From owner-freebsd-hackers@FreeBSD.ORG Wed Apr 1 22:55:13 2015 Return-Path: Delivered-To: freebsd-hackers@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 B0ED8264; Wed, 1 Apr 2015 22:55:13 +0000 (UTC) Received: from mail-ie0-x231.google.com (mail-ie0-x231.google.com [IPv6:2607:f8b0:4001:c03::231]) (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 72EB68E7; Wed, 1 Apr 2015 22:55:13 +0000 (UTC) Received: by iedm5 with SMTP id m5so56117436ied.3; Wed, 01 Apr 2015 15:55:12 -0700 (PDT) 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=VbzJLTYIR5L4vfq9uXXQo5nBhLOWj7oI4yuSPT2zC4Q=; b=l9JwfEJ1QPJQbCGGumVidGfKaBHIcQEx6Duj0EsnmmzXipDzZxnpZmAHfMubeiargJ U34utaPI+jUMcCja4m0IBnO+KQaa5KNOpyfHHmYfA3crtYslB4b9405W5CTOds++hDqx NvZ4GpBdxNSavQRrC95mYoGk5xFfObcV5pVbCOKyBHm/b5BUlS/eyzOg64lHRabpJ7ky 90PKszQGp4xk82lXnDjRmiugOc90cWABkKrWGouNroUUizmt+LEn8aJkN8VL23JDWwFc aHvOipuC6Cg8+o3fQ3enRMde09NgYXkSXWZy8hnoxjslpeJVISZwY0Dx1IXe9yM6up8M mUxA== MIME-Version: 1.0 X-Received: by 10.43.82.137 with SMTP id ac9mr20510509icc.37.1427928912875; Wed, 01 Apr 2015 15:55:12 -0700 (PDT) Sender: adrian.chadd@gmail.com Received: by 10.36.17.194 with HTTP; Wed, 1 Apr 2015 15:55:12 -0700 (PDT) In-Reply-To: <551C702D.2070009@gmail.com> References: <551BC57D.5070101@gmail.com> <551C5A82.2090306@gmail.com> <20150401212303.GB2379@kib.kiev.ua> <551C702D.2070009@gmail.com> Date: Wed, 1 Apr 2015 15:55:12 -0700 X-Google-Sender-Auth: hIVAUzvCpL9G-REGkq_zJZvpHxY Message-ID: Subject: Re: NVMe performance 4x slower than expected From: Adrian Chadd To: Tobias Oberstein Content-Type: text/plain; charset=UTF-8 Cc: Konstantin Belousov , "freebsd-hackers@freebsd.org" , Michael Fuckner , Jim Harris , Alan Somers X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 01 Apr 2015 22:55:13 -0000 Out of curiousity - why not cap how many MSI's are created? Why's it need one per CPU? -a