iostatÀ´¶ÔlinuxÓ²ÅÌIOÐÔÄܽøÐÐÁ˽â
ÒÔÇ°Ò»Ö±²»Ì«»áÓÃÕâ¸ö²ÎÊý¡£ÏÖÔÚÈÏÕæÑо¿ÁËÒ»ÏÂiostat£¬ÒòΪ¸ÕºÃÓÐ̨ÖØÒªµÄ·þÎñÆ÷ѹÁ¦¸ß,ËùÒÔ·ÅÉÏÀ´·ÖÎöÒ»ÏÂ.ÏÂÃæÕą̂¾ÍÊÇIOÓÐѹÁ¦¹ý´ó
µÄ·þÎñÆ÷
$iostat -x 1
Linux 2.6.33-fukai (fukai-laptop) _i686_ (2 CPU)
avg-cpu: %user %nice %system %iowait %steal %idle
5.47 0.50 8.96 48.26 0.00 36.82
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
sda 6.00 273.00 99.00 7.00 2240.00 2240.00 42.26 1.12 10.57 7.96 84.40
sdb 0.00 4.00 0.00 350.00 0.00 2068.00 5.91 0.55 1.58 0.54 18.80
rrqm/s:
ÿÃë½øÐÐ merge µÄ¶Á²Ù×÷ÊýÄ¿¡£¼´ delta(rmerge)/s
wrqm/s:
ÿÃë½øÐÐ merge µÄд²Ù×÷ÊýÄ¿¡£¼´ delta(wmerge)/s
r/s:
ÿÃëÍê³ÉµÄ¶Á I/O É豸´ÎÊý¡£¼´ delta(rio)/s
w/s:
ÿÃëÍê³ÉµÄд I/O É豸´ÎÊý¡£¼´ delta(wio)/s
rsec/s:
ÿÃë¶ÁÉÈÇøÊý¡£¼´ delta(rsect)/s
wsec/s:
ÿÃëдÉÈÇøÊý¡£¼´ delta(wsect)/s
rkB/s:
ÿÃë¶ÁK×Ö½ÚÊý¡£ÊÇ rsect/s µÄÒ»°ë£¬ÒòΪÿÉÈÇø´óСΪ512×Ö½Ú¡£(ÐèÒª¼ÆËã)
wkB/s:
ÿÃëдK×Ö½ÚÊý¡£ÊÇ wsect/s µÄÒ»°ë¡£(ÐèÒª¼ÆËã)
avgrq-sz:
ƽ¾ùÿ´ÎÉ豸I/O²Ù×÷µÄÊý¾Ý´óС
(ÉÈÇø)¡£delta(rsect+wsect)/delta(rio+wio)
avgqu-sz:
ƽ¾ùI/O¶ÓÁг¤¶È¡£¼´ delta(aveq)/s/1000
(ÒòΪaveqµÄµ¥Î»ÎªºÁÃë)¡£
await:
ƽ¾ùÿ´ÎÉ豸I/O²Ù×÷µÄµÈ´ýʱ¼ä (ºÁÃë)¡£¼´
delta(ruse+wuse)/delta(rio+wio)
svctm:
ƽ¾ùÿ´ÎÉ豸I/O²Ù×÷µÄ·þÎñʱ¼ä (ºÁÃë)¡£¼´
delta(use)/delta(rio+wio)
%util:
Ò»ÃëÖÐÓаٷÖÖ®¶àÉÙµÄʱ¼äÓÃÓÚ I/O ²Ù×÷£¬»òÕß˵һÃëÖÐÓжàÉÙʱ¼ä I/O
¶ÓÁÐÊǷǿյġ£¼´ delta(use)/s/1000 (ÒòΪuseµÄµ¥Î»ÎªºÁÃë)
Èç¹û %util ½Ó½ü 100%£¬ËµÃ÷²úÉúµÄI/OÇëÇóÌ«¶à£¬I/OϵͳÒѾÂú¸ººÉ£¬¸Ã´ÅÅÌ
¿ÉÄÜ´æÔÚÆ¿¾±¡£
idleСÓÚ70% IOѹÁ¦¾Í½Ï´óÁË,Ò»°ã¶ÁÈ¡ËÙ¶ÈÓн϶àµÄwait.
