| commit | 5042317d6919d4c84557e04be35130430e8d1dd4 | [log] [tgz] |
|---|---|---|
| author | Clément Chigot <chigot.c@gmail.com> | Wed Nov 13 13:46:42 2019 +0100 |
| committer | Ian Lance Taylor <iant@golang.org> | Sat Nov 16 00:02:02 2019 +0000 |
| tree | dc59d2217baba82afd03c6bd1864e1d14337a56d | |
| parent | 72f333a14b071e7560c67abcaacec176aaa604cf [diff] |
runtime: add arenaBaseOffset on aix/ppc64 On AIX, addresses returned by mmap are between 0x0a00000000000000 and 0x0afffffffffffff. The previous solution to handle these large addresses was to increase the arena size up to 60 bits addresses, cf CL 138736. However, with the new page allocator, the 60bit heap addresses are causing huge memory allocations, especially by (s *pageAlloc).init. mmap and munmap syscalls dealing with these allocations are reducing performances of every Go programs. In order to avoid these allocations, arenaBaseOffset is set to 0x0a00000000000000 and heap addresses are on 48bit, as others operating systems. Updates: #35451 Change-Id: Ice916b8578f76703428ec12a82024147a7592bc0 Reviewed-on: https://go-review.googlesource.com/c/go/+/206841 Run-TryBot: Michael Knyszek <mknyszek@google.com> Reviewed-by: Michael Knyszek <mknyszek@google.com>
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