[please do not post HTML messages, and stick to plain text]
On 2020-05-17 03:29, Roja Eswaran wrote:
Hello,
I virtualized Raspi-4 and ran _sysbench - Memory_ on bare metal and
the VM.
The performance of VM is better than Host (Increase by 11%)
-> Both host and VM has the same OS
-> No Background Processes are running when sysbench is executed
-> Turned off Transparent huge pages in VM before booting
Yet getting the same performance difference.
Please let me know, What I am missing here
With this level of information, I can't tell you anything. Funnily
enough
you're not mentioning:
- what you are running (exact version and parameters of your benchmark)
- what you are running it on (host configuration, parameters of the VM
itself and its vmm, as "virualized Raspi-4" doesn't mean much to me)
- which kernel versions
- how you are measuring this discrepancy
- the variability of the measurement
Things you could look at: using perf capture the various counters and
work out by yourself where the difference lies, look at the impact
of power management on the host, the impact of other kernel threads
running, the number of interrupts...
HTH,
M.
--
Jazz is not dead. It just smells funny...
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