Changeset 566 for trunk/kernel/syscalls/sys_write.c

Timestamp:

Oct 4, 2018, 11:50:21 PM (6 years ago)

Author:

alain

Message:

Complete restructuration of kernel locks.

File:

• trunk/kernel/syscalls/sys_write.c (modified) (6 diffs)

trunk/kernel/syscalls/sys_write.c

@@ -1 +1 @@
 /*
- * sys_write.c - write bytes to a file
+ * sys_write.c - Kernel function implementing the "write" system call.
  * 
  * Author        Alain Greiner (2016,2017,2018)
@@ -29 +29 @@
 #include <errno.h>
 #include <vfs.h>
+#include <vmm.h>
 #include <thread.h>
 #include <printk.h>
 #include <process.h>
 
-/* TODO: concurrent user page(s) unmap need to be handled [AG] */
 
 extern uint32_t enter_sys_write;
@@ -64 +64 @@
         process_t  * process = this->process;
 
+#if (DEBUG_SYS_WRITE || CONFIG_INSTRUMENTATION_SYSCALLS)
+uint64_t     tm_start = hal_get_cycles();
+#endif
+
 #if DEBUG_SYS_WRITE
-uint32_t     tm_start;
-uint32_t     tm_end;
 tm_start = hal_get_cycles();
 if( DEBUG_SYS_WRITE < tm_start )
@@ -123 +125 @@
  
     // get file type
-    vfs_inode_type_t type = hal_remote_lw( XPTR( file_cxy , &file_ptr->type ) );
+    vfs_inode_type_t type = hal_remote_l32( XPTR( file_cxy , &file_ptr->type ) );
 
     // enable IRQs
@@ -132 +134 @@
     {
         // check file writable
-        uint32_t attr = hal_remote_lw( XPTR( file_cxy , &file_ptr->attr ) );
+        uint32_t attr = hal_remote_l32( XPTR( file_cxy , &file_ptr->attr ) );
         if( (attr & FD_ATTR_WRITE_ENABLE) == 0 )
             {
@@ -192 +194 @@
     hal_fence();
 
+#if (DEBUG_SYS_WRITE || CONFIG_INSTRUMENTATION_SYSCALLS)
+uint64_t     tm_end = hal_get_cycles();
+#endif
+
 #if DEBUG_SYS_WRITE
-tm_end = hal_get_cycles();
 if( DEBUG_SYS_WRITE < tm_end )
-printk("\n[DBG] %s : thread %x in process %x exit / cycle %d / cost %d\n",
-__FUNCTION__, this->trdid, process->pid, (uint32_t)tm_start, (uint32_t)(tm_end - tm_start) );
-#endif
- 
+printk("\n[DBG] %s : thread %x in process %x exit / cycle %d\n",
+__FUNCTION__, this->trdid, process->pid, (uint32_t)tm_end );
+#endif
+ 
+#if CONFIG_INSTRUMENTATION_SYSCALLS
+hal_atomic_add( &syscalls_cumul_cost[SYS_WRITE] , tm_end - tm_start );
+hal_atomic_add( &syscalls_occurences[SYS_WRITE] , 1 );
+#endif
+
 #if (DEBUG_SYS_WRITE & 1) 
 exit_sys_write = (uint32_t)tm_end;