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Hi @SamirD yes, I tried to disable hardware prefetching from BIOS and the performance slightly improves but still I haven't found a way to solve the major problem. Here is the result of the VM after h/w prefetching is disabled.

Hi @SamirD from the above screenshot, I believe NUMA settings are not the cause. What else do you suspect could be a cause?

After setting numa to 0:

Hi, I agree with @wolfgang that the comparison could be in the wrong way. I'm experiencing the same issue, and I believe there is a memory performance issue in Windows 10 VM. I did similar things with sysbench as you, but since the result is not comparable, I also go with another approach for...

Hi, any update/findings?

Hi @spirit That looks a huge performance improvement. Thank you for sharing this!

Hi, any update on this? Did you find anything to improve the performance here? For your case, Host: iodepth=1,numjob=1 bw=69831KB/s, iops=17457 VM: thread1,iodepth=1 write : IOPS=9224, BW=36.0MiB/s In my case, Host: iodepth=1,numjob=1 write: IOPS=20.4k, BW=79.6MiB/s (83.4MB/s) VM...

Hi @patrick7 After you changed disks, did you ever re-run the speed test on the host? 100-150MB/s is a big improvement but it seems to compare with the speed on the host, the IO overhead is still significant.

From what I see It seems set as VirtIO already.

Hi, probably I'm facing the same issue now. Do you have any findings till now?

Thanks for your reply, @mail1118

Hi @mail1118 did that resolve your issue? I'm asking because I'm facing the same issue. Thanks.

Got it. Thank you!

Hi, sorry for posting on an old thread. It seems the cache strategy has a significant impact on the performance. Just wondering if write-back is not ok, then what cache strategy do you recommend to use while still maintaining a quite good performance? Thanks.

Hi @sirkope it seems to me that the latter one is an HDMI dummy plug. hope that helps.