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| 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 | |
| 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')
| -rw-r--r-- | gcc/go/gofrontend/MERGE | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE index b7b0f50..7226822 100644 --- a/gcc/go/gofrontend/MERGE +++ b/gcc/go/gofrontend/MERGE @@ -1,4 +1,4 @@ -4dc60d989293d070702024e7dea52b9849f74775 +8402f6ac021ba20163ab4fcdb10ab7bb642de6dc The first line of this file holds the git revision number of the last merge done from the gofrontend repository. |