[LU-7801] Function level debug message filter

• Type: Improvement
• Resolution: Won't Fix
• Priority: Minor
• Labels: patch
• Assignee: Peter Jones
• Reporter: Gu Zheng (Inactive)

Description

Debug messages are important to profiling, bug addressing and tuning, but tons of messages will be printed if we enabled debug on a running production system, especially heavy workload.
Though we have subsystem level message filter, and it is very useful if we just need to focus on specific subsystems, but the granularity is still too big if we want to only focus on some function, and the efficient messages are submerged in the messages ocean, though we can dump all the messages out and filter it in the user-space again and again.
If we have a native function level messages which make decision(print message or not) at the early print step, that means just print the message of specified functions, then we can make the debug messages only focus on what we want and ignore the uncorrelated ones. It will be very useful in the condition that we only want messages of specified functions.

Issue Links

• is related to: LU-8980 Add tracepoint support to Lustre