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* john/erts/async-thread-defaults/OTP-14928:
Change default async thread count to 1
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to conform with erl_nif.h
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All uses of async threads in the built-in drivers have been
replaced with dirty IO, so it no longer makes sense to leave the
default at 10.
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make erlang:process_info/1 not retrieve messages
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Fix typos in erl_nif.xml
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I was running this code in shell and expected it to take default `self()` meta tracer,
and start tracing `erlang:put/2`.
```
F = fun F() -> timer:sleep(5000), erlang:get(unique_field), erlang:put(unique_field, 123), F() end.
erlang:trace_pattern({erlang, put, 2}, [{['$1', '_'], [{'==', '$1', unique_field}], []}], [global]).
erlang:trace_pattern({erlang, get, 1}, [{['_'], [], [{trace, [], [call, timestamp]}]}], [meta]).
Pid = spawn(F).
```
But tracing didn't start:
```
6> flush().
Shell got {trace_ts,<0.70.0>,call,
{erlang,get,[unique_field]},
{1521,118606,753838}}
Shell got {trace_ts,<0.70.0>,call,
{erlang,get,[unique_field]},
{1521,118611,754798}}
Shell got {trace_ts,<0.70.0>,call,
{erlang,get,[unique_field]},
{1521,118616,755705}}
ok
7> erlang:trace_info(Pid, flags).
{flags,[]}
```
Turns out that I had false expectations, that `{trace, _, _}` would enable tracing on that process, inheriting meta tracer process as consumer of trace messages.
Instead it tried to take tracer from executing process (which is pointed out in docs). But there was none, so no tracing was started and flags were simply ignored (which is not that obvious from docs).
Updated docs to point out that there are cases when flags would be simply ignored, and no tracing would start.
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Conflicts:
OTP_VERSION
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Remove low memory need for HiPE on x86_64
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with link to ! operator
and clarify ugly badarg for unregistered atom argument.
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to replace DFLAGS_STRICT_ORDER_DELIVERY
and remove that compile time dependency.
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Attempt to make the system_info docs easier to navigate
by grouping items of similar themes together in the documentation.
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While enif_make_binary will create heap-binaries from ErlNifBinaries
when possible now, enif_alloc_binary still allocates a Binary* off-heap
which is avoided entirely with enif_make_new_binary.
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* maint:
Updated OTP version
Update release notes
Update version numbers
kernel: Add os:cmd/2 with max_size option
# Conflicts:
# OTP_VERSION
# lib/kernel/doc/src/os.xml
# lib/kernel/src/os.erl
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* maint-20:
Updated OTP version
Update release notes
Update version numbers
erts: Add system_flags(erts_alloc,"+M?sbct *")
erts: Add age order first fit allocator strategies
erts: Refactor erl_ao_firstfit_alloc
erts: Add migration options "acnl" and "acfml"
kernel: Add os:cmd/2 with max_size option
erts: Add more stats for mbcs_pool
erts: Fix alloc_SUITE:migration
stdlib: Make ets_SUITE memory check try again
erts: Improve carrier pool search
erts: Improve alloc_SUITE:migration
erts: Refactor carrier dealloc migration
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into 'sverker/master/alloc-n-migration/ERIERL-88'
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into 'sverker/maint-20/alloc-n-migration/ERIERL-88'
OTP-14915
OTP-14916
OTP-14917
OTP-14918
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to change sbct limit in runtime for chosen allocator type.
With great power comes great responsibility.
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ageffcaoff: Age First Fit Carrier, Address Order First Fit (within carrier)
ageffcbf : Age First Fit Carrier, Best Fit (within carrier)
ageffcaobf: Age First Fit Carrier, Address Order Best Fit (within carrier)
Prefer old carriers, the older the better.
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acnl: Abandon Carrier Nr Limit
acfml: Abandon Carrier Free block Min Limit
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* hasse/no_get_stacktrace/OTP-14861:
erts: Update abstract format doc with stacktrace variable
wx: Do not call erlang:get_stacktrace()
tools: Do not call erlang:get_stacktrace()
stdlib: Do not call erlang:get_stacktrace()
sasl: Do not call erlang:get_stacktrace()
runtime_tools: Do not call erlang:get_stacktrace()
reltool: Do not call erlang:get_stacktrace()
parsetools: Do not call erlang:get_stacktrace()
observer: Do not call erlang:get_stacktrace()
mnesia: Do not call erlang:get_stacktrace() (cont)
mnesia: Do not call erlang:get_stacktrace()
kernel: Do not call erlang:get_stacktrace()
inets: Do not call erlang:get_stacktrace()
eunit: Do not call erlang:get_stacktrace()
et: Do not call erlang:get_stacktrace()
dialyzer: Do not call erlang:get_stacktrace()
debugger: Do not call erlang:get_stacktrace()
debugger: Do not try to restore stacktrace
common_test: Do not call erlang:get_stacktrace()
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The existing wording may be interpreted as saying that embedded mode
eager loads all modules. This revision makes clear embedded mode only
disables module auto loading.
Since I was on it, I have reordered a couple of places to describe
interactive first, and then embedded. It feels natural to cover first
the default and positive mode (auto loads), and then its negation.
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The call "erlang:get_stacktrace()" is not handled explicitly. If there
are issues, they can probably be ignored since erlang:get_stacktrace/1
will be deprecated and removed.
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This is *ONLY* relevant for drivers/NIFs, so it's probably counter-
productive to document it elsewhere.
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Add -MMD option to erlc
OTP-14830
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Add syntax in try/catch to retrieve the stacktrace directly
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The compile option makedep_side_effect, erlc -MMD, instructs
the compiler to emit dependencies and continue to compile
as normal.
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This introduces a way to retrieve erlang terms from NIF IO queues
without having to resort to copying.
OTP-14797
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Document enif_realloc and pointer alignment guarantees
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