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RE: [Xen-devel] VM start time slows with large number of VMs

To: "Carb, Brian A" <Brian.Carb@xxxxxxxxxx>, "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] VM start time slows with large number of VMs
From: Mats Petersson <mats@xxxxxxxxxxxxxxxxx>
Date: Thu, 06 Sep 2007 18:29:59 +0100
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At 17:24 06/09/2007, Carb, Brian A wrote:
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        boundary="----_=_NextPart_001_01C7F0A2.55DB0EB0"

keir

I'll try timing this as I load up...

but when I restart my test system, with only dom0 running, xenstore-ls is already slow before any VMs are started:

  time xenstore-ls >/dev/null
  real    0m21.725s
  user    0m0.010s
  sys     0m0.090s

If I save the output from the xenstore-ls, the file has 61,318 lines with information from all the VMs run yesterday. I conclude that xenstore does not get cleared on startup. Is there a way to clear it?


It is perfectly fine to remove the xenstore.tdb [filename from memory] in /var/xen/lib [again, from memory]. Unless of course you actually NEED some of your old Xenstrore entries for soemthing, but in general, they are fine to be removed completely.

--
Mats


brian carb
unisys corporation - malvern, pa



----------
From: Keir Fraser
Sent: Wednesday, September 05, 2007 1:11 PM
To: Carb, Brian A; xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] VM start time slows with large number of VMs

xenstore slowness seems a reasonable hypothesis. How does performance of 'time xenstore-ls >/dev/null' change as you increase the number of guests?

 -- Keir

On 4/9/07 17:51, "Carb, Brian A" wrote:

Hello,

We're running Xen Unstable changeset 15468 with SLES10 on a Unisys ES7000/one 56x cpu and 160GB memory. Xen is built with NR_DYNIRQS=1024 and max_phys_cpus=64, and booted with dom0_mem=1024 and xenheap_megabytes=64. We have 320 para-virtualized SLES10 VMs on external storage.

Our script starts a VM, waits for the start to complete, then starts the next: "for i in *.cfg; do xm create $i; done". As more VMs start, the time to start each one increases. I've attached a config file for one of the VMs, as well as a portion of the xend.log which shows timestamps of the events for 2 VMS, vm002 and vm263.

The total elapsed time of the start from "create" to "unpaused" for vm002 is 13 seconds, but by the time 262 VMs are started, the start of vm263 has slowed to 238 seconds. The host itself is not sluggish, as we can open putty sessions to and interact with dom0. However, if we run "xm top", its interface is very unresponsive. Could writing to the xenstore be taking longer and longer? Could there be possible contention for vmlinuz and initrd since they are being used by every VM to boot? Would it be better to use bootloader/bootentry and store the vmlinuz and initrd within each VM?

Any insight would be appreciated.

