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2018-03-22Fix signal order for is_process_aliveRickard Green
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 The previously used message queue partitioned into two halves has been replaced by a more general signal queue partitioned into three parts that service all kinds of signals.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.
2018-02-12Merge '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
2017-12-20erts: Add more stats for mbcs_poolSverker Eriksson
similar to the ones in OTP-19.2.3.1
2017-12-19Redirect system_flag(scheduler_wall_time,_) to kernel_refcRickard Green
2017-11-20Merge branch 'lukas/stdlib/maps_iterators/OTP-14012'Lukas Larsson
* lukas/stdlib/maps_iterators/OTP-14012: erts: Limit size of first iterator for hashmaps Update primary bootstrap Update preloaded modules erts: Remove erts_internal:maps_to_list/2 stdlib: Make io_lib and io_lib_pretty use maps iterator erts: Implement batching maps:iterator erts: Implement maps path iterator erts: Implement map iterator using a stack stdlib: Introduce maps iterator API Conflicts: bootstrap/lib/stdlib/ebin/io_lib.beam bootstrap/lib/stdlib/ebin/io_lib_pretty.beam erts/emulator/beam/bif.tab erts/preloaded/ebin/erlang.beam erts/preloaded/ebin/erts_internal.beam erts/preloaded/ebin/zlib.beam
2017-11-20Update preloaded modulesLukas Larsson
2017-11-15Move new|abort_connection_id to erts_internalSverker Eriksson
and drop _id suffix.
2017-11-15fix erlang specs and preloadedSverker Eriksson
2017-10-12Merge branch 'rickard/null-chars/ERL-370/OTP-14543'Rickard Green
* rickard/null-chars/ERL-370/OTP-14543: Don't allow null chars in various strings Conflicts: erts/emulator/beam/erl_alloc.types erts/preloaded/ebin/erlang.beam
2017-10-11Don't allow null chars in various stringsRickard Green
Various places that now reject null chars inside strings - Primitive file operations reject it in filenames. - Primitive environment variable operations reject it in names and values. - os:cmd() reject it in its input. Also '=' characters are rejected by primitive environment variable operations in environment variable names. Documentation has been updated to document null characters in these types of data as invalid. Currently these operations accept null chars at the end of strings, but that will change in the future.
2017-10-02erts: Update +IOt and msacc docsLukas Larsson
2017-09-06Merge branch 'maint' into john/erts/merge-zlib-and-vector-qJohn Högberg
2017-09-05erts: Add erlang:iolist_to_iovecLukas Larsson
OTP-14520
2017-08-28Merge branch 'rickard/dist/OTP-14459' into rickard/dist/master/OTP-14459Rickard Green
Conflicts: erts/emulator/beam/bif.c erts/emulator/beam/dist.c erts/emulator/beam/dist.h erts/emulator/beam/erl_bif_info.c erts/emulator/beam/erl_node_tables.c erts/emulator/beam/erl_node_tables.h erts/emulator/beam/external.c
2017-08-28Support for distribution controller processesRickard Green
2017-06-20Update preloaded modulesHans Nilsson
2017-06-14Update preloaded modulesRickard Green
2017-05-19Make statistics/1 aware of dirty run-queues and tasksRickard Green
2017-05-04Update preloaded modulesBjörn Gustavsson
2017-04-25Update preloaded modulesLukas Larsson
2017-04-10Update preloaded modulesLukas Larsson
2017-03-22list_to_ref/1Rickard Green
2017-03-10Update preloaded modulesRickard Green
2017-02-17Teach make_preload to handle the new 'AtU8' chunkBjörn Gustavsson
26b59dfe67 introduced the new 'AtU8' chunk to support Unicode atoms. make_preload strips the pre-loaded BEAM files so that they only contain essential chunks. It expects to find the old 'Atom' chunk. Teach make_preload to read the new 'AtU8' chunk instead of the old chunk. Also produce a nice error message if someone by mistake compiles the pre-loaded modules with an OTP 19 compiler.
2017-02-06Use magic refs for code loading stateRickard Green
2017-01-17Scheduler wall time support for dirty schedulersRickard Green
2017-01-12Perform potentially long GC on dirty schedulers if availableRickard Green
2016-12-20Update preloaded modulesLukas Larsson
2016-12-07Update preloaded modulesErlang/OTP
2016-11-26Update preloaded modulesBjörn Gustavsson
2016-11-02Merge branch 'maint'Hans Bolinder
* maint: Update preloaded erts: Correct type declaration of match specification head Conflicts: erts/preloaded/ebin/erlang.beam erts/preloaded/ebin/erts_internal.beam
2016-11-01Update preloadedHans Bolinder
2016-09-06Update preloadedLukas Larsson
2016-09-05Implement the new ceil/1 and floor/1 guard BIFsBjörn Gustavsson
Implement as ceil/1 and floor/1 as new guard BIFs (essentially part of Erlang language). They are guard BIFs because trunc/1 is a guard BIF. It would be strange to have trunc/1 as a part of the language, but not ceil/1 and floor/1.
2016-08-25Replace misspelled symbolic time unitsRickard Green
Besides using two words for 'milliseconds' et. al. they are also changed from plural to singular.
2016-06-20Update preloaded modulesHenrik Nord
2016-05-27Update preloadedSverker Eriksson
2016-05-25erts: Update preloadedSverker Eriksson
2016-05-10Update preloaded modulesLukas Larsson
2016-05-03Update preloaded modulesBjörn-Egil Dahlberg
2016-04-15Update preloaded modulesLukas Larsson
2016-04-07Update preloaded erlang.beamBjörn-Egil Dahlberg
2016-03-10Improved scheduler suspend functionalityRickard Green
- The calling process is now suspended while synchronizing scheduler suspends via erlang:system_flag(schedulers_online, _) and erlang:system_flag(multi_scheduling, _), instead of blocking the scheduler thread in the BIF call waiting for the operation to synchronize. Besides releasing the scheduler for other work (or immediate suspend) it also makes it possible to abort the operation by killing the process. - erlang:system_flag(schedulers_online, _) now only wait for normal schedulers to complete before it returns. This since it may take a very long time before all dirty schedulers suspends. - erlang:system_flag(multi_scheduling, block_normal|unblock_normal) which only operate on normal schedulers has been introduced. This since there are use cases where suspend of dirty schedulers are not of interest (hipe loader). - erlang:system_flag(multi_scheduling, block) still blocks all dirty schedulers as well as all normal schedulers except one since it is hard to redefine what multi scheduling block means. - The three operations: - changing amount of schedulers online - blocking/unblocking normal multi scheduling - blocking/unblocking full multi scheduling can now be done in parallel. This is important since otherwise a full multi scheduling block would potentially delay the other operations for a very long time.
2016-02-25Update preloaded modulesBjörn Gustavsson
2016-02-17Update preloaded modulesHans Bolinder
2016-02-02Update preloaded modulesLukas Larsson
2016-02-02Merge branch 'maint'Rickard Green
* maint: Introduce time management in native APIs Introduce time warp safe replacement for safe_fixed option Introduce time warp safe trace timestamp formats Conflicts: erts/emulator/beam/erl_bif_trace.c erts/emulator/beam/erl_driver.h erts/emulator/beam/erl_nif.h erts/emulator/beam/erl_trace.c erts/preloaded/ebin/erlang.beam
2016-01-26Update preloaded modulesLukas Larsson