Changes between Version 69 and Version 70 of WikiStart

Timestamp:

Nov 5, 2014, 6:32:18 PM (10 years ago)

Author:

alain

Comment:

--

WikiStart

@@ -11 +11 @@
 The GIET_VM supports a paged virtual memory, with two types of pages BPP (Big Physical Pages: 2 Mbytes), and SPP (Small Physical Pages: 4 Kbytes). The physical memory allocation is fully static: all page tables (one page table per virtual space) are completely build and initialized in the boot phase. There is no page fault, and no swap on disk in the GIET_VM.
 
-The GIET_VM supports parallel multi-tasks user application. A GIET_VM user application is similar to a POSIX process: one virtual space per application. A task is similar to a Posix thread: all tasks in a given application share the same virtual space. Any task can be allocated to any processor, but the allocation is fully static : no task migration. The scheduling is pre-emptive, and uses a periodic timer interrupt. It implements a round-robin policy between all runnable tasks.Therefore, there is one private scheduler for each processor. 
+The GIET_VM supports parallel multi-tasks user applications. A GIET_VM user application is similar to a POSIX process: one virtual space per application. A task is similar to a Posix thread: all tasks in a given application share the same virtual space. Any task can be allocated to any processor, but the allocation is fully static : no task migration. 
 
-The target architecture is generic, and the parameter values (such as the number of clusters, or the number of cores per cluster) are defined in the [source:soft/giet_vm/hard_config.h hard_config.h] file. The GIET-VM itself has configuration parameters that are defined in the [source:soft/giet_vm/giet_config.h giet_config.h] file.
+When there is more than one task allocated to a processor, the scheduling is pre-emptive, and uses a periodic TICK interrupt. It implements a round-robin policy between all runnable tasks.Therefore, there is one private scheduler for each processor. 
+
+The target architecture is generic, and the parameter values (such as the number of clusters, or the number of cores per cluster) are defined in the [source:soft/giet_vm/hard_config.h hard_config.h] file. The GIET-VM configuration parameters (such as the TICK period, or the max number of open files)  are defined in the [source:soft/giet_vm/giet_config.h giet_config.h] file.