brian carb
unisys corporation, malvern pa

----- domU config file 002.cfg -----
kernel = "/boot/vmlinuz-xen"
ramdisk = "/boot/initrd-xen"
root = "/dev/sda2 ro"
disk = [ 'phy:/tmp/xendevs/xen002,sda,w' ]
memory = 512
vcpus = 4
name = 'xen002'
vif = [ 'mac=00:16:3e:0d:a0:01' ]
ip = '10.0.27.2'
netmask = '255.254.0.0'
extra = ' xencons=tty1 3'
----- xend.log -----
[2007-09-02 05:26:42 8597] DEBUG (XendDomainInfo:78) XendDomainInfo.create(['vm', ['name', 'xen002'], ['memory', 512], ['vcpus', 4], ['on_xend_start', 'ignore'], ['on_xend_stop', 'ignore'], ['image', ['linux', ['kernel', '/boot/vmlinuz-xen'], ['ramdisk', '/boot/initrd-xen'], ['ip', '10.0.27.2:1.2.3.4::255.254.0.0::eth0:off'], ['root', '/dev/sda2 ro'], ['args', ' xencons=tty1 3']]], ['device', ['vbd', ['uname', 'phy:/tmp/xendevs/xen002'], ['dev', 'sda'], ['mode', 'w']]], ['device', ['vif', ['mac', '00:16:3e:0d:a0:01']]]]) [2007-09-02 05:26:42 8597] DEBUG (XendDomainInfo:1418) XendDomainInfo.constructDomain [2007-09-02 05:26:42 8597] DEBUG (balloon:114) Balloon: 169819872 KiB free; need 2048; done.
[2007-09-02 05:26:43 8597] DEBUG (XendDomain:434) Adding Domain: 16
[2007-09-02 05:26:43 8597] DEBUG (XendDomainInfo:1472) XendDomainInfo.initDomain: 16 256 [2007-09-02 05:26:43 8597] DEBUG (XendDomainInfo:1503) _initDomain:shadow_memory=0x0, memory_static_max=0x20000000, memory_static_min=0x0. [2007-09-02 05:26:43 8597] DEBUG (balloon:114) Balloon: 169819864 KiB free; need 524288; done. [2007-09-02 05:26:43 8597] INFO (image:128) buildDomain os=linux dom=16 vcpus=4
[2007-09-02 05:26:43 8597] DEBUG (image:197) domid          = 16
[2007-09-02 05:26:43 8597] DEBUG (image:198) memsize        = 512
[2007-09-02 05:26:43 8597] DEBUG (image:199) image = /boot/vmlinuz-xen
[2007-09-02 05:26:43 8597] DEBUG (image:200) store_evtchn   = 1
[2007-09-02 05:26:43 8597] DEBUG (image:201) console_evtchn = 2
[2007-09-02 05:26:43 8597] DEBUG (image:202) cmdline = root=/dev/sda2 ro ip=10.0.27.2:1.2.3.4::255.254.0.0::eth0:off xencons=tty1 3
[2007-09-02 05:26:43 8597] DEBUG (image:203) ramdisk        = /boot/initrd-xen
[2007-09-02 05:26:43 8597] DEBUG (image:204) vcpus          = 4
[2007-09-02 05:26:43 8597] DEBUG (image:205) features       =
[2007-09-02 05:26:43 8597] INFO (XendDomainInfo:1321) createDevice: vbd : {'uuid': '8d79c4ed-4ddc-afee-9725-f5c2d388a02e', 'bootable': 1, 'driver': 'paravirtualised', 'dev': 'sda', 'uname': 'phy:/tmp/xendevs/xen002', 'mode': 'w'} [2007-09-02 05:26:43 8597] DEBUG (DevController:115) DevController: writing {'virtual-device': '2048', 'device-type': 'disk', 'protocol': 'x86_64-abi', 'backend-id': '0', 'state': '1', 'backend': '/local/domain/0/backend/vbd/16/2048'} to /local/domain/16/device/vbd/2048. [2007-09-02 05:26:43 8597] DEBUG (DevController:117) DevController: writing {'domain': 'xen002', 'frontend': '/local/domain/16/device/vbd/2048', 'uuid': '8d79c4ed-4ddc-afee-9725-f5c2d388a02e', 'dev': 'sda', 'state': '1', 'params': '/tmp/xendevs/xen002', 'mode': 'w', 'online': '1', 'frontend-id': '16', 'type': 'phy'} to /local/domain/0/backend/vbd/16/2048. [2007-09-02 05:26:44 8597] INFO (XendDomainInfo:1321) createDevice: vif : {'mac': '00:16:3e:0d:a0:01', 'uuid': 'bb43e84a-a9a1-7488-1ba4-3b713eff82aa'} [2007-09-02 05:26:45 8597] DEBUG (DevController:115) DevController: writing {'mac': '00:16:3e:0d:a0:01', 'handle': '0', 'protocol': 'x86_64-abi', 'backend-id': '0', 'state': '1', 'backend': '/local/domain/0/backend/vif/16/0'} to /local/domain/16/device/vif/0. [2007-09-02 05:26:45 8597] DEBUG (DevController:117) DevController: