Memory issue in superconductivity calculations with EPW v5.3

Post here questions linked with issue while running the EPW code

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hlee
Posts: 415
Joined: Thu Aug 03, 2017 12:24 pm
Affiliation: The University of Texas at Austin

Memory issue in superconductivity calculations with EPW v5.3

Post by hlee »

Dear all:

For future reference, I reposted below the question from Miao Gao (AgentZero) and its answer from Hari Paudyal (hpaudya1).

Sincerely,

H. Lee

[Question from Miao Gao (AgentZero)]
Dear Dr. Lee,

I download the develop version on 12th September. But I found that there is a minor bug in this developed version when solving the anisotropic Eliashberg equations. The memory required by the program gradually increases with the aggrandizement of the temperature. Finally, epw crashes due to insufficient memory. Some outputs are as follows. As we see, the memory required per pool is 0.48 GB, 1.41 GB, and 6.96 GB for 44 K, 45 K, and 51 K, respectively. Could you please tell me how to fix this bug?

Best wishes,
Miao Gao
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temp( 1) = 44.00000 K

Solve anisotropic Eliashberg equations on imaginary-axis

Total number of frequency points nsiw( 1) = 63
Cutoff frequency wscut = 1.5128


Size of allocated memory per pool: ~= 0.4826 Gb

...
temp( 2) = 45.00000 K

Solve anisotropic Eliashberg equations on imaginary-axis

Total number of frequency points nsiw( 2) = 62
Cutoff frequency wscut = 1.5228


Size of allocated memory per pool: ~= 1.4100 Gb
...

temp( 8) = 51.00000 K

Solve anisotropic Eliashberg equations on imaginary-axis

Total number of frequency points nsiw( 8) = 54
Cutoff frequency wscut = 1.5049


Size of allocated memory per pool: ~= 6.6926 Gb

Size of allocated memory per pool: ~= 6.7094 Gb

Size of allocated memory per pool: ~= 6.9647 Gb
[Answer from Hari Paudyal (hpaudya1)]
Hi Miao,

Yes, you are right. There was a problem in memory release while solving anisotropic Eliashberg equations in the dev. versions from 8th Sep to 30th Sep, and unfortunately you used in 12th Sep. After this, we have fixed the issue. Please consider using the latest version.

Happy EPWing,
Hari Paudyal

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