[CHiPPS] Questions About Blis And example of Alps

[Yan Xu]

If you have a TotalView debugger, can try to run through the debugger. It is hard to tell if it is a system error or bug in ALPS.

From: chipps-bounces at list.coin-or.org [mailto:chipps-bounces at list.coin-or.org] On Behalf Of ???
Sent: 2011年11月29日 8:47 上午
To: chipps at list.coin-or.org
Cc: geogrid at gmail.com
Subject: [CHiPPS] Questions About Blis And example of Alps

Dear Sir,
I am now trying to using Alps solve Ip problems.
I have two questions.
First, I solved the knap3(Alps/Alps/Abc/data/knap3.mps) problem using Abc in parallel.
It generate good log file. I can see the work each process has done.
And we can see that a few hundred nodes are searched.
But when I use Blis to solve the same the knap3 problem.
When it is solved, the information shows that only on node searched.
The depth of the search tree is zero.
Why is this?
Second, I use Abc to solve a MIP problem(MPS file: 72MB, 75861 rows, 115173 columns, 1417123 elements) in parallel using 3(2,4 are tried) machines.
But the program goes wrong after more or less 2000 seconds with the put out::
Fatal error in MPI_Test: Other MPI error, error stack:
0: MPI_Test(153)..................: MPI_Test(request=0x7fffe1cdbdb4, flag=0x7fffe1cdbdb0, status=0x7fffe1cdbd50) failed
0: MPIDI_CH3I_Progress(150).......:
0: MPID_nem_mpich2_test_recv(800).:
0: MPID_nem_tcp_connpoll(1720)....:
0: state_commrdy_handler(1556)....:
0: MPID_nem_tcp_recv_handler(1446): socket closed
rank 0 in job 5  vm3-1_33710   caused collective abort of all ranks
  exit status of rank 0: return code 1
Could you tell me why?

Thanks a lot!
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