Problem

Registry.populateDSO in dso/map.go holds an exclusive sync.Mutex for the entire function duration, including the expensive binaryParser.Parse(ctx, f) ELF parsing operation:

dso.bpfAllocationMutex.Lock()
defer dso.bpfAllocationMutex.Unlock()

// ... fast allocation check ...

analysis, err := d.binaryParser.Parse(ctx, f)  // slow — held under lock

This serialises all concurrent DSO loads on a single binary parse, which can be significant at agent startup when many processes are discovered simultaneously.

Proposed fix

1. Change sync.Mutex → sync.RWMutex
2. Fast path (check + MoveFromCache/Release) stays under exclusive lock — remains fast
3. binaryParser.Parse runs without any lock
4. Write lock re-acquired to store result, with double-check guard against concurrent population

Files affected

• perforator/agent/collector/pkg/dso/map.go