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vm_core.h (rb_thread_t): pack small fields together

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On a 64-bit system, this reduces rb_thread_t from 536 to 520 bytes.
Depending on the allocation, this can reduce cacheline access
for checking the abort_on_exception, report_on_exception and
pending_interrupt_queue_checked flags.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64376 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
normal 2018-08-15 05:54:41 +00:00
parent 906ad1670a
commit 727a2d55a3
2 changed files with 9 additions and 9 deletions
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2
thread.c
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@ -3608,7 +3608,7 @@ rb_thread_priority_set(VALUE thread, VALUE prio)
else if (priority < RUBY_THREAD_PRIORITY_MIN) {
priority = RUBY_THREAD_PRIORITY_MIN;
}
target_th->priority = priority;
target_th->priority = (int8_t)priority;
#endif
return INT2NUM(target_th->priority);
}

16
vm_core.h
View file

@ -879,9 +879,14 @@ typedef struct rb_thread_struct {
#ifdef NON_SCALAR_THREAD_ID
rb_thread_id_string_t thread_id_string;
#endif
enum rb_thread_status status;
int to_kill;
int priority;
BITFIELD(enum rb_thread_status) status : 2;
/* bit flags */
unsigned int to_kill : 1;
unsigned int abort_on_exception: 1;
unsigned int report_on_exception: 1;
unsigned int pending_interrupt_queue_checked: 1;
int8_t priority; /* -3 .. 3 (RUBY_THREAD_PRIORITY_{MIN,MAX}) */
uint32_t running_time_us; /* 12500..800000 */
native_thread_data_t native_thread_data;
void *blocking_region_buffer;
@ -919,12 +924,7 @@ typedef struct rb_thread_struct {
/* misc */
VALUE name;
uint32_t running_time_us; /* 12500..800000 */
/* bit flags */
unsigned int abort_on_exception: 1;
unsigned int report_on_exception: 1;
unsigned int pending_interrupt_queue_checked: 1;
} rb_thread_t;
typedef enum {