Commit Graph

897 Commits

Author SHA1 Message Date
Nick Hill
0ac8db0307 CompositeByteBuf tidy-up (#8784)
Motivation

There's some miscellaneous cleanup/simplification of CompositeByteBuf
which would help make the code a bit clearer.

Modifications

- Simplify web of constructors and addComponents methods, reducing
duplication of logic
- Rename `Component.freeIfNecessary()` method to just `free()`, which is
less confusing (see #8641)
- Make loop in addComponents0(...) method more verbose/readable (see
https://github.com/netty/netty/pull/8437#discussion_r232124414)
- Simplify addition/subtraction in setBytes(...) methods

Result

Smaller/clearer code
2019-02-01 10:32:02 +01:00
田欧
d7648f1d93 use checkPositive/checkPositiveOrZero (#8803)
Motivation:

We have a utility method to check for > 0 and >0 arguments. We should use it.

Modification:

use checkPositive/checkPositiveOrZero instead of if statement.

Result:

Re-use utility method.
2019-01-31 09:06:59 +01:00
田欧
6222101924 migrate java8: use lambda and method reference (#8781)
Motivation:

We can use lambdas now as we use Java8.

Modification:

use lambda function for all package, #8751 only migrate transport package.

Result:

Code cleanup.
2019-01-29 14:06:05 +01:00
田欧
e941cbe27a remove unused import statement (#8792)
Motivation:
The code contained some unused import statements.

Modification:
Remove unused import statements.

Result:
Code cleanup
2019-01-28 16:50:15 +01:00
kezhenxu94
7b6336f1fd Java 8 Migration: remove uneccessary if statement (#8755)
Motivation:

As netty 4.x supported Java 6 we had various if statements to check for java versions < 8. We can remove these now.

Modification:

Remove unnecessary if statements that check for java versions < 8.

Result:

Cleanup code.
2019-01-25 08:57:11 +01:00
Norman Maurer
310f31b392
Update to new checkstyle plugin (#8777)
Motivation:

We need to update to a new checkstyle plugin to allow the usage of lambdas.

Modifications:

- Update to new plugin version.
- Fix checkstyle problems.

Result:

Be able to use checkstyle plugin which supports new Java syntax.
2019-01-24 16:24:19 +01:00
Nick Hill
9e7385ddba Fix three bugs in CompositeByteBuf (#8773)
Motivation

In #8758, @doom369 reported an infinite loop bug in CompositeByteBuf
which was introduced in #8437.

This is the same small fix for that, along with fixes for two other bugs
found while re-inspecting the changes and adding unit tests.

Modification

- Replace recursive call to toComponentIndex with toComponentIndex0 as
intended
- Add missed "lastAccessed" racy cache invalidation in capacity(int)
method
- Fix incorrect determination of initial offset in non-zero cIndex case
of updateComponentOffsets method
- New unit tests for previously uncovered methods

Results

Fewer bugs.
2019-01-24 14:59:33 +01:00
Dmitriy Dumanskiy
4a10357fd8 IDE warnings cleanup (#8768)
Motivation:

IDE shows some warnings

Modification:

Small IDE warnings cleanup in different places.

Result:

Less warnings
2019-01-23 14:01:48 +01:00
Dmitriy Dumanskiy
7b92ff2500 Java 8 migration. Remove ThreadLocalProvider and inline java.util.concurrent.ThreadLocalRandom.current() where necessary. (#8762)
Motivation:

Custom Netty ThreadLocalRandom and ThreadLocalRandomProvider classes are no longer needed and can be removed.

Modification:

Remove own ThreadLocalRandom

Result:

Less code to maintain
2019-01-22 20:14:28 +01:00
田欧
9d62deeb6f Java 8 migration: Use diamond operator (#8749)
Motivation:

We can use the diamond operator these days.

Modification:

Use diamond operator whenever possible.

Result:

More modern code and less boiler-plate.
2019-01-22 16:07:26 +01:00
Dmitriy Dumanskiy
b2a9a8e9fe Java 8 migration. Removed custom LongCounter and LongAdderCounter classes and replaced with direct reference to LongAdder (#8750)
Motivation:

After switching to Java 8 we no longer need LongCounter and LongAdderCounter. We can directly replace them with LongAdder.

Modification:

Removed LongCounter and LongAdderCounter classes.

Result:

Less code to maintain
2019-01-22 13:53:28 +01:00
Derek Lewis
13f640cbba Updating ByteBuf Javadocs to represent actual behaviour. (#8709)
Motivation:

The javadocs stating `IndexOutOfBoundsException` is thrown were
different from what `ByteBuf` actually did. We want to ensure the
Javadocs represent reality.

Modifications:

Updated javadocs on `write*`, `ensureWriteable`, `capacity`, and
`maxCapacity` methods.

Results:

Javadocs more closely match actual behaviour.
2019-01-14 20:09:18 +01:00
kashike
c0aa1ea5c7 Fix minor spelling issues in javadocs (#8701)
Motivation:

Javadocs contained some spelling errors, we should fix these.

Modification:

Fix spelling

Result:

Javadoc cleanup.
2019-01-14 07:25:13 +01:00
Norman Maurer
d9a6cf341c
Remove support for marking reader and writerIndex in ByteBuf to reduce overhead and complexity. (#8636)
Motivation:

ByteBuf supports “marker indexes”. The intended use case for these is if a speculative operation (e.g. decode) is in process the user can “mark” and interface and refer to it later if the operation isn’t successful (e.g. not enough data). However this is rarely used in practice,
requires extra memory to maintain, and introduces complexity in the state management for derived/pooled buffer initialization, resizing, and other operations which may modify reader/writer indexes.

Modifications:

Remove support for marking and adjust testcases / code.

Result:

Fixes https://github.com/netty/netty/issues/8535.
2018-12-11 14:00:49 +01:00
Nick Travers
0a8c93a6fa Loosen bounds check on CompositeByteBuf's maxNumComponents (#8621)
Motivation:

In versions of Netty prior to 4.1.31.Final, a CompositeByteBuf could be
created with any size (including potentially nonsensical negative
values). This behavior changed in e7737b993, which introduced a bounds
check to only allow for a component size greater than one. This broke
some existing use cases that attempted to create a byte buf with a
single component.

Modifications:

Lower the bounds check on numComponents to include the single component
case, but still throw an exception for anything less than one.

Add unit tests for the case of numComponents being less than, equal to,
and greater than this lower bound.

Result:

Return to the behavior of 4.1.30.Final, allowing one component, but
still include an explicit check against a lower bound.

Note that while creating a CompositeByteBuf with a single component is
in some ways a contradiction of the term "composite", this patch caters
for existing uses while excluding the clearly nonsensical case of asking
for a CompositeByteBuf with zero or fewer components.

