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Perf boost [WIP] #36

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@mchandra mchandra commented Oct 9, 2017

Transfer from af<->np<->petsc without reordering

Initial testing:

$ AF_OPENCL_DEFAULT_DEVICE_TYPE=CPU python test_af_np_petsc_data_transfer.py 
ArrayFire v3.6.0 (OpenCL, 64-bit Linux, build d9bc8d7)
-0- NVIDIA: Quadro M1000M, 2047 MB
[1] INTEL: Intel(R) Xeon(R) CPU E3-1505M v5 @ 2.80GHz, 31993 MB
---------------------
N_q1 + 2*N_ghost = 70
N_q2 + 2*N_ghost = 134
dof              = 4096
---------------------

af_array_old.shape =  (70, 134, 4096)
af_array_new.shape =  (4096, 70, 134)
 
comm_old =  2.8967 secs/iter
comm_new =  0.8536 secs/iter

shyams2 and others added 7 commits September 22, 2017 11:08
WIP Poisson solver debugging
c6f751d
1) Added option to get ksp to read command line arguments. Needed to …
e3ada3f 
…add additional

headers in test files for petsc to read command line arguments.
2) test_compute_electrostatic_fields.py is in flux

Run with : python test_compute_electrostatic_fields.py -ksp_monitor
* Using SNES to solve Poisson equation
3a7d353 
* First attempt: managed to solve x^2 - 2 = 0 over [63, 63] grid using SNES
Got residual assembly for f(x) = x^2 - 2. over [N_q1, N_q2] working w…
e18df04 
…ith both

numpy and arrarfire arrays
Poisson solver now works with SNES.
1a2961e 
  * Periodic BCs work once background density has been subtracted correctly
First iteration of 3D poisson solver + 2D charge density. Code in tests/
d84a745
Added perf test for comm to compare old and new ordering
dababd8
@mchandra mchandra changed the title Perf boost Perf boost [WIP] Oct 9, 2017
@shyams2
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shyams2 commented Oct 10, 2017

Results when run on savio:

ArrayFire v3.6.0 (OpenCL, 64-bit Linux, build 4a60571)
[0] NVIDIA: Tesla K80, 11439 MB
-1- INTEL: Intel(R) Xeon(R) CPU E5-2623 v3 @ 3.00GHz, 64449 MB
-2- AMD: Intel(R) Xeon(R) CPU E5-2623 v3 @ 3.00GHz, 64449 MB
---------------------
N_q1 + 2*N_ghost = 70
N_q2 + 2*N_ghost = 134
dof              = 4096
---------------------

af_array_old.shape =  (70, 134, 4096)
af_array_new.shape =  (4096, 70, 134)
 
comm_old =  0.7544 secs/iter
comm_new =  0.2407 secs/iter

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@mchandra @shyams2