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* Fix unused variableKazuhiro NISHIYAMA2019-07-291-3/+3
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* Use PRIuSIZE instead of "%zu"Nobuyoshi Nakada2019-07-251-7/+10
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* Add documentation to `fiber_pool_allocate_memory`.Samuel Williams2019-07-191-0/+7
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* Fix 32-bit build and typo.Samuel Williams2019-07-191-2/+2
| | | | | "Therefore, `fiber_pool_stack_free(&vacancy->stack)` can do the wrong thing..." should be "... `fiber_pool_stack_free(stack)` ...".
* Ensure that madvise does not clobber vacancy data.Samuel Williams2019-07-191-5/+19
| | | | | | | | | After calling `fiber_pool_vacancy_reset`, `vacancy->stack` and `stack` are no longer in sync. Therefore, `fiber_pool_stack_free(&vacancy->stack)` can do the wrong thing and clobber the vacancy data. Additionally, when testing using VM_CHECK_MODE > 0, use MADV_DONTNEED if possible, to catch issues w.r.t. clobbered vacancy data earlier.
* Better usage of `rb_ec_clear_vm_stack` to maintain invariants.Samuel Williams2019-07-191-6/+7
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* Improve ec assertions.Samuel Williams2019-07-191-8/+0
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* initialize only Fiber's cfp.Koichi Sasada2019-07-191-0/+1
| | | | | | | fiber->cont.saved_ec.cfp should be initialized by NULL because no vm_stack is allocated. However, cont_init() captures current Fiber's cfp for continuation, so it should only initialize fibers.
* Revert "Ensure cfp is initialized to NULL."Samuel Williams2019-07-191-6/+0
| | | | This reverts commit d7fdf45a4ae1bcb6fac30a24b025d4f20149ba0a.
* Ensure cfp is initialized to NULL.Samuel Williams2019-07-191-0/+6
| | | | | | | `cont_init` didn't initialize `cont->saved_ec.cfp`. Calling `cont_mark` would result in an invalid `cfp` in `rb_execution_context_mark`. Because fibers lazy-initialize the stack, fibers that are created but not resumed could cause this problem to occur.
* Remove `rb_vm_push_frame` as it is no longer used.Samuel Williams2019-07-191-12/+0
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* Adjust styles and indentsNobuyoshi Nakada2019-07-191-21/+33
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* check saved_ec.cfpKoichi Sasada2019-07-181-1/+3
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* Ensure we don't have dangling cfp.Samuel Williams2019-07-191-0/+1
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* * remove trailing spaces.git2019-07-181-1/+1
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* Improve `fiber_pool_expand` allocation strategy.Samuel Williams2019-07-181-23/+47
| | | | | | | | If `mmap` fails to allocate memory, try half the size, and so on. Limit FIBER_POOL_ALLOCATION_MAXIMUM_SIZE to 1024 stacks. In typical configurations this limits the memory mapped region to ~128MB per allocation.
* Add experimental `RUBY_SHARED_FIBER_POOL_FREE_STACKS` to control madvise.Samuel Williams2019-07-181-0/+5
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* Make fiber_pool more conservative on platforms with limited address space.Samuel Williams2019-07-181-12/+12
| | | | | | | We use COROUTINE_LIMITED_ADDRESS_SPACE to select platforms where address space is 32-bits or less. Fiber pool implementation enables more book keeping, and reduces upper limits, in order to minimise address space utilisation.
* Add `struct fiber_pool {int free_stacks;}` to control usage of madvise.Samuel Williams2019-07-181-1/+10
| | | | | | | `madvise(free)` and similar operations are good because they avoid swap usage by clearing the dirty bit on memory pages which are mapped but no longer needed. However, there is some performance penalty if there is no memory pressure. Therefore, we do it by default, but it can be avoided.
* Add FIBER_POOL_ALLOCATION_FREE to control allocation/free strategy.Samuel Williams2019-07-181-8/+43
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* Limit expansion of fiber pool on 32-bit platforms.Samuel Williams2019-07-181-46/+150
| | | | | | | | | On 32-bit platforms, expanding the fiber pool by a large amount may fail, even if a smaller amount may succeed. We limit the maximum size of a single allocation to maximise the number of fibers that can be allocated. Additionally, we implement the book-keeping required to free allocations when their usage falls to zero.
