Hi all,
I would like to report that there's an issue that exists on XCP 1.6
beta (and 1.1 stable too) that results in very slow vm import/export,
causing high IO wait and load. The details are below, the machine is
freshly installed, without any modifications (like md raid, and so
on):
iostat:
avg-cpu: %user %nice %system %iowait %steal %idle
0,00 0,00 0,00 62,98 0,00 37,02
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz
avgqu-sz await svctm %util
sda 0,00 0,40 0,00 6,19 0,00 2184,83 353,10
3,76 553,87 161,61 100,00
sda1 0,00 0,00 0,00 0,60 0,00 35,13 58,67
0,75 1540,00 893,33 53,49
sda2 0,00 0,00 0,00 0,00 0,00 0,00 0,00
0,00 0,00 0,00 0,00
sda3 0,00 0,40 0,00 5,59 0,00 2149,70 384,64
3,01 448,21 178,93 100,00
sdb 0,00 0,00 0,00 0,00 0,00 0,00 0,00
0,00 0,00 0,00 0,00
dm-0 0,00 0,00 0,00 0,00 0,00 0,00 0,00
0,00 0,00 0,00 0,00
dm-1 0,00 0,00 0,00 6,39 0,00 2203,79 345,03
3,25 444,38 156,56 100,00
tda 0,00 215,57 0,00 25,15 0,00 2181,24 86,73
172,15 7475,32 39,76 100,00
top:
top - 17:26:48 up 13 min, 2 users, load average: 2.79, 1.63, 0.77
Tasks: 135 total, 1 running, 134 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0%us, 0.0%sy, 0.0%ni, 25.4%id, 74.6%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 762244k total, 747080k used, 15164k free, 238616k buffers
Swap: 524280k total, 0k used, 524280k free, 289188k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
5901 root 20 0 26424 8544 268 S 0.3 1.1 0:00.45
elasticsyslog
10758 root 20 0 2428 1104 820 R 0.3 0.1 0:00.02 top
1 root 20 0 2164 656 564 S 0.0 0.1 0:00.23 init
2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd
3 root RT 0 0 0 0 S 0.0 0.0 0:00.00
migration/0
4 root 20 0 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0
lspci:
00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM
Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation 3rd Gen Core processor PCI
Express Root Port (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core
processor Graphics Controller (rev 09)
00:14.0 USB controller: Intel Corporation 7 Series Chipset Family USB
xHCI Host Controller (rev 04)
00:16.0 Communication controller: Intel Corporation 7 Series Chipset
Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 7 Series Chipset Family USB
Enhanced Host Controller #2 (rev 04)
00:1c.0 PCI bridge: Intel Corporation 7 Series Chipset Family PCI
Express Root Port 1 (rev c4)
00:1c.4 PCI bridge: Intel Corporation 7 Series Chipset Family PCI
Express Root Port 5 (rev c4)
00:1c.6 PCI bridge: Intel Corporation 7 Series Chipset Family PCI
Express Root Port 7 (rev c4)
00:1d.0 USB controller: Intel Corporation 7 Series Chipset Family USB
Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation H77 Express Chipset LPC
Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family
6-port SATA AHCI Controller (rev 04)
00:1f.3 SMBus: Intel Corporation 7 Series Chipset Family SMBus
Controller (rev 04)
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 09)
04:00.0 IDE interface: Marvell Technology Group Ltd. 88SE9172 SATA III
6Gb/s RAID Controller (rev 11)
There is nothing visible in dmesg nor logs that could give a clue
where is the poor performance coming from: the xva was exported from
XCP 1.1 in about 3 minutes, the import takes about 30 minutes
(confirmed with few different xva's) and while importing the dom0
becomes extremely sluggish.
Any help would be highly appreciated.
Kind regards,
S.
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