VMware ESXi e Intel DC3700 (NVMe) baixo desempenho mesmo com o driver da Intel

Question

Estou executando o VMware ESXi 6.0.0 com o Intel DC3700 de 800 GB.

Minha VM está executando o Windows 10 x64 com 8 GB de RAM e 4 núcleos de CPU. A VM inteira tem 32 GB e fica no SSD.

Estou usando o CrystalDiskMark no tamanho de arquivos de 1GiB e estou preocupado com a leitura sequencial:

• Quando instalo o Windows diretamente no SSD, obtenho velocidades de leitura de 2700MB / s.
• Antes de instalar o VMW-ESX-5.5.0-intel-nvme-1.0e.1.1-2791094, eu estava recebendo uma leitura de 800MB / s.
• Agora que já o instalei, só consigo ler 1700MB / s.

O que eu poderia estar perdendo que está causando lentidão?

[root@localhost:~] esxcfg-scsidevs -a
vmhba38 ahci              link-n/a  sata.vmhba38                            (0000:00:1f.2) Intel Corporation Wellsburg AHCI Controller
vmhba39 ahci              link-n/a  sata.vmhba39                            (0000:00:1f.2) Intel Corporation Wellsburg AHCI Controller
vmhba0  ahci              link-n/a  sata.vmhba0                             (0000:00:11.4) Intel Corporation Wellsburg AHCI Controller
vmhba1  ahci              link-n/a  sata.vmhba1                             (0000:00:1f.2) Intel Corporation Wellsburg AHCI Controller
vmhba2  intel-nvme        link-n/a  pscsi.vmhba2                            (0000:04:00.0) Intel Corporation DC P3700 AIC
vmhba40 ahci              link-n/a  sata.vmhba40                            (0000:00:1f.2) Intel Corporation Wellsburg AHCI Controller
vmhba41 pernixgateway     link-n/a  gsan.0430f73826a28                      () Unknown
vmhba32 usb-storage       link-n/a  usb.vmhba32                             () USB
vmhba33 ahci              link-n/a  sata.vmhba33                            (0000:00:11.4) Intel Corporation Wellsburg AHCI Controller
vmhba34 ahci              link-n/a  sata.vmhba34                            (0000:00:11.4) Intel Corporation Wellsburg AHCI Controller
vmhba35 ahci              link-n/a  sata.vmhba35                            (0000:00:11.4) Intel Corporation Wellsburg AHCI Controller
vmhba36 ahci              link-n/a  sata.vmhba36                            (0000:00:1f.2) Intel Corporation Wellsburg AHCI Controller
vmhba37 ahci              link-n/a  sata.vmhba37                            (0000:00:1f.2) Intel Corporation Wellsburg AHCI Controller
[root@localhost:~] for a in $(esxcfg-scsidevs -a |awk '{print $2}') ;do vmkload_mod -s $a |grep -i version ;done
Version: Version 3.0-22vmw, Build: 3029758, Interface: 9.2 Built on: Aug 31 2015
Version: Version 3.0-22vmw, Build: 3029758, Interface: 9.2 Built on: Aug 31 2015
Version: Version 3.0-22vmw, Build: 3029758, Interface: 9.2 Built on: Aug 31 2015
Version: Version 3.0-22vmw, Build: 3029758, Interface: 9.2 Built on: Aug 31 2015
Version: 1.0e.1.1-1OEM.550.0.0.1391871
Version: Version 3.0-22vmw, Build: 3029758, Interface: 9.2 Built on: Aug 31 2015
Version: Version 1.0-3vmw, Build: 3029758, Interface: 9.2 Built on: Aug 31 2015
Version: Version 3.0-22vmw, Build: 3029758, Interface: 9.2 Built on: Aug 31 2015
Version: Version 3.0-22vmw, Build: 3029758, Interface: 9.2 Built on: Aug 31 2015
Version: Version 3.0-22vmw, Build: 3029758, Interface: 9.2 Built on: Aug 31 2015
Version: Version 3.0-22vmw, Build: 3029758, Interface: 9.2 Built on: Aug 31 2015
Version: Version 3.0-22vmw, Build: 3029758, Interface: 9.2 Built on: Aug 31 2015