Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263990AbTF2UCK (ORCPT ); Sun, 29 Jun 2003 16:02:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263894AbTF2UCK (ORCPT ); Sun, 29 Jun 2003 16:02:10 -0400 Received: from slimnet.xs4all.nl ([194.109.194.192]:30701 "EHLO gatekeeper.slim") by vger.kernel.org with ESMTP id S263990AbTF2UCD (ORCPT ); Sun, 29 Jun 2003 16:02:03 -0400 Subject: [2.5.73] What causes this high interrupt count? From: Jurgen Kramer To: linux-kernel@vger.kernel.org Content-Type: text/plain Message-Id: <1056917780.4001.16.camel@paragon.slim> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.0 (1.4.0-1) Date: 29 Jun 2003 22:16:20 +0200 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1791 Lines: 52 Hi, With 2.5.73 with ACPI enabled on my P4 HT system irq 18 seems to be very busy: CPU0 CPU1 0: 633529 76869 IO-APIC-edge timer 2: 0 0 XT-PIC cascade 9: 0 0 IO-APIC-level acpi 14: 12139 0 IO-APIC-edge ide0 15: 2 0 IO-APIC-edge ide1 16: 58707 0 IO-APIC-level uhci-hcd, uhci-hcd, nvidia 17: 56840 0 IO-APIC-level Intel ICH5 18: 88494437 48181320 IO-APIC-level ide2, uhci-hcd 19: 15975 0 IO-APIC-level uhci-hcd 20: 183 0 IO-APIC-level ohci1394 21: 1647 0 IO-APIC-level eth0 23: 68 0 IO-APIC-level ehci_hcd NMI: 0 0 LOC: 710285 710628 ERR: 0 MIS: 0 ide2 is the onboard Intel SATA (ICH5) controller. I am not sure what is causing these interrupts. Top shows a lot of CPU load being generated caused by the high interrupt count: 81 processes: 80 sleeping, 1 running, 0 zombie, 0 stopped CPU0 states: 2.0% user 58.0% system 0.0% nice 0.0% iowait 40.0% idle CPU1 states: 3.0% user 0.0% system 0.0% nice 0.0% iowait 97.0% idle Mem: 515480k av, 198452k used, 317028k free, 0k shrd, 14760k buff 122252k active, 50596k inactive Swap: 787176k av, 0k used, 787176k free 94040k cached I've had the same problem with 2.4.21 plus a recent ACPI. What can be the culprit? Cheers, Jurgen - 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/