[Fwd: issue with -j 2]

[Antoine Petitet]

Hi Folks,

I sent this message to help mailing alias. I should have sent it
maybe to this alias, eventhough, it is not obvious to me at this
point that the issue is in GNU make.

Best wishes,

Antoine
> --- Begin Message ---
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> Subject: 
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> issue with -j 2 
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> Date: 
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> Tue, 17 Feb 2009 09:49:59 +0100
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> User-agent: 
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> Mozilla Thunderbird 1.0RC1 (X11/20041209)
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>
> Hi,
>
> GNU Make version 3.79.1, by Richard Stallman and Roland McGrath.
> GNU C Library stable release version 2.3.2, by Roland McGrath et al.
> (Red Hat Enterprise Linux WS release 3 (Taroon Update 6))
>
> I am having a problem when builing my software library with the option
> -j 2. It works fine with all other -j N I tried.  A child process seems
> to have dissapeared before the end of the make of command. The object
> file however is indeed produced. It does not always happen at the same
> place. Sometimes even the make -j 2 works fine up to the end. Below is
> the end of a run that fails.
>
> I tried 3.8.1 and observed the same behaviour. I looked at the file
> jobs.c of the 3.8.1 version and if I change line 565
>              pfatal_with_name ("wait");
> into
>              if( ! WIFEXITED( status ) ) pfatal_with_name ("wait");
> the problem dissapears. It seems that the child has already normally
> terminated when the wait function occurs, the value of pid is < 0,
> and the program exits calling pfatal_with_name.
>
> I could not find any related post on the web concerning this. I would
> be grateful if you could tell me if this is a behavior you have heard
> of before. Obviously, I can be wrong and the problem could be somewhere
> else. Any suggestion on what I could be doing wrong would be highly
> appreciated. If you are interested, I can provide you with the sources.
>
> Best wishes,
>
> Antoine
>
>
> (...)
> Obtained token for child 0x005e17e0 (obj/els/els_dlamch.o).
> icc -O0  -I/nisprod/products1/mkl/10.1.0.015/include -DLINUX -DEM64T 
> -DELS_COMP_INTEL -DELS_VARI_DEFAULT -openmp -fpic -vec-report0 
> -DELS_DEBUG -DELS_ARGS_CHECK  -I/tmp/ape/els/include 
> -I/tmp/ape/els/src/contrib/cblas/include 
> -I/tmp/ape/els/src/contrib/MUMPS_4.8.4/include 
> -I/tmp/ape/els/src/contrib/MUMPS_4.8.4/src 
> -I/tmp/ape/els/src/contrib/MUMPS_4.8.4/libseq  -mtune=core2 -xO -c  
> /tmp/ape/els/src/kernel/els_dlamch.c -o obj/els/els_dlamch.o
> Putting child 0x005e17e0 (obj/els/els_dlamch.o) PID 14323 on the chain.
>  Commands of `obj/els/els_dlamch.o' are being run.
>   Pruning file `/tmp/ape/els/src/kernel/els_dlamch.c'.
> Finished prerequisites of target file `elslibbeg'.
> The prerequisites of `elslibbeg' are being made.
> Pruning file `obj/els/els_slamch.o'.
> Pruning file `obj/els/els_dlamch.o'.
> Live child 0x005e17e0 (obj/els/els_dlamch.o) PID 14323
> Live child 0x005e1500 (obj/els/els_slamch.o) PID 14322
> Got a SIGCHLD; 1 unreaped children.
> Reaping winning child 0x005e17e0 PID 14323
> Removing child 0x005e17e0 PID 14323  from chain.
> Released token for child 0x005e17e0 (obj/els/els_dlamch.o).
> Live child 0x005e1500 (obj/els/els_slamch.o) PID 14322
> Got a SIGCHLD; 1 unreaped children.
> make[2]: *** wait: No child processes.  Stop.
> make[2]: *** Waiting for unfinished jobs....
> Live child 0x005e1500 (obj/els/els_slamch.o) PID 14322
> Reaping winning child 0x005e1500 PID 14322
> Removing child 0x005e1500 PID 14322  from chain.
> make[2]: Leaving directory `/tmp/ape/Linux_em64t'
> Got a SIGCHLD; 1 unreaped children.
> Reaping losing child 0x005df2b0 PID 14168
> make[1]: *** [elslib] Error 2
> Removing child 0x005df2b0 PID 14168  from chain.
> make[1]: Leaving directory `/tmp/ape/Linux_em64t'
> Got a SIGCHLD; 1 unreaped children.
> Reaping losing child 0x00545130 PID 13849
> make: *** [elslib] Error 2
> Removing child 0x00545130 PID 13849  from chain.
>
>
>
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> --- End Message ---