On 05/06/2015 07:07, Vijay Kilari wrote:
On Thu, Jun 4, 2015 at 7:24 PM, Ian Campbell <ian.campb...@citrix.com> wrote:
This information shall include at least:
- The Device ID of the device.
- The maximum number of Events which the device is capable of
generating.
When a device is discovered/registered (i.e. when all necessary
information is available) then:
- `struct its_device` and the embedded `events` array will be
allocated (the latter with `nr_events` elements).
- The `struct its_device` will be inserted into a mapping (possibly an
R-B tree) from its physical Device ID to the `struct its`.
Why not radix tree. It might be better in look up?
The lookup up in the radix tree is in O(k) where k is the size of the
index (i.e the number of DevID bits).
In the R-B tree, the lookup is in O(log(n)) where n is the number of
member in the tree.
As we use integer for the index, the R-B tree will be faster (The number
of PCI device per domain will never be too big).
Regards,
--
Julien Grall
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