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The Go programming language
a1695d2ea3
Implement custom assembly thunks for hot race calls (memory accesses and function entry/exit). The thunks extract caller pc, verify that the address is in heap or global and switch to g0 stack. Before: ok regexp 3.692s ok compress/bzip2 9.461s ok encoding/json 6.380s After: ok regexp 2.229s (-40%) ok compress/bzip2 4.703s (-50%) ok encoding/json 3.629s (-43%) For comparison, normal non-race build: ok regexp 0.348s ok compress/bzip2 0.304s ok encoding/json 0.661s Race build: ok regexp 2.229s (+540%) ok compress/bzip2 4.703s (+1447%) ok encoding/json 3.629s (+449%) Also removes some race-related special cases from cgocall and scheduler. In long-term it will allow to remove cyclic runtime/race dependency on cmd/cgo. Fixes #4249. Fixes #7460. Update #6508 Update #6688 R=iant, rsc, bradfitz CC=golang-codereviews https://golang.org/cl/55100044 |
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--
Binary Distribution Notes
If you have just untarred a binary Go distribution, you need to set
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variable if you unpack it into /usr/local/go, or if you rebuild
from sources by running all.bash (see doc/install.html).
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For example, if you extracted the tar file into $HOME/go, you might
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export GOROOT=$HOME/go
export PATH=$PATH:$GOROOT/bin
See doc/install.html for more details.