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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 The previously used message queue partitioned into two halves has been replaced by a more general signal queue partitioned into three parts that service all kinds of signals.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.
2018-03-20Merge pull request #1744 from uabboli/hasse/stdlib/lists_search/OTP-14675Hans Bolinder
stdlib: Add function lists:search/2
2018-03-13Merge pull request #1743 from richcarl/io-format-multiple-modifiersHans Bolinder
Allow multiple modifier characters in io:format control sequences OTP-14971
2018-03-12Allow multiple modifier characters in io:format control sequencesRichard Carlsson
This makes it possible to print unicode atoms at the same time as suppressing detection of printable lists.
2018-03-09stdlib: Add function lists:search/2Hans Bolinder
This is essentially PR 102, https://github.com/erlang/otp/pull/102. The OTP Technical Board decided to change the name of the function to search/2.
2018-03-09Merge pull request #1735 from richcarl/io_lib-unscan-fixHans Bolinder
Make io_lib:unscan_format/1 work with pad char and default precision OTP-14958
2018-03-08stdlib: Improve io_lib:limit_term/2Hans Bolinder
Improve handling of maps. Addendum to b57e890.
2018-03-02Make io_lib:unscan_format/1 work with pad char and default precisionRichard Carlsson
2018-03-01Merge branch 'maint'Dan Gudmundsson
* maint: ERL-558 Add the missing function clause for string:prefix (#1702)
2018-03-01ERL-558 Add the missing function clause for string:prefix (#1702)Seyed Mirsadeghi
OTP-14942
2018-02-28Merge branch 'peterdmv/stdlib/improve_uri_string_api/OTP-14910'Péter Dimitrov
* peterdmv/stdlib/improve_uri_string_api/OTP-14910: stdlib: Update uri_string documentation (HTML 5.2) stdlib: Improve URI normalization in uri_string Change-Id: I1b85e125ae3bc64e04b04ab884ca603217123167
2018-02-28Merge branch 'maint'John Högberg
* maint: Skip testing unavailable interfaces in inet_SUITE:getifaddrs Make re_SUITE:sub_binaries less unstable
2018-02-27Make re_SUITE:sub_binaries less unstableJohn Högberg
The small sub-binary conversion trick in the GC broke this test pretty often on some machines.
2018-02-23Merge pull request #1723 from jhogberg/john/erts/ets-whereis/OTP-14884John Högberg
Add ets:whereis/1 for resolving table names -> tid()
2018-02-22Merge branch 'raimo/stdlib/rand-polish-stat-tests'Raimo Niskanen
* raimo/stdlib/rand-polish-stat-tests: Decrease tolerance a wee bit Repeat stat tests to only fail for systematic errors Fix histogram and outlier checks
2018-02-22Add ets:whereis/1 for resolving table names -> tid()John Högberg
2018-02-21Decrease tolerance a wee bitRaimo Niskanen
2018-02-21Repeat stat tests to only fail for systematic errorsRaimo Niskanen
2018-02-13Merge branch 'maint-20' into maintSverker Eriksson
* maint-20: Updated OTP version Update release notes Update version numbers erts: Add system_flags(erts_alloc,"+M?sbct *") erts: Add age order first fit allocator strategies erts: Refactor erl_ao_firstfit_alloc erts: Add migration options "acnl" and "acfml" kernel: Add os:cmd/2 with max_size option erts: Add more stats for mbcs_pool erts: Fix alloc_SUITE:migration stdlib: Make ets_SUITE memory check try again erts: Improve carrier pool search erts: Improve alloc_SUITE:migration erts: Refactor carrier dealloc migration
2018-02-12Merge 'sverker/maint-20/alloc-n-migration/ERIERL-88'Sverker Eriksson
into 'sverker/master/alloc-n-migration/ERIERL-88'
2018-02-12Merge 'sverker/maint-19/alloc-n-migration/ERIERL-88'Sverker Eriksson
into 'sverker/maint-20/alloc-n-migration/ERIERL-88' OTP-14915 OTP-14916 OTP-14917 OTP-14918
2018-02-08stdlib: Improve URI normalization in uri_stringPéter Dimitrov
- normalize/1 accepts uri_map() as input type and can return error() if URI parsing fails. - Added normalize/2 that can return a normalized uri_map(). Change-Id: Icdd2e60c15019d3eec2e7bc994cae03066a79194
2018-02-07Merge branch 'hasse/no_get_stacktrace/OTP-14861'Hans Bolinder
* hasse/no_get_stacktrace/OTP-14861: erts: Update abstract format doc with stacktrace variable wx: Do not call erlang:get_stacktrace() tools: Do not call erlang:get_stacktrace() stdlib: Do not call erlang:get_stacktrace() sasl: Do not call erlang:get_stacktrace() runtime_tools: Do not call erlang:get_stacktrace() reltool: Do not call erlang:get_stacktrace() parsetools: Do not call erlang:get_stacktrace() observer: Do not call erlang:get_stacktrace() mnesia: Do not call erlang:get_stacktrace() (cont) mnesia: Do not call erlang:get_stacktrace() kernel: Do not call erlang:get_stacktrace() inets: Do not call erlang:get_stacktrace() eunit: Do not call erlang:get_stacktrace() et: Do not call erlang:get_stacktrace() dialyzer: Do not call erlang:get_stacktrace() debugger: Do not call erlang:get_stacktrace() debugger: Do not try to restore stacktrace common_test: Do not call erlang:get_stacktrace()
