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2018-03-21Merge pull request #1740 from rickard-green/rickard/signals/OTP-14589Rickard Green
Implementation of true asynchronous signaling between processes
2018-03-21Implementation of true asynchronous signaling between processesRickard Green
Communication between Erlang processes has conceptually always been performed through asynchronous signaling. The runtime system implementation has however previously preformed most operation synchronously. In a system with only one true thread of execution, this is not problematic (often the opposite). In a system with multiple threads of execution (as current runtime system implementation with SMP support) it becomes problematic. This since it often involves locking of structures when updating them which in turn cause resource contention. Utilizing true asynchronous communication often avoids these resource contention issues. The case that triggered this change was contention on the link lock due to frequent updates of the monitor trees during communication with a frequently used server. The signal order delivery guarantees of the language makes it hard to change the implementation of only some signals to use true asynchronous signaling. Therefore the implementations of (almost) all signals have been changed. Currently the following signals have been implemented as true asynchronous signals: - Message signals - Exit signals - Monitor signals - Demonitor signals - Monitor triggered signals (DOWN, CHANGE, etc) - Link signals - Unlink signals - Group leader signals All of the above already defined as asynchronous signals in the language. The implementation of messages signals was quite asynchronous to begin with, but had quite strict delivery constraints due to the ordering guarantees of signals between a pair of processes. The previously used message queue partitioned into two halves has been replaced by a more general signal queue partitioned into three parts that service all kinds of signals. More details regarding the signal queue can be found in comments in the erl_proc_sig_queue.h file. The monitor and link implementations have also been completely replaced in order to fit the new asynchronous signaling implementation as good as possible. More details regarding the new monitor and link implementations can be found in the erl_monitor_link.h file.
2018-03-14Merge branch 'maint'Henrik
Conflicts: OTP_VERSION
2018-03-09Update release notesErlang/OTP
2017-12-13Merge branch 'maint'Henrik Nord
2017-12-08Update release notesErlang/OTP
2017-11-20Merge PR-1632 from margnus1/hipe-receive-opt OTP-14785Sverker Eriksson
HiPE: Optimise receives matching unique references
2017-11-20Merge branch 'lukas/docs/xmllint_fixes/OTP-14721' into maintLukas Larsson
* lukas/docs/xmllint_fixes/OTP-14721: ssl/ssh: Remove/ignore unused XML_FILES doc files Refactor xmllint check and make it fail on failure Add toplevel xmllint make target Conflicts: lib/crypto/doc/src/Makefile
2017-11-16HiPE: Unique ref receive optMagnus Lång
2017-11-09Merge PR-1618 from sverker/sverker/hipe-doc-limitations OTP-14767Sverker Eriksson
Document HiPE limitations
2017-11-06Clearify call trace limitations.Sverker Eriksson
2017-11-03Removed "unused list comprehensions"Sverker Eriksson
which don't seem to be true.
2017-11-02hipe: Add doc sections about limitationsSverker Eriksson
2017-10-31Refactor xmllint check and make it fail on failureLukas Larsson
This commit also adds a check to see that all files that are part of an xi:include also have part of XML_FILES and vice versa. It also fixes any applications where this was not true.
2017-10-10Merge branch 'lars/doc-cleanup/OTP-14475' into maintLars Thorsen
* lars/doc-cleanup/OTP-14475: [edoc] Remove unused module otpsgml_layout.erl Remove unused files from the documentation build
2017-09-28Remove unused files from the documentation buildLars Thorsen
2017-09-22Update release notesErlang/OTP
2017-06-21Prepare releaseErlang/OTP
2017-05-31Revert "Prepare release"Hans Nilsson
This reverts commit eaf8ca41dfa4850437ad270d3897399c9358ced0.
2017-05-30Prepare releaseErlang/OTP
2017-05-05Revert "Prepare release"Raimo Niskanen
This reverts commit dc57404252c47520f352834ad9be45ad684f96c9.
2017-05-04Prepare releaseErlang/OTP
2017-05-04Update copyright yearRaimo Niskanen
2017-03-14Merge branch 'maint'Rickard Green
* maint: Updated OTP version Prepare release Conflicts: OTP_VERSION lib/typer/doc/src/notes.xml lib/typer/vsn.mk
2017-03-14Prepare releaseErlang/OTP
2017-03-13Merge branch 'maint'Rickard Green
* maint: Fix xml warnings in old release notes
2017-03-13Fix xml warnings in old release notesRickard Green
2017-02-14Fixed typos in lib/hipeAndrew Dryga
2016-12-09Prepare releaseErlang/OTP
2016-09-20Prepare releaseErlang/OTP
2016-06-21Prepare releaseErlang/OTP
2016-06-02Revert "Prepare release"Erlang/OTP
This reverts commit e020f75c10410a6943cd055bfa072a2641eab7da.
2016-06-02Prepare releaseErlang/OTP
2016-05-12Revert "Prepare release"Erlang/OTP
This reverts commit bd64ad8e15d66e48b36dbe3584315dd5cfc8b59a.
2016-05-11Prepare releaseErlang/OTP
2016-03-15update copyright-yearHenrik Nord
2016-03-14Prepare releaseErlang/OTP
2015-12-15Update release notesErlang/OTP
2015-11-04[hipe] Correct documentationHans Bolinder
Fix mistakes found by 'xmllint'.
2015-09-21Prepare releaseErlang/OTP
2015-06-23Prepare releaseErlang/OTP
2015-06-18Change license text to APLv2Bruce Yinhe
2015-03-31Prepare releaseErlang/OTP
2014-12-09Prepare releaseErlang/OTP
2014-09-15Update release notesErlang/OTP
2014-06-19Prepare releaseErlang/OTP
2014-06-17doc: Fix broken linksBjörn-Egil Dahlberg
2014-04-07Update release notesErlang/OTP
2013-12-10Merge tag 'OTP_R16B03'Magnus Lidén
The R16B03 release Conflicts: lib/sasl/vsn.mk
2013-12-09Prepare releaseOTP_R16B03Erlang/OTP