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8028280: ParkEvent leak when running modified runThese which only loads classes

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Use spin lock to manage ParkEvent and PlatformEvent free lists.

Reviewed-by: dholmes, fparain
This commit is contained in:
David Simms 2014-01-24 09:28:47 +01:00
parent 90a44b778d
commit edb5dd324e
7 changed files with 95 additions and 112 deletions
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30
hotspot/src/os/linux/vm/os_linux.cpp
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@ -3871,9 +3871,33 @@ int os::sleep(Thread* thread, jlong millis, bool interruptible) {
}
}
int os::naked_sleep() {
// %% make the sleep time an integer flag. for now use 1 millisec.
return os::sleep(Thread::current(), 1, false);
//
// Short sleep, direct OS call.
//
// Note: certain versions of Linux CFS scheduler (since 2.6.23) do not guarantee
// sched_yield(2) will actually give up the CPU:
//
// * Alone on this pariticular CPU, keeps running.
// * Before the introduction of "skip_buddy" with "compat_yield" disabled
// (pre 2.6.39).
//
// So calling this with 0 is an alternative.
//
void os::naked_short_sleep(jlong ms) {
struct timespec req;
assert(ms < 1000, "Un-interruptable sleep, short time use only");
req.tv_sec = 0;
if (ms > 0) {
req.tv_nsec = (ms % 1000) * 1000000;
}
else {
req.tv_nsec = 1;
}
nanosleep(&req, NULL);
return;
}
// Sleep forever; naked call to OS-specific sleep; use with CAUTION