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Userland Allocators: dlmalloc, ptmalloc, jemalloc, tcmalloc

This generated surface maps a learner-facing curriculum unit to its canonical source routes.

Curriculum surface​

  • Open learner-facing unit
  • Curriculum path: content/curriculum/systems/semester-05-os-networking/module-02-memory-management-virtual-memory/concepts/cluster-04-allocators-and-fragmentation/11-userland-allocators-dlmalloc-ptmalloc-jemalloc-tcmalloc-primary.md
  • App: systems
  • Semester: semester-05-os-networking
  • Module: module-02-memory-management-virtual-memory
  • Unit kind: concept
  • Curation level: module_curated

Learning objectives​

  • Explain Userland Allocators: dlmalloc, ptmalloc, jemalloc, tcmalloc in terms of translation, protection, and performance costs instead of memorizing isolated terms.
  • Reason from the abstraction down to concrete events such as TLB misses, page faults, fragmentation, or allocation behavior.
  • Use operating-system-concepts, ostep to support diagrams, experiments, and debugging when the mental model is still unstable.

Prerequisites​

  • Comfort with the process abstraction and address-space basics from module 01.

Source books​

  • operating-system-concepts
  • ostep

Source routes​

Operating System Concepts​

Ostep​

Supporting curriculum routes​

No supporting curriculum routes linked yet.

External enrichment​

  • Linux Kernel Documentation: Memory Management (official_docs_companion) - Useful for connecting the learner model of virtual memory to real kernel memory-management subsystems.
  • man 2 mmap (read_if_stuck) - Good when the learner needs one concrete API to connect virtual-memory ideas to real process behavior.

AI companion modes​

  • Explain simply
  • Socratic tutor
  • Quiz me
  • Diagnose my confusion
  • Generate extra practice

Source-of-truth note​

This teaching unit is learner-facing guidance assembled from multiple canonical book routes. Use the listed source books as the primary conceptual spine for Userland Allocators: dlmalloc, ptmalloc, jemalloc, tcmalloc, and treat outside material as supporting enrichment only.