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8203227: Introduce os::processor_id() for Linux and Solaris

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Reviewed-by: dholmes, rehn
This commit is contained in:
Per Lidén 2018-05-18 15:21:23 +02:00
parent ab469d40fc
commit dface12e6d
3 changed files with 20 additions and 0 deletions
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10
src/hotspot/os/linux/os_linux.cpp
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@ -2872,6 +2872,10 @@ void os::Linux::sched_getcpu_init() {
set_sched_getcpu(CAST_TO_FN_PTR(sched_getcpu_func_t,
(void*)&sched_getcpu_syscall));
}
if (sched_getcpu() == -1) {
vm_exit_during_initialization("getcpu(2) system call not supported by kernel");
}
}
// Something to do with the numa-aware allocator needs these symbols
@ -5229,6 +5233,12 @@ int os::active_processor_count() {
return active_cpus;
}
uint os::processor_id() {
const int id = Linux::sched_getcpu();
assert(id >= 0 && id < _processor_count, "Invalid processor id");
return (uint)id;
}
void os::set_native_thread_name(const char *name) {
if (Linux::_pthread_setname_np) {
char buf [16]; // according to glibc manpage, 16 chars incl. '/0'