Environnement Commun Linux : Différence entre versions

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**'''BASE_ARCH''' : name of the hardware architecture of the machine  
 
**'''BASE_ARCH''' : name of the hardware architecture of the machine  
 
**'''EC_ARCH''' : name of the hardware+software architecture of the machine ('''BASE_ARCH''' + compiler usually)  
 
**'''EC_ARCH''' : name of the hardware+software architecture of the machine ('''BASE_ARCH''' + compiler usually)  
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*Useful memory layout information
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**Linux memory layout<br><pre>128 TB ---------------------------------  Top of memory
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                    |  thread 0 (master) stack
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                    |  local variables
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                    \ /
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 +
 +
                    / \
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                    |
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                    |  heap (allocate/malloc)
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~44 TB ---------------------------------
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                    |  thread N stack
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                    |
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                    \ /
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                    |  thread N-1 stack
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                    |
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                    \ /
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                    ...
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                    |  thread 1 stack
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                    |
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                    \ /
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 +
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                    / \
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                    |  code + static data
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                    |  (common blocks + some main program arrays)
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                    |
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000    ----------------------------------  Bottom of memory
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</pre>
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**'''OMP_STACKSIZE''' environment variable controls thread (&gt;0) stack size
 
*Useful information about system  
 
*Useful information about system  
 
**'''/proc/cpuinfo'''&nbsp;: pseudo file containing a full description of logical cpus in a linux system (cat/less/more)<br>  
 
**'''/proc/cpuinfo'''&nbsp;: pseudo file containing a full description of logical cpus in a linux system (cat/less/more)<br>  
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*useful commands<br>
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*useful commands<br>  
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**'''r.mpirun''' : script front end to mpiexec hiding machine/mpi implementation specific details
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**'''r.mpirun'''&nbsp;: script front end to mpiexec hiding machine/mpi implementation specific details  
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**'''soumet''' : script used to submit jobs, hiding machine/batch subsystem specific details<br>
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**'''soumet'''&nbsp;: script used to submit jobs, hiding machine/batch subsystem specific details<br>

Version depuis le 21 de novembre 2011 à 13:17

en construction(cette page s'adresse principalement aux développeurs)

under construction(this page is mainly for developers)

  • Useful environment variables
    • PATH : colon ':' separated list of directories where executables or sourced (.) shell includes are to be found
    • LD_LIBRARY_PATH : colon ':' separated list of directories where dynamic libraries (.so files) needed by executables can be found
    • EC_LD_LIBRARY_PATH : colon ':' separated list of directories where s.compile, s.f90  et al. will look for libraries
    • EC_INCLUDE_PATH : colon ':' separated list of directories where s.compile, s.f90  et al. will look for include files
    • BASE_ARCH : name of the hardware architecture of the machine
    • EC_ARCH : name of the hardware+software architecture of the machine (BASE_ARCH + compiler usually)
  • Useful memory layout information
    • Linux memory layout
      128 TB ---------------------------------  Top of memory
                    |   thread 0 (master) stack
                    |   local variables
                   \ /



                   / \
                    |
                    |   heap (allocate/malloc)

~44 TB --------------------------------- 

                    |   thread N stack
                    |
                   \ /

                    |   thread N-1 stack
                    |
                   \ /

                   ...

                    |   thread 1 stack
                    |
                   \ /



                   / \
                    |   code + static data
                    |   (common blocks + some main program arrays)
                    |

000 ---------------------------------- Bottom of memory

    • OMP_STACKSIZE environment variable controls thread (>0) stack size
  • Useful information about system
    • /proc/cpuinfo : pseudo file containing a full description of logical cpus in a linux system (cat/less/more)
  • useful commands
    • r.mpirun : script front end to mpiexec hiding machine/mpi implementation specific details
    • soumet : script used to submit jobs, hiding machine/batch subsystem specific details
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