From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: aio poll, io_pgetevents and a new in-kernel poll API Date: Tue, 9 Jan 2018 13:28:50 +0100 Message-ID: <20180109122850.GA6567@lst.de> References: <20180104080043.14506-1-hch@lst.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Avi Kivity , linux-aio@kvack.org, linux-fsdevel@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org To: viro@zeniv.linux.org.uk Return-path: Content-Disposition: inline In-Reply-To: <20180104080043.14506-1-hch@lst.de> Sender: owner-linux-aio@kvack.org List-Id: netdev.vger.kernel.org On Thu, Jan 04, 2018 at 09:00:12AM +0100, Christoph Hellwig wrote: > The changes were sponsored by Scylladb, and improve performance > of the seastar framework up to 10%, while also removing the need > for a privileged SCHED_FIFO epoll listener thread. Due to the current events: With KPTI enabled the aio poll code is almost 16% faster than epoll with the special SCHED_FIFO listener thread. The Scylladb https example is still more than 4% faster with KPTI and aio poll vs non-KPTI with epoll. -- To unsubscribe, send a message with 'unsubscribe linux-aio' in the body to majordomo@kvack.org. For more info on Linux AIO, see: http://www.kvack.org/aio/ Don't email: aart@kvack.org