View hugepages information about the current system.

hugepages.sh

#!/bin/bash
#
# Get the number of hugepages currently configured on the system.
#
# Sample output:
#   Hugepages:
#   Total: 0 (0)
#   Free: 0 (0)
#   Surplus: 0 (0)
#
# Get the number of NUMA nodes on the current host.
NUMA_NODES=$(ls --directory /sys/devices/system/node/node* | wc --lines)

# Get hugepages information for each NUMA node on the system.
for NUMA_NODE in $(seq 0 $(($NUMA_NODES - 1))); do
  TOTAL_HUGEPAGES=$(cat /sys/devices/system/node/node$NUMA_NODE/hugepages/hugepages-1048576kB/nr_hugepages)
  FREE_HUGEPAGES=$(cat /sys/devices/system/node/node$NUMA_NODE/hugepages/hugepages-1048576kB/free_hugepages)
  SURPLUS_HUGEPAGES=$(cat /sys/devices/system/node/node$NUMA_NODE/hugepages/hugepages-1048576kB/surplus_hugepages)
  echo "Hugepages:"
  echo -e "\tTotal: $TOTAL_HUGEPAGES ($NUMA_NODE)"
  echo -e "\tFree: $FREE_HUGEPAGES ($NUMA_NODE)"
  echo -e "\tSurplus: $SURPLUS_HUGEPAGES ($NUMA_NODE)"
done