Seg fault with Intel's MKL and parallel MPB

[amrit-poudel]

Intel's MKL library and parallel MPB do not seem to get along very well. I get segmentation fault during make check.

Outputting check-epsilon...
solve_kpoint (0,0,0):
tefreqs:, k index, k1, k2, k3, kmag/2pi, te band 1, te band 2, te band 3, te band 4, te band 5, te band 6, te band 7, te band 8
Solving for bands 2 to 8...
[node253:27731] *** Process received signal ***
[node253:27731] Signal: Segmentation fault (11)
[node253:27731] Signal code: Invalid permissions (2)
[node253:27731] Failing at address: 0x2331420
[node253:27731] [ 0] /lib64/libpthread.so.0() [0x336060f710]
[node253:27731] [ 1] [0x2331420]
[node253:27731] *** End of error message ***

However, the serial version of MPB seems to work fine with Intel's MKL.

The parallel MPB and OPENBLAS also work well.

I was just wondering why parallel MPB won't work with MKL. If this is related to fftw3 issue (an earlier issue, which is now closed), I am not sure why serial version works just fine with MKL.

I am currently using gcc 4.8.5, Intel 2015 MKL, and mpb 1.5

[stevengj]

That's probably because MKL exports FFTW-like bindings for its FFTs, whereas MPB needs the real FFTW library. Linking both MKL and FFTW probably causes the linker to get confused.