Host: Parallels Desktop for Mac Build 8.0.18615 (Revision 948847; Wed, 27 Nov 2013)
Guest: Ubuntu 13.10 amd64, kernel 3.11.0-15-generic, ntpdate package is removed
Actual dmesg output (with a 1.7 second boot delay):
[ 0.000000] kvm-clock: cpu 0, msr 0:ffe7001, boot clock
[ 1.712557] [ffffea0000000000-ffffea00003fffff] PMD -> [ffff88000ec00000-ffff88000effffff] on node 0
Expected dmesg output (without 1.7 second boot delay):
[ 0.000000] kvm-clock: cpu 0, msr 0:ffe7001, boot clock
[ 0.000000] [ffffea0000000000-ffffea00003fffff] PMD -> [ffff88000ec00000-ffff88000effffff] on node 0
Regression:
1. Time = Sync from Mac OS X
2. Time = Do not sync
Result: no difference
Other VM's seem to have a lot shorter kvm-clock boot process, f.e. Suse:
Code:
[ 0.000000] kvm-clock: cpu 0, msr 0:7d3a81, boot clock
[ 0.000000] kvm-clock: cpu 0, msr 0:1206a81, primary cpu clock
[ 0.012000] kvm-clock: cpu 1, msr 0:1306a81, secondary cpu clock
[ 0.160082] Switching to clocksource kvm-clock
source: http://doc.opensuse.org/products/dr...ibvirt.config.html#sec.kvm.managing.clock.kvm
Other example, Debian:
Code:
[ 0.000000] kvm-clock: Using msrs 4b564d01 and 4b564d00
[ 0.000000] kvm-clock: cpu 0, msr 0:3fff2001, boot clock
[ 0.000000] kvm-clock: cpu 0, msr 0:3fff2001, primary cpu clock
[ 0.000000] kvm-stealtime: cpu 0, msr 3fc0e040
[ 0.260023] Switched to clocksource kvm-clock
source: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=731317
Why is there a 1.7 second delay in Ubuntu's kernel 3.11.0-15 boot process within this Parallels KVM environment?
Any ideas how to speed up the boot process of this guest OS?
First part of dmesg output:
Code:
[ 0.000000] Initializing cgroup subsys cpuset
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Initializing cgroup subsys cpuacct
[ 0.000000] Linux version 3.11.0-15-generic (buildd@roseapple) (gcc version 4.8.1 (Ubuntu/Linaro 4.8.1-10ubuntu8) ) #25-Ubuntu SMP Thu Jan 30 17:22:01 UTC 2014 (Ubuntu 3.11.0-15.25-generic 3.11.10)
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.11.0-15-generic root=UUID=868ae17e-b0c5-4697-9fda-03acb0d163a3 ro text
[ 0.000000] KERNEL supported cpus:
[ 0.000000] Intel GenuineIntel
[ 0.000000] AMD AuthenticAMD
[ 0.000000] Centaur CentaurHauls
[ 0.000000] Disabled fast string operations
[ 0.000000] e820: BIOS-provided physical RAM map:
[ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable
[ 0.000000] BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000000dc000-0x00000000000fffff] reserved
[ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x000000000ffeffff] usable
[ 0.000000] BIOS-e820: [mem 0x000000000fff0000-0x000000000fffefff] ACPI data
[ 0.000000] BIOS-e820: [mem 0x000000000ffff000-0x000000000fffffff] ACPI NVS
[ 0.000000] BIOS-e820: [mem 0x00000000fd000000-0x00000000fd7fffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fec00000-0x00000000fec00fff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fee00000-0x00000000fee00fff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000ffc00000-0x00000000ffffffff] reserved
[ 0.000000] NX (Execute Disable) protection: active
[ 0.000000] SMBIOS 2.3 present.
