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nooj
Total Points:
360
Status Points:
310
Green Belt
December 8, 2008 4:38 PM PST
ifort: -ipo-jobs uses less than n jobs, gives no speedup

When I use -ipo-jobs4, hoping to speed up the link phase of my program, I get no speedup.  top shows only one ifort process, requiring 100% of cpu on an 8 core machine with no other programs loading the machine.  My admin group sees the same behavior.  This behavior has been commented on before (http://software.intel.com/en-us/forums/intel-c-compiler/topic/59380/reply/59658/), but with no reply.  

What are limiting factors with splitting the IPO phase?  How can I help the linker do its work faster?  

 

- Fred

 



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