Hi Forum, After doing a clean install I am noticing very slow disk IO performanc. I am getting about 11 MBP/s. My Specifications are below
Motherboard: Asus DSBF-D12/SAD
Raid Card: Perc 5i with 4 disks in Raid 5
After doing some inverstigation I found that it could be related to IRQ conflict so I did some search to find the IRQ related information from ESXi 5. Following is the output of command that I ran and I need your expert opinon to check if this could be related to IRQ sharing.
vmkvsitools hwinfo -i
~ # vmkvsitools hwinfo -i
Vector PCPU 0 PCPU 1 PCPU 2 PCPU 3
0x20: 0 0 0 0 VMK ACPI Interrupt
0x30: 685 0 0 0 VMK keyboard
0x58: 1 0 0 0 VMK mouse
0x68: 1061 3274 387 313 VMK ata_piix
0x70: 1 0 0 0 VMK ata_piix
0x78: 2296 101 0 0 VMK megasas
0xa0: 16 13 594 943 VMK vmnic0
0xa8: 237 242 272 632 VMK vmnic1
0xdf: 271917 128257 123804 114660 VMK timer
0xe1: 0 0 0 0 VMK monitor
0xe9: 1895 2466 1300 1573 VMK resched
0xf1: 5340 2433 4713 4636 VMK tlb
0xf9: 0 0 0 0 VMK noop
0xfc: 0 0 0 0 VMK thermal
0xfd: 0 0 0 0 VMK lint1
0xfe: 0 0 0 0 VMK error
0xff: 0 0 0 0 VMK spurious
vmkvsitools hwinfo -p
~ # vmkvsitools hwinfo -p
Seg:Bus:Sl.F Vend:Dvid Subv:Subd ISA/irq/Vec P M Module Name
Spawned bus
000:000:00.0 8086:25d8 1043:81db 0/ / A V PCIe RP[000:000:00.0]
000:000:02.0 8086:25f7 0000:0000 V PCIe RP[000:000:02.0]
001
000:000:03.0 8086:25e3 0000:0000 V PCIe RP[000:000:03.0]
006
000:000:04.0 8086:25f8 0000:0000 V PCIe RP[000:000:04.0]
007
000:000:05.0 8086:25e5 0000:0000 V PCIe RP[000:000:05.0]
010
000:000:06.0 8086:25f9 0000:0000 V PCIe RP[000:000:06.0]
011
000:000:07.0 8086:25e7 0000:0000 V PCIe RP[000:000:07.0]
012
000:000:16.0 8086:25f0 1043:81db V
000:000:16.1 8086:25f0 1043:81db V
000:000:16.2 8086:25f0 1043:81db V
000:000:17.0 8086:25f1 1043:81db V
000:000:19.0 8086:25f3 1043:81db V
000:000:21.0 8086:25f5 1043:81db V
000:000:22.0 8086:25f6 1043:81db V
000:000:28.0 8086:2690 0000:0000 11/ 11/0x98 A V PCIe RP[000:000:28.0]
013
000:000:30.0 8086:244e 0000:0000 V
014
000:000:31.0 8086:2670 1043:81dc V
000:000:31.1 8086:269e 1043:81dc 255/ /0x78 A V ata_piix vmhba0
000:000:31.3 8086:269b 1043:81dc 10/ / B V
000:001:00.0 8086:3500 0000:0000 V
002
000:001:00.3 8086:350c 0000:0000 V
005
000:002:00.0 8086:3510 0000:0000 V
003
000:002:02.0 8086:3518 0000:0000 V
004
000:004:00.0 8086:1096 1043:8217 5/ 5/0xa0 A V e1000e vmnic0
000:004:00.1 8086:1096 1043:8217 10/ 10/0xa8 B V e1000e vmnic1
000:007:00.0 8086:0370 0000:0000 V
008
000:007:00.2 8086:0372 0000:0000 V
009
000:008:14.0 1028:0015 1028:1f02 5/ 5/0x78 A V megaraid_sas vmhba1
000:014:02.0 1002:515e 1043:81de 11/ 11/0x98 A V
As you can notice in the output above same IRQ (5) is being shared by both vmhba1 (PERC 5i) and vmnic0. Could this be the culprit for poor disk performance?
Regards,