From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yh0-f48.google.com (mail-yh0-f48.google.com [209.85.213.48]) by kanga.kvack.org (Postfix) with ESMTP id 03DEA6B0070 for ; Thu, 11 Dec 2014 10:03:28 -0500 (EST) Received: by mail-yh0-f48.google.com with SMTP id i57so2338286yha.21 for ; Thu, 11 Dec 2014 07:03:27 -0800 (PST) Received: from resqmta-ch2-11v.sys.comcast.net (resqmta-ch2-11v.sys.comcast.net. [2001:558:fe21:29:69:252:207:43]) by mx.google.com with ESMTPS id t35si1510147qge.54.2014.12.11.07.03.26 for (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Thu, 11 Dec 2014 07:03:26 -0800 (PST) Date: Thu, 11 Dec 2014 09:03:24 -0600 (CST) From: Christoph Lameter Subject: Re: [PATCH 0/7] slub: Fastpath optimization (especially for RT) V1 In-Reply-To: <20141211143518.02c781ee@redhat.com> Message-ID: References: <20141210163017.092096069@linux.com> <20141211143518.02c781ee@redhat.com> Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Jesper Dangaard Brouer Cc: akpm@linuxfoundation.org, rostedt@goodmis.org, linux-kernel@vger.kernel.org, Thomas Gleixner , linux-mm@kvack.org, penberg@kernel.org, iamjoonsoo.kim@lge.com On Thu, 11 Dec 2014, Jesper Dangaard Brouer wrote: > It looks like an impressive saving 116 -> 60 cycles. I just don't see > the same kind of improvements with my similar tests[1][2]. This is particularly for a CONFIG_PREEMPT kernel. There will be no effect on !CONFIG_PREEMPT I hope. > I do see the improvement, but it is not as high as I would have expected. Do you have CONFIG_PREEMPT set? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org