writing {'domain': 'xen002', 'handle': '0', 'uuid': 'bb43e84a-a9a1-7488-1ba4-3b713eff82aa', 'script': '/etc/xen/scripts/vif-bridge', 'state': '1', 'frontend': '/local/domain/16/device/vif/0', 'mac': '00:16:3e:0d:a0:01', 'online': '1', 'frontend-id': '16', 'type': 'netfront'} to /local/domain/0/backend/vif/16/0. [2007-09-02 05:26:46 8597] DEBUG (XendDomainInfo:1978) Storing VM details: {'on_xend_stop': 'ignore', 'shadow_memory': '0', 'uuid': 'f146fdfc-e624-f7cb-4baf-0471f01f6014', 'on_reboot': 'restart', 'start_time': '1188725206.15', 'on_poweroff': 'destroy', 'on_xend_start': 'ignore', 'on_crash': 'restart', 'xend/restart_count': '0', 'vcpus': '4', 'vcpu_avail': '15', 'image': "(linux (kernel /boot/vmlinuz-xen) (ramdisk /boot/initrd-xen) (args 'root=/dev/sda2 ro ip=10.0.27.2:1.2.3.4::255.254.0.0::eth0:off xencons=tty1 3') (notes (FEATURES 'writable_page_tables|writable_descriptor_tables|auto_translated_physmap|pae_pgdir_above_4gb|supervisor_mode_kernel') (VIRT_BASE -2147483648) (GUEST_VERSION 2.6) (PADDR_OFFSET -2147483648) (GUEST_OS linux) (HYPERCALL_PAGE -2145361920) (LOADER generic) (SUSPEND_CANCEL 1) (ENTRY -2145386496) (XEN_VERSION xen-3.0)))", 'name': 'xen002'} [2007-09-02 05:26:46 8597] DEBUG (XendDomainInfo:823) Storing domain details: {'console/ring-ref': '34194913', 'image/entry': '-2145386496', 'console/port': '2', 'cpu/3/availability': 'online', 'store/ring-ref': '34194914', 'image/loader': 'generic', 'vm': '/vm/f146fdfc-e624-f7cb-4baf-0471f01f6014', 'control/platform-feature-multiprocessor-suspend': '1', 'cpu/2/availability': 'online', 'cpu/1/availability': 'online', 'image/features/writable-descriptor-tables': '1', 'image/virt-base': '-2147483648', 'memory/target': '524288', 'image/guest-version': '2.6', 'image/features/supervisor-mode-kernel': '1', 'image/guest-os': 'linux', 'console/limit': '1048576', 'image/paddr-offset': '-2147483648', 'image/hypercall-page': '-2145361920', 'image/suspend-cancel': '1', 'cpu/0/availability': 'online', 'image/features/pae-pgdir-above-4gb': '1', 'image/features/writable-page-tables': '1', 'image/features/auto-translated-physmap': '1', 'name': 'xen002', 'domid': '16', 'image/xen-version': 'xen-3.0', 'store/port': '1'} [2007-09-02 05:26:50 8597] DEBUG (DevController:115) DevController: writing {'protocol': 'x86_64-abi', 'state': '1', 'backend-id': '0', 'backend': '/local/domain/0/backend/console/16/0'} to /local/domain/16/device/console/0. [2007-09-02 05:26:50 8597] DEBUG (DevController:117) DevController: writing {'domain': 'xen002', 'protocol': 'vt100', 'uuid': '8dc5f3eb-5c78-35e1-7876-17c26fc6ad6e', 'frontend': '/local/domain/16/device/console/0', 'state': '1', 'location': '2', 'online': '1', 'frontend-id': '16'} to /local/domain/0/backend/console/16/0.
[2007-09-02 05:26:52 8597] DEBUG (DevController:148) Waiting for devices vif.
[2007-09-02 05:26:53 8597] DEBUG (DevController:153) Waiting for 0.
[2007-09-02 05:26:53 8597] DEBUG (XendDomainInfo:823) Storing domain details: {'console/ring-ref': '34194913', 'image/entry': '-2145386496', 'console/port': '2', 'cpu/3/availability': 'online', 'store/ring-ref': '34194914', 'image/loader': 'generic', 'vm': '/vm/f146fdfc-e624-f7cb-4baf-0471f01f6014', 'control/platform-feature-multiprocessor-suspend': '1', 'cpu/2/availability': 'online', 'cpu/1/availability': 'online', 'image/features/writable-descriptor-tables': '1', 'image/virt-base': '-2147483648', 'memory/target': '524288', 'image/guest-version': '2.6', 'image/features/supervisor-mode-kernel': '1', 'image/guest-os': 'linux', 