diff options
| author | Aaron Patterson <[email protected]> | 2024-11-01 15:06:35 -0700 |
|---|---|---|
| committer | Aaron Patterson <[email protected]> | 2024-12-12 16:04:49 -0800 |
| commit | fffef9aa5d89b6cca3dc634f5278b1fc67fb3d08 () | |
| tree | 600f63118e7ef716d183b2894e918febcdeb3c49 | |
| parent | e7ee7d43f3d22f499845ee2c8c420201d6b453a3 (diff) | |
Add an environment variable for controlling the default Thread quantum
This commit adds an environment variable `RUBY_THREAD_TIMESLICE` for specifying the default thread quantum in milliseconds. You can adjust this variable to tune throughput, which is especially useful on multithreaded systems that are mixing CPU bound work and IO bound work. The default quantum remains 100ms. [Feature #20861] Co-Authored-By: John Hawthorn <[email protected]>
Notes: Merged: https://.com/ruby/ruby/pull/11981
| -rw-r--r-- | man/ruby.1 | 4 | ||||
| -rw-r--r-- | thread.c | 10 | ||||
| -rw-r--r-- | thread_none.c | 4 | ||||
| -rw-r--r-- | thread_pthread.c | 7 |
4 files changed, 13 insertions, 12 deletions
@@ -537,6 +537,10 @@ Introduced in Ruby 3.3, default: unset. .Pp .It Ev RUBY_PAGER The pager command that will be used for .Fl -help option. Introduced in Ruby 3.0, default: @@ -116,6 +116,8 @@ static VALUE sym_immediate; static VALUE sym_on_blocking; static VALUE sym_never; #define THREAD_LOCAL_STORAGE_INITIALISED FL_USER13 #define THREAD_LOCAL_STORAGE_INITIALISED_P(th) RB_FL_TEST_RAW((th), THREAD_LOCAL_STORAGE_INITIALISED) @@ -2538,7 +2540,7 @@ rb_threadptr_execute_interrupts(rb_thread_t *th, int blocking_timing) } if (timer_interrupt) { - uint32_t limits_us = TIME_QUANTUM_USEC; if (th->priority > 0) limits_us <<= th->priority; @@ -5506,6 +5508,12 @@ Init_Thread(void) rb_define_method(cThGroup, "enclosed?", thgroup_enclosed_p, 0); rb_define_method(cThGroup, "add", thgroup_add, 1); { th->thgroup = th->ractor->thgroup_default = rb_obj_alloc(cThGroup); rb_define_const(cThGroup, "Default", th->thgroup); @@ -19,10 +19,6 @@ # include "wasm/machine.h" #endif -#define TIME_QUANTUM_MSEC (100) -#define TIME_QUANTUM_USEC (TIME_QUANTUM_MSEC * 1000) -#define TIME_QUANTUM_NSEC (TIME_QUANTUM_USEC * 1000) - // Do nothing for GVL static void thread_sched_to_running(struct rb_thread_sched *sched, rb_thread_t *th) @@ -317,13 +317,6 @@ static void threadptr_trap_interrupt(rb_thread_t *); #define native_thread_yield() ((void)0) #endif -/* 100ms. 10ms is too small for user level thread scheduling - * on recent Linux (tested on 2.6.35) - */ -#define TIME_QUANTUM_MSEC (100) -#define TIME_QUANTUM_USEC (TIME_QUANTUM_MSEC * 1000) -#define TIME_QUANTUM_NSEC (TIME_QUANTUM_USEC * 1000) - static void native_thread_dedicated_inc(rb_vm_t *vm, rb_ractor_t *cr, struct rb_native_thread *nt); static void native_thread_dedicated_dec(rb_vm_t *vm, rb_ractor_t *cr, struct rb_native_thread *nt); static void native_thread_assign(struct rb_native_thread *nt, rb_thread_t *th); |