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2015-04-24Merge branch 'egil/opt-float-cmp'Björn-Egil Dahlberg
* egil/opt-float-cmp: erts: Brute force float comparisons as well
2015-04-24Merge branch 'hans/ssh/improve_docs'Hans Nilsson
2015-04-24Merge branch 'ia/ssh/improve_docs'Ingela Anderton Andin
* ia/ssh/improve_docs: ssh: Move code example to Users Guide ssh: Keep dependency info in only one place ssh: Add links ssh: Align to alphabetic order ssh: Change wording to become accurate ssh: Remove extra whitespace ssh: Corrected information about error and event logging ssh: Remove legacy statement ssh: Technically correct description Editorial updates
2015-04-23ssh: Timeout unit and default added to some missing placesHans Nilsson
2015-04-23ssh: Formatting adjustmentsHans Nilsson
Some examples had encountered the space eater.
2015-04-23ssh: Add line about supported kex algorithm(s)Hans Nilsson
2015-04-23ssh: Removed missplaced empty paranthesisHans Nilsson
2015-04-23Merge branch 'maint'Zandra Hird
Conflicts: OTP_VERSION
2015-04-22ssh: Move code example to Users GuideIngela Anderton Andin
2015-04-22ssh: Keep dependency info in only one placeIngela Anderton Andin
2015-04-22ssh: Add linksIngela Anderton Andin
2015-04-22ssh: Align to alphabetic orderIngela Anderton Andin
2015-04-22ssh: Change wording to become accurateIngela Anderton Andin
2015-04-22ssh: Remove extra whitespaceIngela Anderton Andin
2015-04-22ssh: Corrected information about error and event loggingIngela Anderton Andin
Also added some links
2015-04-22ssh: Remove legacy statementIngela Anderton Andin
2015-04-22ssh: Technically correct descriptionIngela Anderton Andin
2015-04-22Editorial updatestmanevik
SSH application
2015-04-22Merge branch 'sverk/pr632/prevent-illegal-nif-terms/OTP-12655'Sverker Eriksson
* sverk/pr632/prevent-illegal-nif-terms/OTP-12655: erts: Reject non-finite float terms in erl_drv_output_term erts: Remove old docs about experimental NIF versions. erts: Add enif_has_pending_exception erts: Clearify erl_nif documentation about badarg exception erts: Fix compile warning in enif_make_double erts: Fix divide by zero compile error in nif_SUITE.c erts: Fix isfinite for windows Ensure NIF term creation disallows illegal values
2015-04-22erts: Brute force float comparisons as wellBjörn-Egil Dahlberg
Increases float comparison speed by ~120%
2015-04-22Updated OTP versionOTP-17.5.2Erlang/OTP
2015-04-22Update release notesErlang/OTP
2015-04-22Merge branch 'hans/ssh/banner_grabbing/OTP-12659' into maint-17Erlang/OTP
* hans/ssh/banner_grabbing/OTP-12659: ssh: added id_string option for server and client
2015-04-22Merge branch 'hans/inets/banner_grabbing/OTP-12661' into maint-17Erlang/OTP
* hans/inets/banner_grabbing/OTP-12661: inets: Add value 'none' in server_tokens config
2015-04-22Update primary bootstrapBjörn Gustavsson
2015-04-22Merge branch 'bjorn/compiler/eprof'Björn Gustavsson
* bjorn/compiler/eprof: v3_life: Optimize updating of the variable data base beam_jump: Replace use of lists:dropwhile/2 with a custom function beam_asm: Eliminate unnecessary use of iolist_to_binary/1 beam_bsm: Optimize btb_index() beam_type: Eliminate redundant calls to checkerror_1/2 erl_expand_records: Simplify handling of call_ext instructions beam_utils: Optimize index_labels_1/2 beam_block: Optimize matching of binary literals Move rewriting of bs_match from beam_clean to beam_z v3_codegen: Reduce cost for fixing up bs_match_string instructions v3_codegen: Optimize "turning" of y registers v3_kernel: Optimize subst_vsub/3 orddict: Eliminate unnecessary consing in store/3 and others compile: Add the {eprof,Pass} option for easy eprof running compile: Eliminate unnecessary wrappers for compiler passes Add z_SUITE to validate loaded code test suite: Always place .core files in data directories test suites: Unload modules compiled from .core or .S compilation_SUITE: Unload tested modules using the code server
2015-04-22v3_life: Optimize updating of the variable data baseBjörn Gustavsson
Updating of the variable data base takes most of the time.
