fix a missing python module issue

Signed-off-by: Tsai, Louie <louie.tsai@intel.com>

Author: louie-tsai

.buildkite/nightly-benchmarks/scripts/run-performance-benchmarks.sh

@@ -33,7 +33,8 @@ check_gpus() {
 
 check_cpus() {
   # check the number of CPUs and NUMA Node and GPU type.
-  declare -g numa_count=$(python3 -c  "from numa import info;numa_size = info.get_num_configured_nodes(); print(numa_size)")
+  last_numa_index=$(cat /sys/devices/system/node/online | cut -d'-' -f2)
+  declare -g numa_count=$((last_numa_index+1))
   if [[ $numa_count -gt 0 ]]; then
     echo "NUMA found."
     echo $numa_count