With new pass manager, dex2oat benchmark showed 1.61% performance
improvement though binary size saw an increase of 3.37%.
For Googlers, detailed benchmark results are in go/android-pgo-npm.
Test: m checkbuild
Bug: 118894695
Change-Id: I1687886acac7f61e67265a9c73997fb241ad31e6
Add an opaque OnceKey type and use it for all calls to Once in
build/soong. A future patch will convert the arguments to
Once* to OnceKey once users outside build/soong have been updated.
Test: onceper_test.go
Change-Id: Ifcb338e6e603e804e507203c9508d30ffb2df966
Bug: http://b/74395273
Update profile-search logic to look for profile files named
<profile_file>.<arbitrary-version> in the profileProject and use that if
available. This works around an issue where ccache serves stale cache
entries when the profile file has changed.
Test: touch toolchain/pgo-profiles/art/dex2oat.profdata.foo and check it
gets used.
Change-Id: I3de095c263b952cede25af7d0b63dc7280914d76
Such optimisations may significantly increase the binary size when
compiler heuristics are off. Disabling these helps cut down the
binary sizes with negligible decrease in performance, but allows us to
be more comfortable enabling LTO across various projects.
Test: m
Test: dex2oat, hwui, skia benchmark
Bug: 62839002
Change-Id: Id63e8dd295df2972f76ae4e29ee367080fff8429
This variable can be set in BoardConfig.mk to specify a list of
additional paths that contain PGO profiles. These directories are
searched after the predefined paths in soong/cc/pgo.go while finding
PGO profiles.
Test: Set this variable in a BoardConfig and verify that such profiles
are found and that these paths are searched after the predefined paths
in soong/cc/pgo.go.
Change-Id: I0bb9523de614d0f23aba8d51c887d8fc8f41c993
Bug: http://b/72642679
Store missing profile files and the modules that refer to them in the
SOONG_MODULES_MISSING_PGO_PROFILE_FILE variable passed to Make. The
contents of this variable will be written to
$DIST_DIR/pgo_profile_file_missing.txt as part of the 'dist' target.
Test: 'm dist' and verify creation of pgo_profile_file_missing.txt.
Change-Id: I237cd0398be418be2b7db6fa65ece5ef347ecbc1
Bug: http://b/63768402
If ANDROID_PGO_INSTRUMENT has "all" or "ALL", all PGO-enabled modules
are built for profile generation.
Test: Build with and without 'all' in ANDROID_PGO_INSTRUMENT
Change-Id: I3b1a9b562775e80a4ab3965100341d9e8e4ffde9
Bug: http://b/63768402
Profile files are searched in multiple directories in a pre-define list,
instead of just one.
PGO profile_file enforcement is also removed - profile_file dependency
and -fprofile-use are added iff the profile_file is present.
Test: Build https://android-review.googlesource.com/c/474805 with
.profdata files in vendor/google_data/pgo-profiles and
toolchain/pgo-profiles and verify expected behavior.
Change-Id: I2604713a8a7a682bd5c6bde569dc32335be5eca9
Merged-In: I2604713a8a7a682bd5c6bde569dc32335be5eca9
This (possibly arch-specific) property adds extra flags while building
for profiling. For example, dex2oat requires setting
'-Wno-frame-larger-than' when instrumentation is enabled.
Test: Build 'pgo' module with the new property and inspect build.ninja
Change-Id: Ia36422a400b0e0b87cbb33b1c8e565569475a56d
AConfig() now duplicates Config(). Replace the uses of AConfig()
with Config(). Leave AConfig() for now until code in other
projects is cleaned up.
Test: m checkbuild
Change-Id: Ic88be643049d21dba45dbd1a65588ed94bf43bdc
Bug: http://b/65598278
This property defaults to 'true' and setting it to false skips profile
use. This escape hatch lets us disable PGO for a module without
completely removing the 'pgo' property. Additionally, this also helps
selectively disabling PGO for some architectures, if desired.
Test: Test that -fprofile-use is not added for a test module if
'enable_profile_use: false' is set.
Change-Id: Ifcf1a48c194bc86efd88a529cc2d66a47b7ab080
Bug: http://b/65598278
Non-PGO builds (with this environment variable set) can be used to
measure the performance difference induced by PGO.
Test: Build PGO modules with ANDROID_PGO_PROFILE_USE set.
Change-Id: Ib23bad5208ac7f54894c7768d7532f53b6b91179
These methods only need the 'PgoProperties' struct. Avoid the extra
indirection by directly using this struct.
Test: Build modules with PGO property.
Change-Id: I1923ebde4b0d546810de8e696514d218b3a4f54b
Bug: http://b/65598278
The profile runtime depends on libgcc for some symbols (only under some
circumstances - armv5, ndk r14, static executables). Since Android
build passes -nostdlib and adds libgcc manually, the profile runtime
gets passed to the linker later than libgcc.
Instead, explicitly add the profile runtime to the linker command (and
pass one other flag added by the clang driver to the link).
Test: Build a library with profile instrumentation that otherwise fails
instrumented build.
Change-Id: I24b34cebd2c3bb6a540f8f4c465ace1be4eb90f3
Signed-off-by: Pirama Arumuga Nainar <pirama@google.com>
Bug: http://b/63768402
Wno-backend-plugin warnings are generated by IR-based PGO when sources
evolve and the profiles become stale. Disable these warnings when
profiles are passed to the compiler.
Test: Build a module with a PGO property when profiles are used.
Change-Id: I462bbf55aafd8770a90c2c23462bf71607ac9108
Bug: http://b/63768402
Bug: http://b/65598278
Add support for the 'pgo' property to specify how a module is processed
under PGO. A sample property is below:
pgo: {
instrumentation: true, // could be "sampling: true" when supported
profile_file: "pgo_simple.profdata",
benchmarks: ["pgo_simple"],
}
1. Runtime profiles can be gathered using "sampling" or
"instrumentation". Sampling is not supported initially.
2. If 'toolchain/pgo-profiles' project is found,
'toolchain/pgo-profiles/${profile_file}' is passed to the compiler and
linker when building this module.
3. If ANDROID_PGO_INSTRUMENT environment variable is set, and includes a
benchmark in the 'benchmarks' list, appropriate flags (for e.g.
-fprofile-generate for instrumentation) are passed to the compiler and
linker when building this module.
Test: Add example modules that specify the pgo property and verify
appropriate flags and dependencies in the Ninja file. Some
tests/examples are in https://android-review.googlesource.com/474805
Change-Id: I6242e0c904497a115e367dea6927ba1c4b906355
Yi Kong