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authorRickard Green <[email protected]>2019-02-27 13:19:37 +0100
committerRickard Green <[email protected]>2019-02-27 13:19:37 +0100
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Revert "Prepare release"
This reverts commit df130102cdeca8d35fec95a0c926fd1cfec54eab.
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</header>
<p>This document describes the changes made to the ERTS application.</p>
-<section><title>Erts 11.0</title>
-
- <section><title>Fixed Bugs and Malfunctions</title>
- <list>
- <item>
- <p>
- Do not allocate new bitstring/binary when an empty binary
- is appended.</p>
- <p>
- Own Id: OTP-15535 Aux Id: PR-2055 </p>
- </item>
- <item>
- <p>
- Document that <c>process_info(_, current_function)</c>
- can return <c>{current_function, undefined}</c> in case
- of execution of native code.</p>
- <p>
- Own Id: OTP-15543 Aux Id: PR-2089 </p>
- </item>
- </list>
- </section>
-
-
- <section><title>Improvements and New Features</title>
- <list>
- <item>
- <p>
- Add support for Erlang Distribution protocol to split the
- payload of large signals into several fragments. This
- allows other processes to communicate uninterrupted
- during the transmission of these signals.</p>
- <p>
- Own Id: OTP-13397</p>
- </item>
- <item>
- <p>
- A simple socket API has been provided through the socket
- module. Known issues are; No support for the Windows OS
- (currently), a small term leakage.</p>
- <p>
- Own Id: OTP-14831</p>
- </item>
- <item>
- <p>Added NIF functions <seealso
- marker="erl_nif#enif_set_pid_undefined"><c>enif_set_pid_undefined</c></seealso>,
- <seealso
- marker="erl_nif#enif_is_pid_undefined"><c>enif_is_pid_undefined</c></seealso>
- and <seealso
- marker="erl_nif#enif_compare_pids"><c>enif_compare_pids</c></seealso>.</p>
- <p>
- Own Id: OTP-15011 Aux Id: PR-2147 </p>
- </item>
- <item>
- <p>Underutilized memory segments (carriers) can now move
- between all allocator instances, rather than just between
- instances of the same type, which greatly reduces memory
- usage in some scenarios. </p>
- <p>
- Own Id: OTP-15063</p>
- </item>
- <item>
- <p>The emulator will now mark free blocks in pooled
- carriers with <c>madvise(2) + MADV_FREE</c> (or similar),
- letting the OS reclaim the associated physical memory if
- necessary.</p>
- <p>
- Own Id: OTP-15075</p>
- </item>
- <item>
- <p>
- New <c>ERL_NIF_SELECT_CANCEL</c> feature added to
- <c>enif_select</c> in order to cancel (or "deselect") a
- read or write event on a previously selected file
- descriptor.</p>
- <p>
- Own Id: OTP-15095</p>
- </item>
- <item>
- <p>
- ETS option <c>write_concurrency</c> now also affects and
- improves the scalability of <c>ordered_set</c> tables.
- The implementation is based on a data structure called
- contention adapting search tree, where the lock
- granularity adapts to the actual amount of concurrency
- exploited by the applications in runtime.</p>
- <p>
- Own Id: OTP-15128</p>
- </item>
- <item>
- <p>
- Build configuration of the <c>crypto</c> application has
- been moved from the <c>erts</c> application into the
- <c>crypto</c> application.</p>
- <p>
- Own Id: OTP-15129</p>
- </item>
- <item>
- <p>Anonymous functions that don't capture environment are
- now created at load-time instead of in run-time.</p>
- <p>
- Own Id: OTP-15195 Aux Id: PR-1812 </p>
- </item>
- <item>
- <p>
- Optimize updates of maps with identical keys and values.
