使用此代码:
void yield_sleep(void)
{
using namespace std::chrono;
static size_t thread_num;
auto start{high_resolution_clock::now()};
std::this_thread::yield();
auto end{high_resolution_clock::now()};
std::cout << thread_num++
<< "|Waiting for: "
<< duration_cast<microseconds>(end - start).count()
<< " ms."
<< std::endl;
}
int main(void)
{
std::vector<std::thread> tp(62434);
std::generate(tp.begin(), tp.end(), []() { return std::thread(yield_sleep); });
std::for_each(tp.begin(), tp.end(), [](auto& t) { t.join(); });
}
程序创建 ~32718 线程并抛出异常:
terminate called after throwing an instance of 'std::system_error'
what(): Resource temporarily unavailable
但/proc/sys/kernel/threads-max
值是62434。有什么问题?为什么我的程序在创建线程期间抛出异常?