Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262018AbTFBT13 (ORCPT ); Mon, 2 Jun 2003 15:27:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262267AbTFBT13 (ORCPT ); Mon, 2 Jun 2003 15:27:29 -0400 Received: from camus.xss.co.at ([194.152.162.19]:44042 "EHLO camus.xss.co.at") by vger.kernel.org with ESMTP id S262018AbTFBT1U (ORCPT ); Mon, 2 Jun 2003 15:27:20 -0400 Message-ID: <3EDBA83B.5050406@xss.co.at> Date: Mon, 02 Jun 2003 21:40:43 +0200 From: Andreas Haumer Organization: xS+S User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.3) Gecko/20030312 X-Accept-Language: en-us, en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: system clock speed too high? X-Enigmail-Version: 0.74.0.0 X-Enigmail-Supports: pgp-inline, pgp-mime Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7112 Lines: 167 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi! (I've already reported this previously as post scriptum to a different bugreport, so it might have slipped through unnoticed...) I have a quite strange phenomenon here: I see a ~2.5 times speed up of system time on a Asus AP1700-S5 server with Linux-2.4.21-rc6-ac1. Simple proof: a "sleep 300" command terminates after exactly 120 seconds of wall clock time. Or just look at this: root@setup:~ {544} $ ntpdate ntp.xss.co.at; ntpdate ntp.xss.co.at; sleep 300; ntpdate ntp.xss.co.at 2 Jun 21:24:45 ntpdate[3768]: step time server 194.152.162.17 offset -38.679740 sec 2 Jun 21:24:45 ntpdate[3769]: adjust time server 194.152.162.17 offset -0.069998 sec 2 Jun 21:26:45 ntpdate[3786]: step time server 194.152.162.17 offset -180.053781 sec Impressive, isn't it? This "acceleration" of time shows with other time measures, like "date", system uptime, process time, etc., too. (HZ is still defined as 100, I haven't changed anything in the kernel sources) System info: Asus AP1700-S5, Asus PR-DLS533 Motherboard, Intel Xeon 2.4GHz CPU, 512MB RAM root@setup:~ {545} $ uname -a Linux setup 2.4.21-rc6-ac1 #1 SMP Sat May 31 20:04:18 CEST 2003 i686 unknown root@setup:~ {546} $ lspci -v 00:00.0 Host bridge: ServerWorks CNB20-HE Host Bridge (rev 31) Flags: fast devsel 00:00.1 Host bridge: ServerWorks CNB20-HE Host Bridge Flags: fast devsel 00:00.2 Host bridge: ServerWorks CNB20-HE Host Bridge Flags: fast devsel 00:02.0 Ethernet controller: Intel Corp. 82540EM Gigabit Ethernet Controller (rev 02) Subsystem: Intel Corp. 82540EM Gigabit Ethernet Controller Flags: bus master, 66Mhz, medium devsel, latency 32, IRQ 18 Memory at fd800000 (32-bit, non-prefetchable) [size=128K] I/O ports at d800 [size=64] Capabilities: [dc] Power Management version 2 Capabilities: [e4] PCI-X non-bridge device. Capabilities: [f0] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable- 00:03.0 VGA compatible controller: ATI Technologies Inc Rage XL (rev 27) (prog-if 00 [VGA]) Subsystem: ATI Technologies Inc: Unknown device 8008 Flags: bus master, stepping, medium devsel, latency 32, IRQ 46 Memory at fc000000 (32-bit, non-prefetchable) [size=16M] I/O ports at d400 [size=256] Memory at fb800000 (32-bit, non-prefetchable) [size=4K] Expansion ROM at febe0000 [disabled] [size=128K] Capabilities: [5c] Power Management version 2 00:0f.0 ISA bridge: ServerWorks CSB5 South Bridge (rev 93) Subsystem: ServerWorks CSB5 South Bridge Flags: bus master, medium devsel, latency 32 00:0f.1 IDE interface: ServerWorks CSB5 IDE Controller (rev 93) (prog-if 8a [Master