Changeset c05a50f in mainline

Timestamp:

2008-06-06T23:17:16Z (17 years ago)

Author:

Martin Decky <martin@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

8d62052

Parents:

1c03c17

Message:

rename SYS_IO to SYS_KLOG
do not notify uspace klog with every single character, introduce some latency

Location:

kernel/generic

Files:

• include/syscall/syscall.h (modified) (1 diff)
• src/console/console.c (modified) (2 diffs)
• src/syscall/syscall.c (modified) (2 diffs)

kernel/generic/include/syscall/syscall.h

@@ -37 +37 @@
 
 typedef enum {
-        SYS_IO = 0,
+        SYS_KLOG = 0,
         SYS_TLS_SET = 1, /* Hardcoded in AMD64, IA32 uspace - fibril.S */
         

kernel/generic/src/console/console.c

@@ -50 +50 @@
 
 #define KLOG_SIZE PAGE_SIZE
+#define KLOG_LATENCY 8
 
 /**< Kernel log cyclic buffer */
@@ -276 +277 @@
                 klog_uspace++;
         
+        /* Check notify uspace to update */
+        bool update;
+        if ((klog_uspace > KLOG_LATENCY) || (c == '\n'))
+                update = true;
+        else
+                update = false;
+        
         spinlock_unlock(&klog_lock);
         
-        klog_update();
+        if (update)
+                klog_update();
 }
 

kernel/generic/src/syscall/syscall.c

@@ -58 +58 @@
  *
  */
-static unative_t sys_io(int fd, const void * buf, size_t count) 
+static unative_t sys_klog(int fd, const void * buf, size_t count) 
 {
         size_t i;
@@ -115 +115 @@
 
 syshandler_t syscall_table[SYSCALL_END] = {
-        (syshandler_t) sys_io,
+        (syshandler_t) sys_klog,
         (syshandler_t) sys_tls_set,