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for__acquire_lun

Jason_G_1
Beginner
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I am using VTune on some Fortran code and the call that has risen to the top of my Hotspot list is for__acquire_lun which has something to do with processing reading and writing files. It is used over 15% of the processing time. What does this call specifically mean? How can performance be improved?

Thanks

Jason
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Peter_W_Intel
Employee
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Hi Jason,
Based on your description, your program spent many time on read/write files. You might use LocksAndWaits analysis to see if other cores work during that time.
For Improvemen idea, you may add parallel work when code works on read/write files...create new threads to do other works which don't depends on results of read/write files.
Regards, Peter
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