[BUG] Run raft-ann-bench with faiss_cpu_flat algo on Xeon cpu will fail

[ftian1]

Describe the bug
it will raise below error on Xeon CPU.

Error occurred running benchmark: Command '['/home/ubuntu/wwq/miniconda3/envs/neuralchat_rag/bin/ann/FAISS_CPU_FLAT_ANN_BENCH', '--build', '--data_prefix=./', '--benchmark_out_format=json', '--benchmark_counters_tabular=true', '--benchmark_out=./wiki_all_88M/result/build/faiss_cpu_flat,base.json.lock', '--raft_log_level=3', 'wiki_all_88M_faiss_cpu_flat,base,k10,bs10000_afc3d9c8-d53d-11ee-af72-0a7d5625b4dd.json']' died with <Signals.SIGKILL: 9>.

Steps/Code to reproduce bug

python -m raft-ann-bench.run --dataset wiki_all_88M --dataset-path ./ --algorithms faiss_cpu_flat --build

Expected behavior
run benchmark succeed

Environment details (please complete the following information):
Bare-metal installation on Ubuntu
Raft was installed by conda install -c rapidsai -c conda-forge raft-ann-bench-cpu