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<div>Use srun <srun options> numactl -m 1 ./app OR srun <srun options> numactl -p 1 ./app </div>
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<div>See bottom of <a href="https://www.nersc.gov/users/computational-systems/cori/configuration/knl-processor-modes/">https://www.nersc.gov/users/computational-systems/cori/configuration/knl-processor-modes/</a><br>
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<div dir="ltr">--Junchao Zhang</div>
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<div dir="ltr" class="gmail_attr">On Wed, Feb 27, 2019 at 4:16 PM Sajid Ali via petsc-users <<a href="mailto:petsc-users@mcs.anl.gov">petsc-users@mcs.anl.gov</a>> wrote:<br>
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<div>Hi, <br>
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I ran a TS integrator for 25 steps on a Broadwell-Xeon and Xeon-Phi (KNL). The problem size is 5000x5000 and I'm using scalar=complex.
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The program takes 125 seconds to run on Xeon and 451 seconds on KNL ! <br>
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The first thing I want to change is to convert the memory access for the program on KNL from DRAM to MCDRAM. I did run the problem in an interactive SLURM job and specified -C quad,flat and yet I see DRAM is being used.
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I'm attaching the PETSc log files and Intel APS reports as well. Any help on how I should change my runtime parameters on KNL will be highly appreciated. Thanks in advance.
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<div style="font-size:12.8px">Sajid Ali<br>
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<div style="font-size:12.8px">Applied Physics<br>
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<div style="font-size:12.8px">Northwestern University</div>
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