root@pve:~# pveversion -v
proxmox-ve: 5.1-28 (running kernel: 4.13.8-2-pve)
pve-manager: 5.1-36 (running version: 5.1-36/131401db)
pve-kernel-4.13.4-1-pve: 4.13.4-26
pve-kernel-4.13.8-2-pve: 4.13.8-28
libpve-http-server-perl: 2.0-6
lvm2: 2.02.168-pve6
corosync: 2.4.2-pve3
libqb0: 1.0.1-1
pve-cluster: 5.0-15
qemu-server: 5.0-17
pve-firmware: 2.0-3
libpve-common-perl: 5.0-20
libpve-guest-common-perl: 2.0-13
libpve-access-control: 5.0-7
libpve-storage-perl: 5.0-16
pve-libspice-server1: 0.12.8-3
vncterm: 1.5-2
pve-docs: 5.1-12
pve-qemu-kvm: 2.9.1-2
pve-container: 2.0-17
pve-firewall: 3.0-3
pve-ha-manager: 2.0-3
ksm-control-daemon: 1.2-2
glusterfs-client: 3.8.8-1
lxc-pve: 2.1.0-2
lxcfs: 2.0.7-pve4
criu: 2.11.1-1~bpo90
novnc-pve: 0.6-4
smartmontools: 6.5+svn4324-1
zfsutils-linux: 0.7.3-pve1~bpo9
root@pve:~# grep '.*' /sys/firmware/acpi/interrupts/*
/sys/firmware/acpi/interrupts/error: 0
/sys/firmware/acpi/interrupts/ff_gbl_lock: 0 EN enabled unmasked
/sys/firmware/acpi/interrupts/ff_pmtimer: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/ff_pwr_btn: 0 EN enabled unmasked
/sys/firmware/acpi/interrupts/ff_rt_clk: 0 disabled unmasked
/sys/firmware/acpi/interrupts/ff_slp_btn: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe00: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe01: 0 EN enabled unmasked
/sys/firmware/acpi/interrupts/gpe02: 0 EN enabled unmasked
/sys/firmware/acpi/interrupts/gpe03: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe04: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe05: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe06: 4 EN enabled unmasked
/sys/firmware/acpi/interrupts/gpe07: 0 enabled unmasked
/sys/firmware/acpi/interrupts/gpe08: 0 disabled unmasked
/sys/firmware/acpi/interrupts/gpe09: 0 EN enabled unmasked
/sys/firmware/acpi/interrupts/gpe0A: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe0B: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe0C: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe0D: 0 disabled unmasked
/sys/firmware/acpi/interrupts/gpe0E: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe0F: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe10: 1 EN enabled unmasked
/sys/firmware/acpi/interrupts/gpe11: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe12: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe13: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe14: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe15: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe16: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe17: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe18: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe19: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe1A: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe1B: 0 EN enabled unmasked
/sys/firmware/acpi/interrupts/gpe1C: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe1D: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe1E: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe1F: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe20: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe21: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe22: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe23: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe24: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe25: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe26: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe27: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe28: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe29: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe2A: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe2B: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe2C: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe2D: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe2E: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe2F: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe30: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe31: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe32: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe33: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe34: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe35: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe36: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe37: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe38: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe39: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe3A: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe3B: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe3C: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe3D: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe3E: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe3F: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe_all: 5
/sys/firmware/acpi/interrupts/sci: 5
/sys/firmware/acpi/interrupts/sci_not: 0
root@pve:~#
try with the latest kernel and check again.
(pve-kernel-4.13.8-3-pve: 4.13.8-30)
Problem still there with Linux 4.13.13-1-pve #1 SMP PVE 4.13.13-31.
This is what happens cloning a VM over iSCSI (while in PVE 4.x it just takes 15% at most).
I will go back to PVE 4.x until someone will push a fix for this mess...
