3869 } |
3869 } |
3870 return OS_OK ; |
3870 return OS_OK ; |
3871 } |
3871 } |
3872 } |
3872 } |
3873 |
3873 |
3874 int os::naked_sleep() { |
3874 // |
3875 // %% make the sleep time an integer flag. for now use 1 millisec. |
3875 // Short sleep, direct OS call. |
3876 return os::sleep(Thread::current(), 1, false); |
3876 // |
|
3877 // Note: certain versions of Linux CFS scheduler (since 2.6.23) do not guarantee |
|
3878 // sched_yield(2) will actually give up the CPU: |
|
3879 // |
|
3880 // * Alone on this pariticular CPU, keeps running. |
|
3881 // * Before the introduction of "skip_buddy" with "compat_yield" disabled |
|
3882 // (pre 2.6.39). |
|
3883 // |
|
3884 // So calling this with 0 is an alternative. |
|
3885 // |
|
3886 void os::naked_short_sleep(jlong ms) { |
|
3887 struct timespec req; |
|
3888 |
|
3889 assert(ms < 1000, "Un-interruptable sleep, short time use only"); |
|
3890 req.tv_sec = 0; |
|
3891 if (ms > 0) { |
|
3892 req.tv_nsec = (ms % 1000) * 1000000; |
|
3893 } |
|
3894 else { |
|
3895 req.tv_nsec = 1; |
|
3896 } |
|
3897 |
|
3898 nanosleep(&req, NULL); |
|
3899 |
|
3900 return; |
3877 } |
3901 } |
3878 |
3902 |
3879 // Sleep forever; naked call to OS-specific sleep; use with CAUTION |
3903 // Sleep forever; naked call to OS-specific sleep; use with CAUTION |
3880 void os::infinite_sleep() { |
3904 void os::infinite_sleep() { |
3881 while (true) { // sleep forever ... |
3905 while (true) { // sleep forever ... |