diff options
| author | Ian Lance Taylor <ian@gcc.gnu.org> | 2019-05-31 17:56:36 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2019-05-31 17:56:36 +0000 |
| commit | 4d12cf3cc3143843225ecdb0e5048fc7c37b1574 (patch) | |
| tree | 30d27f1ac980671a5b890c86e562a746f4f4b54e /gcc/go/gofrontend/expressions.cc | |
| parent | 34a13a521e3fc6f46fcaf2f158d20e66874e99fd (diff) | |
| download | gcc-4d12cf3cc3143843225ecdb0e5048fc7c37b1574.zip gcc-4d12cf3cc3143843225ecdb0e5048fc7c37b1574.tar.gz gcc-4d12cf3cc3143843225ecdb0e5048fc7c37b1574.tar.bz2 | |
runtime: implement cheaper context switch on Linux/AMD64
Currently, goroutine switches are implemented with libc
getcontext/setcontext functions, which saves/restores the machine
register states and also the signal context. This does more than
what we need, and performs an expensive syscall.
This CL implements a simplified version of getcontext/setcontext,
in assembly, that only saves/restores the necessary part, i.e.
the callee-save registers, and the PC, SP. A simplified version
of makecontext, written in C, is also added. Currently this is
only implemented on Linux/AMD64.
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/178298
From-SVN: r271818
Diffstat (limited to 'gcc/go/gofrontend/expressions.cc')
0 files changed, 0 insertions, 0 deletions