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* commit 'c0221e7e7ef8e572d7e3ce4a1b66195b4f938f5b':
Allow to disable forced keep of annotated
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We force all classes annotated with runtime annotation to be kept
in the main dex list. This allow to workaround a Dalvik bug when
accessing the annotations. But this increase the pressure in the
main dex indexes. The new option is to allow to disable this
workaround for application facing the index limit in their main
dex and that don't access annotation at runtime or that have only
annotations not subject to the resolution bug.
Bug: 18928046
Change-Id: Ibcd7e579a7fef3451ec8aeb266ea67514d82cd50
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The current dx implementation supports options --multi-dex, for applications
not fitting within the dex format limitations; and --num-threads=N, triggers
concurrent processing of multiple input files. However, the implementation
has the following limitations:
The --num-threads option is disabled when used together with --multi-dex.
The --num-threads option implements concurrency at the level of classpath
entries, and does nothing when the classes to be translated are specified
with a single classpath element (e.g. single jar output from Proguard).
The existing --num-threads implementation may produce indeterministic output.
The heuristic used by the --multi-dex option to determine when to rotate the
dex output file is overly conservative.
The primary objective of this change is:
Concurrent translation of classes, independently of input specification format.
Support --num-threads=N in both mono- and multi-dex mode.
Deterministic class output order.
Near optimal use of dex file format capacity.
This is accomplished by reorganizing the dx workflow in a pipeline of
concurrent phases.
read-class | parse-class | translate-class | add-to-dex | convert-dex-to-byte[];
output-dex-files-or-jar
To manage dex file rotation (i.e. --multi-dex support), the parse-class and
add-to-dex phases are synchronized to prevent forwarding classes to the
translate-class phase if it could potentially result in breaking the dex
format limitations. The heuristic currently used to estimate the number of
indices needed for a class is improved, to minimize the amount of serialization
imposed by this feedback mechanism, and to improve the use of dex file capacity.
The translate-class and convert-dex-to-byte[] phases are further parallelized
with configurable (--num-threads=N option) thread pools. This allow translating
classes concurrently, while also performing output conversion in parallel.
Separate collector threads are used to collect results from the thread pools
in deterministic order.
Testing was performed on an Ubuntu system, with 6 cores and 12 hardware threads.
The taskset command was used to experimentally establish that running with more
than 8 hardware threads does not provide any additional benefit.
Experiments shows that the argument to --num-threads should not exceed the
lesser of the number of available hardware threads, and 5. Setting it to a
higher value results in no additional benefit.
The gain is generally larger for larger applications, and not significant for
small applications with less than a few thousands classes. Experiments with
generated classes shows that for large applications gains as high as 50% may
be possible.
For an existing real-life application with more than 11k classes, and requiring
2 dex files, a speed-up of 37% was achieved (--num-threads=5, 8 hardware
threads, 4g Java heap). A speedup of 31% was observed for another application
with ~7 classes.
For small applications, use of --num-threads=N>1 doesn’t provide significant
benefit. Running with --num-threads=1, the modified dx is slightly faster,
but no significant gain is observed unless the application requires multiple
dex files.
The one case where a significant regression may be observed is when using
--num-threads=N>1, with a single hardware thread. This is an inappropriate
configuration, even with the current implementation. However, because of
the limitations of the current implementation, such configurations may exist.
For instance, a configuration using both --multi-dex and --num-threads=5 will
currently generate a warning about using the two options together. With the
new implementation, the options can legitimately be used together, and could
result in an ~20% regression running on a single hardware thread.
Note: the current dx implementation, without --num-threads option, is already
approximately 50% slower with 1 hardware thread, compared to running with 2
or more. With 2 hardware threads the implementations are practically at par
(a little better, or a little worse, depending on the application).
Testing:
Tested with 6 existing applications ranging in size from 1K - 12K classes.
Updated and tested with relevant existing unit tests (one test changed to
account for better dex rotation heuristic).
Added unit test to test deterministic output.
Added unit performance test. By default run script merely validates that
--multi-dex and --num-threads can be used together (fast). However, the test
is configurable to perform performance test, over sets of generated classes.
Change-Id: Ic2d11c422396e97171c2e6ceae9477113e261b8e
Signed-off-by: Peter Jensen <jensenp@google.com>
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between runs"
* commit '3c5453aa09cf13e64750da6c0f0a499e0497002e':
Do not keep the DexFile field in Main between runs
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* commit 'e2808cf44a08f7e39163f79c9483c17602f58266':
Do not keep the DexFile field in Main between runs
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Bug: 18486731
Change-Id: I76dbdd709182c4663f2bbf42179f55d0184e97c2
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* commit 'ec36df1895d5b2b4a830c03ba49312640322cb99':
Keep annotated classes in main dex list
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* commit 'acc22d6b761340ef99bd4be7b8db2bab868b3a88':
Keep annotated classes in main dex list
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* commit '8e88bab04f03edbbc74fb61b31a847c22106bfab':
Keep annotated classes in main dex list
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Only classes annotated with a runtime visible annotation are to be kept.