Fixes #8613.
2018-12-05 08:43:53 +01:00
Norman Maurer
85c1590a90 Provide a way to cache the internal nioBuffer of the PooledByteBuffer… (#8603)
Motivation:

Often a temporary ByteBuffer is used which can be cached to reduce the GC pressure.

Modifications:

Cache the ByteBuffer in the PoolThreadCache as well.

Result:

Less GC.
2018-12-04 15:39:55 +01:00
Nick Hill
fc0a4e15ab Harden ref-counting concurrency semantics (#8583)
Motivation

#8563 highlighted race conditions introduced by the prior optimistic
update optimization in 83a19d5650. These
were known at the time but considered acceptable given the perf
benefit in high contention scenarios.

This PR proposes a modified approach which provides roughly half the
gains but stronger concurrency semantics. Race conditions still exist
but their scope is narrowed to much less likely cases (releases
coinciding with retain overflow), and even in those
cases certain guarantees are still assured. Once release() returns true,
all subsequent release/retains are guaranteed to throw, and in
particular deallocate will be called at most once.

Modifications

- Use even numbers internally (including -ve) for live refcounts
- "Final" release changes to odd number (equivalent to refcount 0)
- Retain still uses faster getAndAdd, release uses CAS loop
- First CAS attempt uses non-volatile read
- Thread.yield() after a failed CAS provides a net gain

Result

More (though not completely) robust concurrency semantics for ref
counting; increased latency under high contention, but still roughly
twice as fast as the original logic. Bench results to follow
2018-11-29 08:32:50 +01:00
Norman Maurer
42e0ce6f7a Move less common code-path to extra method to allow inlining of writeUtf8. (#8600)
Motivation:

ByteBuf is used everywhere so we should try hard to be able to make things inlinable. During benchmarks it showed that writeCharSequence(...) fails to inline writeUtf8 because it is too big even if its hots.

Modifications:

Move less common code-path to extra method to allow inlining.

Result:

Be able to inline writeUtf8 in most cases.
2018-11-27 21:04:13 +01:00
Norman Maurer
45e9fd4802 Revert "Provide a way to cache the internal nioBuffer of the PooledByteBuffer to reduce GC. (#8593)"
This reverts commit 945f123f8b as it seems to produce some failures in some cases. This needs more research.
2018-11-27 20:03:33 +01:00
Norman Maurer
945f123f8b Provide a way to cache the internal nioBuffer of the PooledByteBuffer to reduce GC. (#8593)
Motivation:

Often a temporary ByteBuffer is used which can be cached to reduce the GC pressure.

Modifications:

Add a Deque per PoolChunk which will be used for caching.

Result:

Less GC.
2018-11-27 13:55:24 +01:00
Rolandz
836c39b82f Fix offset calculation in PooledByteBufAllocator when used
Motivation:

When we create new chunk with memory aligned, the offset of direct memory should be
'alignment - address & (alignment - 1)', not just 'address & (alignment - 1)'.

Modification:

Change offset calculating formula to offset = alignment - address & (alignment - 1) in PoolArena.DirectArena#offsetCacheLine and add a unit test to assert that.

Result:

Correctly calculate offset.
2018-11-27 11:47:40 +01:00
Norman Maurer
2c78dde749 Update version number to start working on Netty 5 2018-11-20 15:49:57 +01:00
Nick Hill
804e1fa9cc Fix ref-counting when CompositeByteBuf is used with retainedSlice() (#8497)
Motivation:

ByteBuf.retainedSlice() and similar methods produce sliced buffers with
an independent refcount to the buffer that they wrap.


One of the optimizations in 10539f4dc7 was
to use the ref to the unwrapped buffer object for added slices, but this
did not take into account the above special case when later releasing.

Thanks to @rkapsi for discovering this via #8495.

Modifications:

Since a reference to the slice is still kept in the Component class,
just changed Component.freeIfNecessary() to release the slice in
preference to the unwrapped buf.

Also added a unit test which reproduces the bug.

Result:

Fixes #8495
2018-11-13 20:56:09 +01:00
Nick Hill
0f8ce1b284 Fix incorrect sizing of temp byte arrays in (Unsafe)ByteBufUtil (#8484)
Motivation:

Two similar bugs were introduced by myself in separate recent PRs #8393
and #8464, while optimizing the assignment/handling of temporary arrays
in ByteBufUtil and UnsafeByteBufUtil.

The temp arrays allocated for buffering data written to an OutputStream
are incorrectly sized to the full length of the data to copy rather than
being capped at WRITE_CHUNK_SIZE.

Unfortunately one of these is in the 4.1.31.Final release, I'm really
sorry and will be more careful in future.

This kind of thing is tricky to cover in unit tests.

Modifications:

Revert the temp array allocations back to their original sizes.

Avoid making duplicate calls to ByteBuf.capacity() in a couple of places
in ByteBufUtil (unrelated thing I noticed, can remove it from this PR if
desired!)

Result:

Temporary byte arrays will be reverted to their originally intended
sizes.
2018-11-09 18:24:38 +01:00
Nick Hill
5954110b9a Use ByteBufUtil.BYTE_ARRAYS ThreadLocal temporary arrays in more places (#8464)
Motivation:

#8388 introduced a reusable ThreadLocal<byte[]> for use in
decodeString(...). It can be used in more places in the buffer package
to avoid temporary allocations of small arrays.

Modifications:

Encapsulate use of the ThreadLocal in a static package-private
ByteBufUtil.threadLocalTempArray(int) method, and make use of it from a
handful of new places including ByteBufUtil.readBytes(...).

Result:

Fewer short-lived small byte array allocations.
2018-11-05 21:11:28 +01:00
Nick Hill
10539f4dc7 Streamline CompositeByteBuf internals (#8437)
Motivation:

CompositeByteBuf is a powerful and versatile abstraction, allowing for
manipulation of large data without copying bytes. There is still a
non-negligible cost to reading/writing however relative to "singular"
ByteBufs, and this can be mostly eliminated with some rework of the
internals.

