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fuchsia / third_party / blueprint / 5bdb4ca1a5215ee5b1276865fcc7cf068ca0ced8
commit5bdb4ca1a5215ee5b1276865fcc7cf068ca0ced8[log] [tgz]
authorColin Cross <ccross@android.com>Tue Apr 14 17:22:19 2015 -0700
committerColin Cross <ccross@android.com>Wed Apr 15 11:03:17 2015 -0700
tree64133a2c567e272c113e965c9f7f3bae89ee7be6
parent8c1c6c03f8ad3e1267c047b83d6e7262de989c73 [diff]
Set GOMAXPROCS to number of CPUs

Apparently Go only allows a single thread to be executing by default,
so the increase in performance seen when concurrency was added to
Blueprint was entirely due to scheduling goroutines while the
executing goroutine was blocked in a syscall.  Whoops.

Set GOMAXPROCS to the number of CPUs.  Reduces wall thime by >2x on
one workload.

Change-Id: Ib5fc7761c09a076fc5a1b7f08f5ccf034304477c
1 file changed
tree: 64133a2c567e272c113e965c9f7f3bae89ee7be6
  1. bootstrap/
  2. bpfmt/
  3. bpmodify/
  4. deptools/
  5. parser/
  6. pathtools/
  7. proptools/
  8. .travis.yml
  9. Blueprints
  10. bootstrap.bash
  11. build.ninja.in
  12. context.go
  13. context_test.go
  14. CONTRIBUTING.md
  15. doc.go
  16. LICENSE
  17. live_tracker.go
  18. mangle.go
  19. module_ctx.go
  20. ninja_defs.go
  21. ninja_strings.go
  22. ninja_strings_test.go
  23. ninja_writer.go
  24. ninja_writer_test.go
  25. package_ctx.go
  26. README.md
  27. scope.go
  28. singleton_ctx.go
  29. splice_modules_test.go
  30. unpack.go
  31. unpack_test.go
README.md

Blueprint Build System

Build Status

Blueprint is a meta-build system that reads in Blueprints files that describe modules that need to be built, and produces a Ninja manifest describing the commands that need to be run and their dependencies. Where most build systems use built-in rules or a domain-specific language to describe the logic for converting module descriptions to build rules, Blueprint delegates this to per-project build logic written in Go. For large, heterogenous projects this allows the inherent complexity of the build logic to be maintained in a high-level language, while still allowing simple changes to individual modules by modifying easy to understand Blueprints files.