2015-04-22beam_jump: Replace use of lists:dropwhile/2 with a custom functionBjörn Gustavsson
The use of lists:dropwhile/2 is noticeable in the eprof results.
2015-04-22beam_asm: Eliminate unnecessary use of iolist_to_binary/1Björn Gustavsson
2015-04-22beam_bsm: Optimize btb_index()Björn Gustavsson
lists:dropwhile/2 and the fun in btb_index_1/2 shows up in the top 10 list of eprof. Replace dropwhile with a special-purpose function for a tiny increase in speed.
2015-04-22beam_type: Eliminate redundant calls to checkerror_1/2Björn Gustavsson
Profiling shows that the excution time for checkerror_1/2 could be be near the top even for modules without any floating point operations. It turns out that the complexity of simplify_float_1/4 is quadratic. checkerror/1 is called with the growing accumulator for each iteration. checkerror/1 will traverse the entire accumulated list *unless* some floating point operations are used. We can avoid this situation if we only call checkerror/1 when there are live floating point registers. We can also avoid calling flush/3 if there are no live floating point registers.
2015-04-22erl_expand_records: Simplify handling of call_ext instructionsBjörn Gustavsson
The erl_expand_records module have inherited code from sys_pre_expand. We can simplify the code for handling the call_ext instruction to make the code clearer and a smidge faster.
2015-04-22beam_utils: Optimize index_labels_1/2Björn Gustavsson
The execution time for beam_utils:index_labels_1/2 is among the longest in the beam_bool, beam_bsm, beam_receive, and beam_trim compiler passes. Therefore it is worthwhile to do the minor optimization of replacing a call to lists:dropwhile/2 with a special-purpose drop_labels function.
2015-04-22beam_block: Optimize matching of binary literalsBjörn Gustavsson
When matching a binary literal as in: <<"abc">> = Bin the compiler will produce a sequence of three instructions (some details in the instructions removed for simplicity): bs_start_match2 Fail BinReg CtxtReg bs_match_string Fail CtxtReg "abc" bs_test_tail2 Fail CtxtReg 0 The sequence can be replaced with: is_eq_exact Fail BinReg "abc"
2015-04-22Move rewriting of bs_match from beam_clean to beam_zBjörn Gustavsson
The actual bs_match_string instruction has four operands: bs_match_string {f,Lbl} Ctxt NumBits {string,ListOfBytes} However, v3_codegen emits a more compact representation where the bits to match are packaged in a bitstring: bs_match_string {f,Lbl} Ctxt Bitstring Currently, beam_clean:clean_labels/1 will rewrite the compact representation to the final representation. That is unfortunate since clean_labels/1 is called by beam_dead, which means that the less compact representation will be introduced long before it is actually needed by beam_asm. It will also complicate any optimizations that we might want to do. Move the rewriting of bs_match_string from beam_clean:clean_labels/1 to the beam_z pass, which is the last pass executed before beam_validator and beam_asm.
2015-04-22v3_codegen: Reduce cost for fixing up bs_match_string instructionsBjörn Gustavsson
Commit b76588fb5a introduced an optimization of the compile time of huge functions with many bs_match_string instructions. The optimization is done in two passes. The first pass coalesces adjacent bs_match_string instructions. To avoid copying bitstrings multiple times, the bitstrings in the instructions are combined in to a (deep) list. The second pass goes through all instructions in the function and combines the list of bitstrings to a single bitstring in all bs_match_string instructions. The second pass (fix_bs_match_string) is run on all instructions in each function, even if there are no bs_match_instructions in the function. While fix_bs_match_string is not a bottleneck (it is a linear pass), its execution time is noticeable when profiling some modules. Move the execution of the second pass to the select_binary() function so that it will only be executed for instructions that do binary matching. Also take the opportunity to optimize away uses of bs_restore2 that occour directly after a bs_save2. That optimimization is currently done in beam_block, but it can be done essentially for free in the same pass that fixes up bs_match_string instructions.