My use case is message modification/transformation while zero-copy
proxying. For example replacing a string within a large message with one
of a different length

Modifications:

- No longer slice added buffers and unwrap added slices
   - Components store target buf offset relative to position in
composite buf
   - Less allocations, object footprint, pointer indirection, offset
arithmetic
- Use Component[] rather than ArrayList<Component>
   - Avoid pointer indirection and duplicate bounds check, more
efficient backing array growth
   - Facilitates optimization when doing bulk-inserts - inserting n
ByteBufs behind m is now O(m + n) instead of O(mn)
- Avoid unnecessary casting and method call indirection via superclass
- Eliminate some duplicate range/ref checks via non-checking versions of
toComponentIndex and findComponent
- Add simple fast-path for toComponentIndex(0); add racy cache of
last-accessed Component to findComponent(int)
- Override forEachByte0(...) and forEachByteDesc0(...) methods
- Make use of RecyclableArrayList in nioBuffers(int, int) (in line with
FasterCompositeByteBuf impl)
- Modify addComponents0(boolean,int,Iterable) to use the Iterable
directly rather than copy to an array first (and possibly to an
ArrayList before that)
- Optimize addComponents0(boolean,int,ByteBuf[],int) to not perform
repeated array insertions and avoid second loop for offset updates
- Simplify other logic in various places, in particular the general
pattern used where a sub-range is iterated over
- Add benchmarks to demonstrate some improvements

While refactoring I also came across a couple of clear bugs. They are
fixed in these changes but I will open another PR with unit tests and
fixes to the current version.

Result:

Much faster creation, manipulation, and access; many fewer allocations
and smaller footprint. Benchmark results to follow.
2018-11-03 10:37:07 +01:00
Nick Hill
44cca1a26f Avoid allocations when wrapping byte[] and ByteBuffer arrays as ByteBuf (#8420)
Motivation:

Unpooled.wrap(byte[]...) and Unpooled.wrap(ByteBuffer...) currently
allocate/copy an intermediate ByteBuf ArrayList and array, which can be
avoided.

Modifications:

- Define new internal ByteWrapper interface and add a CompositeByteBuf
constructor which takes a ByteWrapper with an array of the type that it
wraps, and modify the appropriate Unpooled.wrap(...) methods to take
advantage of it
- Tidy up other constructors in CompositeByteBuf to remove duplication
and misleading len arg (which is really an end offset into provided
array)

Result:

Less allocation/copying when wrapping byte[] and ByteBuffer arrays,
tidier code.
2018-10-30 19:35:39 +01:00
root
3e7ddb36c7 [maven-release-plugin] prepare for next development iteration 2018-10-29 15:38:51 +00:00
root
9e50739601 [maven-release-plugin] prepare release netty-4.1.31.Final 2018-10-29 15:37:47 +00:00
Nick Hill
48c45cf4ac Fix leak and corruption bugs in CompositeByteBuf (#8438)
Motivation:

I came across two bugs:
- Components removed due to capacity reduction aren't released
- Offsets aren't set correctly on empty components that are added
between existing components

Modifications:

Add unit tests which expose these bugs, fix them.

Result:

Bugs are fixed
2018-10-28 10:28:18 +01:00
Nick Hill
d7fa7be67f Exploit PlatformDependent.allocateUninitializedArray() in more places (#8393)
Motivation:

There are currently many more places where this could be used which were
possibly not considered when the method was added.

If https://github.com/netty/netty/pull/8388 is included in its current
form, a number of these places could additionally make use of the same
BYTE_ARRAYS threadlocal.

There's also a couple of adjacent places where an optimistically-pooled
heap buffer is used for temp byte storage which could use the
threadlocal too in preference to allocating a temp heap bytebuf wrapper.
For example
https://github.com/netty/netty/blob/4.1/buffer/src/main/java/io/netty/buffer/ByteBufUtil.java#L1417.

Modifications:

Replace new byte[] with PlatformDependent.allocateUninitializedArray()
where appropriate; make use of ByteBufUtil.getBytes() in some places
which currently perform the equivalent logic, including avoiding copy of
backing array if possible (although would be rare).

Result:

Further potential speed-up with java9+ and appropriate compile flags.
Many of these places could be on latency-sensitive code paths.
2018-10-27 10:43:28 -05:00
Nick Hill
583d838f7c Optimize AbstractByteBuf.getCharSequence() in US_ASCII case (#8392)
* Optimize AbstractByteBuf.getCharSequence() in US_ASCII case

Motivation:

Inspired by https://github.com/netty/netty/pull/8388, I noticed this
simple optimization to avoid char[] allocation (also suggested in a TODO
here).

Modifications:

Return an AsciiString from AbstractByteBuf.getCharSequence() if
requested charset is US_ASCII or ISO_8859_1 (latter thanks to
@Scottmitch's suggestion). Also tweak unit tests not to require Strings
and include a new benchmark to demonstrate the speedup.

Result:

Speed-up of AbstractByteBuf.getCharSequence() in ascii and iso 8859/1
cases
2018-10-26 15:32:38 -07:00
Norman Maurer
87ec2f882a
Reduce overhead by ByteBufUtil.decodeString(...) which is used by AbstractByteBuf.toString(...) and AbstractByteBuf.getCharSequence(...) (#8388)
Motivation:

Our current implementation that is used for toString(Charset) operations on AbstractByteBuf implementation is quite slow as it does a lot of uncessary memory copies. We should just use new String(...) as it has a lot of optimizations to handle these cases.

Modifications:

Rewrite ByteBufUtil.decodeString(...) to use new String(...)

Result:

Less overhead for toString(Charset) operations.

