Linux ×Ô¼ìºÍ SystemTap
SystemTap ÊÇ¼à¿ØºÍ¸ú×ÙÔËÐÐÖÐµÄ Linux Äں˵IJÙ×÷µÄ¶¯Ì¬·½·¨¡£Õâ¾ä»°µÄ¹Ø¼ü´ÊÊǶ¯Ì¬£¬ÒòΪ SystemTap ûÓÐʹÓù¤¾ß¹¹½¨Ò»¸öÌØÊâµÄÄںˣ¬¶øÊÇÔÊÐíÄúÔÚÔËÐÐʱ¶¯Ì¬µØ°²×°¸Ã¹¤¾ß¡£Ëüͨ¹ýÒ»¸öÃûΪKprobes µÄÓ¦Óñà³Ì½Ó¿Ú£¨API£©À´ÊµÏÖ¸ÃÄ¿µÄ£¬±¾ÎĽ«Ì½Ë÷Õâ¸ö API¡£ÎÒÃÇÊ×ÏÈÁ˽âÒÔǰµÄһЩÄں˸ú×Ù·½·¨£¬È»ºóÔÚÉîÈë̽ÌÖ SystemTap µÄ¼Ü¹¹¼°ÆäʹÓá£
Äں˸ú×Ù
SystemTap ÓëÒ»ÖÖÃûΪ DTrace µÄÀϼ¼ÊõÏàËÆ£¬¸Ã¼¼ÊõÔ´ÓÚ Sun Solaris ²Ù×÷ϵͳ¡£ÔÚ DTrace ÖУ¬¿ª·¢ÈËÔ±¿ÉÒÔÓà D ±à³ÌÓïÑÔ£¨C ÓïÑÔµÄ×Ó¼¯£¬µ«ÐÞ¸ÄΪ֧³Ö¸ú×ÙÐÐΪ£©±àд½Å±¾¡£DTrace ½Å±¾°üº¬Ðí¶à̽ÕëºÍÏà¹ØÁªµÄ²Ù×÷£¬ÕâЩ²Ù×÷ÔÚ̽Õë “´¥·¢” ʱ·¢Éú¡£ÀýÈ磬̽Õë¿ÉÒÔ±íʾ¼òµ¥µÄϵͳµ÷Óã¬Ò²¿ÉÒÔ±íʾ¸ü¼Ó¸´ÔӵĽ»»¥£¬±ÈÈçÖ´ÐÐÌØ¶¨µÄ´úÂëÐС£Çåµ¥ 1 ÏÔʾÁË DTrace ½Å±¾µÄÒ»¸ö¼òµ¥Àý×Ó£¬Ëü¼ÆËãÿ¸ö½ø³Ì·¢³öµÄϵͳµ÷ÓõÄÊýÁ¿£¨×¢Ò⣬ʹÓÃ×ֵ佫¼ÆÊýºÍ½ø³Ì¹ØÁªÆðÀ´£©¡£¸Ã½Å±¾µÄ¸ñʽ°üº¬Ì½Õ루ÔÚ·¢³öϵͳµ÷ÓÃʱ´¥·¢£©ºÍ²Ù×÷£¨¶ÔÓ¦µÄ²Ù×÷½Å±¾£©¡£
Çåµ¥ 1. ¼ÆËãÿ¸ö½ø³ÌµÄϵͳµ÷Óõļòµ¥ DTrace ½Å±¾
syscall:::entry
{
@num[pid,execname] = count();
}
DTrace ÊÇ Solaris ×îÒýÈËעĿµÄ²¿·Ö£¬ËùÒÔÔÚÆäËû²Ù×÷ϵͳÖпª·¢Ëü²¢²»Ææ¹Ö¡£DTrace ÊÇÔÚ Common Development and Distribution License (CDDL) ֮Ϸ¢Ðе쬲¢ÇÒ±»ÒÆÖ²µ½ FreeBSD ²Ù×÷ϵͳÖС£
ÁíÒ»¸ö·Ç³£ÓÐÓõÄÄں˸ú×Ù¹¤¾ßÊÇ ProbeVue£¬ËüÊÇ IBM Ϊ IBM® AIX® ²Ù×÷ϵͳ 6.1 ¿ª·¢µÄ¡£Äú¿ÉÒÔʹÓà ProbeVue ̽²éϵͳµÄÐÐΪºÍÐÔÄÜ£¬ÒÔ¼°Ìá¹©ÌØ¶¨½ø³ÌµÄÏêϸÐÅÏ¢¡£Õâ¸ö¹¤¾ßʹÓÃÒ»¸ö±ê×¼µÄÄÚºËÒÔ¶¯Ì¬µÄ·½Ê½½øÐиú×Ù¡£Çåµ¥ 2 ÏÔʾÁË ProbeVue ½Å±¾µÄÒ»¸öÀý×Ó£¬ËüÖ¸³ö·¢³ö sync ϵͳµ÷ÓõÄÌØ¶¨½ø³Ì¡£
