You have a system configured with hugepages and you want to find per-process hugepages utilization.
# grep -i huge /proc/meminfo HugePages_Total: 2176 HugePages_Free: 2065 HugePages_Rsvd: 2065 Hugepagesize: 2048 kB
Method 1
The following command can be used to see which processes are using THP:
for i in /proc/*/smaps; do
if [[ $(grep '^AnonHugePages' $i | grep -v '0 kB$') ]]; then
echo -ne "$i procees maybe running THP mode if you are using THP mode in kernel:\n";
fi;
done
Evaluating AnonHugePages here will show if Transparent Huge Pages (THP) are used.
Method 2 – hugepages used by a process
The following command can be used to calculate the size of hugepage used by a specified process, assumption that HugePage size is 2048 kB, the output unit is MiB:
# grep -B 11 'KernelPageSize: 2048 kB' /proc/[PID]/smaps | grep "^Size:" | awk 'BEGIN{sum=0}{sum+=$2}END{print sum/1024}'
Note: avoid double counting of the same address in /proc/[PID]/smaps.