Benchmark                                         (charsetName)  (direct)  (size)   Mode  Cnt         Score         Error  Units
ByteBufUtilDecodeStringBenchmark.decodeString          US-ASCII     false       8  thrpt   20  22401645.093 ? 4671452.479  ops/s
ByteBufUtilDecodeStringBenchmark.decodeString          US-ASCII     false      64  thrpt   20  23678483.384 ? 3749164.446  ops/s
ByteBufUtilDecodeStringBenchmark.decodeString          US-ASCII      true       8  thrpt   20  15731142.651 ? 3782931.591  ops/s
ByteBufUtilDecodeStringBenchmark.decodeString          US-ASCII      true      64  thrpt   20  16244232.229 ? 1886259.658  ops/s
ByteBufUtilDecodeStringBenchmark.decodeString             UTF-8     false       8  thrpt   20  25983680.959 ? 5045782.289  ops/s
ByteBufUtilDecodeStringBenchmark.decodeString             UTF-8     false      64  thrpt   20  26235589.339 ? 2867004.950  ops/s
ByteBufUtilDecodeStringBenchmark.decodeString             UTF-8      true       8  thrpt   20  18499027.808 ? 4784684.268  ops/s
ByteBufUtilDecodeStringBenchmark.decodeString             UTF-8      true      64  thrpt   20  16825286.141 ? 1008712.342  ops/s
ByteBufUtilDecodeStringBenchmark.decodeString            UTF-16     false       8  thrpt   20   5789879.092 ? 1201786.359  ops/s
ByteBufUtilDecodeStringBenchmark.decodeString            UTF-16     false      64  thrpt   20   2173243.225 ?  417809.341  ops/s
ByteBufUtilDecodeStringBenchmark.decodeString            UTF-16      true       8  thrpt   20   5035583.011 ? 1001978.854  ops/s
ByteBufUtilDecodeStringBenchmark.decodeString            UTF-16      true      64  thrpt   20   2162345.301 ?  402410.408  ops/s
ByteBufUtilDecodeStringBenchmark.decodeString        ISO-8859-1     false       8  thrpt   20  30039052.376 ? 6539111.622  ops/s
ByteBufUtilDecodeStringBenchmark.decodeString        ISO-8859-1     false      64  thrpt   20  31414163.515 ? 2096710.526  ops/s
ByteBufUtilDecodeStringBenchmark.decodeString        ISO-8859-1      true       8  thrpt   20  19538587.855 ? 4639115.572  ops/s
ByteBufUtilDecodeStringBenchmark.decodeString        ISO-8859-1      true      64  thrpt   20  19467839.722 ? 1672687.213  ops/s
ByteBufUtilDecodeStringBenchmark.decodeStringOld       US-ASCII     false       8  thrpt   20  10787326.745 ? 1034197.864  ops/s
ByteBufUtilDecodeStringBenchmark.decodeStringOld       US-ASCII     false      64  thrpt   20   7129801.930 ? 1363019.209  ops/s
ByteBufUtilDecodeStringBenchmark.decodeStringOld       US-ASCII      true       8  thrpt   20   9002529.605 ? 2017642.445  ops/s
ByteBufUtilDecodeStringBenchmark.decodeStringOld       US-ASCII      true      64  thrpt   20   3860192.352 ?  826218.738  ops/s
ByteBufUtilDecodeStringBenchmark.decodeStringOld          UTF-8     false       8  thrpt   20  10532838.027 ? 2151743.968  ops/s
ByteBufUtilDecodeStringBenchmark.decodeStringOld          UTF-8     false      64  thrpt   20   7185554.597 ? 1387685.785  ops/s
ByteBufUtilDecodeStringBenchmark.decodeStringOld          UTF-8      true       8  thrpt   20   7352253.316 ? 1333823.850  ops/s
ByteBufUtilDecodeStringBenchmark.decodeStringOld          UTF-8      true      64  thrpt   20   2825578.707 ?  349701.156  ops/s
ByteBufUtilDecodeStringBenchmark.decodeStringOld         UTF-16     false       8  thrpt   20   7277446.665 ? 1447034.346  ops/s
ByteBufUtilDecodeStringBenchmark.decodeStringOld         UTF-16     false      64  thrpt   20   2445929.579 ?  562816.641  ops/s
ByteBufUtilDecodeStringBenchmark.decodeStringOld         UTF-16      true       8  thrpt   20   6201174.401 ? 1236137.786  ops/s
ByteBufUtilDecodeStringBenchmark.decodeStringOld         UTF-16      true      64  thrpt   20   2310674.973 ?  525587.959  ops/s
ByteBufUtilDecodeStringBenchmark.decodeStringOld     ISO-8859-1     false       8  thrpt   20  11142625.392 ? 1680556.468  ops/s
ByteBufUtilDecodeStringBenchmark.decodeStringOld     ISO-8859-1     false      64  thrpt   20   8127116.405 ? 1128513.860  ops/s
ByteBufUtilDecodeStringBenchmark.decodeStringOld     ISO-8859-1      true       8  thrpt   20   9405751.952 ? 2193324.806  ops/s
ByteBufUtilDecodeStringBenchmark.decodeStringOld     ISO-8859-1      true      64  thrpt   20   3943282.076 ?  737798.070  ops/s

Benchmark result is saved to /home/norman/mainframer/netty/microbench/target/reports/performance/ByteBufUtilDecodeStringBenchmark.json
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1,030.173 sec - in io.netty.buffer.ByteBufUtilDecodeStringBenchmark
[1030.460s][info   ][gc,heap,exit ] Heap
[1030.460s][info   ][gc,heap,exit ]  garbage-first heap   total 516096K, used 257918K [0x0000000609a00000, 0x0000000800000000)
[1030.460s][info   ][gc,heap,exit ]   region size 2048K, 127 young (260096K), 2 survivors (4096K)
[1030.460s][info   ][gc,heap,exit ]  Metaspace       used 17123K, capacity 17438K, committed 17792K, reserved 1064960K
[1030.460s][info   ][gc,heap,exit ]   class space    used 1709K, capacity 1827K, committed 1920K, reserved 1048576K
2018-10-19 14:00:13 +02:00
Norman Maurer
69545aedc4
CompositeByteBuf.decompose(...) does not correctly slice content. (#8403)
Motivation:

CompositeByteBuf.decompose(...) did not correctly slice the content and so produced an incorrect representation of the data.

Modifications:

- Rewrote implementation to fix bug and also improved it to reduce GC
- Add unit tests.

Result:

Fixes https://github.com/netty/netty/issues/8400.
2018-10-19 08:05:22 +02:00
Nick Hill
7062ceedb0 Simplify ByteBufInputStream.readLine() logic (#8380)
Motivation:

While looking at the nice optimization done in
https://github.com/netty/netty/pull/8347 I couldn't help noticing the
logic could be simplified further. Apologies if this is just my OCD and
inappropriate!

Modifications:

Reduce amount of code used for ByteBufInputStream.readLine()

Result:

Slightly smaller and simpler code
2018-10-13 06:24:40 +02:00
Francesco Nigro
83dc3b503e ByteBufInputStream is always allocating a StringBuilder instance (#8347)
Motivation:

Avoid creating any StringBuilder instance if
ByteBufInputStream::readLine isn't used

Modifications:

The StringBuilder instance is lazy allocated on demand and
are added new test case branches to address the increased
complexity of ByteBufInputStream::readLine

Result:

Reduced GC activity if ByteBufInputStream::readLine isn't used
2018-10-11 14:56:29 +08:00
Dmitriy Dumanskiy
6cebb6069b remove unnecessary vararg argument in PooledByteBufAllocator (#8338)
Motivation:

No need in varargs, the method always accepts array.

Modification:

... replaced with []
2018-10-05 19:06:44 +08:00
root
2d7cb47edd [maven-release-plugin] prepare for next development iteration 2018-09-27 19:00:45 +00:00
root
3a9ac829d5 [maven-release-plugin] prepare release netty-4.1.30.Final 2018-09-27 18:56:12 +00:00
Norman Maurer
c14efd952d
Directly init refCnt to 1 (#8274)
Motivation:

We should just directly init the refCnt to 1 and not use the AtomicIntegerFieldUpdater.

Modifications:

Just assing directly to 1.

