Messages in this thread | | | From | Shawn Starr <> | Subject | [2.6.33-rc1] System timer flooding bus on Lenovo Thinkpad W500 laptop in x86_64 | Date | Mon, 21 Dec 2009 13:12:52 -0500 |
| |
Hello kernel devs,
I am noticing a serious problem with the system timer flooding the bus with many interrupts for no reason. I have compiled the kernel with tickless enabled.
Can someone provide me some debugging to find out why this is happening?
As a comparsion my quad core box has no such issue: (Running 2.6.32-rc7) x86_64 0: 42 4 1 1 IO-APIC-edge timer
my Lenovo ThinkPad W500 (latest BIOS 3.11) laptop shows the system timer flooding the bus (Running 2.6.33-rc1) x86_64 0: 66775 70429 IO-APIC-edge timer <-- keeps rising, rapidly
and afew minutes ...
0: 119849 124505 IO-APIC-edge timer
Same for Rescheduling interrupts rising just as fast with the timer.
This does not look right, powertop shows:
40.0% ( 62.1) <kernel IPI> : Rescheduling interrupts 22.9% ( 35.6) <interrupt> : extra timer interrupt 17.0% ( 26.4) <interrupt> : iwlagn
and another sample...
54.6% (144.8) <kernel IPI> : Rescheduling interrupts 14.6% ( 38.8) <interrupt> : extra timer interrupt 8.5% ( 22.6) <interrupt> : iwlagn 6.5% ( 17.2) <interrupt> : uhci_hcd:usb6, radeon@pci:0000:01:00.0 6.5% ( 17.2) USB device 6-1 : Microsoft Basic Optical Mouse v2.0 (Microsoft )
There is no cause for the rescheduling interrupts and extra timer interrupt to wakeup the CPUs so much? Are there any timer issues?
cpuinfo:
processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 23 model name : Intel(R) Core(TM)2 Duo CPU T9400 @ 2.53GHz stepping : 10 cpu MHz : 800.000 cache size : 6144 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good aperfmperf pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm ida tpr_shadow vnmi flexpriority bogomips : 5054.98 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management:
Below is lspci information:
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07) Subsystem: Lenovo Device 20e0 Flags: bus master, fast devsel, latency 0 Capabilities: [e0] Vendor Specific Information <?>
00:01.0 PCI bridge: Intel Corporation Mobile 4 Series Chipset PCI Express Graphics Port (rev 07) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=01, subordinate=01, sec-latency=0 I/O behind bridge: 00002000-00002fff Memory behind bridge: cff00000-cfffffff Prefetchable memory behind bridge: 00000000d0000000-00000000dfffffff Capabilities: [88] Subsystem: Lenovo Device 20e2 Capabilities: [80] Power Management version 3 Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [a0] Express Root Port (Slot+), MSI 00 Capabilities: [100] Virtual Channel <?> Capabilities: [140] Root Complex Link <?> Kernel driver in use: pcieport
00:03.0 Communication controller: Intel Corporation Mobile 4 Series Chipset MEI Controller (rev 07) Subsystem: Lenovo Device 20e6 Flags: bus master, fast devsel, latency 0, IRQ 11 Memory at fc226800 (64-bit, non-prefetchable) [size=16] Capabilities: [50] Power Management version 3 Capabilities: [8c] MSI: Enable- Count=1/1 Maskable- 64bit+
00:19.0 Ethernet controller: Intel Corporation 82567LM Gigabit Network Connection (rev 03) Subsystem: Lenovo Device 20ee Flags: bus master, fast devsel, latency 0, IRQ 29 Memory at fc200000 (32-bit, non-prefetchable) [size=128K] Memory at fc225000 (32-bit, non-prefetchable) [size=4K] I/O ports at 1840 [size=32] Capabilities: [c8] Power Management version 2 Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [e0] PCI Advanced Features Kernel driver in use: e1000e
00:1a.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03) (prog-if 00 [UHCI]) Subsystem: Lenovo Device 20f0 Flags: bus master, medium devsel, latency 0, IRQ 20 I/O ports at 1860 [size=32] Capabilities: [50] PCI Advanced Features Kernel driver in use: uhci_hcd
00:1a.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 03) (prog-if 00 [UHCI]) Subsystem: Lenovo Device 20f0 Flags: bus master, medium devsel, latency 0, IRQ 21 I/O ports at 1880 [size=32] Capabilities: [50] PCI Advanced Features Kernel driver in use: uhci_hcd
00:1a.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 03) (prog-if 00 [UHCI]) Subsystem: Lenovo Device 20f0 Flags: bus master, medium devsel, latency 0, IRQ 22 I/O ports at 18a0 [size=32] Capabilities: [50] PCI Advanced Features Kernel driver in use: uhci_hcd
