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[LDM #DSW-144649]: LDM 6.7.0.3 performance improvement with dcgrib2---just wondering

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  • Subject: [LDM #DSW-144649]: LDM 6.7.0.3 performance improvement with dcgrib2---just wondering
  • Date: Mon, 08 Sep 2008 10:52:57 -0600
Gilbert,

> While it's not pegging my CPU at 99% anymore, it's still pretty high on my
> machine running Fedora 8:
> 
> top - 12:28:28 up 3 days,  2:34,  3 users,  load average: 2.21, 1.85, 1.29
> 
> Tasks: 240 total,   1 running, 239 sleeping,   0 stopped,   0 zombie
> Cpu0  : 13.2%us,  5.6%sy,  0.0%ni, 77.5%id,  3.6%wa,  0.0%hi,  0.0%si,
> 0.0%st
> Cpu1  :  1.6%us,  5.6%sy,  0.0%ni, 92.5%id,  0.0%wa,  0.0%hi,  0.3%si,
> 0.0%st
> Cpu2  : 18.9%us,  5.6%sy,  0.0%ni, 73.8%id,  1.7%wa,  0.0%hi,  0.0%si,
> 0.0%st
> Cpu3  : 16.4%us,  5.6%sy,  0.0%ni, 77.4%id,  0.7%wa,  0.0%hi,  0.0%si,
> 0.0%st
> Mem:   3368604k total,  3243140k used,   125464k free,    74872k buffers
> Swap:  2031608k total,    18484k used,  2013124k free,  2672508k cached
> 
> PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
> 4396 ldm       20   0 50548 7752  832 S   30  0.2   1:08.31 dcgrib2
> 
> ----
> Just thought you'd want to know in case it's not as good as you want it
> to be.

It is what it is.  The dcgrib2(1) program uses a lot of resources.  The
changes I made just stop it from being interrupted by SIGCONTs from the
LDM process group: it's still going to use a lot of resources.

> Take care!

You too.  Thanks for reporting on this.

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: DSW-144649
Department: Support LDM
Priority: Normal
Status: Closed