Result:

Cleaner code and possible a bit faster as the JVM / JIT may be able to optimize the first store easily.
2018-09-07 19:04:19 +02:00
Norman Maurer
e542a2cf26
Use a non-volatile read for ensureAccessible() whenever possible to reduce overhead and allow better inlining. (#8266)
Motiviation:

At the moment whenever ensureAccessible() is called in our ByteBuf implementations (which is basically on each operation) we will do a volatile read. That per-se is not such a bad thing but the problem here is that it will also reduce the the optimizations that the compiler / jit can do. For example as these are volatile it can not eliminate multiple loads of it when inline the methods of ByteBuf which happens quite frequently because most of them a quite small and very hot. That is especially true for all the methods that act on primitives.

It gets even worse as people often call a lot of these after each other in the same method or even use method chaining here.

The idea of the change is basically just ue a non-volatile read for the ensureAccessible() check as its a best-effort implementation to detect acting on already released buffers anyway as even with a volatile read it could happen that the user will release it in another thread before we actual access the buffer after the reference check.

Modifications:

- Try to do a non-volatile read using sun.misc.Unsafe if we can use it.
- Add a benchmark

Result:

Big performance win when multiple ByteBuf methods are called from a method.

With the change:
UnsafeByteBufBenchmark.setGetLongUnsafeByteBuf  thrpt   20  281395842,128 ± 5050792,296  ops/s

Before the change:
UnsafeByteBufBenchmark.setGetLongUnsafeByteBuf  thrpt   20  217419832,801 ± 5080579,030  ops/s
2018-09-07 07:47:02 +02:00
Francesco Nigro
c78be33443 Added configurable ByteBuf bounds checking (#7521)
Motivation:

The JVM isn't always able to hoist out/reduce bounds checking (due to ref counting operations etc etc) hence making it configurable could improve performances for most CPU intensive use cases.

Modifications:

Each AbstractByteBuf bounds check has been tested against a new static final configuration property similar to checkAccessible ie io.netty.buffer.bytebuf.checkBounds.

Result:

Any user could disable ByteBuf bounds checking in order to get extra performances.
2018-09-03 20:33:47 +02:00
Norman Maurer
54f565ac67
Allow to use native transports when sun.misc.Unsafe is not present on… (#8231)
* Allow to use native transports when sun.misc.Unsafe is not present on the system

Motivation:

We should be able to use the native transports (epoll / kqueue) even when sun.misc.Unsafe is not present on the system. This is especially important as Java11 will be released soon and does not allow access to it by default.

Modifications:

- Correctly disable usage of sun.misc.Unsafe when -PnoUnsafe is used while running the build
- Correctly increment metric when UnpooledDirectByteBuf is allocated. This was uncovered once -PnoUnsafe usage was fixed.
- Implement fallbacks in all our native transport code for when sun.misc.Unsafe is not present.

Result:

Fixes https://github.com/netty/netty/issues/8229.
2018-08-29 19:36:33 +02:00
root
a580dc7585 [maven-release-plugin] prepare for next development iteration 2018-08-24 06:36:33 +00:00
root
3fc789e83f [maven-release-plugin] prepare release netty-4.1.29.Final 2018-08-24 06:36:06 +00:00
vincent-grosbois
0bea8ecf5d CompositeByteBuf nioBuffer doesn't always alloc (#8176)
In nioBuffer(int,int) in CompositeByteBuf , we create a sub-array of nioBuffers for the components that are in range, then concatenate all the components in range into a single bigger buffer.
However, if the call to nioBuffers() returned only one sub-buffer, then we are copying it to a newly-allocated buffer "merged" for no reason.

Motivation:

Profiler for Spark shows a lot of time spent in put() method inside nioBuffer(), while usually no copy of data is required.

Modification:
This change skips this last step and just returns a duplicate of the single buffer returned by the call to nioBuffers(), which will in most implementation not copy the data

Result:
No copy when the source is only 1 buffer
2018-08-07 11:31:24 +02:00
root
fcb19cb589 [maven-release-plugin] prepare for next development iteration 2018-07-27 04:59:28 +00:00
root
ff785fbe39 [maven-release-plugin] prepare release netty-4.1.28.Final 2018-07-27 04:59:06 +00:00
Norman Maurer
9b08dbca00
Leak detection combined with composite buffers results in incorrectly handled writerIndex when calling ByteBufUtil.writeAscii/writeUtf8 (#8153)
Motivation:

We need to add special handling for WrappedCompositeByteBuf as these also extend AbstractByteBuf, otherwise we will not correctly adjust / read the writerIndex during processing.

Modifications:

- Add instanceof checks for WrappedCompositeByteBuf as well.
- Add testcases

Result:

Fixes https://github.com/netty/netty/issues/8152.
2018-07-27 01:56:09 +08:00
root
b4dbdc2036 [maven-release-plugin] prepare for next development iteration 2018-07-11 15:37:40 +00:00
root
1c16519ac8 [maven-release-plugin] prepare release netty-4.1.27.Final 2018-07-11 15:37:21 +00:00
root
7bb9e7eafe [maven-release-plugin] prepare for next development iteration 2018-07-10 05:21:24 +00:00
root
8ca5421bd2 [maven-release-plugin] prepare release netty-4.1.26.Final 2018-07-10 05:18:13 +00:00
Norman Maurer
6afab517b0
Guard against calling PoolThreadCache.free() multiple times. (#8108)
Motivation:

5b1fe611a6 introduced the usage of a finalizer as last resort for PoolThreadCache. As we may call free() from the FastThreadLocal.onRemoval(...) and finalize() we need to guard against multiple calls as otherwise we will corrupt internal state (that is used for metrics).

Modifications:

Use AtomicBoolean to guard against multiple calls of PoolThreadCache.free().

Result:

No more corruption of internal state caused by calling PoolThreadCache.free() multuple times.
2018-07-09 15:58:12 -04:00
Nick Hill
fef462c043 Deprecate Unpooled.unmodifiableBuffer(ByteBuf...) (#8096)
Motivation:

Recent PR https://github.com/netty/netty/pull/8040 introduced
Unpooled.wrappedUnmodifiableBuffer(ByteBuf...) which has the same
behaviour but wraps the provided array directly. This is preferred for
most uses (including varargs-based use) and if there are any unusual
cases of an explicit array which is re-used before the ByteBuf is
finished with, it can just be copied first.

Modifications:

Added @Deprecated annotation and javadoc to
Unpooled.unmodifiableBuffer(ByteBuf...).

Result:

Unpooled.unmodifiableBuffer(ByteBuf...) will be deprecated.
2018-07-07 14:45:27 -04:00
Norman Maurer
83710cb2e1
Replace toArray(new T[size]) with toArray(new T[0]) to eliminate zero-out and allow the VM to optimize. (#8075)
Motivation:

Using toArray(new T[0]) is usually the faster aproach these days. We should use it.

