From owner-freebsd-performance@FreeBSD.ORG Thu Aug 19 09:31:06 2010 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D7A58106566B for ; Thu, 19 Aug 2010 09:31:06 +0000 (UTC) (envelope-from dbmelnikov@gmail.com) Received: from mail-ew0-f54.google.com (mail-ew0-f54.google.com [209.85.215.54]) by mx1.freebsd.org (Postfix) with ESMTP id 6DC288FC19 for ; Thu, 19 Aug 2010 09:31:06 +0000 (UTC) Received: by ewy26 with SMTP id 26so1227874ewy.13 for ; Thu, 19 Aug 2010 02:31:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:date:message-id :subject:from:to:content-type; bh=Ink6UqZFwNTyBPU2Qg5tUZoqKATmYyTOGABbUtvPZt8=; b=jXX2GCuOfHmmgvbT3NFAxUEXgA5i+9NrZUoN6WX56ToKXoEKIqpH/nAzYmhdVFRbFP rT4/mE9qgbl+MYJ7lj4EreSAzmnvmvrKggbds/ph7Sec6btAlI3fjGRlFgLyeELW8I/I n9Z0gkQYbvi0VekPNyoBlhklb3JvW+z7nXZVQ= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=D6ED4R+vD8A9C7lQ8rIsFMefS0KQm5BuPxKQ5m7IxlTzfcB55pXuHeoPqb3jdhJ3wh AgpCFAVQIacIb8R4rqMQiPxqpnXgNWTwNGs1WC1gC5QEQ1ROO5voNyu+T0TxeIlfpCKS Ys22VWwgTjCa4EU+eoA9mV+Xf3p5e8yxUqts8= MIME-Version: 1.0 Received: by 10.213.8.200 with SMTP id i8mr1378119ebi.18.1282208620674; Thu, 19 Aug 2010 02:03:40 -0700 (PDT) Received: by 10.213.110.204 with HTTP; Thu, 19 Aug 2010 02:03:40 -0700 (PDT) Date: Thu, 19 Aug 2010 13:03:40 +0400 Message-ID: From: Denis Melnikov To: freebsd-performance@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 Subject: Does ULE restrict available RAM? X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 19 Aug 2010 09:31:06 -0000 Hi! 7.0-RELEASE (amd64) RAM 33 GB (8*4096+2*512) 2 quad-core Xeons The server ran GENERIC kernel with 4BSD scheduler earlier. When loaded with ULE scheduler it has missed 8GB. dmesg: usable memory = 26829983744 (25587 MB) avail memory = 25999904768 (24795 MB) # dmidecode -t 17 | grep Size Size: 512 MB Size: 4096 MB Size: No Module Installed Size: 512 MB Size: 4096 MB Size: No Module Installed Size: 4096 MB Size: 4096 MB Size: No Module Installed Size: 4096 MB Size: 4096 MB Size: No Module Installed It looks like BIOS-level problem, but... maybe ULE restricts RAM? Hopefully, Denis