On Sat, 3 Jun 2017 21:46:09 -0500 Tim Peters <tim.pet...@gmail.com> wrote: > > A virtual address space span of a terabyte could hold 1M pools, so > would "only" need a 1M/8 = 128KB bit vector. That's minor compared to > a terabyte (one bit per megabyte).
The virtual address space currently supported by x86-64 is 48 bits wide (spanning an address space of 2**48 bytes, that is 256 TB), so you would need a 2**(48-20) bits vector, i.e. 256 Mbits or 32 MB. Note Intel has plans to extend the virtual address space to 2**57 bytes: https://www.phoronix.com/scan.php?page=news_item&px=Intel-5-Level-Paging > The system calls can't be relied on to > return arena-aligned _or_ pool-aligned addresses. Unless using mmap() for pools with a size equal to or an exact divisor of the system's page size, that is ;-) Regards Antoine. _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com