Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761143AbXFJQqo (ORCPT ); Sun, 10 Jun 2007 12:46:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755211AbXFJQqe (ORCPT ); Sun, 10 Jun 2007 12:46:34 -0400 Received: from wa-out-1112.google.com ([209.85.146.182]:16711 "EHLO wa-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752640AbXFJQqd (ORCPT ); Sun, 10 Jun 2007 12:46:33 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:mime-version:content-type:content-transfer-encoding:content-disposition; b=FePZT2UpNUvjMr7ZKrbhCS6lK6tdoHSGvQI08fc3V8VcmkmjCI+RPuc8uz7syMkLaKpPHAZT83kvM/iTDwLsfHHSwDDbAU1xgpouWLdBulKNT0EhA4m5WaXJ16gJRrMu+tlDFUii57mI/N4vsINbJaMysxvOq1KogP/kCqyYRB0= Message-ID: <5bdc1c8b0706100946k3acd6374uac8248e78f97433d@mail.gmail.com> Date: Sun, 10 Jun 2007 09:46:31 -0700 From: "Mark Knecht" To: linux-kernel Subject: 2.6.21-rt9 - IRQ23 consuming a steady 2.7% of CPU Cc: "Ingo Molnar" , "Lee Revell" MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7668 Lines: 174 Hi, I've been running 2.6.21.3-rt9 and a couple of -rc predecessors for a few weeks and this minor problem has been consistent on all versions I've run. On this AMD64 machine I still have 2.6.17-rt8 and 2.6.18-rt7 and neither of those versions cause the problem. I am currently building the matching vanilla kernel as well as the 2.6.22-rc3 kernel to see if it's in those versions. I see today that the same problem has been reported by another AMD64 user on a distribution mail list so I think the problem isn't specific to my hardware anymore. I had previously thought so and therefore didn't report this right away thinking I'd do more debug. http://search.gmane.org/?query=IRQ+23&group=gmane.linux.distributions.64studio Since my IRQ23 is shared on my machine by Ethernet and USB I have tried detaching all network cables and turning off all USB devices but the problem persists. I'll report back what happens with the vanilla-kernels. If a binary regression search is required of everything between 2.6.18 and 2.6.21 to look for where the problem crept in that will take some time so any guidance on where to start would be helpful. If more info is desired please don't hesitate to ask. Cheers, Mark mark@lightning ~ $ uname -a Linux lightning 2.6.21.3-rt9 #1 PREEMPT RT Sat Jun 9 09:49:32 PDT 2007 x86_64 AMD Athlon(tm) 64 Processor 3000+ AuthenticAMD GNU/Linux mark@lightning ~ $ mark@lightning ~ $ top top - 10:02:17 up 3 min, 2 users, load average: 0.00, 0.00, 0.00 Tasks: 88 total, 2 running, 86 sleeping, 0 stopped, 0 zombie Cpu(s): 1.3%us, 0.0%sy, 0.0%ni, 95.7%id, 0.0%wa, 3.0%hi, 0.0%si, 0.0%st Mem: 1026612k total, 190316k used, 836296k free, 8124k buffers Swap: 2008084k total, 0k used, 2008084k free, 74616k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 947 root -76 -5 0 0 0 S 2.7 0.0 0:05.58 IRQ-23 9533 root 15 0 324m 13m 7420 S 1.3 1.4 0:03.24 X 1 root 15 0 2668 588 500 S 0.0 0.1 0:00.27 init 2 root RT 0 0 0 0 S 0.0 0.0 0:00.00 posix_cpu_timer 3 root -51 0 0 0 0 S 0.0 0.0 0:00.00 softirq-high/0 mark@lightning ~ $ cat /proc/interrupts CPU0 0: 212 IO-APIC-edge timer 1: 296 IO-APIC-edge i8042 6: 3 IO-APIC-edge floppy 7: 0 IO-APIC-edge lpptest 8: 0 IO-APIC-edge rtc 9: 0 IO-APIC-fasteoi acpi 12: 8690 IO-APIC-edge i8042 14: 62 IO-APIC-edge ide0 16: 0 IO-APIC-fasteoi hdsp 18: 14496 IO-APIC-fasteoi ohci1394, radeon@pci:0000:01:00.0 20: 2 IO-APIC-fasteoi ehci_hcd:usb1 21: 7724 IO-APIC-fasteoi libata 22: 0 IO-APIC-fasteoi libata, NVidia CK804 23: 1739277 IO-APIC-fasteoi ohci_hcd:usb2, eth0 NMI: 0 LOC: 59688 ERR: 0 mark@lightning ~ $ mark@lightning ~ $ uname -a Linux lightning 2.6.18-rt7 #4 PREEMPT Sun Apr 