- E.g. in the example below the original Map will be reused
- as the return of the update.</p>
- <p>
- 1> Map = #{ a => b }. #{ a => b } 2> Map#{ a := b }.</p>
- <p>
- Own Id: OTP-15211 Aux Id: PR-1889 </p>
- </item>
- <item>
- <p>
- Optimize <c>binary:match/2</c> and
- <c>binary:matches/2</c> to use memchr internally.</p>
- <p>
- Own Id: OTP-15238 Aux Id: PR-1803 </p>
- </item>
- <item>
- <p>
- The runtime system used to terminate when a message
- larger than 2 Gb was passed over the distribution. The
- send operation will now instead throw a
- <c>system_limit</c> exeption.</p>
- <p>
- Own Id: OTP-15261</p>
- </item>
- <item>
- <p>
- Change the first module called by erts to be names
- erl_init instead of otp_ring0. systools in sasl have been
- updated to reflect this change.</p>
- <p>
- Own Id: OTP-15336 Aux Id: PR-1825 </p>
- </item>
- <item>
- <p>
- Minor adjustments made to build system for parallel
- configure.</p>
- <p>
- Own Id: OTP-15340 Aux Id: OTP-14625 </p>
- </item>
- <item>
- <p>
- Two new NIF interface functions <c>enif_select_read</c>
- and <c>enif_select_write</c>. They are similar to
- existing <c>enif_select</c> but allow a custom event
- message as argument.</p>
- <p>
- Own Id: OTP-15349 Aux Id: PR-2084 </p>
- </item>
- <item>
- <p>The embedded copy of <c>zlib</c> has been updated from
- <c>1.2.8</c> to <c>1.2.11</c>.</p>
- <p>Note that this copy is only used as a fallback when
- the target platform doesn't provide any <c>zlib</c>
- development libraries. If your system provides
- <c>zlib</c> then it will be used even if it is older than
- <c>1.2.11</c>.</p>
- <p>
- Own Id: OTP-15351 Aux Id: ERL-749 </p>
- </item>
- <item>
- <p>
- New NIF function <c>enif_make_monitor_term</c>.</p>
- <p>
- Own Id: OTP-15362 Aux Id: PR-2127 </p>
- </item>
- <item>
- <p>Appending lists (The ++ operator) will now yield
- properly on large inputs.</p>
- <p>
- Own Id: OTP-15427</p>
- </item>
- <item>
- <p>The <c>length/1</c> BIF used to calculate the length
- of the list in one go without yielding, even if the list
- was very long. In OTP 22, <c>length/1</c> will yield when
- called with a long lists.</p>
- <p>
- Own Id: OTP-15439</p>
- </item>
- <item>
- <p>The transitory emulator option <c>+ztma true</c>
- (introduced in OTP 21.3) has been removed.</p>
- <p>
- Own Id: OTP-15581 Aux Id: OTP-15580 </p>
- </item>
- <item>
- <p>
- The termination behaviour of processes has changed to
- allow processes to yield while sending link exit/monitor
- down signals.</p>
- <p>
- Own Id: OTP-15610</p>
- </item>
- <item>
- <p>
- The dist messages EXIT, EXIT2 and MONITOR_DOWN have been
- updated with new versions that send the reason term as
- part of the payload of the message instead of as part of
- the control message.</p>
- <p>
- The old versions are still present and can be used when
- communicating with nodes that don't support the new
- versions.</p>
- <p>
- Own Id: OTP-15611</p>
- </item>
- <item>
- <p>
- When sending messages, exit, exit2 and monitor down
- distributed signals, the process sending will now yield
- appropriately.</p>
- <p>
- This means that a terminating process will yield and
- possibly be suspended on busy distribution entries while
- they are terminating. This means that any memory held by
- such processes will not be released until after all
- exit/monitor down signals have been sent.</p>
- <p>
- Own Id: OTP-15612</p>
- </item>
- <item>
- <p>
- All external pids/ports/refs created by
- erlang:list_to_pid and similar functions now compare
- equal to any other pid/port/ref with the same number from
- that node.</p>
- <p>
- Before this change they compared differently because the
- node creation of the pid/port/ref did not compare equal
- to any real pid/port/ref creation.</p>
- <p>
- *** POTENTIAL INCOMPATIBILITY ***</p>
- <p>
- Own Id: OTP-15613</p>
- </item>
- <item>
- <p>The <c>iolist_size/1</c> function is now yielding
- which means that an Erlang/OTP system will be responsive
- even if the applications running on the system frequently
- call <c>iolist_size/1</c> with large iolists.</p>
- <p>
- Own Id: OTP-15631</p>
- </item>
- </list>
- </section>
-
-</section>
-
<section><title>Erts 10.2.4</title>
<section><title>Fixed Bugs and Malfunctions</title>