Есть хост – NixOS.
Есть ВМ – Centos 7.
Запускаю ВМ такой командой:
qemu-system-x86_64 -hda VM/cent.img -boot d -m 25600 -enable-kvm -machine q35,accel=kvm -device intel-iommu -cpu host
Производительность процессора на хосте:
$ sysbench --test=cpu --max-requests --num-threads=12 run
WARNING: the --test option is deprecated. You can pass a script name or path on the command line without any options.
WARNING: --num-threads is deprecated, use --threads instead
sysbench 1.0.15 (using bundled LuaJIT 2.1.0-beta2)
Running the test with following options:
Number of threads: 12
Initializing random number generator from current time
Prime numbers limit: 10000
Initializing worker threads...
Threads started!
CPU speed:
events per second: 14870.07
General statistics:
total time: 10.0008s
total number of events: 148729
Latency (ms):
min: 0.75
avg: 0.81
max: 6.43
95th percentile: 0.81
sum: 119984.65
Threads fairness:
events (avg/stddev): 12394.0833/15.39
execution time (avg/stddev): 9.9987/0.00
Производительность CPU в ВМ:
$ sysbench --test=cpu --max-requests --num-threads=12 run
WARNING: the --test option is deprecated. You can pass a script name or path on the command line without any options.
WARNING: --num-threads is deprecated, use --threads instead
sysbench 1.0.9 (using system LuaJIT 2.0.4)
Running the test with following options:
Number of threads: 12
Initializing random number generator from current time
Prime numbers limit: 10000
Initializing worker threads...
Threads started!
CPU speed:
events per second: 1570.35
General statistics:
total time: 10.0032s
total number of events: 15710
Latency (ms):
min: 0.62
avg: 7.59
max: 261.63
95th percentile: 121.08
sum: 119291.80
Threads fairness:
events (avg/stddev): 1309.1667/4.90
execution time (avg/stddev): 9.9410/0.04
Машина стартует в 64 бит, с iommu от Intel, с ускорением kvm. Чего ещё не хватает для такой же производительности, как на хосте?
Графика тоже тормозит порядочно, окружение на ВМ – XFCE.
QEMU версии 3.0.0. Версия BIOS последняя. МП – ASRock Z370 Pro 4.
