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2010-02-11OTP-8335 Even more NIF featuresSverker Eriksson
2010-01-22OTP-8386 Immediately repeated multi-scheduling block/unblock cycles usingRickard Green
erlang:system_flag(multi_scheduling, block | unblock) could deadlock the runtime system.
2010-01-18Fix annoying failing statistics_SUITE test casesBjörn Gustavsson
In an SMP emulator, two of the test cases in statistics_SUITE frequently fail. Remove the runtime_zero_update/1 test case, because you can't really expect an SMP emulator not to spend any CPU time at all even if no Erlang process is active. Adjust the runtime_update/1 test case to not fail if the measured times are note close enough. It will still fail if statistics(runtime) would fail or return the wrong type.
2010-01-15Merge branch 'egil/binary-gc' into ccase/r13b04_devErlang/OTP
* egil/binary-gc: Add documentation for binary heap size settings. Add tracing capabilities for binary virtual heap Add min heap size start options to beam and erl Improve binary garbage collection OTP-8370 The default settings for garbage collection of binaries has been adjusted to be less aggressive than in R13B03. It is now also possible configure the settings for binary GC. See the documentation for spawn_opt/2-5, erlang:system_info/1, erlang:system_flag/2, process_flag/2-3, erlang:trace/3, and the documenation for erl for the new command line options +hms and +hmbs.
2010-01-13Improve binary garbage collectionBjörn-Egil Dahlberg
The garbage collector in r13b03 is too aggressive in some cases. This commit raises the level of default initial allowed binary garbage (virtual heap for binaries) before collecting from 233 words to 46368 words (181 kB on 32-bit). A new option, min_bin_vheap_size, has been added to spawn_opt, system_flag and process_flag can be used to change the default values. The option can also be used with system_info and process_info to inspect the values. For symmetry the option min_heap_size has been added to the above functions where it was previously missing. Add testcases for min_bin_vheap_size and min_heap_size for functions process_flag/2, process_info/2, system_info/2 and spawn_opt/2.
2010-01-13OTP-8240 Improved GC performance after BIF/NIF call when a lot of heapSverker Eriksson
fragments was created. This will mainly benefit NIFs that return large compound terms.
2010-01-12Merge branch 'jv/binary_to_term-opts' into ccase/r13b04_devErlang/OTP
* jv/binary_to_term-opts: document ErtsExternalDist flags and CON_ID mask add options to binary_to_term OTP-8367 There is new erlang:binary_to_binary/2 BIF that takes an option list. The option safe can be used to prevent creation of resources that are not garbage collected (such as atoms). (Thanks to Jayson Vantuyl.)
2010-01-08add options to binary_to_termJayson Vantuyl
term_to_binary and binary_to_term are powerful tools that can be used easily in lieu of a custom binary network protocol. Unfortunately, carefully crafted data can be used to exhaust the memory in an Erlang node by merely attempting to decode binaries. This makes it unsafe to receive data from untrusted sources. This is possible because binary_to_term/1 will allocate new atoms and new external function references. These data structures are not garbage collected. This patch implements the new form of binary_to_term that takes a list of options, and a simple option called 'safe'. If specified, this option will cause decoding to fail with a badarg error if an atom or external function reference would be allocated. In the general case, it will happily decode any Erlang term other than those containing new atoms or new external function references. However, fun, pid, and ref data types can embed atoms. They might fail to decode if one of these embedded atoms is new to the node. This may be an issue if encoded binaries are transferred between nodes or persisted between invocations of Erlang.
2009-12-09OTP-8304 Incompatible changes in the experimental NIF feature. Changed theSverker Eriksson
NIF function prototypes in order to allow more than 3 function arguments. Also an incompatible change in the return value of erlang:load_nif/2. Added support for references, floats and term comparison in NIFs. Read more in the documentation of erl_nif and erlang:load_nif/2.
2009-12-09OTP-8304 Incompatible changes in the experimental NIF feature. Changed theSverker Eriksson
NIF function prototypes in order to allow more than 3 function arguments. Also an incompatible change in the return value of erlang:load_nif/2. Added support for references, floats and term comparison in NIFs. Read more in the documentation of erl_nif and erlang:load_nif/2.
2009-11-20The R13B03 release.OTP_R13B03Erlang/OTP