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path: root/erts/emulator/beam/erl_goodfit_alloc.c
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2018-06-18Update copyright yearHenrik Nord
2018-03-09Always use sys_memcpy/cmp/etc instead of plain memcpy/cmp/etcJohn Högberg
2018-02-12erts: Add system_flags(erts_alloc,"+M?sbct *")Sverker Eriksson
to change sbct limit in runtime for chosen allocator type. With great power comes great responsibility.
2016-11-17erts: Refactor crash dumping with cbprintfSverker Eriksson
Instead of passing around a file descriptor use a function pointer to facilitate more advanced backend write logic such as size limitation or compression.
2016-03-15update copyright-yearHenrik Nord
2016-02-24erts: Change erl_exit into erts_exitSverker Eriksson
This is mostly a pure refactoring. Except for the buggy cases when calling erlang:halt() with a positive integer in the range -(INT_MIN+2) to -INT_MIN that got confused with ERTS_ABORT_EXIT, ERTS_DUMP_EXIT and ERTS_INTR_EXIT. Outcome OLD erl_exit(n, ) NEW erts_exit(n, ) ------- ------------------- ------------------------------------------- exit(Status) n = -Status <= 0 n = Status >= 0 crashdump+abort n > 0, ignore n n = ERTS_ERROR_EXIT < 0 The outcome of the old ERTS_ABORT_EXIT, ERTS_INTR_EXIT and ERTS_DUMP_EXIT are the same as before (even though their values have changed).
2015-06-18Change license text to APLv2Bruce Yinhe
2013-06-03erts: Remove unnecessary flag arguments in allocatorsSverker Eriksson
A cleanup after SBMBC was removed.
2013-06-03erts: Remove SBMBC allocatorSverker Eriksson
2013-06-03erts: Change naive list to rb-tree of carriers in AOFF allocatorSverker Eriksson
and add new callbacks add_mbc(), remove_mbc() and largest_fblk_in_mbc() for carrier migration.
2013-06-03erts: Make carrier header sizes customizableSverker Eriksson
This is a modified partial revert of 2ab1d972f6fd37c17b05
2013-05-06erts: Change some more 'long' to pointer sized int (ErlDrvUInt)Sverker Eriksson
2013-01-25Update copyright yearsBjörn-Egil Dahlberg
2012-11-21erts: Make carrier header sizes compile time constantsSverker Eriksson
No allocator strategy is using customized carrier headers anyway.
2012-11-15erts: Add carrier pointer to header of free blockSverker Eriksson
2012-11-15erts: Add carrier offset to internal allocation headersSverker Eriksson
2011-11-13Optimize memory allocationRickard Green
A number of memory allocation optimizations have been implemented. Most optimizations reduce contention caused by synchronization between threads during allocation and deallocation of memory. Most notably: * Synchronization of memory management in scheduler specific allocator instances has been rewritten to use lock-free synchronization. * Synchronization of memory management in scheduler specific pre-allocators has been rewritten to use lock-free synchronization. * The 'mseg_alloc' memory segment allocator now use scheduler specific instances instead of one instance. Apart from reducing contention this also ensures that memory allocators always create memory segments on the local NUMA node on a NUMA system.
2011-09-29Update copyright yearsBjörn-Egil Dahlberg
2011-07-08Use separate memory carriers for small blocksRickard Green
2010-03-22Merge branch 'pan/otp_8332_halfword' into devErlang/OTP
* pan/otp_8332_halfword: Teach testcase in driver_suite the new prototype for driver_async wx: Correct usage of driver callbacks from wx thread Adopt the new (R13B04) Nif functionality to the halfword codebase Support monitoring and demonitoring from driver threads Fix further test-suite problems Correct the VM to work for more test suites Teach {wordsize,internal|external} to system_info/1 Make tracing and distribution work Turn on instruction packing in the loader and virtual machine Add the BeamInstr data type for loaded BEAM code Fix the BEAM dissambler for the half-word emulator Store pointers to heap data in 32-bit words Add a custom mmap wrapper to force heaps into the lower address range Fit all heap data into the 32-bit address range
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.
2009-11-20The R13B03 release.OTP_R13B03Erlang/OTP