John Baldwin wrote:
On Thursday 13 November 2008 05:03:20 am Ronnel P. Maglasang wrote:
Hi All,
Is there a way to explicitly assign an interrupt
of a device? I'm running on 6.3 and the two NICs
share the same interrupt. Obviously this will affect
the performance if the NICs are exposed to heavy network
traffic.
# vmstat -i
interrupt total rate
<sniff>
irq11: em0 vr0+ 1081099 77
<sniff>
Total 16958562 1222
Looking at the driver's code, I have the initial though
that this is the place where I can modify.
--
adapter->res_interrupt = bus_alloc_resource_any(dev,
SYS_RES_IRQ, &rid, RF_SHAREABLE | RF_ACTIVE);
--
I've tried changing RF_SHAREABLE to RF_ALLOCATED or other
values but still could not get the desired result and worst
the device fail to initialize. Is this possible in 6.3?
You can not easily assign them, no. In many cases the interrupt pins from the
devices may be hardwired to a single input pin on an interrupt controller.
In that case there is nothing you can do. You can read more about the gory
details here:
http://people.freebsd.org/~jhb/papers/bsdcan/2007/
What was changed in 7.x in terms of assigning interrupts? I have another
box running on 7.0 (2 NICs). I noticed there are no devices sharing
interrupts. But if 6.x is installed on the same box (previous installation),
the two NICs will share the same interrupt. I'm now looking at the drivers.
I assume this is not NIC-firmware related.
_______________________________________________
[email protected] mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-hardware
To unsubscribe, send any mail to "[EMAIL PROTECTED]"