8 17:32:31 PDT 2007 x86_64 AMD Athlon(tm) 64 Processor 3000+ AuthenticAMD GNU/Linux mark@lightning ~ $ mark@lightning ~ $ top top - 10:09:51 up 1 min, 2 users, load average: 0.00, 0.00, 0.00 Tasks: 83 total, 1 running, 82 sleeping, 0 stopped, 0 zombie Cpu(s): 1.7%us, 0.3%sy, 0.0%ni, 95.4%id, 2.6%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 1026840k total, 185688k used, 841152k free, 7904k buffers Swap: 2008084k total, 0k used, 2008084k free, 74172k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 9024 root 15 0 324m 13m 7072 S 1.7 1.3 0:01.00 X 7 root -2 0 0 0 0 S 0.3 0.0 0:01.02 softirq-block/0 9912 mark 15 0 10600 1304 960 R 0.3 0.1 0:00.01 top 1 root 15 0 2676 588 500 S 0.0 0.1 0:00.31 init 2 root RT 0 0 0 0 S 0.0 0.0 0:00.00 posix_cpu_timer 3 root -2 0 0 0 0 S 0.0 0.0 0:00.00 softirq-high/0 lightning ~ # lspci 00:00.0 Memory controller: nVidia Corporation CK804 Memory Controller (rev a3) 00:01.0 ISA bridge: nVidia Corporation CK804 ISA Bridge (rev a3) 00:01.1 SMBus: nVidia Corporation CK804 SMBus (rev a2) 00:02.0 USB Controller: nVidia Corporation CK804 USB Controller (rev a2) 00:02.1 USB Controller: nVidia Corporation CK804 USB Controller (rev a3) 00:04.0 Multimedia audio controller: nVidia Corporation CK804 AC'97 Audio Controller (rev a2) 00:06.0 IDE interface: nVidia Corporation CK804 IDE (rev f2) 00:07.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller (rev f3) 00:08.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller (rev f3) 00:09.0 PCI bridge: nVidia Corporation CK804 PCI Bridge (rev a2) 00:0a.0 Bridge: nVidia Corporation CK804 Ethernet Controller (rev a3) 00:0b.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3) 00:0c.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3) 00:0d.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3) 00:0e.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3) 00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration 00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map 00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller 00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control 01:00.0 VGA compatible controller: ATI Technologies Inc RV370 5B60 [Radeon X300 (PCIE)] 01:00.1 Display controller: ATI Technologies Inc RV370 [Radeon X300SE] 05:06.0 Multimedia audio controller: Xilinx Corporation RME Hammerfall DSP (rev 68) 05:08.0 FireWire (IEEE 1394): Texas Instruments TSB82AA2 IEEE-1394b Link Layer Controller (rev 01) lightning ~ # lightning ~ # lsmod Module Size Used by it87 22032 0 hwmon_vid 2880 1 it87 i2c_isa 6144 1 it87 eeprom 7248 0 snd_seq_midi 7296 0 snd_pcm_oss 40160 0 snd_mixer_oss 15168 1 snd_pcm_oss snd_seq_dummy 3460 0 snd_seq_oss 29696 0 snd_seq_midi_event 7040 2 snd_seq_midi,snd_seq_oss snd_seq 48000 6 snd_seq_midi,snd_seq_dummy,snd_seq_oss,snd_seq_midi_event realtime 9416 0 sbp2 22084 0 radeon 115488 2 drm 84392 3 radeon snd_hdsp 47812 0 snd_rawmidi 21216 2 snd_seq_midi,snd_hdsp snd_seq_device 7252 5 snd_seq_midi,snd_seq_dummy,snd_seq_oss,snd_seq,snd_rawmidi snd_hwdep 8456 1 snd_hdsp ohci1394 31368 0 ieee1394 91024 2 sbp2,ohci1394 snd_intel8x0 32296 1 snd_ac97_codec 107288 1 snd_intel8x0 ac97_bus 3712 1 snd_ac97_codec snd_pcm 74440 4 snd_pcm_oss,snd_hdsp,snd_intel8x0,snd_ac97_codec snd_timer 20424 2 snd_seq,snd_pcm snd 52264 14 snd_pcm_oss,snd_mixer_oss,snd_seq_oss,snd_seq,snd_hdsp,snd_rawmidi,snd_seq_device,snd_hwdep,snd_intel8x0,snd_ac97_codec,snd_pcm,snd_timer snd_page_alloc 8208 3 snd_hdsp,snd_intel8x0,snd_pcm k8temp 5888 0 i2c_nforce2 6016 0 i2c_core 21056 4 it87,i2c_isa,eeprom,i2c_nforce2 lightning ~ # - 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