From owner-freebsd-net@freebsd.org Tue May 11 13:04:17 2021 Return-Path: Delivered-To: freebsd-net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 07A8163752E for ; Tue, 11 May 2021 13:04:17 +0000 (UTC) (envelope-from markjdb@gmail.com) Received: from mail-qk1-x72c.google.com (mail-qk1-x72c.google.com [IPv6:2607:f8b0:4864:20::72c]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4FfdRN0KTnz3sVn for ; Tue, 11 May 2021 13:04:15 +0000 (UTC) (envelope-from markjdb@gmail.com) Received: by mail-qk1-x72c.google.com with SMTP id c20so7581180qkm.3 for ; Tue, 11 May 2021 06:04:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=XPQS8qITz+9FbZ5LKyLxFuKo+F9Ous49E7CAFyfKLKc=; b=bUK52SYRl1xe4T1oP4glSM08sn1qnfAvf/WLR30KT8ofRPvCgzW2zfm2/YoIiE6guT ktb4DDpKNb29M/QWhR6LT4LR+WbNm703+2N7Fnj0vpO+/VdSPQ88jplZq1z3PeEN2aHV 8ELfknLsFzQmVDiHuCWMy5mlmA8FldTePovADMQSgFa/+pjX2Y3B2+cav/UT5JWJ1F9Y EhQ7umoP++8Y6+n20Pj1AxwC6DCkJy6UGNWlDe97uo4aPLdBk2i2d/ZQuXd3etQJnRiN ajJ3FQMoY3WN02FxsGYtDWFPev7ilHyRypmNaE02FYi+JghkyOzh0/B7rc1Py6R53IJJ /Uwg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to; bh=XPQS8qITz+9FbZ5LKyLxFuKo+F9Ous49E7CAFyfKLKc=; b=kh+qwD35aDi+XUqzaQC+EiSA6VUGhMJiWSCUmMbM4FnF5TfldOssztG/NLMQyJtzPu lX6W9CZL3ATl6kY8qAF0g6I5f3LEoYXsqhcvhi9W+kOHNZaM1aBIvIo6yFq5Z3Rogsq1 g6rHJqgiiOy32ZM0opUvmvlanUOOQFF4Yx2f9ZVmGkK9X9Bntz7xyTjLL3BAyFZOotL+ Z13kcKsPvIpWlCoFvUtcUGiIbXcFF1d7AubO8+TNph1IR5K9yCr2KOBGLfI9jfvwW9Ui X14fVp9PuYKUDuc5iDArPNxbg2q4aa1ipkVRM31iv6M0aCRTwtn/e3drOejWKj2sSSwN VOFw== X-Gm-Message-State: AOAM532OtOvYnDkRUmAYQ5IGUs+xI2H9DkWgq/Cc7LVbQoIKKZzXW9wH lKMWpF7JtNHiW72d1C0Fn1M= X-Google-Smtp-Source: ABdhPJxInxbbakJwYQCkVPFlt+VZ2tGE/vinVJNWmuW7lu/znahVGx7FIj/NHXE+1LzLYCz1iZcjtQ== X-Received: by 2002:ae9:e80c:: with SMTP id a12mr14448452qkg.85.1620738254105; Tue, 11 May 2021 06:04:14 -0700 (PDT) Received: from nuc ([142.126.164.150]) by smtp.gmail.com with ESMTPSA id w4sm13567602qki.57.2021.05.11.06.04.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 May 2021 06:04:13 -0700 (PDT) Sender: Mark Johnston Date: Tue, 11 May 2021 09:04:14 -0400 From: Mark Johnston To: Francois ten Krooden Cc: Konstantin Belousov , "freebsd-net@freebsd.org" Subject: Re: Vector Packet Processing (VPP) portability on FreeBSD Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Queue-Id: 4FfdRN0KTnz3sVn X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=bUK52SYR; dmarc=none; spf=pass (mx1.freebsd.org: domain of markjdb@gmail.com designates 2607:f8b0:4864:20::72c as permitted sender) smtp.mailfrom=markjdb@gmail.com X-Spamd-Result: default: False [-2.70 / 15.00]; TO_DN_EQ_ADDR_SOME(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[gmail.com:+]; NEURAL_HAM_SHORT(-1.00)[-1.000]; FORGED_SENDER(0.30)[markj@freebsd.org,markjdb@gmail.com]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; FROM_NEQ_ENVFROM(0.00)[markj@freebsd.org,markjdb@gmail.com]; RBL_DBL_DONT_QUERY_IPS(0.00)[2607:f8b0:4864:20::72c:from]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-net@freebsd.org]; DMARC_NA(0.00)[freebsd.org]; SPAMHAUS_ZRD(0.00)[2607:f8b0:4864:20::72c:from:127.0.2.255]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[2607:f8b0:4864:20::72c:from]; MID_RHS_NOT_FQDN(0.50)[]; FREEMAIL_CC(0.00)[gmail.com,freebsd.org]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-net] X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 11 May 2021 13:04:17 -0000 On Tue, May 11, 2021 at 12:43:10PM +0000, Francois ten Krooden wrote: > On Monday, 10 May 2021 16:10 Konstantin Belousov wrote: > > > > On Mon, May 10, 2021 at 11:08:18AM +0000, Francois ten Krooden wrote: > > > 3. What are suitable alternatives for reading information from procfs and > > sysfs on FreeBSD? > > Understand what information is obtained, then what for is it actually used, > > then match it against equivalent FreeBSD approach, then gather the > > required information. > > Thank you. This was basically what we suspected. > One of the ones we are unsure about is what the equivalent of /proc/self/pagemap on Linux would be. > The one idea we had is using procstat_getvmmap from libprocstat, but haven't finished investigating yet. I believe DPDK's libeal uses /proc/pagemap to look up the physical address of large page mappings. Assuming you want to do the same thing, there is the MEM_EXTRACT_PADDR /dev/mem ioctl. It was added specifically for DPDK. See the mem(4) man page for details on its usage.