From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zach Brown Subject: Pure polling mode for netdevices Date: Fri, 21 Oct 2016 13:03:17 -0500 Message-ID: <20161021180316.GA305@zach-desktop> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Cc: To: Return-path: Received: from mail-dm3nam03on0121.outbound.protection.outlook.com ([104.47.41.121]:34560 "EHLO NAM03-DM3-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932695AbcJUSDc (ORCPT ); Fri, 21 Oct 2016 14:03:32 -0400 Content-Disposition: inline Sender: netdev-owner@vger.kernel.org List-ID: Is there a way to get NAPI to poll all the time? Or just any way to get netdevices to use only polling and no interrupts? We have some rt targets where the jitter can be improved by disabling interrupts and using just polling. In these cases we're okay with the performance downsides that come with polling. In particular we already have an implementation for the cadence macb driver that does only polling mode and have verified that it improves the jitter. We're hoping for a more general existing solution or at the very least a solution that would be accepted upstream. Any thoughts?