See also https://shipilev.net/blog/2016/arrays-wisdom-ancients/#_conclusion.

Modifications:

Replace toArray(new T[size]) with toArray(new T[0]).

Result:

Faster code.
2018-06-29 07:56:04 +02:00
Norman Maurer
5b1fe611a6
Remove usage of ObjectCleaner (#8064)
Motivation:

ObjectCleaner does start a Thread to handle the cleaning of resources which leaks into the users application. We should not use it in netty itself to make things more predictable.

Modifications:

- Remove usage of ObjectCleaner and use finalize as a replacement when possible.
- Clarify javadocs for FastThreadLocal.onRemoval(...) to ensure its clear that remove() is not guaranteed to be called when the Thread completees and so this method is not enough to guarantee cleanup for this case.

Result:

Fixes https://github.com/netty/netty/issues/8017.
2018-06-28 08:15:27 +02:00
nickhill
f164759ea3 Support composite buffer creation without array alloc and copy
Motivation:

Unpooled.unmodifiableBuffer() is currently used to efficiently write
arrays of ByteBufs via FixedCompositeByteBuf, but involves an allocation
and content-copy of the provided ByteBuf array which in many (most?)
cases shouldn't be necessary.

Modifications:

Modify the internal FixedCompositeByteBuf class to support wrapping the
provided ByteBuf array directly. Control this behaviour with a
constructor flag and expose the "unsafe" version via a new
Unpooled.wrappedUnmodifiableBuffer(ByteBuf...) method.

Result:

Less garbage on IO paths. I would guess pretty much all existing usage
of unmodifiableBuffer() could use the copy-free version but assume it's
not safe to change its default behaviour.
2018-06-27 07:40:14 +02:00
nickhill
9b95b8ee62 Reduce array allocations during CompositeByteBuf construction
Motivation:

Eliminate avoidable backing array reallocations when constructing
composite ByteBufs from existing buffer arrays/Iterables. This also
applies to the Unpooled.wrappedBuffer(...) methods.

Modifications:

Ensure the initial components ComponentList is sized at least as large
as the provided buffer array/Iterable in the CompositeByteBuffer
constructors.

In single-arg Unpooled.wrappedBuffer(...) methods, set maxNumComponents
to the count of provided buffers, rather than a fixed default of 16. It
seems likely that most usage of these involves wrapping a list without
subsequent modification, particularly since they return a ByteBuf rather
than CompositeByteBuf. If a different/larger max is required there are
already the wrappedBuffer(int, ...) variants.

In fact the current behaviour could be considered inconsistent - if you
call Unpooled.wrappedBuffer(int, ByteBuf) with a single buffer, you
might expect to subsequently be able to add buffers to it (since you
specified a max related to consolidation), but it will in fact return
just a slice of the provided ByteBuf.

Result:

Fewer and smaller allocations in some cases when using CompositeByteBufs
or Unpooled.wrappedBuffer(...).
2018-06-20 16:09:23 +02:00
Tim Brooks
35215309b9 Make UnpooledHeapByteBuf array methods protected (#8015)
Motivation:

Currently there is not a clear way to provide a byte array to a netty
ByteBuf and be informed when it is released. This is a would be a
valuable addition for projects that integrate with netty but also pool
their own byte arrays.

Modification:

Modified the UnpooledHeapByteBuf class so that the freeArray method is
protected visibility instead of default. This will allow a user to
subclass the UnpooledHeapByteBuf, provide a byte array, and override
freeArray to return the byte array to a pool when it is called.
Additionally this makes this implementation equivalent to
UnpooledDirectByteBuf (freeDirect is protected).

Additionally allocateArray is also made protect to provide another override
option for subclasses.

Result:

Users can override UnpooledHeapByteBuf#freeArray and
UnpooledHeapByteBuf#allocateArray.
2018-06-13 11:43:31 -07:00
zekaryu
09d9daf1c4 Update the comment of io.netty.buffer.PoolChunk.java (#7934)
Motivation:

When I read the source code, I found that the comment of PoolChunk is out of date, it may confuses readers with the description about memoryMap.

Modifications:

update the last passage of the comment of the PoolChunk class.

Result:
No change to any source code , just update comment.
2018-05-14 15:44:32 +02:00
Norman Maurer
64bb279f47 [maven-release-plugin] prepare for next development iteration 2018-05-14 11:11:45 +00:00
Norman Maurer
c67a3b0507 [maven-release-plugin] prepare release netty-4.1.25.Final 2018-05-14 11:11:24 +00:00
Xiaoyan Lin
a0ed6ec06c Fix the error message in ReferenceCounted.release (#7921)
Motivation:

When a buffer is over-released, the current error message of `IllegalReferenceCountException` is `refCnt: XXX, increment: XXX`, which is confusing. The correct message should be `refCnt: XXX, decrement: XXX`.

Modifications:

Pass `-decrement` to create `IllegalReferenceCountException`.

Result:

The error message will be `refCnt: XXX, decrement: XXX` when a buffer is over-released.
2018-05-08 20:09:16 +02:00
Rikki Gibson
1b1f7677ac Implement isWritable and ensureWritable on ReadOnlyByteBufferBuf (#7883)
Motivation:

It should be possible to write a ReadOnlyByteBufferBuf to a channel without errors. However, ReadOnlyByteBufferBuf does not override isWritable and ensureWritable, which can cause some handlers to mistakenly assume they can write to the ReadOnlyByteBufferBuf, resulting in ReadOnlyBufferException.

Modification:

Added isWritable and ensureWritable method overrides on ReadOnlyByteBufferBuf to indicate that it is never writable. Added tests for these methods.

Result:

Can successfully write ReadOnlyByteBufferBuf to a channel with an SslHandler (or any other handler which may attempt to write to the ByteBuf it receives).
2018-04-23 08:31:30 +02:00
Norman Maurer
b75f44db9a [maven-release-plugin] prepare for next development iteration 2018-04-19 11:56:07 +00:00
Norman Maurer
04fac00c8c [maven-release-plugin] prepare release netty-4.1.24.Final 2018-04-19 11:55:47 +00:00
Nikolay Fedorovskikh
81a7d1413b Makes EmptyByteBuf#hashCode and AbstractByteBuf#hashCode consistent (#7870)
Motivation:
The `AbstractByteBuf#equals` method doesn't take into account the
class of buffer instance. So the two buffers with different classes
must have the same `hashCode` values if `equals` method returns `true`.
But `EmptyByteBuf#hashCode` is not consistent with `#hashCode`
of the empty `AbstractByteBuf`, that is violates the contract and
can lead to errors.

Modifications:
Return `1` in `EmptyByteBuf#hashCode`.