Çåµ¥ 2. Ö¸³öÄĸö½ø³Ìµ÷Óà sync µÄ¼òµ¥ ProbeVue ½Å±¾
@@syscall:*:sync:entry
{
printf( "sync() syscall invoked
Ïà¹ØÎĵµ£º
¡¡¡¡REDHAT
´´½¨ÓÚ1993Ä꣬ÊÇ
Ä¿ÊÀ½çÉÏ×î×ÊÉîµÄLinuxºÍ¿ª·ÅÔ´´úÂëÌṩÉÌ£¬Í¬Ê±Ò²ÊÇ×î»ñÈϿɵÄLinux
Æ·ÅÆ¡£»ùÓÚ¿ª·ÅÔ´´úÂëģʽ£¬ºìñΪȫÇòÆóÒµÌṩרҵ¼¼ÊõºÍ·þÎñ¡£ºìñµÄ½â¾ö
·½°¸°üÀ¨ºìñÆóÒµLinux²Ù×÷ƽ̨£¬ÒÔ¼°ÆäËûÄÚÈݹ㷺µÄ·þÎñ£¬Èç:×Éѯ£¬24X7¼¼ÊõÖ§³ÖºÍºìÃ±ÍøÂç(RHN)¡£ºìñÒÔ¶©ÔĵÄÉÌҵģʽÏòÓû§Ìṩ²»¼ä¶Ï
µ ......
1
¸ùÎļþϵͳ
¼òµ¥À´Ëµ£¬£¨¸ùÎļþϵͳ£©¾ÍÊÇϵͳµÚÒ»¸ö
mount
µÄÎļþϵͳ
Filesystem
Handling
Like
every
traditional
Unix
system,
Linux
makes
use
of
a
system ......
linuxÉϵö·Å¿ÉÖ´ÐÐÎļþµÄĿ¼ÓÐʲô²»Í¬£¿
/bin: programs used in booting the system
/usr/bin:   ......
˵Ã÷£ºÏëÔÚwindowsÉÏ´ò¿ªÊ¹ÓÃÔ¶³Ìlinux×ÀÃæ¡£·½·¨Ò²ºÜ¶à¡£
1.vnc¡£Õâ¸öÔÚlinux¶ËÐèÒª°²×°³ÌÐò£¬ÐèÒªÔÚlinuxÉÏÔËÐÐÏàÓ¦µÄ³ÌÐò£¬²ÅÄÜʹwindowsÁ¬½ÓÉÏÈ¥¡£²»Ì«·½±ã¡£
2.xmanager.Ö»ÒªÐÞ¸ÄÒ»ÏÂlinuxÀïµÄ¼¸¸öÎļþÉèÖþͿÉÒÔʹÓᣣ¨ÓëwindowsµÄÔ¶³Ì×ÀÃæÒ»Ñù£¬Ö»ÐèÒª¹´ÉÏÔ¶³Ì×ÀÃæÑ¡Ï
linuxÉÏÉèÖÃÏîÄ¿£º
1¡£ÐÞ¸Ä/etc/X11/xd ......
Ìî¿Õ²¿·Ö
1
ÔÚlinux
ϵͳÖУ¬ÒÔÎļþ
µÄ·½Ê½·ÃÎÊÉ豸¡£
2 linux
ÄÚºËÒýµ¼Ê±£¬Í¨¹ý/etc/fstab
Îļþ¶ÁȡҪ¼ÓÔØµÄÎļþϵͳ
3 linux
ÎļþϵͳÖпÉÒÔÓÐÁ½ÖÖ·½Ê½±êʶÎļþÀàÐÍ£¬µÚÒ» ÖÖʹÓÃÑÕÉ«
À´±êʶ£¬°×É«±íʾһ°ãÐÔµÄÎļþ£¬ÈçÎı¾Îļþ¡¢ÅäÖÃÎļþ¡¢Ô´´úÂëÎļþµÈ£»Ç³ À¶É«µÄ±íʾÁ¬½ÓÎļþ£¬Ö»ÒªÊÇʹÓÃln
ÃüÁÁ¢µÄÎ ......