'console/limit': '1048576', 'image/paddr-offset': '-2147483648', 'image/hypercall-page': '-2145361920', 'image/suspend-cancel': '1', 'cpu/0/availability': 'online', 'image/features/pae-pgdir-above-4gb': '1', 'image/features/writable-page-tables': '1', 'image/features/auto-translated-physmap': '1', 'name': 'xen002', 'domid': '16', 'image/xen-version': 'xen-3.0', 'store/port': '1'} [2007-09-02 05:26:53 8597] DEBUG (XendDomainInfo:907) XendDomainInfo.handleShutdownWatch [2007-09-02 05:26:53 8597] DEBUG (DevController:541) hotplugStatusCallback /local/domain/0/backend/vif/16/0/hotplug-status.
[2007-09-02 05:26:53 8597] DEBUG (DevController:555) hotplugStatusCallback 1.
[2007-09-02 05:26:54 8597] DEBUG (DevController:148) Waiting for devices usb.
[2007-09-02 05:26:54 8597] DEBUG (DevController:148) Waiting for devices vbd.
[2007-09-02 05:26:54 8597] DEBUG (DevController:153) Waiting for 2048.
[2007-09-02 05:26:54 8597] DEBUG (DevController:541) hotplugStatusCallback /local/domain/0/backend/vbd/16/2048/hotplug-status.
[2007-09-02 05:26:54 8597] DEBUG (DevController:555) hotplugStatusCallback 1.
[2007-09-02 05:26:54 8597] DEBUG (DevController:148) Waiting for devices irq.
[2007-09-02 05:26:54 8597] DEBUG (DevController:148) Waiting for devices vkbd.
[2007-09-02 05:26:54 8597] DEBUG (DevController:148) Waiting for devices vfb.
[2007-09-02 05:26:55 8597] DEBUG (DevController:148) Waiting for devices console.
[2007-09-02 05:26:55 8597] DEBUG (DevController:153) Waiting for 0.
[2007-09-02 05:26:55 8597] DEBUG (DevController:148) Waiting for devices pci.
[2007-09-02 05:26:55 8597] DEBUG (DevController:148) Waiting for devices ioports.
[2007-09-02 05:26:55 8597] DEBUG (DevController:148) Waiting for devices tap.
[2007-09-02 05:26:55 8597] DEBUG (DevController:148) Waiting for devices vtpm.
[2007-09-02 05:26:55 8597] INFO (XendDomain:1117) Domain xen002 (16) unpaused.
...
... [vms xen003 to xen262 deleted]
...
[2007-09-02 17:44:28 8597] DEBUG (XendDomainInfo:78) XendDomainInfo.create(['vm', ['name', 'xen263'], ['memory', 512], ['vcpus', 4], ['on_xend_start', 'ignore'], ['on_xend_stop', 'ignore'], ['image', ['linux', ['kernel', '/boot/vmlinuz-xen'], ['ramdisk', '/boot/initrd-xen'], ['ip', '10.0.29.63:1.2.3.4::255.254.0.0::eth0:off'], ['root', '/dev/sda2 ro'], ['args', ' xencons=tty1 3']]], ['device', ['vbd', ['uname', 'phy:/tmp/xendevs/xen263'], ['dev', 'sda'], ['mode', 'w']]], ['device', ['vif', ['mac', '00:16:3e:0d:a0:01']]]]) [2007-09-02 17:44:28 8597] DEBUG (XendDomainInfo:1418) XendDomainInfo.constructDomain [2007-09-02 17:44:28 8597] DEBUG (balloon:114) Balloon: 32978616 KiB free; need 2048; done.
[2007-09-02 17:44:28 8597] DEBUG (XendDomain:434) Adding Domain: 277
[2007-09-02 17:44:28 8597] DEBUG (XendDomainInfo:1472) XendDomainInfo.initDomain: 277 256 [2007-09-02 17:44:29 8597] DEBUG (XendDomainInfo:1503) _initDomain:shadow_memory=0x0, memory_static_max=0x20000000, memory_static_min=0x0. [2007-09-02 17:44:29 8597] DEBUG (balloon:114) Balloon: 32978608 KiB free; need 524288; done. [2007-09-02 17:44:29 8597] INFO (image:128) buildDomain os=linux dom=277 vcpus=4
[2007-09-02 17:44:29 8597] DEBUG (image:197) domid          = 277
[2007-09-02 17:44:29 8597] DEBUG (image:198) memsize        = 512
[2007-09-02 17:44:29 8597] DEBUG (image:199) image = /boot/vmlinuz-xen
[2007-09-02 17:44:29 8597] DEBUG (image:200) store_evtchn   = 1
[2007-09-02 17:44:29 8597] DEBUG (image:201) console_evtchn = 2
[2007-09-02 17:44:29 8597] DEBUG (image:202) cmdline = root=/dev/sda2 ro ip=10.0.29.63:1.2.3.4::255.254.0.0::eth0:off xencons=tty1 3
