P>
<P class=MsoNormal> recvtype=1275069445, comm=1140850688) at
allgather.c:866<o:p></o:p></P>
<P class=MsoNormal>#6 0x00002ac3cbdcf91b in PMPI_Comm_split
(comm=1140850688, color=1, key=0,<o:p></o:p></P>
<P class=MsoNormal> newcomm=0x2ac3cbfb0d94) at
comm_split.c:196<o:p></o:p></P>
<P class=MsoNormal>#7 0x00002ac3cbdd18f4 in create_2level_comm
(comm=1140850688, size=2,<o:p></o:p></P>
<P class=MsoNormal> my_rank=<value optimized out>) at
create_2level_comm.c:142<o:p></o:p></P>
<P class=MsoNormal>#8 0x00002ac3cbdfd0a5 in PMPI_Init
(argc=0x7fffdee814bc, argv=0x7fffdee814b0)<o:p></o:p></P>
<P class=MsoNormal> at init.c:146<o:p></o:p></P>
<P class=MsoNormal>---Type <return> to continue, or q <return> to
quit---<o:p></o:p></P>
<P class=MsoNormal>#9 0x0000000000400bcf in main (argc=3,
argv=0x7fffdee815f8) at bw.c:27<o:p></o:p></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt">--</SPAN><SPAN
style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt">Michael
Heinz</SPAN><SPAN
style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt">Principal Engineer,
Qlogic Corporation</SPAN><SPAN
style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt">King of Prussia,
Pennsylvania</SPAN><o:p></o:p></P></DIV></BLOCKQUOTE></BODY></HTML>