ͬʱ¿ÉÒÔ½áºÏvmstat ²é¿´²é¿´b²ÎÊý(µÈ´ý×ÊÔ´
Ïà¹ØÎĵµ£º
2009 Äê 4 ÔÂ 23 ÈÕ
±¾ÎÄÖÐÎÒÃÇÕë¶Ô Linux É϶àÏ̱߳à³ÌµÄÖ÷ÒªÌØÐÔ×ܽá³ö 5 Ìõ¾Ñ飬ÓÃÒÔ¸ÄÉÆ Linux ¶àÏ̱߳à³ÌµÄÏ°¹ßºÍ±ÜÃâÆäÖеĿª·¢ÏÝÚå¡£ÔÚ±¾ÎÄÖУ¬ÎÒÃÇ´©²åһЩ Windows µÄ±à³ÌÓÃÀýÓÃÒÔ¶Ô±È Linux ÌØÐÔ£¬ÒÔ¼ÓÉî¶ÁÕßÓ¡Ïó¡£
±³¾°
Linux ƽ̨ÉϵĶàÏ̳߳ÌÐò¿ª·¢Ïà¶ÔÓ¦ÆäËûƽ̨£¨±ÈÈç Windows£©µÄ¶àÏß³Ì API ÓÐһЩϸ΢ ......
Socket ¾ÍÊÇÌ×½Ó×Ö¡£
Socket ¿ÉÒԺͱ¾µØĿ¼°ó¶¨£¬Ò²¿ÉÒÔºÍÒ»¸öIPµØÖ·°ó¶¨¡£
int socketpair(sa_family, socket_type, protocal, int sz[2]);
sa_family: AF_LOCAL( ºÍ AF_UNIXÒ»Ñù) ±íʾ±¾µØµÄsocket Á¬½Ó
A ......
×÷ÕߣºÐ¡Ò°ÀÇ
-- ·¢²¼Ê±¼ä£º2009-8-31 16:31:10
-- ǶÈëʽLinux»·¾³ÏÂMiniGUIµÄÑо¿ÓëÒÆÖ²
¡¡Ç°ÑÔ
¡¡½üÄêÀ´Ëæ×ÅǶÈëʽÉ豸ÓëÊг¡ÐèÇóµÄ¹ã·º½áºÏ£¬ÊÖ»ú¡¢PDA¡¢DVD²¥·Å»úµÈ²úÆ·µÄÓ¦ÓöԿÉÊÓ»¯²Ù×÷½çÃæµÄ¼ò½àºÍ·½±ãÌá³öÁ˸ü¸ßµÄÒªÇó£¬ÕⶼÐèÒªÒ»¸öÎȶ¨¿É¿¿µÄ¸ßÐÔÄÜGUIϵͳÀ´Ìṩ֧³Ö¡£Í¼ÐÎÓ ......
Ó²¼þƽ̨
¡¡¡¡S3C2410XÊÇÈýÐǹ«Ë¾µÄ»ùÓÚARM920TµÄS3C2410XоƬ¡£S3C2410X¼¯³ÉÁËÒ»¸öLCD¿ØÖÆÆ÷(Ö§³ÖSTNºÍTFT´øÓд¥ÃþÆÁµÄÒº¾§ÏÔʾÆÁ)¡¢SDRAM¡¢´¥ÃþÆÁ¡¢USB¡¢SPI¡¢SDºÍMMCµÈ¿ØÖÆÆ÷£¬4¸ö¾ßÓÐPWM¹¦ÄܵļÆʱÆ÷ºÍ1¸öÄÚ²¿Ê±ÖÓ£¬8ͨµÀµÄ10λADC£¬117λͨÓÃI/O¿ÚºÍ24λÍⲿÖжÏÔ´£¬8ͨµÀ10λAD¿ØÖÆÆ÷£¬´¦ÀíÆ÷¹¤×÷ƵÂÊ×î¸ß´ïµ½203MH ......
LINUX--ÐÞ¸ÄIPµØÖ·
A¡¢ÐÞ¸ÄipµØÖ·
¼´Ê±ÉúЧ:
# ifconfig eth0 192.168.0.20 netmask 255.255.255.0
Æô¶¯ÉúЧ:
ÐÞ¸Ä/etc/sysconfig/network-scripts/ifcfg-eth0
B¡¢ÐÞ¸Ädefault gateway
¼´Ê±ÉúЧ:
# route add default gw 192.168.0.254
Æô¶¯ÉúЧ:
ÐÞ¸Ä/etc/sysconfig/network-scripts/ifcfg-eth0
C¡¢ÐÞ¸Ädns
ÐÞ ......