Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

Linux Kernel時ÐòµÄÈý種機ÖÆ

×î½üÔÚ寫Driver時£¬³£³£Óöµ½ÐèÒª¡¸µÈ´ýÒ»¶Î時間¡¹ÔÙ處ÀíµÄ動×÷£¬ÒÔÍùÎÒ¶¼ÉµÉµµÄÓÃmsleep()»òmdelay()£¬Êâ²»Öª這種busy waiting會holdסcpu資Ô´£¬ÔÚ這¶ÎÆÚ間內¶¼無·¨讓給ÆäËûprocess執ÐУ¬時間¶Ì(10msÒÔϵÈ級)»ò許還¿ÉÒÔ£¬Ì«長¾Í²»ÐÐÁË£¬ËùÒÔÐèÒªKernel±¾Éí¾ÍÓÐÌṩµÄ¡¸時Ðò¡¹機ÖÆ來×ö處Àí£¬ì¶ÊÇÎÒ漸漸學會ÁËÈçºÎʹÓÃTimer¡¢TaskletºÍWorkqueueµÄÓ÷¨£¬ÔÚO'ReillyµÄLinux Device DriversµÚÆßÕÂÓÐ詳細µÄ講½â£¬ÎÒ將書Éϵľ«華茲簡單ÕûÀíÈçÏ£º
##CONTINUE##
Ò»¡¢Timer
#include <linux/timer.h>
struct timer_list
{
/* ... */
unsigned long expires;//ÆÚÍû運ÐÐµÄ jiffies Öµ
void (*function)(unsigned long);
unsigned long data;//傳給functionµÄ參數
};//ʹÓÃǰ±Ø須³õʼ»¯
void init_timer(struct timer_list *timer);
//³õʼ»¯Ò»個timer_list
struct timer_list TIMER_INITIALIZER(_function, _expires, _data);
//³õʼ»¯Ò»個靜態µÄtimer_list
void add_timer(struct timer_list * timer);
int mod_timer(struct timer_list *timer, unsigned long expires);
int del_timer(struct timer_list * timer);
int del_timer_sync(struct timer_list *timer);
//ͬ del_timer Ò»樣,µ«±£證º¯數return時£¬¶¨時Æ÷º¯數²»ÔÚÈκΠCPU ÉÏ運ÐÐ
//±ÜÃâÔÚSMP ϵ統ÉÏ競爭
int timer_pending(const struct timer_list * timer);
//·µ»ØÕæ»ò¼Ù來ָʾÊÇ·ñ¶¨時Æ÷Òѱ»運ÐÐ
¶þ¡¢Tasklet
#include <linux/interrupt.h>
struct tasklet_struct {
/* ... */
void (*func)(unsigned long);
unsigned long data;
};
void tasklet_init(struct tasklet_struct *t,
void (*func)(unsigned long), unsigned long data);
//將¶¨義ºÃµÄ結構體³õʼ»¯£¬²Å¿ÉÓÃ
DECLARE_TASKLET(name, func, data);
//Ö±½ÓÉêÃ÷¾Í¿ÉÓÃÁË
DECLARE_TASKLET_DISABLED(name, func, data);
void tasklet_disable(struct


Ïà¹ØÎĵµ£º

ʵսLinux Bluetooth±à³Ì£¨ËÄ£© L2CAP²ã±à³Ì

£¨L2CAPЭÒé¼ò½é£¬L2CAPÔÚBlueZÖеÄʵÏÖÒÔ¼°L2CAP±à³Ì½Ó¿Ú£©
Ò»£ºL2CAPЭÒé¼ò½é£º
Logical Link Control and Adaptation Protocol(L2CAP)
Âß¼­Á¬½Ó¿ØÖƺÍÊÊÅäЭÒé (L2CAP) ΪÉϲãЭÒéÌá¹©ÃæÏòÁ¬½ÓºÍÎÞÁ¬½ÓµÄÊý¾Ý·þÎñ£¬²¢Ìṩ¶àЭÒ鹦ÄܺͷָîÖØ×é²Ù×÷¡£L2CAP ³äÐíÉϲãЭÒéºÍÓ¦ÓÃÈí¼þ´«ÊäºÍ½ÓÊÕ×î´ó³¤¶ÈΪ 64K µÄ L2CAP Ê ......

