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vm_core.h (rb_thread_t): use 32-bit running_time_us

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The current range based current values of:

	TIME_QUANTUM_USEC=100000
	RUBY_THREAD_PRIORITY_MAX=3
	RUBY_THREAD_PRIORITY_MIN=-3

Gives a range of 12500..800000, plenty enough for a 32-bit
integer.  Clamping this also reduces potential implementation
bugs between 32-bit and 64-bit platforms.

I may consider a further reduction to uint16_t in the future
for M:N threading, but some users may want slightly larger
time quantums.

* vm_core.h (rb_thread_t): use 32-bit running_time_us

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58591 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
normal 2017-05-07 08:06:02 +00:00
parent b1bb2520c8
commit 95f135960f
2 changed files with 3 additions and 3 deletions
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4
thread.c
View File

@ -1247,7 +1247,7 @@ rb_thread_sleep(int sec)
}
static void
rb_thread_schedule_limits(unsigned long limits_us)
rb_thread_schedule_limits(uint32_t limits_us)
{
thread_debug("rb_thread_schedule\n");
if (!rb_thread_alone()) {
@ -2085,7 +2085,7 @@ rb_threadptr_execute_interrupts(rb_thread_t *th, int blocking_timing)
}
if (timer_interrupt) {
unsigned long limits_us = TIME_QUANTUM_USEC;
uint32_t limits_us = TIME_QUANTUM_USEC;
if (th->priority > 0)
limits_us <<= th->priority;

2
vm_core.h
View File

@ -816,7 +816,7 @@ typedef struct rb_thread_struct {
#ifdef USE_SIGALTSTACK
void *altstack;
#endif
unsigned long running_time_us;
uint32_t running_time_us; /* 12500..800000 */
VALUE name;
} rb_thread_t;