performance: 0.682
device: 0.554
debug: 0.462
TCG: 0.369
ppc: 0.365
risc-v: 0.352
VMM: 0.346
network: 0.335
KVM: 0.316
PID: 0.309
boot: 0.307
vnc: 0.283
semantic: 0.272
graphic: 0.262
files: 0.224
i386: 0.222
register: 0.160
arm: 0.139
x86: 0.131
mistranslation: 0.121
kernel: 0.110
socket: 0.101
virtual: 0.082
user-level: 0.079
architecture: 0.079
permissions: 0.077
peripherals: 0.060
hypervisor: 0.032
assembly: 0.008

block copy job sometimes hangs on the last block for minutes