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Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 42 |
1 files changed, 42 insertions, 0 deletions
@@ -1,3 +1,45 @@ +Thu Dec 20 06:59:52 2012 Koichi Sasada <ko1@atdot.net> + + * vm.c: support variable VM/Machine stack sizes. + Specified by the following environment variaables: + - RUBY_THREAD_VM_STACK_SIZE: vm stack size used at thread creation. + default: 128KB (32bit CPU) or 256KB (64bit CPU). + - RUBY_THREAD_MACHINE_STACK_SIZE: machine stack size used at thread + creation. default: 512KB or 1024KB. + - RUBY_FIBER_VM_STACK_SIZE: vm stack size used at fiber creation. + default: 64KB or 128KB. + - RUBY_FIBER_MACHINE_STACK_SIZE: machine stack size used at fiber + creation. default: 256KB or 256KB. + This values are specified at launched timing. You can not change + these values at running time. + Environ variables are only *hints* because: + - They are aligned to 4KB. + - They have minimum values (depend on OSs). + - Machine stack settings are ignored by some OSs. + Default values especially fiber stack sizes are increased. + This change affect Fiber's behavior: + (1) You can run more complex program on a Fiber. + (2) You can not make many (thousands) Fibers because of + lack of address space (on 32bit CPU). + If (2) bothers you, + (a) Use 64bit CPU with big memory, or + (b) Specify RUBY_FIBER_(VM|MACHINE)_STACK_SIZE correctly. + You need to choose correct stack size carefully. These values + are completely rely on systems (OS/compiler and so on). + + * vm_core.h (rb_vm_t::default_params): add to record above settings. + + * vm.c (RubyVM::DEFAULT_PARAMS): add new constant to see + above setting. + + * thread_pthread.c: support RUBY_THREAD_MACHINE_STACK_SIZE. + + * cont.c: support RUBY_FIBER_(VM|MACHINE)_STACK_SIZE. + + * test/ruby/test_fiber.rb: add tests for above. + + * test/ruby/test_thread.rb: ditto. + Thu Dec 20 06:25:44 2012 Koichi Sasada <ko1@atdot.net> * test/ruby/test_fiber.rb: remove a strange single quote character. |