* Enable `madvise` to release stack space back to OS.Samuel Williams2019-07-181-98/+142
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* Improve build process and coroutine implementation selection.Samuel Williams2019-07-181-6/+1
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* Stack copying implementation of coroutines.Samuel Williams2019-07-181-2/+23
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* Implement fiber pool for reduced fiber allocation overhead.Samuel Williams2019-07-181-192/+508
| | | | | | | Replace previous stack cache with fiber pool cache. The fiber pool allocates many stacks in a single memory region. Stack allocation becomes O(log N) and fiber creation is amortized O(1). Around 10x performance improvement was measured in micro-benchmarks.
* Make FIBER_USE_NATIVE the default and reformat code.Samuel Williams2019-07-181-518/+252
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* * expand tabs.git2019-07-081-35/+35
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* Fix indentNobuyoshi Nakada2019-07-081-4/+4
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* Renamed fib to fiberNobuyoshi Nakada2019-07-081-244/+244
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* Use native coroutine implementation on OpenBSD-amd64Jeremy Evans2019-06-261-1/+0
| | | | When using native fibers, do not load ucontext, as it isn't needed.
* Add `ucontext` coroutine implementation for generic fallback.Samuel Williams2019-06-261-4/+4
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* * remove trailing spaces.git2019-06-241-1/+1
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* Print warning if not using native coroutine.Samuel Williams2019-06-241-0/+2
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* Transition root fiber into state FIBER_TERMINATED.Samuel Williams2019-06-201-0/+11
| | | | | | | During fork, it's possible that threads with root fibers are terminated, but fiber state is not updated. `fiber_verify` will subsequently fail. We forcefully enter the FIBER_TERMINATED state when terminating the root fiber.
* Ensure that vm_stack is cleared in `thread_cleanup_func_before_exec`.Samuel Williams2019-06-201-9/+2
| | | | | | | | If `vm_stack` is left dangling in a forked process, the gc attempts to scan it, but it is invalid and will cause a segfault. Therefore, we clear it before forking. In order to simplify this, `rb_ec_clear_vm_stack` was introduced.
* Revert failed attempt at fixing invalid usage of vm_stack.Samuel Williams2019-06-201-2/+9
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* Ensure `vm_stack` is cleared after fork.Samuel Williams2019-06-201-10/+2
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* Set `cfp` to null (along with vm_stack) in `rb_fiber_close`.Samuel Williams2019-06-201-0/+1
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* Adjust indentNobuyoshi Nakada2019-06-191-1/+1
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* Remove IA64 support.Samuel Williams2019-06-191-92/+1
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* Use shared implementation of `rb_ec_initialize_vm_stack`.Samuel Williams2019-06-191-13/+1
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* Track how stack was allocated for `cont_free`.Samuel Williams2019-06-191-8/+21
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* Better handling of root fiber.Samuel Williams2019-06-191-4/+3
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* * expand tabs.git2019-06-121-3/+3
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* Add compaction support for more types.Aaron Patterson2019-06-111-5/+37
| | | | | | | | This commit adds compaction support for: * Fibers * Continuations * Autoload Constants
* ia64: Don't clear register_stack_startJames Clarke2019-04-271-1/+0
| | | | | | | | r59829 stopped clearing stack_start and enabled the code for !FIBER_USE_NATIVE, but we need to do the same for register_stack_start on ia64, otherwise we end up with NULL in cont_save_machine_stack. Closes: https://github.com/ruby/ruby/pull/2155
* [DOC] fix markups [ci skip]nobu2019-03-221-25/+24
| | | | git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67337 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* Fix styles [ci skip]nobu2019-01-091-2/+4
| | | | git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66762 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* Fix #endif annotation.samuel2018-12-281-1/+1
| | | | git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66612 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* Don't allow rb_fiber_resume to raise exception on unborn fiber.samuel2018-12-281-0/+5
| | | | git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66611 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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