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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-bugs] [Bug 645] New: many "Timer ISR/0: Time went backwards" messages and slow system
http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=645 Summary: many "Timer ISR/0: Time went backwards" messages and slow system Product: Xen Version: 3.0.2 Platform: x86 OS/Version: Linux-2.6 Status: NEW Severity: normal Priority: P2 Component: Hypervisor AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx ReportedBy: mad@xxxxxxxxxxxx After upgrading from 2.0.7 to 3.0.2 on 2 systems i got more or less of this messages. System 1 is a P3 SMP w 1.5Gig Ram running gentoo linux # cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 8 model name : Pentium III (Coppermine) stepping : 10 cpu MHz : 1002.270 cache size : 256 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 3 wp : yes flags : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36 mmx fxsr sse bogomips : 2104.66 System 2 is a P4 Xeon SMP w 4.0Gig Ram running the same gentoo # cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 2 model name : Intel(R) Xeon(TM) CPU 2.00GHz stepping : 9 cpu MHz : 1994.114 cache size : 512 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid xtpr bogomips : 15455.08 On System 1 i got about 20-30 messages while booting, on System 2 i got 100+, also while running the System. They are also more painful because this is the important maschine. Here is a dmesg sample: printk: 90 messages suppressed. Timer ISR/0: Time went backwards: delta=-51757760 delta_cpu=33242240 shadow=8004605103315 off=601395929 processed=8005258245453 cpu_processed=8005173245453 0: 8005173245453 1: 8004539974293 2: 8005257974293 3: 8004132974293 printk: 114 messages suppressed. Timer ISR/0: Time went backwards: delta=-126960768 delta_cpu=32039232 shadow=8009037515296 off=786775017 processed=8009951245453 cpu_processed=8009792245453 0: 8009792245453 1: 8009777974293 2: 8009950974293 3: 8009131974293 After reading some stuff i upgraded to 3.0.2-2, same result on System 1, no upgrade till now on System 2. Both are installed via gentoo ebuilds, running 2.6.16-xen, are totally different except SMP feature. I have running it on a single CPU AMD like a charm. On both systems the platform timer reports as: "(XEN) Platform timer is 1.193MHz PIT" System 1 hw clock: # hwclock; date; sleep 20; date; hwclock Tue May 16 17:57:44 2006 -0.028350 seconds Tue May 16 17:57:43 MEST 2006 Tue May 16 17:58:03 MEST 2006 Tue May 16 17:58:05 2006 -0.973405 seconds System 2 hw clock: # hwclock; date; sleep 20; date; hwclock Tue May 16 16:46:11 2006 -0.881596 seconds Tue May 16 18:47:12 MEST 2006 Tue May 16 18:47:33 MEST 2006 Tue May 16 16:46:45 2006 -0.149249 seconds System 1 xm dmesg: # xm dmesg __ __ _____ ___ ____ ____ \ \/ /___ _ __ |___ / / _ \ |___ \ |___ \ \ // _ \ '_ \ |_ \| | | | __) |__ __) | / \ __/ | | | ___) | |_| | / __/|__/ __/ /_/\_\___|_| |_| |____(_)___(_)_____| |_____| http://www.cl.cam.ac.uk/netos/xen University of Cambridge Computer Laboratory Xen version 3.0.2-2 (root@xxxxxxxxxxxx) (gcc version 3.4.4 (Gentoo 3.4.4-r1, ss p-3.4.4-1.0, pie-8.7.8)) Tue May 16 15:57:03 MEST 2006 Latest ChangeSet: Thu Apr 13 15:18:37 2006 +0100 9617:5802713c159b (XEN) Console output is synchronous. (XEN) Physical RAM map: (XEN) 0000000000000000 - 00000000000a0000 (usable) (XEN) 00000000000f0000 - 0000000000100000 (reserved) (XEN) 0000000000100000 - 000000005fff0000 (usable) (XEN) 000000005fff0000 - 000000005fff3000 (ACPI NVS) (XEN) 000000005fff3000 - 0000000060000000 (ACPI data) (XEN) 00000000fec00000 - 0000000100000000 (reserved) (XEN) System RAM: 1535MB (1572416kB) (XEN) Xen heap: 10MB (10584kB) (XEN) Using scheduler: Simple EDF Scheduler (sedf) (XEN) PAE disabled. (XEN) found SMP MP-table at 000f5e70 (XEN) DMI 2.2 present. (XEN) Using APIC driver default (XEN) ACPI: RSDP (v000 VIA694 ) @ 0x000f7760 (XEN) ACPI: RSDT (v001 VIA694 AWRDACPI 0x42302e31 AWRD 0x00000000) @ 0x5fff3000 (XEN) ACPI: FADT (v001 VIA694 AWRDACPI 0x42302e31 AWRD 0x00000000) @ 0x5fff3040 (XEN) ACPI: MADT (v001 VIA694 0x00000000 0x00000000) @ 0x5fff5900 (XEN) ACPI: DSDT (v001 VIA694 AWRDACPI 0x00001000 MSFT 0x0100000c) @ 0x00000000 (XEN) ACPI: Local APIC address 0xfee00000 (XEN) ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled) (XEN) Processor #0 6:8 APIC version 17 (XEN) ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled) (XEN) Processor #1 6:8 APIC version 17 (XEN) ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0]) (XEN) IOAPIC[0]: apic_id 2, version 17, address 0xfec00000, GSI 0-23 (XEN) ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl) (XEN) ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 dfl dfl) (XEN) ACPI: IRQ0 used by override. (XEN) ACPI: IRQ2 used by override. (XEN) ACPI: IRQ9 used by override. (XEN) Enabling APIC mode: Flat. Using 1 I/O APICs (XEN) Using ACPI (MADT) for SMP configuration information (XEN) Initializing CPU#0 (XEN) Detected 1002.286 MHz processor. (XEN) CPU: L1 I cache: 16K, L1 D cache: 16K (XEN) CPU: L2 cache: 256K (XEN) Intel machine check architecture supported. (XEN) Intel machine check reporting enabled on CPU#0. (XEN) CPU0: Intel Pentium III (Coppermine) stepping 0a (XEN) Booting processor 1/1 eip 90000 (XEN) Initializing CPU#1 (XEN) CPU: L1 I cache: 16K, L1 D cache: 16K (XEN) CPU: L2 cache: 256K (XEN) Intel machine check architecture supported. (XEN) Intel machine check reporting enabled on CPU#1. (XEN) CPU1: Intel Pentium III (Coppermine) stepping 0a (XEN) Total of 2 processors activated. (XEN) ENABLING IO-APIC IRQs (XEN) ..TIMER: vector=0x31 apic1=0 pin1=2 apic2=-1 pin2=-1 (XEN) checking TSC synchronization across 2 CPUs: passed. (XEN) Platform timer is 1.193MHz PIT (XEN) Brought up 2 CPUs (XEN) Machine check exception polling timer started. (XEN) mtrr: your CPUs had inconsistent fixed MTRR settings (XEN) mtrr: your CPUs had inconsistent variable MTRR settings (XEN) mtrr: probably your BIOS does not setup all CPUs. (XEN) mtrr: corrected configuration. (XEN) Using IPI Shortcut mode (XEN) *** LOADING DOMAIN 0 *** (XEN) Domain 0 kernel supports features = { 0000001f }. (XEN) Domain 0 kernel requires features = { 00000000 }. (XEN) PHYSICAL MEMORY ARRANGEMENT: (XEN) Dom0 alloc.: 5f000000->5f800000 (129024 pages to be allocated) (XEN) VIRTUAL MEMORY ARRANGEMENT: (XEN) Loaded kernel: c0100000->c0506cf8 (XEN) Init. ramdisk: c0507000->c0507000 (XEN) Phys-Mach map: c0507000->c0587000 (XEN) Start info: c0587000->c0588000 (XEN) Page tables: c0588000->c058b000 (XEN) Boot stack: c058b000->c058c000 (XEN) TOTAL: c0000000->c0800000 (XEN) ENTRY ADDRESS: c0100000 (XEN) Dom0 has maximum 2 VCPUs (XEN) Scrubbing Free RAM: ................done. (XEN) Xen trace buffers: disabled (XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to Xen ). System 1 dmesg: Linux version 2.6.16-xen (root@defiant) (gcc version 3.4.4 (Gentoo 3.4.4-r1, ssp-3.4.4-1.0, pie-8.7.8)) #11 SMP Tue M ay 16 17:59:03 MEST 2006 BIOS-provided physical RAM map: Xen: 0000000000000000 - 0000000020000000 (usable) 0MB HIGHMEM available. 520MB LOWMEM available. On node 0 totalpages: 133120 DMA zone: 133120 pages, LIFO batch:31 DMA32 zone: 0 pages, LIFO batch:0 Normal zone: 0 pages, LIFO batch:0 HighMem zone: 0 pages, LIFO batch:0 found SMP MP-table at 000f5e70 DMI 2.2 present. ACPI: RSDP (v000 VIA694 ) @ 0x000f7760 ACPI: RSDT (v001 VIA694 AWRDACPI 0x42302e31 AWRD 0x00000000) @ 0x5fff3000 ACPI: FADT (v001 VIA694 AWRDACPI 0x42302e31 AWRD 0x00000000) @ 0x5fff3040 ACPI: MADT (v001 VIA694 0x00000000 0x00000000) @ 0x5fff5900 ACPI: DSDT (v001 VIA694 AWRDACPI 0x00001000 MSFT 0x0100000c) @ 0x00000000 ACPI: Local APIC address 0xfee00000 ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled) ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled) ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0]) IOAPIC[0]: apic_id 2, version 17, address 0xfec00000, GSI 0-23 ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl) ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 dfl dfl) ACPI: IRQ0 used by override. ACPI: IRQ2 used by override. ACPI: IRQ9 used by override. Enabling APIC mode: Flat. Using 1 I/O APICs Using ACPI (MADT) for SMP configuration information IRQ lockup detection disabled Allocating PCI resources starting at 60000000 (gap: 60000000:9ec00000) Built 1 zonelists Kernel command line: root=/dev/md0 max_loop=64 panic=20 5 Enabling fast FPU save and restore... done. Enabling unmasked SIMD FPU exception support... done. Initializing CPU#0 PID hash table entries: 4096 (order: 12, 65536 bytes) Xen reported: 1002.270 MHz processor. Console: colour VGA+ 80x25 Dentry cache hash table entries: 131072 (order: 7, 524288 bytes) Inode-cache hash table entries: 65536 (order: 6, 262144 bytes) Software IO TLB enabled: Aperture: 2 megabytes Bus range: 0x000000001e000000 - 0x000000001e200000 Kernel range: 0x00000000c0613000 - 0x00000000c0813000 vmalloc area: e1000000-fb7fe000, maxmem 33ffe000 Memory: 511488k/532480k available (2933k kernel code, 12464k reserved, 752k data, 192k init, 0k highmem) Checking if this processor honours the WP bit even in supervisor mode... Ok. Calibrating delay using timer specific routine.. 2104.66 BogoMIPS (lpj=1052332) Mount-cache hash table entries: 512 CPU: After generic identify, caps: 0387d3f1 00000000 00000000 00000000 00000000 00000000 00000000 CPU: After vendor identify, caps: 0387d3f1 00000000 00000000 00000000 00000000 00000000 00000000 CPU: L1 I cache: 16K, L1 D cache: 16K CPU: L2 cache: 256K CPU serial number disabled. CPU: After all inits, caps: 0383d3f1 00000000 00000000 00000040 00000000 00000000 00000000 Checking 'hlt' instruction... OK. ENABLING IO-APIC IRQs Brought up 2 CPUs Initializing CPU#1 migration_cost=580 Grant table initialized NET: Registered protocol family 16 ACPI: bus type pci registered PCI: Using configuration type 1 ACPI: Subsystem revision 20060127 Timer ISR/0: Time went backwards: delta=-46021931 delta_cpu=978069 shadow=5207074370 off=905208816 processed=61583039 59 cpu_processed=6111303959 0: 6111303959 1: 6158074370 ACPI: Interpreter enabled ACPI: Using IOAPIC for interrupt routing ACPI: PCI Root Bridge [PCI0] (0000:00) PCI: Probing PCI hardware (bus 00) ACPI: Assume root bridge [\_SB_.PCI0] bus is 0 PCI quirk: region 4000-40ff claimed by vt82c586 ACPI PCI quirk: region 6000-607f claimed by vt82c686 HW-mon PCI quirk: region 5000-500f claimed by vt82c686 SMB Boot video device is 0000:01:00.0 ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT] ACPI: PCI Interrupt Link [LNKA] (IRQs 1 3 4 5 6 7 *10 11 12 14 15) ACPI: PCI Interrupt Link [LNKB] (IRQs 1 3 4 5 6 7 10 *11 12 14 15) ACPI: PCI Interrupt Link [LNKC] (IRQs 1 3 4 5 6 7 10 11 12 14 *15) ACPI: PCI Interrupt Link [LNKD] (IRQs 1 3 4 5 6 7 10 11 *12 14 15) xen_mem: Initialising balloon driver. SCSI subsystem initialized usbcore: registered new driver usbfs usbcore: registered new driver hub PCI: Using ACPI for IRQ routing PCI: If a device doesn't work, try "pci=routeirq". If it helps, post a report PCI: Bridge: 0000:00:01.0 IO window: disabled. MEM window: d0000000-d2ffffff PREFETCH window: d3000000-d3ffffff PCI: Setting latency timer of device 0000:00:01.0 to 64 Timer ISR/1: Time went backwards: delta=-14037730 delta_cpu=220191859 shadow=7157981472 off=214286754 processed=73863 03959 cpu_processed=7152074370 0: 7385303959 1: 7152074370 and so on ... about 20-30 messages .... System 1, System 2 has lot more. Any help is appreciated regards Martin -- Configure bugmail: http://bugzilla.xensource.com/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. _______________________________________________ Xen-bugs mailing list Xen-bugs@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-bugs
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