From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 6 Aug 2001 13:13:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 6 Aug 2001 13:13:38 -0400 Received: from sdsl-208-184-147-195.dsl.sjc.megapath.net ([208.184.147.195]:34352 "EHLO bitmover.com") by vger.kernel.org with ESMTP id ; Mon, 6 Aug 2001 13:13:26 -0400 From: Larry McVoy Date: Mon, 6 Aug 2001 10:13:36 -0700 Message-Id: <200108061713.f76HDaj16575@work.bitmover.com> To: linux-kernel@vger.kernel.org Subject: SIS 630E perf problems? Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I use bookpcs - all in one, really nice form factor - for build machines, firewalls (with a USB ethernet), etc. I used the first generation which had intel i810 graphics (sucked) but had fairly typical performance, competitive for kernel builds with other current platforms at the time. I recently bought a couple of the second generation of these boxes, these have an SIS 630E based motherboard. This has a much better graphics interface, quite reasonable at 1280x1024, and all the other bits work fine under RH 7.1 without tweaking. Performance sucks, however. I did an LMbench run to try and figure out why and it's obvious - the memory latencies are 430 ns - that's 2x more than what is reasonable. I tweaked the various bios settings a bit and could not get it to change much, maybe 20ns but not the 200ns I was looking for. The fact that this system is running a celeron with a dinky cache makes it feel really slow. These boxes with a 633Mhz celeron feel slower than the old boxes with a 400Mhz celeron. All I want to know is if this is in fact the real memory latency for these motherboards. Anyone know for sure? Here's what I could dig out of /proc: PCI bus devices: Host bridge: Silicon Integrated Systems [SiS] 630 Host (rev 32). IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] (rev 208). ISA bridge: Silicon Integrated Systems [SiS] 85C503/5513 (rev 0). Ethernet controller: Silicon Integrated Systems [SiS] SiS900 10/100 Ethernet (rev 129). USB Controller: Silicon Integrated Systems [SiS] 7001 (rev 7). USB Controller: Silicon Integrated Systems [SiS] 7001 (#2) (rev 7). PCI bridge: Silicon Integrated Systems [SiS] 5591/5592 AGP (rev 0). Multimedia audio controller: C-Media Electronics Inc CM8738 (rev 16). Communication controller: C-Media Electronics Inc CM8738 (rev 16). VGA compatible controller: Silicon Integrated Systems [SiS] SiS630 GUI Accelerator+3D (rev 32).