XenServer HVM Mode & PV Mode 效能差異

簡單說,同一台 VM,只是換個 Mode 其餘不變,效能差三倍

使用 unixbench 測試

PV Mode

System Benchmarks Index ValuesBASELINERESULTINDEX
Dhrystone 2 using register variables116700.093713883.88030.3
Double-Precision Whetstone55.015201.52763.9
Execl Throughput43.01863.6433.4
File Copy 1024 bufsize 2000 maxblocks3960.0326645.9824.9
File Copy 256 bufsize 500 maxblocks1655.088218.5533.0
File Copy 4096 bufsize 8000 maxblocks5800.01070607.81845.9
Pipe Throughput12440.0442183.4355.5
Pipe-based Context Switching4000.087722.8219.3
Process Creation126.02510.3199.2
Shell Scripts (1 concurrent)42.45205.81227.8
Shell Scripts (8 concurrent)6.0527.4879.0
System Call Overhead15000.0232973.8155.3
System Benchmarks Index Score722.8

HVM Mode

System Benchmarks Index ValuesBASELINERESULTINDEX
Dhrystone 2 using register variables116700.098181600.38413.2
Double-Precision Whetstone55.015017.72730.5
Execl Throughput43.010649.22476.6
File Copy 1024 bufsize 2000 maxblocks3960.0616466.91556.7
File Copy 256 bufsize 500 maxblocks1655.0174158.91052.3
File Copy 4096 bufsize 8000 maxblocks5800.01833339.83160.9
Pipe Throughput12440.02909352.72338.7
Pipe-based Context Switching4000.0499221.71248.1
Process Creation126.011382.2903.3
Shell Scripts (1 concurrent)42.415033.63545.7
Shell Scripts (8 concurrent)6.02849.84749.6
System Call Overhead15000.01874689.81249.8
System Benchmarks Index Score2244.5
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