From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) by finch.gentoo.org (Postfix) with ESMTP id 5FE441381F3 for ; Thu, 2 May 2013 20:33:25 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 0A35DE0B2B; Thu, 2 May 2013 20:33:21 +0000 (UTC) Received: from qmta03.westchester.pa.mail.comcast.net (qmta03.westchester.pa.mail.comcast.net [76.96.62.32]) by pigeon.gentoo.org (Postfix) with ESMTP id 48C1FE09C1 for ; Thu, 2 May 2013 20:33:20 +0000 (UTC) Received: from omta08.westchester.pa.mail.comcast.net ([76.96.62.12]) by qmta03.westchester.pa.mail.comcast.net with comcast id WyJb1l0080Fqzac538ZKLs; Thu, 02 May 2013 20:33:19 +0000 Received: from ajax ([24.11.47.14]) by omta08.westchester.pa.mail.comcast.net with comcast id X8ZK1l0130JMh7c3U8ZKUE; Thu, 02 May 2013 20:33:19 +0000 Date: Thu, 2 May 2013 16:33:09 -0400 From: Frank Peters To: gentoo-amd64@lists.gentoo.org Subject: [gentoo-amd64] Advice On Enabling Transparent Hugepage Message-Id: <20130502163309.70844284755c7809c1f7cdbd@comcast.net> X-Mailer: Sylpheed 3.3.0 (GTK+ 2.24.17; x86_64-unknown-linux-gnu) Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-amd64@lists.gentoo.org Reply-to: gentoo-amd64@lists.gentoo.org Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20121106; t=1367526799; bh=cDsg+gDFqrB1/TPjBW/qHUAatJi/GheWMK6ZGljcBqU=; h=Received:Received:Date:From:To:Subject:Message-Id:Mime-Version: Content-Type; b=Yqr/NghWGt4FOvzRJDD9EgMuYt7kOaaMAVjnhBNaI2j8NfW9kBpXtGfen2bfnXupL NCV2LFRkpmplHliZ22zUeTIIbmAZ7PZo1OW9+lZapiuPGV704KIpXCUJoZII9PpqJ8 ILP5WIKYd0qwpg4wDKvUU8WjEwYKqJkwhkkNj0ryDsTpZfb+gbMJEpdbKCA4iHHOas Oqp8pzh6sb8WRyCXlGiv1bo9Lr1UukxMNljGVVf6uF4Bg+n7HHs7qMjTvXvqw2u26I m7dn711nRNxEe2VmbfnMpob2Vfy+Rx7YFYZI1i+eiZzSF2yeOCr2LBhiYYB7u0aF+k LL+ZuKGbk6LPQ== X-Archives-Salt: 92dbacdf-5f7c-4559-9794-173f8c2064e0 X-Archives-Hash: 29121df65e8447476dbf7174c97c9115 During kernel configuration there is an option called CONFIG_TRANSPARENT_HUGEPAGE which allows the use of Transparent Hugepages or application memory pages larger than the traditional 4K size. This option has been available for a while but I've never enabled it. However, it would seem like a good idea to use. Searching for more information I can find no comments on actual Hugepage performance for a simple desktop Linux system. Can anyone verify or refute the idea that Transparent Hugepages will lead to improvements on a desktop system? Does an application have to specifically request Hugepages or does the allocation occur for all applications? Frank Peters