See https://code.google.com/p/android/issues/detail?id=78144
Bug: 18385117
(cherry picked from commit 893795fc95fdd77d398ebb77a0fe336c45b596cf)
Change-Id: I46ceef4aab5119ba4515a07e8f17577e15931dbd
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* commit 'accd504f2f973b15f76885b218d93392f8e086bb':
Keep annotated classes in main dex list
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* commit 'c95485186a5075e7568198c47e7290980353ce1c':
Keep annotated classes in main dex list
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Only classes annotated with a runtime visible annotation are to be kept.
See https://code.google.com/p/android/issues/detail?id=78144
Bug: 18385117
Change-Id: Id377b3945b22201ebad05e7cd026af57acc60292
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* commit '37f5e351cee7aaf9162a1e9074af4b61079213cf':
Offer to exclude Zygote when converting heaps.
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* commit '3db80b5708eeae9194ff5dc44005efc8b2a726f1':
Offer to exclude Zygote when converting heaps.
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Dumps from Android devices have multiple heaps, including Zygote,
image, etc. When investigating RAM usage, it's most useful to focus
on "real" allocations from the app, ignoring the other heaps.
This change introduces the "-z" flag which will drop allocations
on non-app heaps during conversion.
Bug: 18473132
Change-Id: Ib1d5256b7bc4cfd7791f00c18a1cff920e0e3f46
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* commit '2d2391277d4a332c30cd1e89bae62df262041a11':
Use gnu++11 instead of c++11.
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* commit '3ef10cde0867d5ee8f95931e4ecddb180f2d6829':
Use gnu++11 instead of c++11.
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libdex depends on safe-iop, which needs typeof, which is a GNU
extension.
Bug: 18466763
Change-Id: I11ff261991252feab49505c25249c43accfee4ab
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* commit 'c012db68824ac2b6e13c209f432b514287335f10':
Keep --input-list order.
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* commit 'ec199fc9e406cc4ec7348b157d49b96d6897944b':
Keep --input-list order.
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* commit '0bc4145cf1ef206c3ede4d212f9b510421bf7544':
Clean up some dead dalvik cruft.
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* commit '69e211844100e760646170c444f44f1064a48a77':
Clean up some dead dalvik cruft.
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I don't know whether dmtracedump is still useful, so I'm assuming we should
keep it building. But at least now it's more obvious that it's the only user
of Profile.h.
Change-Id: Ieabce07cb278a19af72b566b08193db17d95e66d
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* commit '4191557ea3af887621cf6ad693a403fc78b72dd1':
Keep --input-list order.
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* commit '9747950064e4711c15baf0986102320a2512097a':
Keep --input-list order.
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Merging dex files starting with smaller ones can have
a big impact on performance as it potentially reduces
the number of compact events during the merge.
Gradle will now send the list sorted in ascending order
of file size, and dex should keep this order when parsing
the input list file.
Change-Id: Iff3ae4d30106fe70dca0764b33addfecceb84d09
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Merging dex files starting with smaller ones can have
a big impact on performance as it potentially reduces
the number of compact events during the merge.
Gradle will now send the list sorted in ascending order
of file size, and dex should keep this order when parsing
the input list file.
Change-Id: Iff3ae4d30106fe70dca0764b33addfecceb84d09
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* commit 'd1be1db405c77d9aa0813639f79d622ac6c17d28':
kill HAVE_POSIX_FILEMAP
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* commit '9013f53c778d11e7ba7a8bf745882a3e29fe938d':
kill HAVE_POSIX_FILEMAP
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Bug: 18315579
Change-Id: I2077b76ca7273fcaeaa91dda8d5365dd0e6f13e4
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disabling warnings"
* commit '455584f258133e8c16288a4e5d597368ecf1dc81':
Command line option for disabling warnings
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* commit 'b929a2792bb5d3e661ec6925b20aa6e5512b7b34':
Command line option for disabling warnings
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* commit 'a1e4327e248e14a5358c644c63342916f7ab4ae5':
Command line option for disabling warnings
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This commit adds a new command line option to dx:
--no-warning.
If the caller appends this to the arguments, dx won't print
warnings to System.err. This can be useful if the user
dexes external jars with old class format, so dx would
print lot of warning about those.
Bug: https://code.google.com/p/android/issues/detail?id=78285
Change-Id: Ic2da274ec72e096bcf871c1f4512c54ddc228721
Signed-off-by: Csaba Kozák <kozakcsabi@gmail.com>
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* commit 'ce498c6d18f8f31c76b4853a3ab0be41bddccb88':
Add +x on mainDexClasses.
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* commit '315b53e9eb8c92978e3b156caf0031ab3e77c9bf':
Add +x on mainDexClasses.
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Change-Id: Iaea2a8ec163cdfc50a5647e4071735675eee3481
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* commit '20f7a88c4c2b4917328d7ac3972da00f645ba906':
Fix dexlist build
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* commit '0bfe5322bdb29a3d4bb520073893dffa16dd17b3':
Fix dexlist build
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Change-Id: If2ecee1254e8a8fa3eb22f27f8a850bb827f4b37
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