[GE users] SGE on SGI IA 64 Linux 2.4, glibc 2.2

rayson rayrayson at gmail.com
Tue Feb 17 19:47:08 GMT 2009


On 2/17/09, skhan <skhan at ap.smu.ca> wrote:
> It is an unexpected behavior for me to see the threaded qmaster. I do not see this at other sites where we are running SGE 6.1.

May be because your other sites have the qmaster running on Linux 2.6 kernels.

With Linux 2.4 or earlier, LinuxThreads are "processes sharing the
same address space", and 2.6 kernels have NPTL. As the implementation
of "threads" are different inside the kernel, the output you get from
ps is slightly different.

You can google for LinuxThreads NPTL for further info...

Rayson



>
> ps f -eo pid,ppid,uid,gid,user,pgrp,command --cols=130
>
> 15079     1     0     0 root     15077 /opt/sge/bin/ulx24-ia64/sge_qmaster
> 15082 15079     0     0 root     15077  \_ /opt/sge/bin/ulx24-ia64/sge_qmaster
> 15083 15082     0     0 root     15077      \_ /opt/sge/bin/ulx24-ia64/sge_qmaster
> 15084 15082     0     0 root     15077      \_ /opt/sge/bin/ulx24-ia64/sge_qmaster
> 15085 15082     0     0 root     15077      \_ /opt/sge/bin/ulx24-ia64/sge_qmaster
> 15086 15082     0     0 root     15077      \_ /opt/sge/bin/ulx24-ia64/sge_qmaster
> 15087 15082     0     0 root     15077      \_ /opt/sge/bin/ulx24-ia64/sge_qmaster
> 15092 15082     0     0 root     15077      \_ /opt/sge/bin/ulx24-ia64/sge_qmaster
> 15093 15082     0     0 root     15077      \_ /opt/sge/bin/ulx24-ia64/sge_qmaster
> 15094 15082     0     0 root     15077      \_ /opt/sge/bin/ulx24-ia64/sge_qmaster
> 15095 15082     0     0 root     15077      \_ /opt/sge/bin/ulx24-ia64/sge_qmaster
> 15099     1     0     0 root     15099 /opt/sge/bin/ulx24-ia64/sge_schedd
> 15100 15099     0     0 root     15098  \_ /opt/sge/bin/ulx24-ia64/sge_schedd
> 15101 15100     0     0 root     15098      \_ /opt/sge/bin/ulx24-ia64/sge_schedd
> 15102 15100     0     0 root     15098      \_ /opt/sge/bin/ulx24-ia64/sge_schedd
> 15103 15100     0     0 root     15098      \_ /opt/sge/bin/ulx24-ia64/sge_schedd
> 15104 15100     0     0 root     15098      \_ /opt/sge/bin/ulx24-ia64/sge_schedd
> 15169     1     0     0 root     15169 /opt/sge/bin/ulx24-ia64/sge_execd
>
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