The pqos tool fails on systems with 300 or more CPU cores

[babumoger]

The pqos tool fails with the following errors on systems with 300 or more
CPU cores.
$pqos
NOTE: Mixed use of MSR and kernel interfaces to manage
CAT or CMT & MBM may lead to unexpected behavior.
ERROR: Could not open /sys/fs/resctrl directory
ERROR: Failed to stop resctrl events
ERROR: Failed to start all selected OS monitoring events
Monitoring start error on core(s) 339, status 1

By default, the file descriptor limit is set to 1024 for a session. pqos
monitor uses 3 descriptors for each CPU for perf monitoring. So, it runs
out of limit(1024) on systems with 300 or more CPUs.