00:1a.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03) (prog-if 20 [EHCI]) Subsystem: Lenovo Device 20f1 Flags: bus master, medium devsel, latency 0, IRQ 23 Memory at fc226c00 (32-bit, non-prefetchable) [size=1K] Capabilities: [50] Power Management version 2 Capabilities: [58] Debug port: BAR=1 offset=00a0 Capabilities: [98] PCI Advanced Features Kernel driver in use: ehci_hcd
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03) Subsystem: Lenovo Device 20f2 Flags: bus master, fast devsel, latency 0, IRQ 32 Memory at fc220000 (64-bit, non-prefetchable) [size=16K] Capabilities: [50] Power Management version 2 Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00 Capabilities: [100] Virtual Channel <?> Capabilities: [130] Root Complex Link <?> Kernel driver in use: HDA Intel
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 03) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=02, subordinate=02, sec-latency=0 I/O behind bridge: 00009000-00009fff Memory behind bridge: c0000000-c01fffff Prefetchable memory behind bridge: 00000000c0200000-00000000c03fffff Capabilities: [40] Express Root Port (Slot+), MSI 00 Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [90] Subsystem: Lenovo Device 20f3 Capabilities: [a0] Power Management version 2 Capabilities: [100] Virtual Channel <?> Capabilities: [180] Root Complex Link <?> Kernel driver in use: pcieport
00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 (rev 03) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=03, subordinate=03, sec-latency=0 I/O behind bridge: 0000a000-0000afff Memory behind bridge: f4200000-f42fffff Prefetchable memory behind bridge: 00000000c0400000-00000000c05fffff Capabilities: [40] Express Root Port (Slot+), MSI 00 Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [90] Subsystem: Lenovo Device 20f3 Capabilities: [a0] Power Management version 2 Capabilities: [100] Virtual Channel <?> Capabilities: [180] Root Complex Link <?> Kernel driver in use: pcieport
00:1c.3 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 4 (rev 03) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=05, subordinate=0c, sec-latency=0 I/O behind bridge: 00003000-00003fff Memory behind bridge: f8000000-f9ffffff Prefetchable memory behind bridge: 00000000f4000000-00000000f40fffff Capabilities: [40] Express Root Port (Slot+), MSI 00 Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [90] Subsystem: Lenovo Device 20f3 Capabilities: [a0] Power Management version 2 Capabilities: [100] Virtual Channel <?> Capabilities: [180] Root Complex Link <?> Kernel driver in use: pcieport
00:1c.4 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 5 (rev 03) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=0d, subordinate=14, sec-latency=0 I/O behind bridge: 00004000-00004fff Memory behind bridge: fa000000-fbffffff Prefetchable memory behind bridge: 00000000f4100000-00000000f41fffff Capabilities: [40] Express Root Port (Slot+), MSI 00 Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [90] Subsystem: Lenovo Device 20f3 Capabilities: [a0] Power Management version 2 Capabilities: [100] Virtual Channel <?> Capabilities: [180] Root Complex Link <?> Kernel driver in use: pcieport
00:1d.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03) (prog-if 00 [UHCI]) Subsystem: Lenovo Device 20f0 Flags: bus master, medium devsel, latency 0, IRQ 16 I/O ports at 18c0 [size=32] Capabilities: [50] PCI Advanced Features Kernel driver in use: uhci_hcd
00:1d.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03) (prog-if 00 [UHCI]) Subsystem: Lenovo Device 20f0 Flags: bus master, medium devsel, latency 0, IRQ 17 I/O ports at 18e0 [size=32] Capabilities: [50] PCI Advanced Features Kernel driver in use: uhci_hcd
00:1d.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03) (prog-if 00 [UHCI]) Subsystem: Lenovo Device 20f0 Flags: bus master, medium devsel, latency 0, IRQ 18 I/O ports at 1c00 [size=32] Capabilities: [50] PCI Advanced Features Kernel driver in use: uhci_hcd
00:1d.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03) (prog-if 20 [EHCI]) Subsystem: Lenovo Device 20f1 Flags: bus master, medium devsel, latency 0, IRQ 19 Memory at fc227000 (32-bit, non-prefetchable) [size=1K] Capabilities: [50] Power Management version 2 Capabilities: [58] Debug port: BAR=1 offset=00a0 Capabilities: [98] PCI Advanced Features Kernel driver in use: ehci_hcd
