HP c-Class Performance Tuning manual Handling PCIe errors

Send the bundle to support@fusionio.com, and request assistance in debugging a performance issue. [Reviewers: how do HP customers handle this?]

Below is an example of a bandwidth error reported by fio-pci-check, caused by an over-subscription condition. Any line indicated with an asterisk indicates a possible problem detected by the fio-pci-checkutility.

fio-pci-check

Root Bridge PCIe 3000 MB/sec

Bridge 00:02.00 (01-05)

*Needed 3000 MB/sec Avail 2000 MB/sec

Bridge 01:00.00 (02-04)

*Needed 3000 MB/sec Avail 2000 MB/sec

Bridge 02:00.00 (03-03)

Needed 1000 MB/sec Avail 1000 MB/sec

ioDrive 03:00.0 Firmware 14071

Handling PCIe errors

Issue

Data errors might be introduced when data is passed across the bus.

Solution

PCIe detects, and in many situations, corrects, data errors. These errors can also be detected by running the fio-pci-checkutility.

NOTE: The fio-pci-checkutility is not fully functional on all operating systems.

If such errors are detected on your system:

1.Reseat all risers and IO Accelerators in the system.

2.Run some significant data to and from the IO Accelerator in question and check for errors again.

3.If the errors continue, the most common culprit is a riser card. Install a different riser card.

4.If errors persist, install a different motherboard.

5.If errors persist, install a new IO Accelerator.

The IO Accelerator causes PCI errors to show up faster than other devices do. Because of the high performance, the IO Accelerator is demanding on the PCI Express bus, showing errors in the system that other devices might not be able to uncover.

If multiple cards are installed in the system, use the fio-statuswhich of the drives is failing. The fio-statusutility returns the fio-beaconutility turns on the beacon LED for identification.

and fio-beaconutilities to determine serial number for the device, and the

Debugging performance issues 11