search

intel / intel-cmt-cat

User space software for Intel(R) Resource Director Technology
http://www.intel.com/content/www/us/en/architecture-and-technology/resource-director-technology.html
Other
685 stars 180 forks source link

The pqos tool fails on systems with 300 or more CPU cores #261

Closed babumoger closed 1 month ago

babumoger commented 5 months ago

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.

rkanagar commented 1 month ago

Fixed in v24.05 https://github.com/intel/intel-cmt-cat/releases/tag/v24.05