Nice diagram! I see you have 4 LUNs for VMmark tiles, plus 1 LUN for DeployTemplate.
In my opinion, 9 disks per LUN, with 2 tiles per LUN is probably not fast enough storage. It would be adequate for 1 tile per LUN.
If you have not already, try this:
1. Run 5 tiles with 1 tile on each LUN (1-4) except for 1 LUN holding two tiles. (for example, tile 0 and tile 4 are both on LUN1)
2. In Score_5_Tile_Test, look at the QoS scores for the tiles which share the same LUN. Are the QoS scores higher than the other tiles? If so, this could indicate a storage bottleneck.
Also try changing Deploy/DeployLUNs="vm_lun1" to Deploy/DeployLUNs="vm_lun0". You should generally use different LUNs for DeployLUN and tile VMs so Deploy does not impact the workload VM performance.
One other thing that can cause unpredictable performance is if the server's power management setting in the BIOS is set to 'balanced' (power saving) or similar; you should always set to OS control.
Thanks,
Rebecca