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2013-08-29add erl option to set schedulers by percentagesSteve Vinoski
For applications where measurements show enhanced performance from the use of a non-default number of emulator scheduler threads, having to accurately set the right number of scheduler threads across multiple hosts each with different numbers of logical processors is difficult because the erl +S option requires absolute numbers of scheduler threads and scheduler threads online to be specified. To address this issue, add a +SP option to erl, similar to the existing +S option but allowing the number of scheduler threads and scheduler threads online to be set as percentages of logical processors configured and logical processors available, respectively. For example, "+SP 50:25" sets the number of scheduler threads to 50% of the logical processors configured, and the number of scheduler threads online to 25% of the logical processors available. The +SP option also interacts with any settings specified with the +S option, such that the combination of options "+S 4:4 +SP 50:50" (in either order) results in 2 scheduler threads and 2 scheduler threads online. Add documentation for the +SP option. Add tests for the +SP option to scheduler_SUITE. Add tests and documentation for two existing features of the +S option: +S 0:0 resets the scheduler thread count and scheduler threads online count to their defaults, and specifying negative numbers for +S results in those values being subtracted from the default values for the host.
2013-06-11erts: Add the +sfwi system flagRickard Green
+sfwi Interval Set scheduler forced wakeup interval. All run queues will be scanned each Interval milliseconds. While there are sleeping schedulers in the system, one scheduler will be woken for each non-empty run queue found. An Interval of zero disables this feature, which also is the default. This feature has been introduced as a temporary workaround for lengthy executing native code, and native code that do not bump reductions properly in OTP. When these bugs have be fixed the +sfwi flag will be removed.
2013-05-30Merge branch 'rickard/ptab-id-alloc/OTP-11077' into maintRickard Green
* rickard/ptab-id-alloc/OTP-11077: Introduce a better id allocation algorithm for PTabs
2013-05-17Introduce a better id allocation algorithm for PTabsRickard Green
2013-04-17Add documentation of w, i and e addition to +fnu and +fna switches to erlSiri Hansen
These were documented in the stdlib user's guide, but not in the reference manual for erl. This has now been corrected.
2013-04-05Merge branch 'maint-r16' into maintPatrik Nyblom
Conflicts: erts/vsn.mk
2013-04-03Be less eager requesting wakeup for cleanup jobsRickard Green
2013-03-18Set unique anchor on +pc flag in erl.xmlPatrik Nyblom
2013-02-25Set default max ports on win32 to 8192Lukas Larsson
2013-02-22Merge branch 'pan/unicode_printable_ranges'Patrik Nyblom
* pan/unicode_printable_ranges: Adapt stdlib tests to ~tp detecting latin1 binaries Update primary bootstrap Make wx debugger use +pc flag when applicable Correct misspelled comments and space at lin ends Make ~tp output latin1 binaries as strings if possible Leave the +pc handling to io and io_lib_pretty Remove newly introduced warning in erlexec.c Make shell_SUITE:otp_10302 use +pc unicode when needed Fix io_proto_SUITE to handle the new io_lib_pretty:print Add testcase for +pc and io:printable_range/0 Make printing of UTF-8 in binaries behave like lists. Document +pc flag and io:printable_range/0 Add usage of and spec for io:printable_range/0 Add +pc {latin1|unicode} switch and io:printable_range/0 Fix some Unicode issues OTP-18084
2013-02-20Changed documentation for +sws optionFredrik Gustafsson
2013-02-18Document +pc flag and io:printable_range/0Patrik Nyblom
2013-01-25Update copyright yearsBjörn-Egil Dahlberg
2013-01-23Merge branch 'rickard/rg-default/OTP-10737'Rickard Green
* rickard/rg-default/OTP-10737: Raise default reader group limit to 64
2013-01-23Merge branch 'rickard/r16/port-optimizations/OTP-10336'Rickard Green
