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2011-06-14Improve ethread atomicsRickard Green
The ethread atomics API now also provide double word size atomics. Double word size atomics are implemented using native atomic instructions on x86 (when the cmpxchg8b instruction is available) and on x86_64 (when the cmpxchg16b instruction is available). On other hardware where 32-bit atomics or word size atomics are available, an optimized fallback is used; otherwise, a spinlock, or a mutex based fallback is used. The ethread library now performs runtime tests for presence of hardware features, such as for example SSE2 instructions, instead of requiring this to be determined at compile time. There are now functions implementing each atomic operation with the following implied memory barrier semantics: none, read, write, acquire, release, and full. Some of the operation-barrier combinations aren't especially useful. But instead of filtering useful ones out, and potentially miss a useful one, we implement them all. A much smaller set of functionality for native atomics are required to be implemented than before. More or less only cmpxchg and a membar macro are required to be implemented for each atomic size. Other functions will automatically be constructed from these. It is, of course, often wise to implement more that this if possible from a performance perspective.
2011-03-30Merge branch 'hw/call-chmod-without-f' into devHenrik Nord
* hw/call-chmod-without-f: Call chmod without the "-f" flag Conflicts: erts/emulator/test/Makefile lib/asn1/test/Makefile lib/crypto/test/Makefile lib/debugger/test/Makefile lib/docbuilder/test/Makefile lib/edoc/test/Makefile lib/erl_interface/test/Makefile lib/inviso/test/Makefile lib/parsetools/test/Makefile lib/percept/test/Makefile lib/ssl/test/Makefile lib/syntax_tools/test/Makefile lib/test_server/test/Makefile lib/tools/test/Makefile OTP-9170
2011-03-11Update copyright yearsBjörn-Egil Dahlberg
2011-02-17Rename Suite Callback to Common Test HookLukas Larsson
2011-02-17Update all test specsLukas Larsson
2011-02-17Fix formatting for systemLukas Larsson
2011-02-17Add init_per_suite and end_per_suiteLukas Larsson
2011-02-17Add ts_install_scb to suite/0Lukas Larsson
2011-02-17Update system tests to conform with common_test standardLukas Larsson
2010-12-14Remove unused ethread time functionalityRickard Green
2010-12-03Merge branch 'pan/unicode-filenames/OTP-8887' into devPatrik Nyblom
* pan/unicode-filenames/OTP-8887: (27 commits) Test and correct filelib and filename Add documentation to erlang.xml and slight correction to unicode_usage.xml Add section about Unicode file names to stdlib users guide Correct bug in file_name_SUITE making it fail on Unix instead of Windows7 Add documentation about raw filenames and Unicode file name translation mode Make filelib not crash on re codepoints beyond 255 in re when filename is raw Mend on_load_embedded testcase which did not handle windows links Correct testcase regarding windows versions supporting soft links. Teach filelib to use re in unicode mode when filenames are not raw Treat soft links on Windows correctly in file_name_SUITE Adapt new soft and hard link routines on Windos to Unicode Corrected testcases broken by unicode filenames Update preloaded prim_file Teach prim_file not to accept atoms and not to throw exceptions Adapt inet_drv to Visual Studio 2008 Teach spawn_executable about Unicode Convert filenames read on MacOSX to canonical form Teach file to accept codepoints beyond 255. Add testcases Correct shell utilities to handle unicode and possibly binaries ...
2010-12-01Skip ethread_SUITE:max_threads test on MacOS X LeopardRickard Green
For some reason pthread_create() crashes when more threads cannot be created, instead of returning an error code on our MacOS X Leopard machine...
2010-11-30Teach filelib to use re in unicode mode when filenames are not rawPatrik Nyblom
2010-11-15Call chmod without the "-f" flagHolger Weiß
"-f" is a non-standard chmod option which at least SGI IRIX and HP UX do not support. As the only effect of the "-f" flag is to suppress warning messages, it can be safely omitted.
