From owner-freebsd-net@freebsd.org Tue Aug 18 22:04:39 2020 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 A07A13A8D2A for ; Tue, 18 Aug 2020 22:04:39 +0000 (UTC) (envelope-from rysto32@gmail.com) Received: from mail-ed1-x532.google.com (mail-ed1-x532.google.com [IPv6:2a00:1450:4864:20::532]) (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 4BWQ1f2Hqpz3W2X for ; Tue, 18 Aug 2020 22:04:38 +0000 (UTC) (envelope-from rysto32@gmail.com) Received: by mail-ed1-x532.google.com with SMTP id t15so16448118edq.13 for ; Tue, 18 Aug 2020 15:04:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=j2FG7v8DiqSYEiNGTDkqH3q4NcIQMIfjdYegBoMEDJ4=; b=mUyCVfio+mmUyIsiCv2GFf96rX6F1/iBv5tpiXCVTwEPzX8cZfLChnL6zh4eex5KWj wwLbAfypBD1ysRmLf75YiqeBoBbZSRhwtQOUcb1kLKSRSLpzeu5Mk3GOVzN11tzZh1Rf civVhbGpJ2CvG83x1C2CK1X26j3eaOJvh9u9AzAUxxIwQUKiynGXV/sdJE2nXNdV3OY9 Mkj2AxKMLcPUKhgI4fAAgjZJVSl6uNZpIotVnOjTRyYqxBD2N6oh+edOpjEf6wjzGVRI PBhzEhQTcf9OeRnJN/zd8EKIJFoQ25PFls0d6lumpPHyvVCQYE1603aRs1MbT7jyXZX7 ylTQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=j2FG7v8DiqSYEiNGTDkqH3q4NcIQMIfjdYegBoMEDJ4=; b=f+LkvQLzMhET1Kd/hpE33KwbDUHqjK/y0Mv3njRB99/1VVnVZhEtC4F4h2JpozBUR0 XSxQ5H56xYtsD4vNcYZRrxhCuQ8i9ZT0P+rCWpEds+O9SeAU/BlpagdsUc5fMsl+rt/P kAgfZXfhXroA0oopB33yOE93UVeT7qpGCgNEpXXfYnh4BjIaziT4i/r3sdotvyYlM5E1 y1nx3r90jmXQN5hqYMXMuxhWwY/Y+Gs6pf+Jlr4sCNNxis+xeezce4qGJ44UEVg9ViNZ eHaD8AXkPL7PYfK+I12qmUHuUeenXXRIDZ4sG4whmvgq0/y35WrV70Cb24YcL5E56Ktz PQDw== X-Gm-Message-State: AOAM532/izh5/Qjo+LG0ghANdm7b4nx19/FQYoSbvZnYKJ6bbrjHUDhi 2IETSL3mtoyO9RzVgI1UxX7YeOKWS8HPE+NkN2k= X-Google-Smtp-Source: ABdhPJwv4eRgXDvlc3wtu94wkd9Gi2KgPaOWEtxulSMHrRmtTlRV2j++/l9CvZOM2cyP3OvK4kn59ts4lJtNqpEba7Y= X-Received: by 2002:a05:6402:2206:: with SMTP id cq6mr22258022edb.349.1597788276423; Tue, 18 Aug 2020 15:04:36 -0700 (PDT) MIME-Version: 1.0 References: <20200818205725.2e03c8cb@x23> <20200818234416.5aec459c@x23> In-Reply-To: <20200818234416.5aec459c@x23> From: Ryan Stone Date: Tue, 18 Aug 2020 18:04:24 -0400 Message-ID: Subject: Re: Is anybody using ng_pipe? To: Marko Zec Cc: freebsd-net Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 4BWQ1f2Hqpz3W2X X-Spamd-Bar: / Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=mUyCVfio; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of rysto32@gmail.com designates 2a00:1450:4864:20::532 as permitted sender) smtp.mailfrom=rysto32@gmail.com X-Spamd-Result: default: False [0.02 / 15.00]; ARC_NA(0.00)[]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; RCVD_TLS_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim]; R_SPF_ALLOW(-0.20)[+ip6:2a00:1450:4000::/36:c]; FREEMAIL_FROM(0.00)[gmail.com]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-net@freebsd.org]; NEURAL_SPAM_SHORT(0.02)[0.015]; TO_MATCH_ENVRCPT_SOME(0.00)[]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[gmail.com:+]; RCPT_COUNT_TWO(0.00)[2]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; RCVD_IN_DNSWL_NONE(0.00)[2a00:1450:4864:20::532:from]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US]; SUBJECT_ENDS_QUESTION(1.00)[]; MAILMAN_DEST(0.00)[freebsd-net]; RCVD_COUNT_TWO(0.00)[2] X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.33 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, 18 Aug 2020 22:04:39 -0000 On Tue, Aug 18, 2020 at 5:43 PM Marko Zec wrote: > Since in ng_pipe we define BER as an one error in BER bits (integer > value), wouldn't your formula P = 1 - BER yield results less than or > equal to zero for all non-zero values of BER? The domain of P is > [0..1], so that won't fly. > > Your analysis seems to be based on an assumption that the BER > parameter is given as a multiplier to 0.5**48, which it is not. > > The proper fix would be to clarify the current BER parameter semantics > in ng_pipe(4), not to break bridges with the existing scripts / software > which rely on ng_pipe. > > Cheers, > > Marko The manpage defined the BER parameter as follows: u_int64_t ber; /* errors per 2^48 bits */ If we instead want to change the documentation to match the implementation, that's fine too.