From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id C8F3941C44 for ; Thu, 9 Feb 2023 01:00:59 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 8A68840DDA; Thu, 9 Feb 2023 01:00:59 +0100 (CET) Received: from mail-pj1-f54.google.com (mail-pj1-f54.google.com [209.85.216.54]) by mails.dpdk.org (Postfix) with ESMTP id B05A04067B for ; Thu, 9 Feb 2023 01:00:58 +0100 (CET) Received: by mail-pj1-f54.google.com with SMTP id gj9-20020a17090b108900b0023114156d36so3984595pjb.4 for ; Wed, 08 Feb 2023 16:00:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:from:to:cc:subject:date :message-id:reply-to; bh=d2e6RtqSdN2A0/KlGFkBw9emTYVeeN0YFreov9ywjhc=; b=v+pps+FZ9aoJeaBWOFDu+h36UVJ9fpLUSMCeSEV1kDe/LZZyHFSqUbk708u/CGAmd7 JxE75HGj1EeLE04RXYYPNl/gt/gwGhviT5kxOUF2Neux4SVX/ao8XNcm5vcllcDo347W Y2FUJo7SG4y5RhDGO9aIA+3bodKQzwp5I3P4VYSN9Nwnig6JZBeAU4Cyxatvl70gIM0T dqcDHLSg90dd23UqfydYT7QsfXpSurtF0BzK7RNQ6N08dYmfJ69auOI56+ncyfrQZQjl mojzsRrN9YoTCX36Ah5A56TkiYvg7sDRvO+L1+FfGPZHKNxkHA+glSqxXnZBSR5hpUVu TGGw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=d2e6RtqSdN2A0/KlGFkBw9emTYVeeN0YFreov9ywjhc=; b=BErS80RS3QvuXEdyrO9QswFsLUkTDivLKM9Djakc3afFH1tdbWrBK6rn4cYfWX9oJv qv5OC8FCIiD7mbdeJSLA30rh0OceUMCU/h1mKr/mi7cAXYP7qAzZRvZ+ChfAOkMIFjOU CQ336FGrkLzEgSbuU9TxxNSXhNC++2H6Ud40nylqLHduCmBgzFLuIknxE/YTnp7pRCO9 7Q+LOmeOGg7uyl/VwkngcX/eOxP5Ab+VzNgnXjQ/QrB3bNaSOfMDG8oU9QYnaGYu4ylO PVUyWZwOFA+Ys9QLGKDIjShxpH3whM7TM8rn4DdVPEQB63LNJxmuxoI14QTem2u6/iN9 XRAA== X-Gm-Message-State: AO0yUKVBu6WxtqrOE2d7VzydCsYbgx1n2VSc0SBNWwDDt0y/faqzskDB IzkDE6hfyvoOMhaSN4Pvu/TXZQ== X-Google-Smtp-Source: AK7set+R906clhYS91OqSAU7boe2I01UpozKjG8BXwQODVokfmmIhmLbau19fW5c5h6UU9rAA30WLA== X-Received: by 2002:a05:6a20:8e05:b0:c3:18f8:6c3a with SMTP id y5-20020a056a208e0500b000c318f86c3amr4729575pzj.9.1675900857725; Wed, 08 Feb 2023 16:00:57 -0800 (PST) Received: from hermes.local (204-195-120-218.wavecable.com. [204.195.120.218]) by smtp.gmail.com with ESMTPSA id l9-20020a62be09000000b00581f76c1da1sm11785766pff.191.2023.02.08.16.00.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Feb 2023 16:00:57 -0800 (PST) Date: Wed, 8 Feb 2023 16:00:55 -0800 From: Stephen Hemminger To: Ken Cox Cc: users@dpdk.org Subject: Re: Porting application from libevent Message-ID: <20230208160055.57592913@hermes.local> In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: users-bounces@dpdk.org On Wed, 8 Feb 2023 14:46:19 -0500 Ken Cox wrote: > I have several server applications based on libevent ( > https://github.com/libevent/libevent) that use high-resolution timers, UDP, > and TCP sockets. Right now they run on SR-IOV instances and I would like > to port these to DPDK to get access to bonded interfaces. Any advice? > > I read most of the DPDK Programmer's Guide, and looked at the Event Device > Library, but it is quite low-level and will entail a substantial amount of > rework. > I looked at dpdk-ans (https://github.com/ansyun/dpdk-ans), which provides a > socket API on top of DPDK, but it seems to be not recently maintained. > I also looked at seastar (https://github.com/scylladb/seastar), which > provides an event-driven framework on top of DPDK, but it would require a > complete rewrite from libevent to futures and C++17. > > Any advice would be very much appreciated! > > -- > -Ken I have some experience with libevent. It is really mostly a wrapper on top of file descriptor (epoll) based API. You might be able to do something with hardware that supports interrupts in DPDK and using rte_epoll(). This would let application wait for packet or other sources. Still would need to process packets and may or may not get the data you want; then go back to sleep only if idle. Kind of like the Linux NAPI model. There is an example of using this in l3fwd-power example.