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Use `counters:add/3` instead of `ets:update_counter/3`
for counting the number of times a line is executed.
By default, the reference to the counter array for each module will be
stored in a persistent term and retrieved every time a counter is
updated. This makes the compiler test suite with coverage enabled run
*almost* twice as fast (on my computer, in about 6 minutes down from
more than 11 minutes).
To get even more speed, the new `cover:local_only/0` function can be
called to put cover into a mode where the cover-compiled code can only
be run on the local node. In this mode, the cover-compiled modules in
a more efficient way by compiling the counter reference into the
code. This shaves off about one more minute, making the compiler test
suite with coverage enabled run *more than* twice as fast (in about 5
minutes on my computer).
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introduced after OTP_R13B03.
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* maint:
Updated OTP version
Prepare release
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I did not find any legitimate use of "can not", however skipped
changing e.g RFCs archived in the source tree.
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This reverts commit fd8e49b5bddceaae803670121b603b5eee8c5c08.
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If we don't use per thread the value becomes completely
nonsensical on systems with more than one scheduler.
We keep the old solaris behaviour in order to support the
option, but it only really works when using a single
scheduler.
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This reverts commit 202bb737e3deabfebee683266f4b7c42781eb521.
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This commit replaces the old memory instrumentation with a new
implementation that scans carriers instead of wrapping
erts_alloc/erts_free. The old implementation could not extract
information without halting the emulator, had considerable runtime
overhead, and the memory maps it produced were noisy and lacked
critical information.
Since the new implementation walks through existing data structures
there's no longer a need to start the emulator with special flags to
get information about carrier utilization/fragmentation. Memory
fragmentation is also easier to diagnose as it's presented on a
per-carrier basis which eliminates the need to account for "holes"
between mmap segments.
To help track allocations, each allocation can now be tagged with
what it is and who allocated it at the cost of one extra word per
allocation. This is controlled on a per-allocator basis with the
+M<S>atags option, and is enabled by default for binary_alloc and
driver_alloc (which is also used by NIFs).
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This commit also adds a check to see that all files that
are part of an xi:include also have part of XML_FILES
and vice versa. It also fixes any applications where this
was not true.
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* lars/doc-cleanup/OTP-14475:
[edoc] Remove unused module otpsgml_layout.erl
Remove unused files from the documentation build
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* john/erts/runtime-lcnt:
Document rt_mask and add warnings about copy_save
Add an emulator test suite for lock counting
Break erts_debug:lock_counters/1 into separate BIFs
Allow toggling lock counting at runtime
Move lock flags to a common header
Enable register_SUITE for lcnt builds
Enable lcnt smoke test on all builds that have lcnt enabled
Make lock counter info independent of the locks being counted
OTP-14412
OTP-13170
OTP-14413
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This reverts commit eaf8ca41dfa4850437ad270d3897399c9358ced0.
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This allows us to enable/disable lock counting at will, and greatly improves
the performance of erts_debug:lock_counters/1 since we no longer have to
worry about the lock counters "dying" while we're enumerating them.
OTP-14412
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Fix a few minor issues in the lcnt documentation
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We generally avoid abbreviations such as "e.g." and "i.e." in
the documentation. We write "Erlang", not "erlang" (except when
referring to the erlang module).
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This reverts commit dc57404252c47520f352834ad9be45ad684f96c9.
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* maint:
Updated OTP version
Prepare release
Conflicts:
OTP_VERSION
lib/typer/doc/src/notes.xml
lib/typer/vsn.mk
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This allows build scripts to use emake without needing to generate
an Emakefile before running make:all/0,1 or make:file/1,2.
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