SecP PriP]) Subsystem: ServerWorks CSB5 IDE Controller Flags: bus master, medium devsel, latency 64 I/O ports at I/O ports at I/O ports at I/O ports at I/O ports at a800 [size=16] 00:0f.2 USB Controller: ServerWorks OSB4/CSB5 OHCI USB Controller (rev 05) (prog-if 10 [OHCI]) Subsystem: ServerWorks OSB4/CSB5 OHCI USB Controller Flags: bus master, medium devsel, latency 32, IRQ 11 Memory at fb000000 (32-bit, non-prefetchable) [size=4K] 00:0f.3 Host bridge: ServerWorks GCLE Host Bridge Subsystem: ServerWorks: Unknown device 0230 Flags: bus master, medium devsel, latency 0 00:10.0 Host bridge: ServerWorks: Unknown device 0101 (rev 03) Flags: 66Mhz, medium devsel Capabilities: [60] 00:10.2 Host bridge: ServerWorks: Unknown device 0101 (rev 03) Flags: 66Mhz, medium devsel Capabilities: [60] 00:11.0 Host bridge: ServerWorks: Unknown device 0101 (rev 03) Flags: 66Mhz, medium devsel Capabilities: [60] 00:11.2 Host bridge: ServerWorks: Unknown device 0101 (rev 03) Flags: 66Mhz, medium devsel Capabilities: [60] 02:04.0 SCSI storage controller: LSI Logic / Symbios Logic 53c1030 (rev 07) Subsystem: LSI Logic / Symbios Logic: Unknown device 1000 Flags: bus master, 66Mhz, medium devsel, latency 72, IRQ 22 I/O ports at a000 [size=256] Memory at fa000000 (64-bit, non-prefetchable) [size=64K] Memory at f9800000 (64-bit, non-prefetchable) [size=64K] Expansion ROM at fe900000 [disabled] [size=1M] Capabilities: [50] Power Management version 2 Capabilities: [58] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable- Capabilities: [68] 02:04.1 SCSI storage controller: LSI Logic / Symbios Logic 53c1030 (rev 07) Subsystem: LSI Logic / Symbios Logic: Unknown device 1000 Flags: bus master, 66Mhz, medium devsel, latency 72, IRQ 23 I/O ports at 9800 [size=256] Memory at f9000000 (64-bit, non-prefetchable) [size=64K] Memory at f8800000 (64-bit, non-prefetchable) [size=64K] Expansion ROM at fe800000 [disabled] [size=1M] Capabilities: [50] Power Management version 2 Capabilities: [58] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable- Capabilities: [68] 03:02.0 Ethernet controller: Intel Corp. 82544GC Gigabit Ethernet Controller (LOM) (rev 02) Subsystem: Intel Corp.: Unknown device 110d Flags: bus master, 66Mhz, medium devsel, latency 32, IRQ 19 Memory at f8000000 (64-bit, non-prefetchable) [size=128K] Memory at f7800000 (64-bit, non-prefetchable) [size=128K] I/O ports at 9400 [size=32] Expansion ROM at fe7e0000 [disabled] [size=128K] Capabilities: [dc] Power Management version 2 Capabilities: [e4] PCI-X non-bridge device. Capabilities: [f0] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable- root@setup:~ {547} $ cat /proc/interrupts CPU0 CPU1 0: 1737732 1760169 IO-APIC-edge timer 1: 260 260 IO-APIC-edge keyboard 2: 0 0 XT-PIC cascade 4: 10 10 IO-APIC-edge serial 15: 5 17 IO-APIC-edge ide1 18: 22903530 23147515 IO-APIC-level eth0 22: 1695902 1726918 IO-APIC-level ioc0 23: 25 17 IO-APIC-level ioc1 NMI: 0 0 LOC: 1398848 1398847 ERR: 0 MIS: 0 Any ideas? - - andreas - -- Andreas Haumer | mailto:andreas@xss.co.at *x Software + Systeme | http://www.xss.co.at/ Karmarschgasse 51/2/20 | Tel: +43-1-6060114-0 A-1100 Vienna, Austria | Fax: +43-1-6060114-71 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQE+26g5xJmyeGcXPhERAj4tAJ98iFyniQ2N3P0jKkfQqla2GBVKXwCbBr36 +2kB0HBIKcVXA+lkxAXeVMU= =Xk1O -----END PGP SIGNATURE----- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/