On Sat, Mar 03, 2012 at 11:18:55PM +0200, Alexander Motin wrote:
> MSI interrupts could give a bit better performance. But with regular
> HDDs I think it is unlikely that you notice any difference. What's about
> about old driver, it never used MSI by default, while new one does.
I see, thanks.
> What board and chipset do you use? Have you tried to update BIOS? Please
I have not investigated a BIOS upgrade. I'll look into it.
> show `pciconf -lvcb` output about the controller.
the AHCI driver attachment:
ahci0@pci0:0:17:0: class=0x01018f card=0x43901002 chip=0x43901002 rev=0x00
hdr=0x00
vendor = 'ATI Technologies Inc'
device = 'SB7x0/SB8x0/SB9x0 SATA Controller [IDE mode]'
class = mass storage
subclass = ATA
bar [10] = type I/O Port, range 32, base 0x9000, size 8, enabled
bar [14] = type I/O Port, range 32, base 0x8000, size 4, enabled
bar [18] = type I/O Port, range 32, base 0x7000, size 8, enabled
bar [1c] = type I/O Port, range 32, base 0x6000, size 4, enabled
bar [20] = type I/O Port, range 32, base 0x5000, size 16, enabled
bar [24] = type Memory, range 32, base 0xfb9ffc00, size 1024, enabled
cap 05[50] = MSI supports 4 messages, 64 bit
cap 12[70] = SATA Index-Data Pair
the ATA driver attachment, included for completeness:
atapci0@pci0:0:20:1: class=0x01018a card=0x439c1002 chip=0x439c1002 rev=0x00
hdr=0x00
vendor = 'ATI Technologies Inc'
device = 'SB7x0/SB8x0/SB9x0 IDE Controller'
class = mass storage
subclass = ATA
bar [20] = type I/O Port, range 32, base 0xff00, size 16, enabled
cap 05[70] = MSI supports 2 messages
thanks,
Jeff
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