[2007-09-02 17:44:29 8597] DEBUG (image:203) ramdisk        = /boot/initrd-xen
[2007-09-02 17:44:29 8597] DEBUG (image:204) vcpus          = 4
[2007-09-02 17:44:29 8597] DEBUG (image:205) features       =
[2007-09-02 17:44:30 8597] INFO (XendDomainInfo:1321) createDevice: vbd : {'uuid': '9d639202-73af-64ec-451d-3abe0fc57bc7', 'bootable': 1, 'driver': 'paravirtualised', 'dev': 'sda', 'uname': 'phy:/tmp/xendevs/xen263', 'mode': 'w'} [2007-09-02 17:44:30 8597] DEBUG (DevController:115) DevController: writing {'virtual-device': '2048', 'device-type': 'disk', 'protocol': 'x86_64-abi', 'backend-id': '0', 'state': '1', 'backend': '/local/domain/0/backend/vbd/277/2048'} to /local/domain/277/device/vbd/2048. [2007-09-02 17:44:30 8597] DEBUG (DevController:117) DevController: writing {'domain': 'xen263', 'frontend': '/local/domain/277/device/vbd/2048', 'uuid': '9d639202-73af-64ec-451d-3abe0fc57bc7', 'dev': 'sda', 'state': '1', 'params': '/tmp/xendevs/xen263', 'mode': 'w', 'online': '1', 'frontend-id': '277', 'type': 'phy'} to /local/domain/0/backend/vbd/277/2048. [2007-09-02 17:44:30 8597] INFO (XendDomainInfo:1321) createDevice: vif : {'mac': '00:16:3e:0d:a0:01', 'uuid': 'a126d815-fd4a-332b-c881-235a7e003cfb'} [2007-09-02 17:45:02 8597] DEBUG (DevController:115) DevController: writing {'mac': '00:16:3e:0d:a0:01', 'handle': '0', 'protocol': 'x86_64-abi', 'backend-id': '0', 'state': '1', 'backend': '/local/domain/0/backend/vif/277/0'} to /local/domain/277/device/vif/0. [2007-09-02 17:45:02 8597] DEBUG (DevController:117) DevController: writing {'domain': 'xen263', 'handle': '0', 'uuid': 'a126d815-fd4a-332b-c881-235a7e003cfb', 'script': '/etc/xen/scripts/vif-bridge', 'state': '1', 'frontend': '/local/domain/277/device/vif/0', 'mac': '00:16:3e:0d:a0:01', 'online': '1', 'frontend-id': '277', 'type': 'netfront'} to /local/domain/0/backend/vif/277/0. [2007-09-02 17:45:56 8597] DEBUG (XendDomainInfo:1978) Storing VM details: {'on_xend_stop': 'ignore', 'shadow_memory': '0', 'uuid': '8f8f9839-dd61-b9cd-89a6-f66bb3d41726', 'on_reboot': 'restart', 'start_time': '1188769556.11', 'on_poweroff': 'destroy', 'on_xend_start': 'ignore', 'on_crash': 'restart', 'xend/restart_count': '0', 'vcpus': '4', 'vcpu_avail': '15', 'image': "(linux (kernel /boot/vmlinuz-xen) (ramdisk /boot/initrd-xen) (args 'root=/dev/sda2 ro ip=10.0.29.63:1.2.3.4::255.254.0.0::eth0:off xencons=tty1 3') (notes (FEATURES 'writable_page_tables|writable_descriptor_tables|auto_translated_physmap|pae_pgdir_above_4gb|supervisor_mode_kernel') (VIRT_BASE -2147483648) (GUEST_VERSION 2.6) (PADDR_OFFSET -2147483648) (GUEST_OS linux) (HYPERCALL_PAGE -2145361920) (LOADER generic) (SUSPEND_CANCEL 1) (ENTRY -2145386496) (XEN_VERSION xen-3.0)))", 'name': 'xen263'} [2007-09-02 17:45:58 8597] DEBUG (XendDomainInfo:823) Storing domain details: {'console/ring-ref': '5227479', 'image/entry': '-2145386496', 'console/port': '2', 'cpu/3/availability': 'online', 'store/ring-ref': '5227480', 'image/loader': 'generic', 'vm': '/vm/8f8f9839-dd61-b9cd-89a6-f66bb3d41726', 'control/platform-feature-multiprocessor-suspend': '1', 'cpu/2/availability': 'online', 'cpu/1/availability': 'online', 'image/features/writable-descriptor-tables': '1', 'image/virt-base': '-2147483648', 'memory/target': '524288', 'image/guest-version': '2.6', 'image/features/supervisor-mode-kernel': '1', 'image/guest-os': 'linux', 'console/limit': '1048576', 'image/paddr-offset': '-2147483648', 'image/hypercall-page': '-2145361920', 'image/suspend-cancel': '1', 