From owner-freebsd-questions@FreeBSD.ORG  Mon Nov 10 06:59:52 2014
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id 9FB57A6;
 Mon, 10 Nov 2014 06:59:52 +0000 (UTC)
Received: from mail-wg0-x231.google.com (mail-wg0-x231.google.com
 [IPv6:2a00:1450:400c:c00::231])
 (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits))
 (Client CN "smtp.gmail.com",
 Issuer "Google Internet Authority G2" (verified OK))
 by mx1.freebsd.org (Postfix) with ESMTPS id 31812393;
 Mon, 10 Nov 2014 06:59:52 +0000 (UTC)
Received: by mail-wg0-f49.google.com with SMTP id x13so8136209wgg.8
 for <multiple recipients>; Sun, 09 Nov 2014 22:59:50 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
 h=mime-version:sender:in-reply-to:references:date:message-id:subject
 :from:to:cc:content-type;
 bh=HNvRXRSp8PanPj4UNYqdDnRHON571/q+RAiK9Oxs8oQ=;
 b=F4Ix89gAa8yUsiYs1r1ZDhgIBymCh33BnigFM4HCSIMXvcrQW7gJN+TgJKnQSmzkrb
 EMPasoS18l6UfPGUMxIh+Z/A6R/9KCWfDOrHzuFKrjJrxJudla6c9gGPusrUAlwsXaY6
 aRZcmCTkl60qqFx5dtzgg3lNn5ZUT92tG8dLIcztjXrj2Acp7fHTbcifGadfRCBu8Ysy
 GvrEqJt0q8XKzx4AX8RveqmanRpHmTtd2cNt/GgXOSumYtu0W1+c78jlVAy8Kp5sXR5s
 sxo+ywuJJ2ZV3Drpe4t1Tec0pgAC5TS2MYttoFNo2bHQpawInOeHNctV8FqEcukLfW0f
 6qOA==
MIME-Version: 1.0
X-Received: by 10.180.87.33 with SMTP id u1mr27176011wiz.20.1415602790556;
 Sun, 09 Nov 2014 22:59:50 -0800 (PST)
Sender: adrian.chadd@gmail.com
Received: by 10.216.106.136 with HTTP; Sun, 9 Nov 2014 22:59:50 -0800 (PST)
In-Reply-To: <CABXB=RQxG+y+bqTpTSzEu+GA59Gw7pv+uv39t8WpgxV83BAHzg@mail.gmail.com>
References: <CABXB=RQWxu-d30raZ+FcrnrGsr5gG2Za_=cx8-jCnLSgJDSF=Q@mail.gmail.com>
 <CAJ-Vmon3+ev0wq9sATbdgPKHXLF+Q+R=hX8dbBPJvH-uJD6NqQ@mail.gmail.com>
 <CABXB=RQxG+y+bqTpTSzEu+GA59Gw7pv+uv39t8WpgxV83BAHzg@mail.gmail.com>
Date: Sun, 9 Nov 2014 22:59:50 -0800
X-Google-Sender-Auth: MgJM3mh7AF2QYCzINp1gdmIlYxM
Message-ID: <CAJ-VmonWbfMiv3zaqC3=1L2bxAk5vZsg=dZtpFjs8nSAQS3KHQ@mail.gmail.com>
Subject: Re: How thread-friendly is kevent?
From: Adrian Chadd <adrian@freebsd.org>
To: J David <j.david.lists@gmail.com>
Content-Type: text/plain; charset=UTF-8
Cc: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>,
 "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org>
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.18-1
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions/>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 10 Nov 2014 06:59:52 -0000

On 9 November 2014 17:50, J David <j.david.lists@gmail.com> wrote:
> On Sun, Nov 9, 2014 at 4:17 PM, Adrian Chadd <adrian@freebsd.org> wrote:
>> Are you putting the same FD into multiple threads and hoping that only
>> one note will wake up on one listening kqueue?
>
> That's the behavior observed in testing.  That's somewhat surprising,
> hence the question.

Hm, I'm not sure if that's defined behaviour. :)



-adrian