Change IRQ number in RHEL 6.4

Hi Guys

We have a HP Proliant DL380p Gen8 Server running with RHEL 6.4. This server also holds 2 Digium T1 Telephone cards. These cards share the IRQ 5 with other onboard PCI cards/devices. However while running some performance test with the card, we noticed that we are not able to obtain the maximum performance from these cards as they are sharing the IRQs with other devices. If we could assign a dedicated IRQ for these 2 devices, we would be able to obtain the best performance.

On that note, we contacted the Server manufacturer and the Card manufacturer. However Card manufacturer said there is nothing we can modify from their driver configuration to assign a different IRQ. And so the server manufacturer mentioned that we can't assign a dedicated IRQ for this device and need to check with OS side if they would all to do it.

That brings me here to this discussion forum. Could some experts on this field please advise if this is something that is doable from the RHEL OS? If it is possible, what is the right procedure to get it done?

Looking to hear from the experts here in this forum...

Regards
Jo