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#1 |
New Member
Join Date: Aug 2020
Posts: 2
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I am using fluent to simulate and analyse a flow past a cylinder. My computer has 8 cores and 16 logical processors. When open fluent, I always run in parallel with 8 solver processes. However, the simulation run very slow and I don't get the speed I am expecting. The task manager always shows that 5-6% of the CPU consumed by cx2010 while each of the 7 fl_mpi2010 consume 6-7% of the CPU. I have another 2 cores laptop which shows that 25% is consumed by the cx2010 while only 2 fl_mpi2010 files consume 10% each. Whats going wrong here and how can I increase the speed of my runs?
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#2 |
Senior Member
Join Date: Nov 2015
Posts: 246
Rep Power: 11 ![]() |
Turn off Hyper-threading and use only real cores. Fluent like many other CFD codes don't like Hyper-threading.
UPD BTW 100/16 = 6.25 % - Task manager shows percent of total CPU load. One full loaded core is 6.3% of whole CPU. If you check the total load you see 55% value which corresponds to 8 of 16 cores fluent plus some load for Windows. Last edited by karachun; August 7, 2020 at 17:41. |
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#3 |
New Member
Join Date: Aug 2020
Posts: 2
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Thanks karachun,
How can I turn off hyper-threading? |
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#4 |
Senior Member
Join Date: Nov 2015
Posts: 246
Rep Power: 11 ![]() |
From BIOS, check your motherboard documentation.
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Tags |
cfd, fleunt, speed |
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