2015-04-22v3_codegen: Optimize "turning" of y registersBjörn Gustavsson
Profiling shows that the execution time for "turning" y registers is noticeable for some modules (e.g. S1AP-PDU-Contents from the asn1 test suite). We can reduce the impact on running time by special-casing important instructions. In particular, there is no need to look for y registers in the list argument for a select_val instruction.
2015-04-22v3_kernel: Optimize subst_vsub/3Björn Gustavsson
Profiling shows that subst_vsub/3 dominates the running time. It is therefore worthwhile optimizing it.
2015-04-22orddict: Eliminate unnecessary consing in store/3 and othersBjörn Gustavsson
As a minor optimization, eliminate unnecessary cons operations in store/3, append/3, append_list/3, update/4, and update_counter/3.
2015-04-22compile: Add the {eprof,Pass} option for easy eprof runningBjörn Gustavsson
To run eprof for a compiler pass: erlc +'{eprof,beam_asm}' file.erl The name of the compiler pass is the name as printed when 'time' option is used. It is usually, but not always, the module name for the compiler pass.
2015-04-22compile: Eliminate unnecessary wrappers for compiler passesBjörn Gustavsson
Several compiler passes have unnecessary wrapper functions that can be easily eliminated.
2015-04-22Add z_SUITE to validate loaded codeBjörn Gustavsson
If we want to have test cases that run eprof, we must make sure that there are no modules loaded that don't have a working module_info/1 function, since eprof calls module_info(functions) to retrieve the list of functions in the module. Some test cases load modules compiled from Core Erlang that don't have any module_info/1 functions, so we will need make sure that all such modules have been unloaded. Add z_SUITE:loaded/1 to run after all other test cases to verify that all modules that the code server consider loaded are indeed loaded and all have working module_info/0,1 functions.
2015-04-22test suite: Always place .core files in data directoriesBjörn Gustavsson
For tidiness, always place .core files in data directories.
2015-04-22test suites: Unload modules compiled from .core or .SBjörn Gustavsson
The .core or .S files that are compiled in the test cases may lack module_info/0,1 functions, which will cause problems if we (for example) try to run eprof later. To avoid that problem, unload each module directly after testing it.
2015-04-22Merge branch 'hb/hipe/opaque_bugfix/OTP-12666'Hans Bolinder
* hb/hipe/opaque_bugfix/OTP-12666: hipe: Fix a bug in the handling of opaque types
2015-04-22Merge branch 'ia/pr/678/OTP-1267'Ingela Anderton Andin
* ia/pr/678/OTP-1267: Revert "Add workaround for problems with s_client defaults" ssl: Add unit test case ssl: Ignore signature_algorithm (TLS 1.2 extension) sent to TLS 1.0/1 server
2015-04-22Revert "Add workaround for problems with s_client defaults"Ingela Anderton Andin
This reverts commit a3cf4eb4cdd2ce178d81b62faa9f47485fd82331. This workaround is no longer needed as the, TLS-1.2 extension, signature_algorithm is now correctly ignored by previous TLS versions.
2015-04-21Merge branch 'sverk/etp-map'Sverker Eriksson
* sverk/etp-map: erts: Add map support to gdb etp command erts: Add etp_the_non_value
2015-04-21hipe: Fix a bug in the handling of opaque typesHans Bolinder
An opaque type ?opaque(_) was put in a list where #opaque{} was expected.
2015-04-21Merge branch 'mikpe/configure-linux-spelling'Zandra Hird
* mikpe/configure-linux-spelling: erts/configure.in: handle more 'linux' spellings