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

Linux»ñÈ¡ºÁÃ뼶ʱ¼ä


Linux»ñÈ¡ºÁÃ뼶ʱ¼ä
Moakap
ÔÚÈí¼þÉè¼ÆÖо­³£»áÓõ½¹ØÓÚʱ¼äµÄ´¦Àí£¬ÓÃÀ´¼ÆËãÓï¾ä¡¢º¯ÊýµÄÖ´ÐÐʱ¼ä£¬Õâʱ¾ÍÐèÒª¾«È·µ½ºÁÃëÉõÖÁÊÇ΢ÃîµÄʱ¼ä¡£
 
int gettimeofday(struct
timeval *tv, struct timezone *tz);
int settimeofday(const
struct timeval *tv , const struct timezone *tz);
 
struct timeval {
   
time_t      tv_sec;     /* seconds */
   
suseconds_t tv_usec;    /*
microseconds */
};
 
struct timezone {
   
int tz_minuteswest;     /* minutes
west of Greenwich
*/
    int
tz_dsttime;         /* type of DST
correction */
};
 
ÏÂÃæÊǸö¼òµ¥µÄÀý×Ó£¬ÓÃÀ´Í³¼Æ³ÌÐòµÄÖ´ÐÐʱ¼ä£º
       …
struct timeval
t_start,t_end;
   
long cost_time = 0;
 
//get start
time
gettimeofday(&t_start,
NULL);
printf("Start
time: %ld us", t_start.tv_usec);
 
//some
operation

 
//get end time
gettimeofday(&t_end,
NULL);
printf("End
time: %ld us", t_end.tv_usec);
 
//calculate
time slot
cost_time =
t_end.tv_usec - t_start.tv_usec;
printf("Cost
time: %ld us", cost_time);

 
Êä³ö£º
Start time:
438061 us
End time:
459867 us
Cost time:
21806 us


Ïà¹ØÎĵµ£º

redhat linux 5ÏÂoracle10.2°²×°×ܽá

ÔÚlinuxϰ²×°oracleÊǼþ·±ËöµÄÊÂÇé¡£¾ßÌåÀ´½²·ÖΪһϼ¸´ó²½£º
1.ÐÞ¸Äϵͳ°æ±¾
vi /etc/redhat-release
×¢Ê͵ôµÚÒ»ÐУ¬Ìí¼ÓÒ»ÐУºredhat-4
2.°²×°Èí¼þ°ü
rpm -Uvh setarch-2*
rpm -Uvh make-3*
rpm -Uvh glibc-2*
rpm -Uvh libaio-0*
rpm -Uvh compat-libstdc++-33-3*
rpm -Uvh compat-gcc-34-3*
rpm -Uvh comp ......

LinuxÖеÄÄÚ´æ·ÖÅäºÍÊÍ·ÅÖ®free_bootmem()º¯Êý·ÖÎö

  free_bootmem()Õâ¸öº¯ÊýÊÇϵͳÆô¶¯³õÆÚÄÚ´æÊͷŵĺËÐĺ¯Êý£¬ÎÒÃÇÀ´¿´¿´ËüµÄ´úÂë¡£
  void __init free_bootmem (unsigned long addr, unsigned long size)//addrÊÇÒªÊͷŵÄÎïÀíÆðʼµØÖ·£¬sizeÊÇÒªÊͷſռäµÄ´óС¡£
 {
    free_bootmem_core(NODE_DATA(0)->bdata, addr, size);//Ö±½ ......

linuxѹËõºÍ½âѹËõÃüÁî´óÈ«


linuxѹËõºÍ½âѹËõÃüÁî´óÈ«

        .tar
¡¡¡¡½â°ü£ºtar zxvf FileName.tar
¡¡¡¡´ò°ü£ºtar czvf FileName.tar DirName
¡¡¡¡---------------------------------------------
¡¡¡¡.gz
¡¡¡¡½âѹ1£ºgunzip FileName.gz
¡¡¡¡½âѹ2£ºgzip -d FileName.gz
¡¡¡¡Ñ¹Ëõ£ºgzip File ......

Linuxϲ鿴ÎļþºÍÎļþ¼Ð´óСµÄdfºÍduÃüÁî

µ±´ÅÅÌ´óС³¬¹ý±ê׼ʱ»áÓб¨¾¯Ìáʾ£¬ÕâʱÈç¹ûÕÆÎÕdfºÍduÃüÁîÊǷdz£Ã÷ÖǵÄÑ¡Ôñ¡£
    df¿ÉÒԲ鿴һ¼¶Îļþ¼Ð´óС¡¢Ê¹ÓñÈÀý¡¢µµ°¸ÏµÍ³¼°Æä¹ÒÈëµã£¬µ«¶ÔÎļþÈ´ÎÞÄÜΪÁ¦¡£
    du¿ÉÒԲ鿴Îļþ¼°Îļþ¼ÐµÄ´óС¡£
    Á½ÕßÅäºÏʹÓ㬷dz£ÓÐЧ¡£±ÈÈçÓÃdf²é¿´ÄĸöÒ»¼¶Ä¿Â¼¹ý´ó£¬È»º ......

Linux Ï߳̽ӿÚ˵Ã÷

×î½ü¶ÔLinuxµÄÏ߳̽ӿڽøÐÐÁËЩ×ܽᣬҲ²Î¿¼ÁËÍøÂçÉÏÐÖµÜÃǵÄһЩ×ÊÁÏ£¬×Ô¼ºÍ¬Ê±Ò²Ð´ÁËЩ³ÌÐò½øÐвâÊÔ£¬ÏȰѲο¼µÄ
×ÊÁÏÁгöÀ´°É
http://blog.mcuol.com/User/liuzhilii521/Article/12738_1.htm
ÏÂÃæÊÇÎÒµÄһЩÀí½â£º
pthread_key_create(pthread_key_t *key,void (*destructor)(void*))
destructorÕâ¸ö»Øµ÷º¯ÊýÔÚÏß³Ì ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