Result:
Consistent behavior of `EmptyByteBuf#hashCode` and `AbstractByteBuf#hashCode`.
2018-04-16 12:11:42 +02:00
Nikolay Fedorovskikh
f8ff834f03 Checks accessibility in the #slice and #duplicate methods of ByteBuf (#7846)
Motivation:
The `ByteBuf#slice` and `ByteBuf#duplicate` methods should check
an accessibility to prevent creation slice or duplicate
of released buffer. At now this works not in the all scenarios.

Modifications:
Add missed checks.

Result:
More correct and consistent behavior of `ByteBuf` methods.
2018-04-10 10:41:50 +02:00
root
0a61f055f5 [maven-release-plugin] prepare for next development iteration 2018-04-04 10:44:46 +00:00
root
8c549bad38 [maven-release-plugin] prepare release netty-4.1.23.Final 2018-04-04 10:44:15 +00:00
Nikolay Fedorovskikh
a95fd91bc6 Don't check accessible in the #capacity method (#7830)
Motivation:
The `#ensureAccessible` method in `UnpooledHeapByteBuf#capacity` used
to prevent NPE if buffer is released and `array` is `null`. In all
other implementations of `ByteBuf` the accessible is not checked by
`capacity` method. We can assign an empty array to `array`
in the `deallocate` and don't worry about NPE in the `#capacity`.
This will help reduce the number of repeated calls of the
`#ensureAccessible` in many operations with `UnpooledHeapByteBuf`.

Modifications:
1. Remove `#ensureAccessible` call from `UnpooledHeapByteBuf#capacity`.
Use the `EmptyArrays#EMPTY_BYTES` instead of `null` in `#deallocate`.

2. Fix access checks in `AbstractUnsafeSwappedByteBuf` and
`AbstractByteBuf#slice` that relied on `#ensureAccessible`
in `UnpooledHeapByteBuf#capacity`. This was found by unit tests.

Result:
Less double calls of `#ensureAccessible` for `UnpooledHeapByteBuf`.
2018-04-03 21:35:02 +02:00
Norman Maurer
965734a1eb
Limit the number of bytes to use to copy the content of a direct buffer to an Outputstream (#7813)
Motivation:

Currently copying a direct ByteBuf copies it fully into the heap before writing it to an output stream.
The can result in huge memory usage on the heap.

Modification:

copy the bytebuf contents via an 8k buffer into the output stream

Result:

Fixes #7804
2018-03-29 12:49:27 +02:00
Norman Maurer
bd772d127e FixedCompositeByteBuf should allow to access memoryAddress / array when wrap a single buffer.
Motivation:

We should allow to access the memoryAddress / array of the FixedCompositeByteBuf when it only wraps a single ByteBuf. We do the same for CompositeByteBuf.

Modifications:

- Check how many buffers FixedCompositeByteBuf wraps and depending on it delegate the access to the memoryAddress / array
- Add unit tests.

Result:

Fixes [#7752].
2018-03-13 08:50:42 +01:00
kakashiio
12ccd40c5a Correctly throw IndexOutOfBoundsException when writerIndex < readerIndex
Motivation:

If someone invoke writeByte(), markWriterIndex(), readByte() in order first, and then invoke resetWriterIndex() should be throw a IndexOutOfBoundsException to obey the rule that the buffer declared "0 <= readerIndex <= writerIndex <= capacity".

Modification:

Changed the code writerIndex = markedWriterIndex; into writerIndex(markedWriterIndex); to make the check affect

Result:
Throw IndexOutOfBoundsException if any invalid happened in resetWriterIndex.
2018-03-02 10:05:33 +09:00
Francesco Nigro
ed46c4ed00 Copies from read-only heap ByteBuffer to direct ByteBuf can avoid stealth ByteBuf allocation and additional copies
Motivation:

Read-only heap ByteBuffer doesn't expose array: the existent method to perform copies to direct ByteBuf involves the creation of a (maybe pooled) additional heap ByteBuf instance and copy

Modifications:

To avoid stressing the allocator with additional (and stealth) heap ByteBuf allocations is provided a method to perform copies using the (pooled) internal NIO buffer

Result:

Copies from read-only heap ByteBuffer to direct ByteBuf won't create any intermediate ByteBuf
2018-02-27 09:54:21 +09:00
Norman Maurer
69582c0b6c [maven-release-plugin] prepare for next development iteration 2018-02-21 12:52:33 +00:00
Norman Maurer
786f35c6c9 [maven-release-plugin] prepare release netty-4.1.22.Final 2018-02-21 12:52:19 +00:00
Francesco Nigro
bc8e022601 Added exact utf8 length estimator and exposed writeUtf8 with custom space reservation on destination buffer
Motivation:

To avoid eager allocation of the destination and to perform length prefixed encoding of UTF-8 string with forward only access pattern

Modifications:

The original writeUtf8 is modified by allowing customization of the reserved bytes on the destination buffer and is introduced an exact UTF-8 length estimator.

Result:

Is now possible to perform length first encoding with UTF-8 well-formed char sequences following a forward only write access pattern on the destination buffer.
2018-02-16 11:52:35 +01:00
Scott Mitchell
108fbe5282
ByteBufUtil to not pool direct memory by default
Motivation:
ByteBufUtil by default will cache DirectByteBuffer objects, and the
associated direct memory (up to 64k). In combination with the Recycler which may
cache up to 32k elements per thread may lead to a large amount of direct
memory being retained per EventLoop thread. As traffic spikes come this
may be perceived as a memory leak because the memory in the Recycler
will never be reclaimed.

Modifications:
- By default we shouldn't cache DirectByteBuffer objects.

Result:
Less direct memory consumption due to caching DirectByteBuffer objects.
2018-02-12 10:49:17 -08:00
Norman Maurer
e71fa1e7b6 [maven-release-plugin] prepare for next development iteration 2018-02-05 12:02:35 +00:00
Norman Maurer
41ebb5fcca [maven-release-plugin] prepare release netty-4.1.21.Final 2018-02-05 12:02:19 +00:00
Norman Maurer
fbbaf2bd7e Cleanup buffer tests.
Motivation:

There is some cleanup that can be done.

Modifications:

- Use intializer list expression where possible
- Remove unused imports.

Result:

Cleaner code.
2018-02-02 07:33:46 +01:00
Norman Maurer
011841e454 ReadOnlyUnsafeDirectByteBuf.memoryAddress() should not throw
Motivation:

We need the memoryAddress of a direct buffer when using our native transports. For this reason ReadOnlyUnsafeDirectByteBuf.memoryAddress() should not throw.

