Changes between Version 7 and Version 8 of io_operations

Timestamp:

Oct 5, 2016, 5:42:19 PM (9 years ago)

Author:

alain

Comment:

--

io_operations

@@ -27 +27 @@
 Finally, each device descriptor for a generic device XYZ contains a link to the specific driver associated to the available hardware implementation. This link is established in the kernel initialization phase.
 
-* As '''internal peripheral''' are private resources, replicated in all clusters, the device descriptor is stored in the same cluster as the hardware device itself. Therefore, all access are local.
-* For '''external peripherals''', all hardware devices are shared resources located in the I/O cluster. To avoid contention, the device descriptors are distributed on all clusters, as uniformly as possible. Therefore, an I/O operation involve generally three clusters: the client cluster, the I/O cluster, and the cluster containing the device descriptor.
+* As '''internal peripheral''' are private resources, replicated in all clusters, the device descriptor is stored in the same cluster as the hardware device itself. Therefore, all accesses are local.
+* For '''external peripherals''', the hardware devices are shared resources located in the I/O cluster. To minimize contention, the device descriptors are distributed on all clusters, as uniformly as possible. Therefore, an I/O operation involve generally three clusters: the client cluster, the I/O cluster, and the cluster containing the device descriptor.