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2013-02-13Implement erl_drv_consume_timeslice()Rickard Green
2013-01-25Update copyright yearsBjörn-Egil Dahlberg
2013-01-16Merge branch 'yamt/erl_driver-ssize_t/OTP-10699'Björn-Egil Dahlberg
* yamt/erl_driver-ssize_t/OTP-10699: Use correct way to pull the definition of ssize_t
2013-01-16Use correct way to pull the definition of ssize_tYAMAMOTO Takashi
Necessary for NetBSD with _POSIX_SOURCE at least.
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
2012-12-07Add support for busy port message queueRickard Green
2012-12-03Add erl_drv_[send|output]_termRickard Green
2012-12-03Use ptab functionality also for portsRickard Green
2012-07-19erts: Remove VxWorks from driversBjörn-Egil Dahlberg
2012-03-22Add DTrace support for OS X, Solaris, and Linux (via SystemTap), 1/4Scott Lystig Fritchie
Since it's been quite a while since I've written C code, *and* I haven't done any significant hacking on the VM itself in years, it's quite likely that I haven't done things in 100% proper style. Or my co-collaborators Dustin Sallings (CouchBase) or Michal Ptaszek (Erlang Solutions). My intent for this patch is to start discussion and review of DTrace support for consideration for the R15 release. For additional background on the motivation for this work, please see the slides for the presentation at the Erlang User Conference 2011 in Stockholm: https://www.erlang-factory.com/upload/presentations/462/euc2011-draft2.pdf Changes relative to dtrace-review2 branch: * Fix errors in OTP test suite 'kernel' file_SUITE * Fix errors in OTP test suite 'kernel' prim_file_SUITE * Fix bad pointer bug in efile_drv.c flush_write() * Move the DTrace material from the top of `README.md` into a new file, `README.dtrace.md` Changes since last push to GitHub (relative to commit 5828a4fb28, which was the former `dtrace-review1` branch): * Rebased onto 14 Nov 2011's "master" branch * Recent changes to the async task queuing mechanism means that the async worker queue length is not available. A bogus value of -1 is hard-coded until there's a good way to peek into the new queue structure and find the queue length. * Small fixes based on review comments by Mikael Pettersson, Andrew Thompson, and Andreas Schultz. Add autoconf support: use "./configure --enable-dtrace" on all supported platforms: * OS X Snow Leopard or later * Solaris 10 or OpenSolaris * Linux, via SystemTap's DTrace compatibility packages * FreeBSD 9.0RC1. FreeBSD 8 and earlier do not have support for USDT, DTrace's User-land Statically Defined Tracing. See the file `erts/emulator/beam/erlang_dtrace.d` for the definition of all DTrace probes in the virtual machine so far. Example D scripts can be found in `lib/dtrace/examples`. Note that if you see the error message `{name of probe} does not match any probes`, then there is no Erlang VM process + DTrace probes running. To fix, start a DTrace-enabled VM or remove `-q` from the `dtrace` command line. The `lib/dtrace` directory contains a small code-only OTP application that contains code that allows Erlang code to trigger a DTrace probe. Dynamic creation & deletion of DTrace probes is not currently supported, so the `dtrace:p()` function is hacked to allow a variable number of arguments (up to four integers and up to four strings) to be used. See the comments at the top of `lib/dtrace/src/dtrace.c` for more detail. One feature that may be controversial is the notion I've introduced of a special process dictionary key that can be used by Erlang code to tag I/O operations for an application-specific purpose. Right now, that tag's name is `dtrace_utag`. The dictionary keys used by `sys` and other modules start with a dollar sign. Perhaps there is some convention (but not a dollar sign?) that this tag should use? The purpose of the process dictionary key is to allow the tag to be included in trace messages, e.g. for file I/O, without changing the API of the `file.erl` module's functions. For example, here's a use of the tag when calling the `file:rename/2` function: (bar@sbb2)1> put(dtrace_utag, "GGOOOAAALL!!!!!"). undefined (bar@sbb2)2> dtrace:init(). ok %% Now start both the `user-probe.d` and `efile_drv.d` D scripts %% found in the `lib/dtrace/examples` directory. (bar@sbb2)3> dtrace:p(7, 8, 9, "one", "four"). true %% The output from the `user-probe.d` script: <0.40.0> GGOOOAAALL!!!!! 7 8 9 0 'one' 'four' '' '' (bar@sbb2)4> file:rename("old-name", "new-name"). {error,enoent} %% The output from the `efile_drv.d` script: async I/O pool port #Port<0.59> queue len 1 async I/O pool port #Port<0.59> queue len 0 efile_drv enter tag={1,110} user tag GGOOOAAALL!!!!! | RENAME (12) | args: old-name new-name , 0 0 (port #Port<0.59>) async I/O worker tag={1,110} | RENAME (12) | efile_drv-int_entry async I/O worker tag={1,110} | RENAME (12) | efile_drv-int_return efile_drv return tag={1,110} user tag GGOOOAAALL!!!!! | RENAME (12) | errno 2 I'm not exactly happy with this choice of tagging, namely using `put(dtrace_utag, Tag::list())`. But this is an experiment, so we'll see how it goes. I can't imagine changing the API for all file.erl functions in order pass the tag explicitly. Some modules have some extensive (ab)use of the C preprocessor to reduce the amount of #ifdefs that clutter the code. In several places, I have not #ifdef'ed automatic variables because of clutter. For the same reason, there are a handful of cases where I added DTrace-related members to a struct definition without an #ifdef. I feel that the result is easier