From owner-freebsd-transport@freebsd.org Thu Jan 21 22:16:33 2016 Return-Path: Delivered-To: freebsd-transport@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 83E8BA8CEE0 for ; Thu, 21 Jan 2016 22:16:33 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-io0-x22a.google.com (mail-io0-x22a.google.com [IPv6:2607:f8b0:4001:c06::22a]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 5A10217A6 for ; Thu, 21 Jan 2016 22:16:33 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: by mail-io0-x22a.google.com with SMTP id g73so71230482ioe.3 for ; Thu, 21 Jan 2016 14:16:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=EWFVvt+f7V+HdpX0Zm4rv8MD+Gw4gLTiE1P+4PE051Y=; b=EkLZS1+v2tRk8+5r4pnFdTAfOIoaEmEfVKsZrN9a6gYHvoG3OR50yc4WZ63QMT4sif T7l03XvYR7V9bQJGvGCgOBiSzUs42it61B+p2mmlaclviwlh6UUH1ZfhVmJqloiKHj2B 5AwLg5B9XPcKQZUG95c+iSRAEkJOBsDwBcbyR8TG66Zij8n+SAFqcNKfR5oMN6ttIkh9 d1IkEwvrEJAj105kLEuriso4hG5f1aJfJRZFN/4+Lk3F8kl7TX7z1r9rIdQkC3Q7J3g6 VP0r8SCReXCVaTxBIHJguuV1lXgRi8gp375UvQCk1xjUHxR7jPJf9f8P8WojQpA0ak/Q ds5A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=EWFVvt+f7V+HdpX0Zm4rv8MD+Gw4gLTiE1P+4PE051Y=; b=AKBKScjhcx7SunFg1AJeBJwROqkRChWfxR3d0Gg9fp3AP47uGiS3p1T0A9g6H9Ppum /ULK47oFYiXDStid0EtKnTVZDC2IgW6eVdksmpeONkE7PvSRSYMd5Fs7FJACY1BPQE3V tpF2z5xW3Eup1nG2pBkMhG+51wTCUTQObhx/6fD55UynGVXcLTvKy8cO0MfYzfsMS7Lc qteNjPXDBp7ezRJnaS65Bg6rREri9BRatIbdrfgbTBliqSV2q2i0271V140I5WCcHKQJ B+0+ExUvtTRlAaRMEo8T3e/NGdcAA3A3FnBnSSQNhl4uLWZTYrNsGnOlWHsPl6N68bU1 srKQ== X-Gm-Message-State: AG10YORqPo3Lo5NeYNsYAALiiYh65cDwSDDjycCn9cWGmodyNplEEhjHxBVCKnPywbKXXsICvD0lBul+jMbUbQ== MIME-Version: 1.0 X-Received: by 10.107.10.217 with SMTP id 86mr234307iok.75.1453414592784; Thu, 21 Jan 2016 14:16:32 -0800 (PST) Received: by 10.36.121.16 with HTTP; Thu, 21 Jan 2016 14:16:32 -0800 (PST) In-Reply-To: References: Date: Thu, 21 Jan 2016 14:16:32 -0800 Message-ID: Subject: Re: Flamegraph of 8KB message bottlenecks From: Adrian Chadd To: Ryan Stone Cc: freebsd-transport@freebsd.org Content-Type: text/plain; charset=UTF-8 X-Mailman-Approved-At: Thu, 21 Jan 2016 23:46:04 +0000 X-BeenThere: freebsd-transport@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Discussions of transport level network protocols in FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 Jan 2016 22:16:33 -0000 A lot of that syscall time is in kevent, doing fget locking. What kind of filedescriptor is being used here? Just a normal socket, or is it kqueue on some /dev entry or something? What's that "idb_" stuff? -a