2018-02-06stdlib: Do not call erlang:get_stacktrace()Hans Bolinder
2018-02-05Merge branch 'emj/stdlib/tar-repro/PR-1608/OTP-14834'Hans Bolinder
* emj/stdlib/tar-repro/PR-1608/OTP-14834: Add options for creating reproducible tars Return error when unable to make dir
2018-02-02Add options for creating reproducible tarsEric Meadows-Jönsson
2018-01-24Merge branch 'raimo/stdlib/gen-bench-fsm-vs-statem'Raimo Niskanen
* raimo/stdlib/gen-bench-fsm-vs-statem: Dodge divide by zero Introduce gen_statem vs gen_fsm benchmark Remove test suite warning
2018-01-23Merge branch 'maint'Hans Bolinder
* maint: kernel: Correct contracts and a bug in group_history stdlib: Correct contracts dialyzer: Optimize handling of a lot of warnings Conflicts: lib/kernel/src/erl_boot_server.erl
2018-01-22stdlib: Correct contractsHans Bolinder
2018-01-19Dodge divide by zeroRaimo Niskanen
2018-01-17Fix histogram and outlier checksRaimo Niskanen
2018-01-16Introduce gen_statem vs gen_fsm benchmarkRaimo Niskanen
Conflicts: lib/stdlib/test/stdlib_bench_SUITE.erl
2018-01-16Remove test suite warningRaimo Niskanen
2018-01-16Merge branch 'hasse/stdlib/limit_gen_bench'Hans Bolinder
* hasse/stdlib/limit_gen_bench: stdlib: Spend less time in gen_server benchmarks
2018-01-15Merge branch 'maint'Hans Bolinder
* maint: stdlib: Correct a filelib test case stdlib: Let filelib:find_source() search subdirs
2018-01-15stdlib: Spend less time in gen_server benchmarksHans Bolinder
Limit the time used for the benchmarks introduced in b8f16f0.
2018-01-09stdlib: Add check of stacktrace variable to erl_evalHans Bolinder
Some of the functions of the erl_eval module do not call the Erlang code linter, so they need to explicitly check that the newly introduced stacktrace variable is not bound.
2018-01-09stdlib: Improve erl_eval's stacktracesHans Bolinder
The call "erlang:get_stacktrace()" is not handled explicitly. If there are issues, they can probably be ignored since erlang:get_stacktrace/1 will be deprecated and removed.
2018-01-05stdlib: Correct a filelib test caseHans Bolinder
2018-01-05stdlib: Let filelib:find_source() search subdirsHans Bolinder
The Design Principles states that an application can have Erlang source files one level below the "src" directory, and now filelib:find_source() by default searches one level below "src". The same applies to "esrc". That directory is only mentioned in filename(3).
2017-12-21Merge branch 'hasse/stdlib/gen_server_bench'Hans Bolinder
* hasse/stdlib/gen_server_bench: stdlib: Optimize gen a little stdlib: Introduce gen_server benchmark
2017-12-20stdlib: Make ets_SUITE memory check try againSverker Eriksson
as memory stats do not guarantee consistency. A typical ETS test case ends by a lot of deallocating that may now trigger homecoming carrier migration, that in turn can cause quite large inconsistencies in memory stats when same carrier is accounted for twice or not at all. And that's my theory why I now sometimes see transient discrepancies between before and after memory stats.
2017-12-20stdlib: Introduce gen_server benchmarkHans Bolinder
2017-12-19Merge branch 'raimo/stdlib/rand-uniformity'Raimo Niskanen
* raimo/stdlib/rand-uniformity: Tweak statistics limits Improve check on normal distribution tail Test normal distribution
2017-12-08Merge pull request #1634 from bjorng/bjorn/get_stacktrace-syntax/OTP-14692Björn Gustavsson
Add syntax in try/catch to retrieve the stacktrace directly
2017-12-07Merge branch 'hasse/stdlib/base64/OTP-14624'Hans Bolinder
* hasse/stdlib/base64/OTP-14624: stdlib: Add base64 benchmarks stdlib: Do not check base64 input more than needed stdlib: Minor optimization of base64 stdlib: Use binary_to_list in base64 when it is faster stdlib: Optimize base64 functions
2017-11-30stdlib: Add base64 benchmarksHans Bolinder
2017-11-30Remove port subtest in qlc_SUITE:sortJohn Högberg
This subtest revolves around the possibility that the underlying port can be killed, which is nonsense now that the file suite no longer uses ports for anything.
2017-11-30Account for new behavior in tests that touch prim_fileJohn Högberg
This also hides the module behind ?PRIM_FILE to make testing new implementations less painful.
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