# pveversion -v
proxmox-ve: 5.1-25 (running kernel: 4.13.4-1-pve)
pve-manager: 5.1-35 (running version: 5.1-35/722cc488)
pve-kernel-4.13.4-1-pve: 4.13.4-25
libpve-http-server-perl: 2.0-6
lvm2: 2.02.168-pve6
corosync: 2.4.2-pve3
libqb0: 1.0.1-1
pve-cluster: 5.0-15
qemu-server: 5.0-17
pve-firmware: 2.0-3
libpve-common-perl: 5.0-20
libpve-guest-common-perl: 2.0-13
libpve-access-control: 5.0-7
libpve-storage-perl: 5.0-16
pve-libspice-server1: 0.12.8-3
vncterm: 1.5-2
pve-docs: 5.1-12
pve-qemu-kvm: 2.9.1-2
pve-container: 2.0-17
pve-firewall: 3.0-3
pve-ha-manager: 2.0-3
ksm-control-daemon: 1.2-2
glusterfs-client: 3.8.8-1
lxc-pve: 2.1.0-2
lxcfs: 2.0.7-pve4
criu: 2.11.1-1~bpo90
novnc-pve: 0.6-4
smartmontools: 6.5+svn4324-1
zfsutils-linux: 0.7.2-pve1~bpo90
# grep '.*' /sys/firmware/acpi/interrupts/*
/sys/firmware/acpi/interrupts/error: 0
/sys/firmware/acpi/interrupts/ff_gbl_lock: 0 EN enabled unmasked
/sys/firmware/acpi/interrupts/ff_pmtimer: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/ff_pwr_btn: 0 EN enabled unmasked
/sys/firmware/acpi/interrupts/ff_rt_clk: 0 disabled unmasked
/sys/firmware/acpi/interrupts/ff_slp_btn: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe00: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe01: 0 EN enabled unmasked
/sys/firmware/acpi/interrupts/gpe02: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe03: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe04: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe05: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe06: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe07: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe08: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe09: 0 EN enabled unmasked
/sys/firmware/acpi/interrupts/gpe0A: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe0B: 0 disabled unmasked
/sys/firmware/acpi/interrupts/gpe0C: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe0D: 0 disabled unmasked
/sys/firmware/acpi/interrupts/gpe0E: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe0F: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe10: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe11: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe12: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe13: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe14: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe15: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe16: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe17: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe18: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe19: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe1A: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe1B: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe1C: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe1D: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe1E: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe1F: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe20: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe21: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe22: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe23: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe24: 5 EN enabled unmasked
/sys/firmware/acpi/interrupts/gpe25: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe26: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe27: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe28: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe29: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe2A: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe2B: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe2C: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe2D: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe2E: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe2F: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe30: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe31: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe32: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe33: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe34: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe35: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe36: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe37: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe38: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe39: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe3A: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe3B: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe3C: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe3D: 0 invalid unmasked
/sys/firmware/acpi/interrupts/gpe3E: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe3F: 0 STS invalid unmasked
/sys/firmware/acpi/interrupts/gpe_all: 5
/sys/firmware/acpi/interrupts/sci: 5
/sys/firmware/acpi/interrupts/sci_not: 1
TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND 23 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/2]
17 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/1]
8 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/0]
77 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/11]
71 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/10]
65 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/9]
59 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/8]
53 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/7]
222 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/35]
216 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/34]
47 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/6]
41 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/5]
35 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/4]
210 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/33]
204 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/32]
29 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/3]
198 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/31]
192 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/30]
186 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/29]
162 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/25]
156 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/24]
180 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/28]
174 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/27]
168 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/26]
120 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/18]
108 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/16]
102 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/15]
96 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [ksoftirqd/14]
3357 be/4 root 0.00 B/s 0.00 B/s 0.00 % 99.99 % [kworker/u96:2]
# pveversion -v
proxmox-ve: 5.0-19 (running kernel: 4.10.17-2-pve)
pve-manager: 5.0-30 (running version: 5.0-30/5ab26bc)
pve-kernel-4.10.17-2-pve: 4.10.17-19
libpve-http-server-perl: 2.0-6
lvm2: 2.02.168-pve3
corosync: 2.4.2-pve3
libqb0: 1.0.1-1
pve-cluster: 5.0-12
qemu-server: 5.0-15
pve-firmware: 2.0-2
libpve-common-perl: 5.0-16
libpve-guest-common-perl: 2.0-11
libpve-access-control: 5.0-6
libpve-storage-perl: 5.0-14
pve-libspice-server1: 0.12.8-3
vncterm: 1.5-2
pve-docs: 5.0-9
pve-qemu-kvm: 2.9.0-3
pve-container: 2.0-15
pve-firewall: 3.0-2
pve-ha-manager: 2.0-2
ksm-control-daemon: 1.2-2
glusterfs-client: 3.8.8-1
lxc-pve: 2.0.8-3
lxcfs: 2.0.7-pve4
criu: 2.11.1-1~bpo90
novnc-pve: 0.6-4
smartmontools: 6.5+svn4324-1
zfsutils-linux: 0.6.5.9-pve16~bpo90
KVM only.