2010-11-02Merge branch 'sf/erts_de_busy_limit' into devRickard Green
* sf/erts_de_busy_limit: Add flag-based setting for the distribution buffer busy limit
2010-11-02Add flag-based setting for the distribution buffer busy limitScott Lystig Fritchie
Id: OTP-8912 This patch creates a new family of flags with the "+z" prefix. It further creates a new configuration option called "dbbl" (which is the first letter of the name dist_buf_busy_limit). Example usage of this flag would be "+zdbbl 1048576". This patch creates an adjustable buffer limit for the amount of data that may be buffered by the erlang distribution code (in dist.c specifically). Before this patch, this hard-coded constant was used: #define ERTS_DE_BUSY_LIMIT (128*1024) When large binaries are transmitted between nodes (or simply a lot of medium-sized binaries), it is very easy to hit the old 128KB limit. Processes that use the erlang:system_monitor() BIF to monitor system events can be spammed by {monitor, busy_dist_port, ...} message tuples at rates of tens to even hundreds of messages/second. A larger buffer limit will allow processes to buffer more outgoing messages over the distribution. When the buffer limit has been reached, sending processes will be suspended until the buffer size has shrunk. The buffer limit is per distribution channel. A higher limit will give lower latency and higher throughput at the expense of higher memory usage. A variation of this patch has been in commercial production use in at least two companies that the author is aware of. Larger buffer values can reduce the number of {monitor, busy_dist_port, ...} system messages drastically, lower overall messaging latencies, and prevent false timeouts and 'nodedown' messages in extremely busy Mnesia systems. Test suite: there are two tests: a. In erlexec_SUITE.erl to test basic set & get of the value b. In distribution_SUITE.erl, to verify that setting +zdbbl very low will actually change behavior.
2010-10-04erlc: prevent buffer overflowsMichael Santos
Check buffer operations and increase the size of the buffer used for holding command line arguments, since the "-D" switch will be expanded into 3 arguments when passed to erl.
2010-09-10Add testcase for autoimport and the erlang.xml doc consistencyPatrik Nyblom
2010-08-10Rewrite ethread libraryRickard Green
Large parts of the ethread library have been rewritten. The ethread library is an Erlang runtime system internal, portable thread library used by the runtime system itself. Most notable improvement is a reader optimized rwlock implementation which dramatically improve the performance of read-lock/read-unlock operations on multi processor systems by avoiding ping-ponging of the rwlock cache lines. The reader optimized rwlock implementation is used by miscellaneous rwlocks in the runtime system that are known to be read-locked frequently, and can be enabled on ETS tables by passing the `{read_concurrency, true}' option upon table creation. See the documentation of `ets:new/2' for more information. The ethread library can now also use the libatomic_ops library for atomic memory accesses. This makes it possible for the Erlang runtime system to utilize optimized atomic operations on more platforms than before. Use the `--with-libatomic_ops=PATH' configure command line argument when specifying where the libatomic_ops installation is located. The libatomic_ops library can be downloaded from: http://www.hpl.hp.com/research/linux/atomic_ops/ The changed API of the ethread library has also caused modifications in the Erlang runtime system. Preparations for the to come "delayed deallocation" feature has also been done since it depends on the ethread library. Note: When building for x86, the ethread library will now use instructions that first appeared on the pentium 4 processor. If you want the runtime system to be compatible with older processors (back to 486) you need to pass the `--enable-ethread-pre-pentium4-compatibility' configure command line argument when configuring the system.
