Changeset 635 for trunk/kernel/syscalls/sys_fork.c

Timestamp:

Jun 26, 2019, 11:42:37 AM (5 years ago)

Author:

alain

Message:

This version is a major evolution: The physical memory allocators,
defined in the kmem.c, ppm.c, and kcm.c files have been modified
to support remote accesses. The RPCs that were previously user
to allocate physical memory in a remote cluster have been removed.
This has been done to cure a dead-lock in case of concurrent page-faults.

This version 2.2 has been tested on a (4 clusters / 2 cores per cluster)
TSAR architecture, for both the "sort" and the "fft" applications.

File:

• trunk/kernel/syscalls/sys_fork.c (modified) (5 diffs)

trunk/kernel/syscalls/sys_fork.c

@@ -72 +72 @@
 
 #if DEBUG_SYS_FORK
-if( DEBUG_SYS_FORK < tm_start )
+if( DEBUG_SYS_FORK < (uint32_t)tm_start )
 printk("\n[%s] thread[%x,%x] enter / cycle =  %d\n",
 __FUNCTION__, parent_pid, parent_thread_ptr->trdid, (uint32_t)tm_start );
@@ -109 +109 @@
 
 #if (DEBUG_SYS_FORK & 1 )
-if( DEBUG_SYS_FORK < tm_start )
+if( DEBUG_SYS_FORK < (uint32_t)tm_start )
 printk("\n[%s] thread[%x,%x] selected cluster %x\n",
 __FUNCTION__, parent_pid, parent_thread_ptr->trdid, child_cxy );
@@ -150 +150 @@
         }
 
-    // set remote child CPU context from parent_thread register values
+    // set the remote child CPU context from parent register values,
+    // set the remote child uzone from 
     // replicates the parent thread kernel stack to the child thread descriptor,
     // and finally unblock the child thread. 
@@ -171 +172 @@
 
 #if DEBUG_SYS_FORK
-if( DEBUG_SYS_FORK < tm_end )
+if( DEBUG_SYS_FORK < (uint32_t)tm_end )
 printk("\n[%s] parent thread[%x,%x] exit / child_pid %x / cycle %d\n",
 __FUNCTION__, current->process->pid, current->trdid, child_pid, (uint32_t)tm_end );
 #endif
 
-// only parent contribute to instrumentation
+// only parent display the parent and child VMM
+#if (DEBUG_SYS_FORK & 1 )
+if( DEBUG_SYS_FORK < (uint32_t)tm_end )
+{
+    process_t * child_process_ptr = hal_remote_lpt( XPTR( child_cxy , 
+                                                          &child_thread_ptr->process ) );
+    xptr_t      child_process_xp  = XPTR( child_cxy , child_process_ptr );
+
+    hal_vmm_display( ref_process_xp , true ); 
+    hal_vmm_display( child_process_xp , true );
+}
+#endif
+
+// only parent contribute to syscalls instrumentation
 #if CONFIG_INSTRUMENTATION_SYSCALLS
 hal_atomic_add( &syscalls_cumul_cost[SYS_FORK] , tm_end - tm_start );
@@ -187 +201 @@
 
 #if DEBUG_SYS_FORK
-if( DEBUG_SYS_FORK < tm_end )
+if( DEBUG_SYS_FORK < (uint32_t)tm_end )
 printk("\n[%s] child thread[%x,%x] exit / child_pid %x / cycle %d\n",
 __FUNCTION__, current->process->pid, current->trdid, child_pid, (uint32_t)tm_end );