Modifications:

- Correctly override ReadOnlyUnsafeDirectByteBuf.memoryAddress() and hasMemoryAddress()
- Add test case

Result:

Fixes [#7672].
2018-02-02 07:27:26 +01:00
Norman Maurer
95b9b0af5c Increase timeout and decrement number of operations in AbstractByteBufTest.testToStringMultipleThreads
Motivation:

We saw some timeouts on the CI when the leak detection is enabled.

Modifications:

- Use smaller number of operations in test
- Increase timeout

Result:

CI not times out.
2018-01-31 14:57:38 +01:00
Norman Maurer
d2bd36fc4c ByteBufUtil.isText method should be safe to be called concurrently
Motivation:

ByteBufUtil.isText(...) may produce unexpected results if called concurrently on the same ByteBuffer.

Modifications:

- Don't use internalNioBuffer where it is not safe.
- Add unit test.

Result:

ByteBufUtil.isText is thread-safe.
2018-01-31 13:47:49 +01:00
Scott Mitchell
4921f62c8a
HttpResponseStatus object allocation reduction
Motivation:
Usages of HttpResponseStatus may result in more object allocation then necessary due to not looking for cached objects and the AsciiString parsing method not being used due to CharSequence method being used instead.

Modifications:
- HttpResponseDecoder should attempt to get the HttpResponseStatus from cache instead of allocating a new object
- HttpResponseStatus#parseLine(CharSequence) should check if the type is AsciiString and redirect to the AsciiString parsing method which may not require an additional toString call
- HttpResponseStatus#parseLine(AsciiString) can be optimized and doesn't require and may not require object allocation

Result:
Less allocations when dealing with HttpResponseStatus.
2018-01-24 22:01:52 -08:00
Norman Maurer
336bea9dc5 Fix ByteBuf.nioBuffer(...) and nioBuffers(...) docs to reflect reality.
Motivation:

Depending on the implementation of ByteBuf nioBuffer(...) and nioBuffers(...) may either share the content or return a ByteBuffer that contains a copy of the content.

Modifications:

Fix javadocs.

Result:

Correct docs.
2018-01-22 19:50:08 +01:00
Norman Maurer
ea58dc7ac7 [maven-release-plugin] prepare for next development iteration 2018-01-21 12:53:51 +00:00
Norman Maurer
96c7132dee [maven-release-plugin] prepare release netty-4.1.20.Final 2018-01-21 12:53:34 +00:00
Thomas Devanneaux
3ae57cf302 ByteBuf.toString(Charset) is not thread-safe
Motivation:

Calling ByteBuf.toString(Charset) on the same buffer from multiple threads at the same time produces unexpected results, such as various exceptions and/or corrupted output. This is because ByteBufUtil.decodeString(...) is taking the source ByteBuffer for CharsetDecoder.decode() from ByteBuf.internalNioBuffer(int, int), which is not thread-safe.

Modification:

Call ByteBuf.nioBuffer() instead of ByteBuf.internalNioBuffer() to get the source buffer to pass to CharsetDecoder.decode().

Result:

Fixes the possible race condition.
2018-01-21 09:02:42 +01:00
Norman Maurer
819b870b8a Correctly take position into account when wrap a ByteBuffer via ReadOnlyUnsafeDirectByteBuf
Motivation:

We did not correctly take the position into account when wrapping a ByteBuffer via ReadOnlyUnsafeDirectByteBuf as we obtained the memory address from the original ByteBuffer and not the slice we take.

Modifications:

- Correctly use the slice to obtain memory address.
- Add test case.

Result:

Fixes [#7565].
2018-01-16 19:18:59 +01:00
Norman Maurer
e329ca1cf3 Introduce ObjectCleaner and use it in FastThreadLocal to ensure FastThreadLocal.onRemoval(...) is called
Motivation:

There is no guarantee that FastThreadLocal.onRemoval(...) is called if the FastThreadLocal is used by "non" FastThreacLocalThreads. This can lead to all sort of problems, like for example memory leaks as direct memory is not correctly cleaned up etc.

Beside this we use ThreadDeathWatcher to check if we need to release buffers back to the pool when thread local caches are collected. In the past ThreadDeathWatcher was used which will need to "wakeup" every second to check if the registered Threads are still alive. If we can ensure FastThreadLocal.onRemoval(...) is called we do not need this anymore.

Modifications:

- Introduce ObjectCleaner and use it to ensure FastThreadLocal.onRemoval(...) is always called when a Thread is collected.
- Deprecate ThreadDeathWatcher
- Add unit tests.

Result:

Consistent way of cleanup FastThreadLocals when a Thread is collected.
2017-12-21 07:34:44 +01:00
Norman Maurer
264a5daa41 [maven-release-plugin] prepare for next development iteration 2017-12-15 13:10:54 +00:00
Norman Maurer
0786c4c8d9 [maven-release-plugin] prepare release netty-4.1.19.Final 2017-12-15 13:09:30 +00:00
Norman Maurer
1988cd041d Reduce Object allocations in CompositeByteBuf.
Motivation:

We used subList in CompositeByteBuf to remove ranges of elements from the internal storage. Beside this we also used an foreach loop in a few cases which will crate an Iterator.

Modifications:

- Use our own sub-class of ArrayList which exposes removeRange(...). This allows to remove a range of elements without an extra allocation.
- Use an old style for loop to iterate over the elements to reduce object allocations.

Result:

Less allocations.
2017-12-12 09:08:58 +01:00
Norman Maurer
b2bc6407ab [maven-release-plugin] prepare for next development iteration 2017-12-08 09:26:15 +00:00
Norman Maurer
96732f47d8 [maven-release-plugin] prepare release netty-4.1.18.Final 2017-12-08 09:25:56 +00:00
Tomasz Jędrzejewski
e8540c2b7a Adding stable JDK9 module names that follow reverse-DNS style
Automatic-Module-Name entry provides a stable JDK9 module name, when Netty is used in a modular JDK9 applications. More info: http://blog.joda.org/2017/05/java-se-9-jpms-automatic-modules.html

When Netty migrates to JDK9 in the future, the entry can be replaced by actual module-info descriptor.

Modification:

The POM-s are configured to put the correct module names to the manifest.

Result:

Fixes #7218.
2017-11-29 11:50:24 +01:00
Norman Maurer
09a05b680d Dont use ThreadDeathWatcher to cleanup PoolThreadCache if FastThreadLocalThread with wrapped Runnable is used
Motivation:

We dont need to use the ThreadDeathWatcher if we use a FastThreadLocalThread for which we wrap the Runnable and ensure we call FastThreadLocal.removeAll() once the Runnable completes.

Modifications:

- Dont use a ThreadDeathWatcher if we are sure we will call FastThreadLocal.removeAll()
- Add unit test.

Result:

Less overhead / running theads if you only allocate / deallocate from FastThreadLocalThreads.
2017-11-28 13:43:28 +01:00