void cpu_idle (void)
{
/* endless idle loop with no priority at all */
while (1) {
void (*idle)(void) = pm_idle;
if (!idle)
idle = default_idle;
if (!current->need_resched)
idle();
schedule();
check_pgt_cache();
}
}
此代码存
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我正在运行SQL2019 CU4 Linux,并看到了大量的PWAIT_EXTENSIBILITY_CLEANUP_TASK。有人能分享他们对这种等待类型意味着什么以及我们如何减少它的洞见吗?
Select * from sys.dm_os_wait_stats
WHERE
wait_time_ms<>0
and wait_type='PWAIT_EXTENSIBILITY_CLEANUP_TASK'
order by signal_wait_time_ms desc
看看Java的:
NEW
A thread that has not yet started is in this state.
RUNNABLE
A thread executing in the Java virtual machine is in this state.
BLOCKED
A thread that is blocked waiting for a monitor lock is in this state.
WAITING
A thread that is waiting indefinitely for another thread to perform a parti
在我正在使用的应用程序中,很少有线程。这些线程设置为FreeOnTerminate,我不允许更改此行为。在老开发人员等待主线程中的一些信号时,我看到了一些奇怪的东西,如下所示:
让:
var FWaits: array of TEvent;
var FThreads: array of TBkgThread;
const C = 10;
对于每个线程,我们有一个事件,然后是Length(Threads) = Length(FWaits)
for I:= 0 to C-1 do
begin
FWaits[I]:= TSimpleEvent.Create;
FThreads