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cachingvirtualvirtual-memorypage-tables
robinhood91
robinhood91

Reputation: 1691

Calculate number of virtual pages per process

I have 64 KB of pages, 4GB physical memory, and a 64-bit machine.

I learnt that 64-bit machines result in 256TB of virtual memory. If I had to calculate the # of virtual pages per process, would that simply be:

Total virtual memory/ Page size = 256TB/64KB = 4x10^9 pages? I have read documentation online but I am not fully wrapping it.

Upvotes: 1

Views: 3976

Answers (1)

user3344003
user3344003

Reputation: 21627

All that means is that each process could theoretically have a logical address space of 2^64 bytes. Thus each process could theoretically have:

2^64/2^16 = 2^48 pages

In reality, it is effectively impossible for a process to have the maximum possible number of pages.

The number of pages is restricted by:

  1. The division of the address space by mode.

  2. Page file size

  3. System parameters

  4. process quotas

Upvotes: 2

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