to read than earlier drafts where I did use many more `https://github.com/slfritchie/otp/tree/dtrace-experiment+michal2` if you're curious.) I expect there may be some debate about whether the bloat of the affected structs is worthwhile. I erred on adding stuff to structs, especially in the efile_drv.c driver, not having a full grasp on what was thread-safe and what was not ... so I erred on the side of caution. The efile_drv.c has a work-around for a crazy GCC optimization bug. Thank goodness for Google, I dunno how I would've found a work-around for this silly thing. Many thanks to Trond Norbye for writing clearly about the problem in a membase Git repo commit message. /* * A note on probe naming: if "__" appears in a provider probe * definition, then two things happen during compilation: * * 1. The "__" will turn into a hypen, "-", for the probe name. * 2. The "__" will turn into a single underscore, "_", for the * macro names and function definitions that the compiler and * C developers will see. * * We'll try to use the following naming convention. We're a bit * limited because, as a USDT probe, we can only specify the 4th part * of the probe name, e.g. erlang*:::mumble. The 2nd part of the * probe name is always going to be "beam" or "beam.smp", and the 3rd * part of the probe name will always be the name of the function * that's calling the probe. * * So, all probes will be have names defined in this file using the * convention category__name or category__sub_category__name. This * will translate to probe names of category-name or * category-sub_category-name. * * Each of "category", "sub_category", and "name" may have underscores * but may not have hyphens. */ Add tentative support for sequential tracing sending, queueing, and receiving a message. I don't believe I've fully covered all the major places where it would be useful to have the sequential trace token info in a probe -- guidance from the OTP team would be helpful, if there's time to do that kind of review. Add global variable `erts_this_node_sysname`.
2012-01-03erts: Add missing prototype to DRIVER_INITBjörn-Egil Dahlberg
* The DRIVER_INIT macro will now produce an prototype for the driver_init() function in addition to previous behaviour.
2011-12-09Bump driver version to 2.0Raimo Niskanen
2011-12-09erl_driver.h: Enlarge type on return value from callRaimo Niskanen
2011-12-09erl_driver.h: Enlarge types on driver callbacks output, control and callRaimo Niskanen
2011-12-07erl_driver.h: Enlarge types in driver output functionsRaimo Niskanen
2011-12-07erl_driver.h: Enlarge types in driver queue and alloc functionsRaimo Niskanen
2011-12-07erl_driver.h: Use ErlDrvSizeT for size field in ErlIOVecRaimo Niskanen
2011-12-02Iron out bugs in Win64 found in daily buildsPatrik Nyblom
Almost all uses of the 'long' datatype is removed from VM and tests Emulator test now runs w/o drivers crashing Nasty abs bug fixed in VM as well as type errors in allocator debug functions Still one allocator test that fails, domain knowledge is needed to fix that. Fix type inconsistency in beam_load causing crashes
2011-12-02Get cerl and distribution working in Win64Patrik Nyblom
Can still not setup -a, but cerl works.
2011-11-13Use generic lock-free queue for async threadsRickard Green
Queues used for communication between async threads and scheduler threads have been replaced with lock-free queues. Drivers using the driver_async functionality are not automatically locked to the system anymore, and can be unloaded as any dynamically linked in driver. Scheduling of ready async jobs is now also interleaved in between other jobs. Previously all ready async jobs was performed at once.
2011-05-20Update copyright yearsBjörn-Egil Dahlberg
2011-04-26driver_entry: Remove gratuitous paren and fix typoTuncer Ayaz
2011-03-30Remove gratuitous paren in driver_entryTuncer Ayaz
2010-12-15Use new atomic types in emulatorRickard Green
2010-05-05OTP-8581 Revert prototype of driver_asyncPatrik Nyblom
2010-03-10Adopt the new (R13B04) Nif functionality to the halfword codebasePatrik Nyblom
Change erl_int_sizes_config to include HALFWORD_HEAP_EMULATOR, which make it possible for the NIFs to figure out the term size.
2010-03-10Store pointers to heap data in 32-bit wordsPatrik Nyblom
Store Erlang terms in 32-bit entities on the heap, expanding the pointers to 64-bit when needed. This works because all terms are stored on addresses in the 32-bit address range (the 32 most significant bits of pointers to term data are always 0). Introduce a new datatype called UWord (along with its companion SWord), which is an integer having the exact same size as the machine word (a void *), but might be larger than Eterm/Uint. Store code as machine words, as the instructions are pointers to executable code which might reside outside the 32-bit address range. Continuation pointers are stored on the 32-bit stack and hence must point to addresses in the low range, which means that loaded beam code much be placed in the low 32-bit address range (but, as said earlier, the instructions themselves are full words). No Erlang term data can be stored on C stacks (enforced by an earlier commit). This version gives a prompt, but test cases still fail (and dump core). The loader (and emulator loop) has instruction packing disabled. The main issues has been in rewriting loader and actual virtual machine. Subsystems (like distribution) does not work yet.
2010-02-11OTP-8335 Even more NIF featuresSverker Eriksson
2009-11-20The R13B03 release.OTP_R13B03Erlang/OTP