Improving Performance of Your Cluster
To improve cluster performance, follow these steps, provided all required software is installed on each node:
- Reboot all nodes.
- Ensure all nodes are in identical conditions and no zombie processes are left running from prior HPL runs. To do this, run single-node Stream and Intel® Distribution for LINPACK Benchmark on every node. Ensure results are within 10% of each other (problem size must be large enough depending on memory size and CPU speed). Investigate nodes with low performance for hardware/software problems.
- Check that your cluster interconnects are working. Run a test over the complete cluster using an MPI test for bandwidth and latency, such as one found in the Intel® MPI Benchmarks package.
- Run an Intel® Distribution for LINPACK Benchmark on pairs of two or four nodes and ensure results are within 10% of each other. The problem size must be large enough depending on the memory size and CPU speed.
- Run a small problem size over the complete cluster to ensure correctness.
- Increase the problem size and run the real test load.
- In case of problems go back to step 2.
Before making a heterogeneous run, always run its homogeneous equivalent first.
Product and Performance Information
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Performance varies by use, configuration and other factors. Learn more at
www.Intel.com/PerformanceIndex.
Notice revision #20201201
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