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Dear MKL experts,

I've met an issue on matrix multiplication DGEMM routine that if the matrix cotnains huge values, i.e. 1.0d+17, the performance dropped significantly as low as 1/3 of regular scenario.

Any idea if this is possible and/or what the reason could be? I really don't expect such behavior. BTW, this is encountered only in Windows but not in Linux.

thanks,

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Hi, thanks for the issue.
Is that 32 or 64 bit systems?

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It would also be interesting to know if there are any +/-Infs in your output.

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Can you give us the example of this case to check the problem on our side?

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can you let me know where you put /Qftz? compiler option or linker option. details are appreciated.

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Thanks, TimP. This really helps understanding. thank you all.

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