* rickard/r16/port-optimizations/OTP-10336: Bump reductions also for immediate driver calls Add 'port_count' and 'port_limit' to system_info/1 spec Fix documentation Replace use of deprecated functions in test cases Replace use of driver_send_term() with erl_drv_send_term() Conflicts: erts/preloaded/ebin/erlang.beam
2013-01-23Merge branch 'rickard/async-default/OTP-10736'Rickard Green
* rickard/async-default/OTP-10736: Use async threads by default
2013-01-23Merge branch 'rickard/+stbt/OTP-10668'Rickard Green
* rickard/+stbt/OTP-10668: Add +stbt erl command line switch
2013-01-21Raise default reader group limit to 64Rickard Green
2013-01-21Use async threads by defaultRickard Green
2013-01-08Add +stbt erl command line switchRickard Green
2012-12-20Fix documentationRickard Green
2012-12-07Merge branch 'rickard/port-optimizations/OTP-10336' into ↵Rickard Green
rickard/r16/port-optimizations/OTP-10336 * rickard/port-optimizations/OTP-10336: Change annotate level for emacs-22 in cerl Update etp-commands Add documentation on communication in Erlang Add support for busy port message queue Add driver callback epilogue Implement true asynchronous signaling between processes and ports Add erl_drv_[send|output]_term Move busy port flag Use rwlock for driver list Optimize management of port tasks Improve configuration of process and port tables Remove R9 compatibility features Use ptab functionality also for ports Prepare for use of ptab functionality also for ports Atomic port state Generalize process table implementation Implement functionality for delaying thread progress from unmanaged threads Conflicts: erts/doc/src/erl_driver.xml erts/doc/src/erlang.xml erts/emulator/beam/beam_bif_load.c erts/emulator/beam/beam_bp.c erts/emulator/beam/beam_emu.c erts/emulator/beam/bif.c erts/emulator/beam/copy.c erts/emulator/beam/erl_alloc.c erts/emulator/beam/erl_alloc.types erts/emulator/beam/erl_bif_info.c erts/emulator/beam/erl_bif_port.c erts/emulator/beam/erl_bif_trace.c erts/emulator/beam/erl_init.c erts/emulator/beam/erl_message.c erts/emulator/beam/erl_port_task.c erts/emulator/beam/erl_process.c erts/emulator/beam/erl_process.h erts/emulator/beam/erl_process_lock.c erts/emulator/beam/erl_trace.c erts/emulator/beam/export.h erts/emulator/beam/global.h erts/emulator/beam/io.c erts/emulator/sys/unix/sys.c erts/emulator/sys/vxworks/sys.c erts/emulator/test/port_SUITE.erl erts/etc/unix/cerl.src erts/preloaded/ebin/erlang.beam erts/preloaded/ebin/prim_inet.beam erts/preloaded/src/prim_inet.erl lib/hipe/cerl/erl_bif_types.erl lib/kernel/doc/src/inet.xml lib/kernel/src/inet.erl
2012-12-07Implement true asynchronous signaling between processes and portsRickard Green
2012-12-03Improve configuration of process and port tablesRickard Green
2012-10-24Merge branch 'maint'Björn-Egil Dahlberg
Conflicts: erts/etc/common/heart.c
2012-10-18doc: Document ERL_CRASH_DUMP_SECONDS behaviourBjörn-Egil Dahlberg
* heart reboot behaviour * erl_crash.dump file write behaviour
2012-08-31Merge branch 'maint'Björn-Egil Dahlberg
Conflicts: lib/diameter/autoconf/vxworks/sed.general xcomp/README.md
2012-08-31Update copyright yearsBjörn-Egil Dahlberg
2012-08-20Merge branch 'maint'Patrik Nyblom
Conflicts: erts/doc/src/erlang.xml erts/preloaded/ebin/init.beam lib/kernel/doc/src/os.xml lib/stdlib/test/filename_SUITE.erl
2012-08-14Add documetation about Unicode in environmentPatrik Nyblom
2012-06-04Merge branch 'maint'Lukas Larsson
* maint: Remove stale code for hybrid heap and incremental GC Remove the hipe_bifs:show_message_area/0 BIF Remove support for erlang:system_info(global_heaps_size) Remove the erlang:garbage_collect_message_area/0 BIF Remove workarounds for hybrid and shared heaps in test suites Conflicts: erts/doc/src/erlang.xml erts/emulator/beam/erl_message.c erts/emulator/beam/erl_process.c erts/emulator/beam/erl_process.h erts/emulator/hipe/hipe_bif2.tab lib/hipe/cerl/erl_bif_types.erl
2012-05-10Remove stale code for hybrid heap and incremental GCBjörn Gustavsson
The hybrid heap emulator was last working in the non-SMP R11B run-time system. When the constant pools were introduced in R12B, the hybrid heap emulator was not updated to handle them. At this point, the harm from reduced readability of the code is greater than any potential usefulness of keeping the code.
