Intel compiler warning

Hi,

I just compiled mrcc.2014-07-10 with the Intel 11 compiler (./build.mrcc Intel -pOMP) and I get the following warning message (the only one in the list):

Compiling ovirt with options -fpp -O3 -i8 -assume byterecl -DIntel -DINT64 -DOMP
An internal threshold was exceeded for routine MAIN__ and optimization level may be reduced. See software.intel.com/en-us/articles/intern...reshold-was-exceeded for more information and advice.

When following that link, I see this warning suggests that it is possible that threading is not really used for the code and that a compiler option -override-limits could fix the issue.

Is this something to worry about? Should I play around with the build program to see whether I can force this additional option to be passed on the the compiler?

Hello,
I don't think you should worry about that. Only the optimization level was reduced, and in the worst case the ovirt program will run slower. To avoid this you can try the -override-limits compiler option, but the best solution is to upgrade to the last Intel version (14.0.2).

Dear Mihaly,

The best solution wasn't an option (because of lack of budget), so I used the -override-limits. After running MRCC for a bit, it seems that my worry about ovirt not possibly using multiple threads because of the compiler limits was indeed not something to worry about. I have not seen ovirt at over 100% cpu usage, so I assume it wasn't multithreaded to begin with.