issue: 2342345 Optimize wakeup mechanizm #942
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Add class wakeup_eventfd which hold fd created from eventfd() (represented counter in kernel). This fd using as an event wait/notify mechanism. Call read() for this fd will increment counter and fd will be ready to read. Call write() will decrement counter to zero. Signed-off-by: Yohanan Betsis <[email protected]> Reviewed-by: Igor Ivanov <[email protected]>
There issue with big CPU consumption in softirq when we use epoll and have large number of waiters for CQ fd. This poll() implementation using wakeup_eventfd() for wakeup mechanism. Signed-off-by: Yohanan Betsis <[email protected]> Reviewed-by: Igor Ivanov <[email protected]>
Add fds which we want to delete in array and wakeup. After wake up we handle its event and delete fds from delete fds' array from poll array. Signed-off-by: Yohanan Betsis <[email protected]> Reviewed-by: Igor Ivanov <[email protected]>
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The PR is based on: #915