2010-05-02Merge branch 'bg/remove-stray-ose-support' into devErlang/OTP
* bg/remove-stray-ose-support: configure: Remove stray OSE/Delta support Makefiles: Remove stray OSE/Delta support kernel tests: Remove stray OSE/Delta support system tests: Remove stray OSE/Delta support erl_interface tests: Remove stray OSE/Delta support epmd: Remove stray OSE/Delta support epmd: #ifdef out start_epmd() for other platforms than VxWorks emulator tests: Remove stray OSE/Delta support emulator: Remove stray OSE/Delta support emulator: Eliminate #ifdef for sys_tty_reset() test_server: Remove stray support for OSE/Delta OTP-8585 bg/remove-stray-ose-support
2010-04-30system tests: Remove stray OSE/Delta supportBjörn Gustavsson
2010-02-11OTP-8323 Cross compilation improvements and other build systemRickard Green
improvements. Most notable: Lots of cross compilation improvements. The old cross compilation support was more or less non-existing as well as broken. Please, note that the cross compilation support should still be considered as experimental. Also note that old cross compilation configurations cannot be used without modifications. For more information on cross compiling Erlang/OTP see the $ERL_TOP/xcomp/README file. Support for staged install using <url href="http://www.gnu.org/prep/standards/html_node/DESTDIR.html">D ESTDIR</url>. The old broken INSTALL_PREFIX has also been fixed. For more information see the $ERL_TOP/README file. Documentation of the release target of the top Makefile. For more information see the $ERL_TOP/README file. make install now by default creates relative symbolic links instead of absolute ones. For more information see the $ERL_TOP/README file. $ERL_TOP/configure --help=recursive now works and prints help for all applications with configure scripts. Doing make install, or make release directly after make all no longer triggers miscellaneous rebuilds. Existing bootstrap system is now used when doing make install, or make release without a preceding make all. The crypto and ssl applications use the same runtime library path when dynamically linking against libssl.so and libcrypto.so. The runtime library search path has also been extended. The configure scripts of erl_interface and odbc now search for thread libraries and thread library quirks the same way as erts do. The configure script of the odbc application now also looks for odbc libraries in lib64 and lib/64 directories when building on a 64-bit system. The config.h.in file in the erl_interface application is now automatically generated in instead of statically updated which reduces the risk of configure tests without any effect. (Thanks to Henrik Riomar and Winston Smith for testing)
2010-02-03OTP-8323 Cross compilation improvements and other build systemRickard Green
improvements. Most notable: Lots of cross compilation improvements. The old cross compilation support was more or less non-existing as well as broken. Please, note that the cross compilation support should still be considered as experimental. Also note that old cross compilation configurations cannot be used without modifications. For more information on cross compiling Erlang/OTP see the $ERL_TOP/xcomp/README file. Support for staged install using <url href="http://www.gnu.org/prep/standards/html_node/DESTDIR.html">D ESTDIR</url>. The old broken INSTALL_PREFIX has also been fixed. For more information see the $ERL_TOP/README file. Documentation of the release target of the top Makefile. For more information see the $ERL_TOP/README file. make install now by default creates relative symbolic links instead of absolute ones. For more information see the $ERL_TOP/README file. $ERL_TOP/configure --help=recursive now works and prints help for all applications with configure scripts. Doing make install, or make release directly after make all no longer triggers miscellaneous rebuilds. Existing bootstrap system is now used when doing make install, or make release without a preceding make all. The crypto and ssl applications use the same runtime library path when dynamically linking against libssl.so and libcrypto.so. The runtime library search path has also been extended. The configure scripts of erl_interface and odbc now search for thread libraries and thread library quirks the same way as erts do. The configure script of the odbc application now also looks for odbc libraries in lib64 and lib/64 directories when building on a 64-bit system. The config.h.in file in the erl_interface application is now automatically generated in instead of statically updated which reduces the risk of configure tests without any effect.
2010-01-22Merge branch 'bg/avoid-etop-in-include' into ccase/r13b04_devErlang/OTP
* bg/avoid-etop-in-include: epmd tests: fix build of test suites on Windows system test: fix build of test suites on Windows
2010-01-20system test: fix build of test suites on WindowsBjörn Gustavsson
On Windows, the ERL_TOP environment variable contains a path that only is valid for cygwin-enabled programs, such as 'make'. It is not meaningful to pass the value of $ERL_TOP in the -I option to the Erlang compiler, because the Erlang emulator does not interpret cygwin paths correctly. Therefore, -include("test_server.hrl") will fail to find test_server.hrl. Work around the problem by using -include_lib().
2010-01-20Merge branch 'cf/compile_warning_as_error' into ccase/r13b04_devErlang/OTP
* cf/compile_warning_as_error: Add option -Werror in erlc(1) compile: add flag warnings_as_errors to treat warnings as errors compile.erl: remove trailing whitespace OTP-8382 The -Werror option for erlc and the compiler option warnings_as_errors will cause warnings to be treated as errors. (Thanks to Christopher Faulet.)
2010-01-19Add option -Werror in erlc(1)Christopher Faulet
Like in gcc, this option treats warnings as errors.
2009-12-01erlc_SUITE: Handle new formatting of warningsBjörn Gustavsson
The MIB compiler in the snmp applications formats its warnings slightly differently, so we'll need to update the regexp that should match the expected output.
2009-11-20The R13B03 release.OTP_R13B03Erlang/OTP