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93) (prog- if 01 [Subtractive decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=15, subordinate=18, sec-latency=32 I/O behind bridge: 00005000-00008fff Memory behind bridge: f4300000-f7ffffff Prefetchable memory behind bridge: 00000000f0000000-00000000f3ffffff Capabilities: [50] Subsystem: Lenovo Device 20f4
00:1f.0 ISA bridge: Intel Corporation ICH9M-E LPC Interface Controller (rev 03) Subsystem: Lenovo Device 20f5 Flags: bus master, medium devsel, latency 0 Capabilities: [e0] Vendor Specific Information <?>
00:1f.2 SATA controller: Intel Corporation ICH9M/M-E SATA AHCI Controller (rev 03) (prog-if 01 [AHCI 1.0]) Subsystem: Lenovo Device 20f8 Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 30 I/O ports at 1c40 [size=8] I/O ports at 1834 [size=4] I/O ports at 1838 [size=8] I/O ports at 1830 [size=4] I/O ports at 1c20 [size=32] Memory at fc226000 (32-bit, non-prefetchable) [size=2K] Capabilities: [80] MSI: Enable+ Count=1/16 Maskable- 64bit- Capabilities: [70] Power Management version 3 Capabilities: [a8] SATA HBA <?> Capabilities: [b0] PCI Advanced Features Kernel driver in use: ahci
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 03) Subsystem: Lenovo Device 20f9 Flags: medium devsel, IRQ 23 Memory at fc227400 (64-bit, non-prefetchable) [size=256] I/O ports at 1c60 [size=32] Kernel driver in use: i801_smbus
01:00.0 VGA compatible controller: ATI Technologies Inc Mobility Radeon HD 3650 (prog-if 00 [VGA controller]) Subsystem: Lenovo Device 2127 Flags: bus master, fast devsel, latency 0, IRQ 16 Memory at d0000000 (32-bit, prefetchable) [size=256M] I/O ports at 2000 [size=256] Memory at cfff0000 (32-bit, non-prefetchable) [size=64K] [virtual] Expansion ROM at cff00000 [disabled] [size=128K] Capabilities: [50] Power Management version 3 Capabilities: [58] Express Legacy Endpoint, MSI 00 Capabilities: [a0] MSI: Enable- Count=1/1 Maskable- 64bit+ Capabilities: [100] Vendor Specific Information <?>
03:00.0 Network controller: Intel Corporation PRO/Wireless 5100 AGN [Shiloh] Network Connection Subsystem: Intel Corporation Device 1211 Flags: bus master, fast devsel, latency 0, IRQ 31 Memory at f4200000 (64-bit, non-prefetchable) [size=8K] Capabilities: [c8] Power Management version 3 Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [e0] Express Endpoint, MSI 00 Capabilities: [100] Advanced Error Reporting Capabilities: [140] Device Serial Number 00-22-fa-ff-ff-c8-53-ce Kernel driver in use: iwlagn
15:00.0 CardBus bridge: Ricoh Co Ltd RL5c476 II (rev ba) Subsystem: Lenovo Device 20c6 Flags: bus master, medium devsel, latency 168, IRQ 16 Memory at f4300000 (32-bit, non-prefetchable) [size=4K] Bus: primary=15, secondary=16, subordinate=17, sec-latency=176 Memory window 0: f0000000-f3fff000 (prefetchable) Memory window 1: c4000000-c7fff000 I/O window 0: 00005000-000050ff I/O window 1: 00005100-000051ff 16-bit legacy interface ports at 0001
15:00.1 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller (rev 04) (prog-if 10 [OHCI]) Subsystem: Lenovo Device 20c7 Flags: bus master, medium devsel, latency 32, IRQ 17 Memory at f4301000 (32-bit, non-prefetchable) [size=2K] Capabilities: [dc] Power Management version 2 Kernel driver in use: firewire_ohci
15:00.2 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 21) Subsystem: Lenovo Device 20c8 Flags: bus master, medium devsel, latency 32, IRQ 18 Memory at f4301800 (32-bit, non-prefetchable) [size=256] Capabilities: [80] Power Management version 2 Kernel driver in use: sdhci-pci
15:00.3 System peripheral: Ricoh Co Ltd R5C843 MMC Host Controller (rev ff) (prog-if ff) !!! Unknown header type 7f Kernel driver in use: ricoh-mmc
15:00.4 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 11) Subsystem: Lenovo ThinkPad T61 Flags: bus master, medium devsel, latency 32, IRQ 11 Memory at f4302000 (32-bit, non-prefetchable) [size=256] Capabilities: [80] Power Management version 2
15:00.5 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 11) Subsystem: Lenovo Device 20cb Flags: bus master, medium devsel, latency 32, IRQ 11 Memory at f4302400 (32-bit, non-prefetchable) [size=256] Capabilities: [80] Power Management version 2
| |