ʵսLinux Bluetooth±à³Ì (Æß) SDPЭÒé

Service Discovery Protocol(SDP)ÌṩһÖÖÄÜÁ¦£¬ÈÃÓ¦ÓóÌÐòÓз½·¨·¢ÏÖÄÄÖÖ·þÎñ¿ÉÓÃÒÔ¼°ÕâÖÖ·þÎñµÄÌØÐÔ¡£
·þÎñ·¢ÏÖЭÒé(SDP»òBluetooth SDP)ÔÚÀ¶ÑÀЭÒéÕ»ÖжÔÀ¶ÑÀ»·¾³ÖеÄÓ¦ÓóÌÐòÓÐÌØÊâµÄº¬Ò⣬·¢ÏÖÄĸö·þÎñÊÇ¿ÉÓõĺÍÈ·¶¨ÕâЩ¿ÉÓ÷þÎñµÄÌØÕ÷¡£SDP¶¨ÒåÁËbluetooth client·¢ÏÖ¿ÉÓÃbluetooth server·þÎñºÍËüÃǵÄÌØÕ÷µÄ·½·¨¡£ ......

Linux»·¾³µÄAMP°²×° MEMCACHED°²×°


MEMCACHED°²×°
Ò»¡¢·þÎñ¶Ë¡£ÏȰ²×°libevent£¬ÔÙ°²×°memcached¡££¨×¢£ºlibeventÊÇÒ»Ì×¿çÆ½Ì¨µÄʼþ´¦Àí½Ó¿ÚµÄ·â×°£¬Äܹ»¼æÈݰüÀ¨£ºWindows/Linux/BSD/SolarisµÈ²Ù×÷ϵͳµÄʼþ´¦Àí£©
1¡¢ÏÂÔØ×îа汾µÄlibeventºÍmemcached£¬±ÊÕߵݲװĿ¼Ϊ/soft
>cd /soft
>wget http://www.dange.com/memcached/dist/memcach ......

php¼ÓÈëlinuxϵͳÃüÁî


¼ÙÉèphp°²×°ÔÚ/usr/local/php5/bin/php£¬³õʼÔÚÃüÁîÐÐÖ´ÐÐPHPµÄʱºòÒªÊäÈëÒ»³¤´®µÄ·¾¶£¬eg£º
$>/usr/local/php5/bin/php phpinfo.php
·Ç³£µÄÂé·³£¬ÏÖÔÚÖ»Ð轫php¿½±´ÖÁusr/sbinĿ¼¼´¿ÉÖ±½ÓʹÓÃphpÃüÁeg£º
$>cp /usr/local/php5/bin/php /usr/sbin/
$>php phpinfo.php
......

JAVAµÃµ½Íø¿¨ÎïÀíµØÖ·(windowsºÍLinux)

ÔÚÎÒÃÇÔÚд³ÌÐòµÄ¹ý³ÌÖÐ,ÓÐЩʱºòÐèÒªÖªµÀһЩµçÄÔµÄÓ²¼þÐÅÏ¢,±ÈÈçÎÒÃÇдһЩÐèҪע²áµÄ³ÌÐòµÄʱºò,¾ÍÐèÒªµÃµ½Ä³¸öµçÄÔÌØ¶¨µÄÐÅÏ¢,Ò»°ãÀ´Ëµ,Íø¿¨µÄÎïÀíµØÖ·ÊDz»»áÖØ¸´µÄ,ÎÒÃÇÕýºÃ¿ÉÒÔÓÃËüÀ´×öΪÎÒÃÇʶ±ðһ̨µçÄԵıêÖ¾.ÄÇÈçºÎµÃµ½Íø¿¨µÄÎïÀíµØÖ·ÄØ?ÎÒÃÇ¿ÉÒÔ½èÖúÓÚProcessBuilderÕâ¸öÀà,Õâ¸öÀàÊÇJDK1.5мӵÄ,ÒÔǰҲ¿ÉÒÔÓÃRu ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