On Fri, May 18, 2012 4:31 PM, Jiang Liu<liuj97@xxxxxxxxx> wrote:
On 05/18/2012 10:10 PM, Sosnowski, Maciej wrote:On Thu, May 07, May 10, 2012 3:59 AM, Jiang Liu<liuj97@xxxxxxxxx> wrote:devices
Hi Maciej,
I feel we may also need to tune the multiple IOH support in DCA.
Multiple IOH support is disabled for CB3.0 devices, how about CB3.1
supportedin Ivrbridge or SandyBridge? Does the hardware limitation still exist? Or
could we support multiple IOHs with IvyBridge and SandyBridge?
If multiple IOH is supported, I think we should move the logic to
disable multiple IOH support for CB3.0 from DCA core into ioatdma. I have
also prepared two patches for that two.
Thanks!
At this point I do not think we would need to tune multiple IOH for DCA.
The limitation you mention applies only to CB3.0. I do not think DCA is
with Sandy Bridge / Ivy Bridge regardless of multi-IOH case but let meconfirm ityet.It seems that Intel introduces DDIO technology for IvyBridge. Does it replace
DCA
technology on new platforms?
Thanks!
Yes, in general DDIO is used instead of DCA on new platforms.
Note however that DDIO is supported in Xeon E5 only, not in Xeon E3.
Thanks,
Maciej