From mboxrd@z Thu Jan 1 00:00:00 1970 From: epsi@gmx.de Subject: Memory performance / Cache problem Date: Mon, 12 Oct 2009 09:54:09 +0200 Message-ID: <20091012075409.186580@gmx.net> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mail.gmx.net ([213.165.64.20]:41791 "HELO mail.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1753549AbZJLHy6 (ORCPT ); Mon, 12 Oct 2009 03:54:58 -0400 Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: linux-omap@vger.kernel.org I found the memory performance of newer kernels are quit poor on an EVM= -Omap3 board. It works with 2-6 times performance on the old 2.6.22 ker= nel from TI's PSP. Possible reasons: - problem in config the kernel (did omap3_evm_defconfig) - problem in kernel - kernel expects some settings from uboot, which are not done there I have tried the 2.6.29rc3 (from TI's PSP) and the 2.6.31 from git-tree= =2E Both behave quite simular: Transport in MByte: memcpy =3D 204.073, loop4 =3D 183.212, loop1 =3D 81.693, rand = =3D 4.534 while the 22 kernel: memcpy =3D 453.932, loop4 =3D 469.934, loop1 =3D 125.031, rand =3D 29.631 Can someone give me help or can at least confirm that? Best regards Steffen --=20 GRATIS f=FCr alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html