Memory Management


Implementation of Pure Segmentation



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Chapter03-Memory Management
Lab1 SE171918

Implementation of Pure Segmentation

  • Figure 3-33. (a)-(d) Development of checkerboarding. (e) Removal of the checkerboarding by compaction.
  • Tanenbaum & Bos, Modern Operating Systems: 4th ed., Global Edition (c) 2015 Pearson Education Limited. All rights reserved.

Segmentation with Paging: MULTICS (1)

  • Figure 3-34. The MULTICS virtual memory. (a) The descriptor segment pointed to the page tables.
  • Tanenbaum & Bos, Modern Operating Systems: 4th ed., Global Edition (c) 2015 Pearson Education Limited. All rights reserved.

Segmentation with Paging: MULTICS (2)

  • Figure 3-34. The MULTICS virtual memory. (b) A segment descriptor. The numbers are the field lengths.
  • Tanenbaum & Bos, Modern Operating Systems: 4th ed., Global Edition (c) 2015 Pearson Education Limited. All rights reserved.

Segmentation with Paging: MULTICS (3)

  • Figure 3-35. A 34-bit MULTICS virtual address.
  • Tanenbaum & Bos, Modern Operating Systems: 4th ed., Global Edition (c) 2015 Pearson Education Limited. All rights reserved.

Segmentation with Paging: MULTICS (4)

  • Figure 3-36. Conversion of a two-part MULTICS address into a main memory address.
  • Tanenbaum & Bos, Modern Operating Systems: 4th ed., Global Edition (c) 2015 Pearson Education Limited. All rights reserved.

Segmentation with Paging: MULTICS (5)

  • Figure 3-37. A simplified version of the MULTICS TLB. The existence of two page sizes made the actual TLB more complicated.
  • Tanenbaum & Bos, Modern Operating Systems: 4th ed., Global Edition (c) 2015 Pearson Education Limited. All rights reserved.

Segmentation with Paging: The Intel x86 (1)

  • Figure 3-38. An x86 selector.
  • Tanenbaum & Bos, Modern Operating Systems: 4th ed., Global Edition (c) 2015 Pearson Education Limited. All rights reserved.

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