[ 0.000000] DMI: Parallels Software International Inc. Parallels Virtual Platform/Parallels Virtual Platform, BIOS 8.0.18615.948847 10/26/2007
[ 0.000000] Hypervisor detected: KVM
[ 0.000000] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
[ 0.000000] e820: remove [mem 0x000a0000-0x000fffff] usable
[ 0.000000] No AGP bridge found
[ 0.000000] e820: last_pfn = 0xfff0 max_arch_pfn = 0x400000000
[ 0.000000] MTRR default type: uncachable
[ 0.000000] MTRR fixed ranges enabled:
[ 0.000000] 00000-9FFFF write-back
[ 0.000000] A0000-BFFFF uncachable
[ 0.000000] C0000-C7FFF write-protect
[ 0.000000] C8000-EFFFF uncachable
[ 0.000000] F0000-FFFFF write-protect
[ 0.000000] MTRR variable ranges enabled:
[ 0.000000] 0 base 000000000 mask FF0000000 write-back
[ 0.000000] 1 disabled
[ 0.000000] 2 disabled
[ 0.000000] 3 disabled
[ 0.000000] 4 disabled
[ 0.000000] 5 disabled
[ 0.000000] 6 disabled
[ 0.000000] 7 disabled
[ 0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
[ 0.000000] found SMP MP-table at [mem 0x000ff100-0x000ff10f] mapped at [ffff8800000ff100]
[ 0.000000] Scanning 1 areas for low memory corruption
[ 0.000000] Base memory trampoline at [ffff880000099000] 99000 size 24576
[ 0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff]
[ 0.000000] [mem 0x00000000-0x000fffff] page 4k
[ 0.000000] BRK [0x01fd1000, 0x01fd1fff] PGTABLE
[ 0.000000] BRK [0x01fd2000, 0x01fd2fff] PGTABLE
[ 0.000000] BRK [0x01fd3000, 0x01fd3fff] PGTABLE
[ 0.000000] init_memory_mapping: [mem 0x0fc00000-0x0fdfffff]
[ 0.000000] [mem 0x0fc00000-0x0fdfffff] page 2M
[ 0.000000] init_memory_mapping: [mem 0x0c000000-0x0fbfffff]
[ 0.000000] [mem 0x0c000000-0x0fbfffff] page 2M
[ 0.000000] init_memory_mapping: [mem 0x00100000-0x0bffffff]
[ 0.000000] [mem 0x00100000-0x001fffff] page 4k
[ 0.000000] [mem 0x00200000-0x0bffffff] page 2M
[ 0.000000] init_memory_mapping: [mem 0x0fe00000-0x0ffeffff]
[ 0.000000] [mem 0x0fe00000-0x0ffeffff] page 4k
[ 0.000000] BRK [0x01fd4000, 0x01fd4fff] PGTABLE
[ 0.000000] RAMDISK: [mem 0x0f1e9000-0x0f385fff]
[ 0.000000] ACPI: RSDP 00000000000e8000 00024 (v02 PRLS )
[ 0.000000] ACPI: XSDT 000000000fff0040 00034 (v01 PRLS PRLS_OEM 00000001 INTL 20051216)
[ 0.000000] ACPI: FACP 000000000fff0100 000F4 (v03 PRLS PRLS_OEM 00000001 INTL 20051216)
[ 0.000000] ACPI: DSDT 000000000fff0480 04377 (v02 PRLS PRLSACPI 00001001 INTL 20051216)
[ 0.000000] ACPI: FACS 000000000fff0200 00040
[ 0.000000] ACPI: APIC 000000000fff0240 00216 (v01 PRLS PRLS_OEM 00000001 INTL 20051216)
[ 0.000000] ACPI: Local APIC address 0xfee00000
[ 0.000000] No NUMA configuration found
[ 0.000000] Faking a node at [mem 0x0000000000000000-0x000000000ffeffff]
[ 0.000000] Initmem setup node 0 [mem 0x00000000-0x0ffeffff]
[ 0.000000] NODE_DATA [mem 0x0ffeb000-0x0ffeffff]
[ 0.000000] kvm-clock: Using msrs 4b564d01 and 4b564d00
[ 0.000000] kvm-clock: cpu 0, msr 0:ffe7001, boot clock
[ 1.712557] [ffffea0000000000-ffffea00003fffff] PMD -> [ffff88000ec00000-ffff88000effffff] on node 0
[ 1.712566] Zone ranges:
[ 1.712570] DMA [mem 0x00001000-0x00ffffff]
[ 1.712571] DMA32 [mem 0x01000000-0xffffffff]
[ 1.712572] Normal empty
[ 1.712575] Movable zone start for each node
[ 1.712576] Early memory node ranges
[ 1.712577] node 0: [mem 0x00001000-0x0009efff]
[ 1.712578] node 0: [mem 0x00100000-0x0ffeffff]
[ 1.712580] On node 0 totalpages: 65422
[ 1.712583] DMA zone: 64 pages used for memmap
[ 1.712584] DMA zone: 21 pages reserved
[ 1.712586] DMA zone: 3998 pages, LIFO batch:0
[ 1.712687] DMA32 zone: 960 pages used for memmap
[ 1.712688] DMA32 zone: 61424 pages, LIFO batch:15
[ 1.713883] ACPI: PM-Timer IO Port: 0x4008
...
Afterwards there is another clock message in the dmesg output:
Code:
[ 1.733599] kvm-clock: cpu 0, msr 0:ffe7001, primary cpu clock
The switching to clocksource message is finally there after 1.95 seconds:
Code:
[ 1.953470] Switched to clocksource kvm-clock
At 2.35 second the system clock is set from rtc_cmos clock:
Code:
[ 2.350050] rtc_cmos 00:02: setting system clock to 2014-02-11 18:09:19 UTC (1392142159)
Full dmesg output: http://pastebin.com/8sQHL4zN