2012-04-27Merge branch 'maint'Sverker Eriksson
Conflicts: erts/emulator/beam/erl_process.c
2012-04-25Merge branch 'rickard/sched-busy-wait/OTP-10044' into maint-r15Erlang/OTP
* rickard/sched-busy-wait/OTP-10044: Add switch controlling scheduler busy wait Conflicts: erts/emulator/beam/erl_process.c erts/emulator/beam/erl_process.h
2012-04-23Merge branch 'rickard/sched-wakeup-other/OTP-10033' into ↵Rickard Green
rickard/sched-wakeup-other-r15b01/OTP-10033 Conflicts: erts/emulator/beam/erl_process.c erts/vsn.mk
2012-04-23Add switch controlling scheduler busy waitRickard Green
2012-04-23Implement proposal for new scheduler wakeup strategyRickard Green
2012-04-16Optimize process table accessRickard Green
2011-12-05Fix typos in erl(1)Tuncer Ayaz
2011-12-01Merge branch 'rickard/deprecate-runtime-binding/OTP-9749'Rickard Green
* rickard/deprecate-runtime-binding/OTP-9749: Deprecate erlang:system_flag/2 arguments scheduler_bind_type and cpu_topology
2011-12-01Deprecate erlang:system_flag/2 arguments scheduler_bind_type and cpu_topologyRickard Green
The use of erlang:system_flag(scheduler_bind_type, _) and erlang:system_flag(cpu_topology, _) have been deprecated and scheduled for removal in erts-5.10/OTP-R16. For more information see the documentation of erlang:system_flag/2.
2011-11-30Merge branch 'rickard/default-unbound/OTP-9726'Rickard Green
* rickard/default-unbound/OTP-9726: Use unbound schedulers as default
2011-11-18Use unbound schedulers as defaultRickard Green
As of ERTS version 5.9 (OTP-R15B) the runtime system will by default not bind schedulers to logical processors. If the Erlang runtime system is the only operating system process that binds threads to logical processors, this improves the performance of the runtime system. However, if other operating system processes (as for example another Erlang runtime system) also bind threads to logical processors, there might be a performance penalty instead. In some cases this performance penalty might be severe. Due to this, we change the default so that the user must make an active decision in order to bind schedulers.
2011-11-18Merge branch 'rickard/sched-compact-load/OTP-9695'Rickard Green
* rickard/sched-compact-load/OTP-9695: Add switch that can disable scheduler compaction of load
2011-11-15Add switch that can disable scheduler compaction of loadRickard Green
2011-10-17Correct the docsHans Bolinder
2011-08-18erl: Add +L to suppress loading of line number informationBjörn Gustavsson
2011-06-01Fix typos in the epmd documentationHolger Weiß
2011-04-08Merge branch 'hw/epmd-bind-to-address' into devHenrik Nord
* hw/epmd-bind-to-address: Allow user to specify the IP address epmd binds to OTP-9213
2011-04-04Merge branch 'gl/erts-doterlang-docs' into devHenrik Nord
* gl/erts-doterlang-docs: Add back documentation on .erlang processing OTP-9189
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