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* jf/run_erl-disable-flow-control:
Teach run_erl RUN_ERL_DISABLE_FLOWCNTRL for disabling flow control
OTP-9270
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Conflicts:
erts/vsn.mk
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Flow control can cause unwanted behaviour of the beam process,
if accidentally hit Ctrl-S (instead of Ctrl-D to detach) the
entire beam may be blocked.
Fix this problem by making it possible to turn off flow
control by setting the environment variable RUN_ERL_DISABLE_FLOWCNTRL.
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* ta/driver_entry-typo:
driver_entry: Remove gratuitous paren and fix typo
OTP-9254
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* sverker/enif_is_exception/OTP-9150:
add support for checking if an ERL_NIF_TERM is an exception
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Conflicts:
erts/vsn.mk
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* bjorn/erts/remove-init_get_args-doc/OTP-9209:
Remove documentation for non-existent init:get_args/0
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init:get_args/0 was deprecated in R9C and removed in R12B.
Reported-by: Eric Pailleau
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* hw/epmd-bind-to-address:
Allow user to specify the IP address epmd binds to
OTP-9213
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* ta/driver_entry-typos-re:
Remove gratuitous paren in driver_entry
OTP-9192
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* gl/erts-doterlang-docs:
Add back documentation on .erlang processing
OTP-9189
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Add the enif_is_exception function to allow callers to determine
whether an ERL_NIF_TERM represents an exception. (Currently the only
supported exception is badarg since only enif_make_badarg exists, but
this will likely be expanded in future releases.) This allows NIF code
to call other NIF functions that return ERL_NIF_TERM and properly
check to see if the returned terms are exceptions. Without the
enif_is_exception function, developers have to create their own means
of checking whether a function creates an exception, such as returning
boolean success/failure indicators or some other special value
indicating that an exception is in effect.
The declaration of enif_is_exception in erl_nif_api_funcs.h respects
the order of declarations required to keep compatibility on Windows.
Add a new test to verify the operation of enif_is_exception.
Modify the erl_nif man page to add a description of enif_is_exception
and also to clarify the requirements of calling the enif_make_badarg
function. If code calls enif_make_badarg, the env passed in gets set
with exception information and so the return value of the calling
function MUST be the badarg term returned from enif_make_badarg. Also
clarify that the result of enif_make_badarg may be passed only to
enif_is_exception and not to any other NIF API functions.
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* sverker/clarify_nif_resource_doc:
clarify NIF resource object deallocation documentation
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In the erl_nif documentation, clarify how and when NIF resource
objects can be deallocated. Specifically, add focus for the case of
calling enif_release_resource immediately after obtaining a resource
term from enif_make_resource, since this is likely to be a common
approach NIFs use to manage resources.
Also fix a couple misspellings in the erl_nif documentation.
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* ks/process_status:
Document exiting and garbage_collecting process statuses
OTP-9102
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* hw/erl-clarify-detached-doc:
Mention that "-detached" implies "-noinput"
OTP-9086
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* ta/driver-entry-typos:
Fix a couple typos in driver_entry(3)
OTP-9085
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* sverker/driver_SUITE_smp_select_nice_fail/OTP-9042:
Allow unexpected driver input event in driver_SUITE:smp_select
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* sverker/doc-fixes/OTP-9002:
Fix minor typos in erl_nif documentation
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* lukas/stdlib/native_escript/OTP-9076:
Update escrips to allow the -n or -compile(native) flag, which compiles the code within the escript with the +native flag. You need an HiPE enabled emulator for this to work.
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epoll on Linux has been seen to sometimes trigger unexpected
events. Most of the time these events are filtered by erl_check_io,
but may slip up to the driver in cases when fd's are reused.
Also made clear in driver docs that spurious events may happen.
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* jp/dependencies_makefile:
Add dependencies Makefile generation to erlc(1) and compile(3)
Conflicts:
lib/compiler/test/compile_SUITE.erl
OTP-9065
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This is useful when a project is built with Makefiles and erlc(1)
instead of EMakefiles. Tracking dependencies by hand is error-prone and
it becomes painful when using external application headers like EUnit's
one.
A dependencies Makefile will look like this:
module.beam: module.erl \
/usr/local/lib/erlang/lib/eunit-2.1.4/include/eunit.hrl \
header.hrl
When included in the main Makefile, 'module' will be recompiled only
when needed.
GCC offers the same feature and new erlc(1) options are compatible with
it.
More informations at:
http://wiki.github.com/dumbbell/otp/dependencies-makefile
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code within the escript with the +native flag. You need an HiPE enabled emulator for this to work.
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Clarify that specifying "-noinput" is unnecessary if the "-detached"
flag is given.
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enif_realloc_binary return int
enif_alloc/enif_free does not accept env as first argument.
enif_send return int
enif_self in alphabetic order
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The compressed format is using a slighty modified variant of the extern format
(term_to_binary). To not worsen key lookup's too much, the top tuple itself
and the key element are not compressed. Table objects with only immediate
non-key elements will therefor not gain anything (but actually consume one
extra word for "alloc_size").
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* pg/freebsd-cpu-affinity-and-topology:
Add support for CPU affinity & topology detection on FreeBSD 8
OTP-8939
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* rickard/dist/OTP-8901:
Be less eager to set dist entry in busy state
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The IP address(es) epmd binds to can now be specified by the user,
either via epmd's new "-address" option or (if that's not used) by
setting the environment variable ERL_EPMD_ADDRESS. Multiple addresses
may be specified using a comma-separated list. If the loopback address
is not in this list, it will be added implicitly, so that the daemon can
be queried by an interactive epmd process.
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* sverker/doc-fixes/OTP-8880:
Documentation update to ETS and drivers
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The runtime system is now less eager to suspend
processes sending messages over the distribution. The
default value of the distribution buffer busy limit
has also been increased from 128 KB to 1 MB. This in
order to improve throughput.
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* sf/erts_de_busy_limit:
Add flag-based setting for the distribution buffer busy limit
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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.
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