'cpu/0/availability': 'online', 'image/features/pae-pgdir-above-4gb': '1', 'image/features/writable-page-tables': '1', 'image/features/auto-translated-physmap': '1', 'name': 'xen263', 'domid': '277', 'image/xen-version': 'xen-3.0', 'store/port': '1'} [2007-09-02 17:47:25 8597] DEBUG (DevController:115) DevController: writing {'protocol': 'x86_64-abi', 'state': '1', 'backend-id': '0', 'backend': '/local/domain/0/backend/console/277/0'} to /local/domain/277/device/console/0. [2007-09-02 17:47:25 8597] DEBUG (DevController:117) DevController: writing {'domain': 'xen263', 'protocol': 'vt100', 'uuid': 'd0da45dd-1a00-da65-61dd-66dadd6e9897', 'frontend': '/local/domain/277/device/console/0', 'state': '1', 'location': '2', 'online': '1', 'frontend-id': '277'} to /local/domain/0/backend/console/277/0. [2007-09-02 17:47:26 8597] DEBUG (XendDomainInfo:823) Storing domain details: {'console/ring-ref': '5227479', 'image/entry': '-2145386496', 'console/port': '2', 'cpu/3/availability': 'online', 'store/ring-ref': '5227480', 'image/loader': 'generic', 'vm': '/vm/8f8f9839-dd61-b9cd-89a6-f66bb3d41726', 'control/platform-feature-multiprocessor-suspend': '1', 'cpu/2/availability': 'online', 'cpu/1/availability': 'online', 'image/features/writable-descriptor-tables': '1', 'image/virt-base': '-2147483648', 'memory/target': '524288', 'image/guest-version': '2.6', 'image/features/supervisor-mode-kernel': '1', 'image/guest-os': 'linux', 'console/limit': '1048576', 'image/paddr-offset': '-2147483648', 'image/hypercall-page': '-2145361920', 'image/suspend-cancel': '1', 'cpu/0/availability': 'online', 'image/features/pae-pgdir-above-4gb': '1', 'image/features/writable-page-tables': '1', 'image/features/auto-translated-physmap': '1', 'name': 'xen263', 'domid': '277', 'image/xen-version': 'xen-3.0', 'store/port': '1'} [2007-09-02 17:47:27 8597] DEBUG (XendDomainInfo:907) XendDomainInfo.handleShutdownWatch
[2007-09-02 17:48:23 8597] DEBUG (DevController:148) Waiting for devices vif.
[2007-09-02 17:48:23 8597] DEBUG (DevController:153) Waiting for 0.
[2007-09-02 17:48:23 8597] DEBUG (DevController:541) hotplugStatusCallback /local/domain/0/backend/vif/277/0/hotplug-status.
[2007-09-02 17:48:23 8597] DEBUG (DevController:555) hotplugStatusCallback 1.
[2007-09-02 17:48:24 8597] DEBUG (DevController:148) Waiting for devices usb.
[2007-09-02 17:48:24 8597] DEBUG (DevController:148) Waiting for devices vbd.
[2007-09-02 17:48:24 8597] DEBUG (DevController:153) Waiting for 2048.
[2007-09-02 17:48:25 8597] DEBUG (DevController:541) hotplugStatusCallback /local/domain/0/backend/vbd/277/2048/hotplug-status.
[2007-09-02 17:48:25 8597] DEBUG (DevController:555) hotplugStatusCallback 1.
[2007-09-02 17:48:25 8597] DEBUG (DevController:148) Waiting for devices irq.
[2007-09-02 17:48:25 8597] DEBUG (DevController:148) Waiting for devices vkbd.
[2007-09-02 17:48:25 8597] DEBUG (DevController:148) Waiting for devices vfb.
[2007-09-02 17:48:26 8597] DEBUG (DevController:148) Waiting for devices console.
[2007-09-02 17:48:26 8597] DEBUG (DevController:153) Waiting for 0.
[2007-09-02 17:48:26 8597] DEBUG (DevController:148) Waiting for devices pci.
[2007-09-02 17:48:26 8597] DEBUG (DevController:148) Waiting for devices ioports.
[2007-09-02 17:48:26 8597] DEBUG (DevController:148) Waiting for devices tap.
[2007-09-02 17:48:26 8597] DEBUG (DevController:148) Waiting for devices vtpm.
[2007-09-02 17:48:26 8597] INFO (XendDomain:1117) Domain xen263 (277) unpaused.


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