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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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OTP-15024
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This may be of interest in crash dumps and allows the upcoming
allocation tagging feature to track allocations on a per-NIF basis.
Note that this is only updated when user code calls a NIF; it's not
altered when the emulator calls NIFs during code upgrades or
tracing.
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This increases the accuracy of crash dumps and the upcoming
allocation tagging feature.
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* rickard/process_info/OTP-14966:
Fix deadlock in HiPE gc after receive
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* rickard/monotonic_time_1_fix/OTP-15008:
Teach erlang:monotonic_time/1 the perf_counter time unit
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* rickard/process_info/OTP-14966:
New process_info() implementation using signals
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* rickard/signals/OTP-14589:
Fix VM probes compilation
Conflicts:
erts/emulator/beam/erl_message.c
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Improve float_to_list(F, [{decimals,D}])
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* lukas/erts/fix_openbsd_eof_poll/OTP-14346:
erts: Break etp-processes/ports when all found
erts: Don't use EV_DISPATCH on openbsd
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* rickard/signals/OTP-14589:
Fix seq trace
Fix bad assert
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63e1c58d27ab (PR #1725) started to compile external funs
as literals.
This commit updates the dumping of literal areas to dump
external fun literals to the crash dump.
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to better conform with io_lib:format("~.*f", [D,F])
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Compile external fun expressions to literals
OTP-15003
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* lukas/erts/tcp_send_return_closed/OTP-15001:
erts: tcp send should return {error,closed}
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Currently (OpenBSD 6.2) the kqueu implementation on
opnebsd does not work properly for EOF conditions when
using EV_DISPATCH, so we use the EV_ONESHOT fallback there.
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* sverker/driver-taints/OTP-14960:
erts: Include foreign static linked drivers in taints
erts: Fix harmless bug in macro IS_DRIVER_VERSION_GE
erts: Remove our own NIF modules from "taints"
erts: Refactor erts_static_nif_get_nif_init
erts: Add dynamic loaded drivers to list of "taints"
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detected by valgrind. We cannot compare monitor
in state MON_FREE before it's initialized.
Still not really kosher to access 'state' without lock or atomic-op.
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* john/erts/bwt-wt-dirty-schedulers/OTP-14959:
Add +sbwt/+swt analogues for dirty schedulers
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jhogberg/john/erts/any-term-as-seq_trace-label/OTP-14899
Lift the type restrictions on seq_trace token labels
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That is, driver added with config option --enable-static-drivers.
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harmless until we bump major version
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The expressions fun M:F/A, when all elements are literals are also
treated as a literal. Since they have consistent representation and
don't depend on the code currently loaded in the VM, this is safe.
This can provide significant performance improvements in code using such
functions extensively - a full function call to erlang:make_fun/3 is
replaced by a single move instruction and no register shuffling or
saving registers to stack is necessary. Additionally, compound data
types that contain such external functions as elements can be treated as
literals too.
The commit also changes the representation of external funs to be a
valid Erlang syntax and adds support for literal external funs to core
Erlang.
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* rickard/signals/OTP-14589:
Fix VM probes compilation
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* raimo/type-posix-0-overhaul/ERL_550/OTP-14019:
Update types for posix error codes
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Sharing these settings for all schedulers can degrade performance,
so it makes sense to be able to configure them separately.
This also changes the default busy-wait time to "short" for both
kinds of dirty schedulers.
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I have read the man pages for most socket and file operations
on recent Linux, FreeBSD, OpenBSD and Solaris 10 and noted
the possible error codes.
Which error codes that are possible for file operations have
been updated in file:posix/0. Error codes for socket operations
in inet:posix/0. The latter refers to the former so it is
a superset, assuming that e.g sendfile and AF_UNIX socket
operations could cause socket operations to return any file
error code. That is not entirely true, but could be,
especially in the future.
Added to file:posix/0 are:
ebadmsg edeadlk edeadlock eftype emultihop enobufs enolck enolink
enosr enostr enosys eopnotsupp eoverflow erange etxtbsy
Added to inet:posix/0 are all but:
exbadport exbadseq file:posix()
These are still possible according to erl_posix_str.c,
but are not in file:posix/0 nor in inet:posix/0,
and many of them are not file nor inet related, but some might be:
e2big eadv ealign ebade ebadfd ebadr ebadrpc ebadrqc
ebadslt ebfont echild echrng ecomm edirty
edom edotdot eduppkg eidrm einit eisnam
elbin el2hlt el2nsync el3hlt el3rst
elibacc elibbad elibexec elibmax elibscn elnrng
enavail enet enoano enocsi enodata enoexec
enonet enosym enotempty enotnam enotuniq
eproclim eprocunavail eprogmismatch eprogunavail
erefused eremchg eremdev eremote eremoteio
eremoterelease erpcmismatch erremote eshutdown
esrmnt esuccesss etime etoomanyrefs
euclean eunatch eusers eversion exfull
sysnotready vernotsupported ediscon enomore
ecancelled einvalidproctable einvalidprovider eproviderfailedinit
syscallfailure service_not_found type_not_found e_no_more
e_cancelled unknown
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* rickard/signals/OTP-14589:
Fix VM probes compilation
Fix lock counting
Fix signal order for is_process_alive
Fix signal handling priority elevation
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OTP-14899
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This also removes a redundant #ifdef soup that had hidden the
problem on most platforms.
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* john/erts/async-thread-defaults/OTP-14928:
Change default async thread count to 1
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* john/erts/nif-map-from-array/OTP-14954:
Add enif_make_map_from_arrays
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* john/erts/list-installed-nifs/OTP-14965:
Add an option to ?MODULE:module_info/1 for listing NIFs
Fix a misleading comment
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