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update schedule 09-tuning

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This commit is contained in:
Cheng Jian
2019-07-26 16:45:36 +08:00
parent 581411df5f
commit b871dab562
5 changed files with 124 additions and 95 deletions
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study/driver/00-code/hello/hello.c
+4 -1
View File
@@ -13,7 +13,10 @@ MODULE_DESCRIPTION("hello world");
static int hello_init(void)
{
return 0;
set_current_state(TASK_UNINTERRUPTIBLE);
schedule();
return 0;
}
study/driver/00-code/hello/hello2.c
-47
View File
@@ -1,47 +0,0 @@
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/sched.h>
//#include <linux/list.h>
//#include <linux/mm.h>
//#include <linux/mm_types.h>
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Gatieme");
MODULE_DESCRIPTION("hello world");
/*
* print the module information
*/
static void print_module(void)
{
struct module *mod;
printk(KERN_ALERT "this module: %p==%p\n", &__this_module, THIS_MODULE);
printk(KERN_ALERT "module state: %d\n", THIS_MODULE->state);
printk(KERN_ALERT "module name: %s\n", THIS_MODULE->name);
list_for_each_entry(mod, *(&THIS_MODULE->list.prev), list);
printk(KERN_ALERT "module name: %s\n", mod->name);
printk(KERN_ALERT "module state: %d\n", THIS_MODULE->state);
}
static int hello_init(void)
{
print_module();
printk(KERN_ALERT "run in cpu %d\n", get_cpu());
printk(KERN_ALERT "PAGE_OFFSET : 0x%lx, TASK_SIZE : 0x%lx", PAGE_OFFSET,
TASK_SIZE);
return 0;
}
static void hello_exit(void)
{
printk(KERN_ERR "exit");
}
module_init(hello_init);
module_exit(hello_exit);
study/driver/00-code/hello/hello2.c~
-47
View File
@@ -1,47 +0,0 @@
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/sched.h>
//#include <linux/list.h>
//#include <linux/mm.h>
//#include <linux/mm_types.h>
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Gatieme");
MODULE_DESCRIPTION("hello world");
/*
* print the module information
*/
static void print_module(void)
{
struct module *mod;
printk(KERN_ALERT "this module: %p==%p\n", &__this_module, THIS_MODULE);
printk(KERN_ALERT "module state: %d\n", THIS_MODULE->state);
printk(KERN_ALERT "module name: %s\n", THIS_MODULE->name);
list_for_each_entry(mod, *(&THIS_MODULE->list.prev), list);
printk(KERN_ALERT "module name: %s\n", mod->name);
printk(KERN_ALERT "module state: %d\n", THIS_MODULE->state);
}
static int hello_init(void)
{
print_module();
printk(KERN_ALERT "run in cpu %d\n", get_cpu());
printk(KERN_ALERT "PAGE_OFFSET : 0x%lx, TASK_SIZE : 0x%lx", PAGE_OFFSET,
TASK_SIZE);
return 0;
}
static void hello_exit(void)
{
printk(KERN_ERR "exit");
}
module_init(hello_init);
module_exit(hello_exit);