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840
2016 Apr 10
2
CentOS7, Xen 4.6.1, kernel 3.18.25-19 strange performance problem
...16 threads:
real 1m41.983s
user 16m37.247s
sys 5m7.121s
32 threads:
real 1m29.240s
user 23m7.170s
sys 6m31.497s
kernel 3.18.25-19
16 threads:
real 1m12.909s
user 14m37.627s
sys 1m36.521s
32 threads:
real 1m0.530s
user 18m45.569s
sys 1m58.807s
Some notes:
- System is a HP z840 with 2*8core E5 v3 Xeon and 128gig Ram. Disk is an
Intel 750 ssd (PCIe nvme)
- While normally in Xen, I limit Dom0 Memory via dom0_mem, but for the
tests, Dom0 was allowed to use full memory
- While running the test, no guest was running except Dom0. System was
booted to graphical desktop and wa...