Chinese translated version of Documentation/basic_profiling
If you have any comment or update to the content, please post to LKML directly.
However, if you have problem communicating in English you can also ask the
Chinese maintainer for help. Contact the Chinese maintainer, if this
translation is outdated or there is problem with translation.
Chinese maintainer: Liang Xie xieliang@xiaomi.com
Documentation/basic_profilingçä¸æç¿»è¯
妿æ³è¯è®ºææ´æ°æ¬æçå
容ï¼è¯·ç´æ¥åä¿¡å°LKMLãå¦æä½ ä½¿ç¨è±æäº¤æµæå°é¾çè¯ï¼ä¹å¯
以å䏿çç»´æ¤è
æ±å©ã妿æ¬ç¿»è¯æ´æ°ä¸åæ¶æè
ç¿»è¯åå¨é®é¢ï¼è¯·èç³»ä¸æçç»´æ¤è
ã
䏿çç»´æ¤è
ï¼ è°¢è¯ Liang Xie xieliang007@gmail.com
䏿çç¿»è¯è
ï¼ è°¢è¯ Liang Xie xieliang007@gmail.com
ä¸æçæ ¡è¯è
ï¼
以ä¸ä¸ºæ£æ
ä¸é¢è¿äºè¯´ææä»¤é½æ¯é常åºç¡çï¼å¦æä½ æ³è¿ä¸æ¥äºè§£è¯·é
读ç¸å
³ä¸ä¸ææ¡£ï¼ï¼
请ä¸è¦å卿¬ææ¡£å¢å æ°çå
容ï¼ä½å¯ä»¥ä¿®å¤ææ¡£ä¸çé误ï¼ï¼(mbligh@aracnet.com)
æè°¢John Levonï¼Dave Hansenç卿°åæ¶ç帮å©
请å
ç¡®ä¿æ¨å·²ç»ææ£ç¡®çSystem.map / vmlinuxé
ç½®ï¼
对äºlinuxç³»ç»æ¥è¯´ï¼é
ç½®vmlinuzæå®¹æçæ¹æ³å¯è½å°±æ¯ä½¿ç¨âmake installâï¼ç¶åä¿®æ¹
/sbin/installkernelå°vmlinuxæ·è´å°/bootç®å½ï¼èSystem.mapé常æ¯é»è®¤å®è£
好ç
Readprofile
2.6ç³»åå æ ¸éè¦çæ¬ç¸å¯¹è¾æ°çreadprofileï¼æ¯å¦util-linux 2.12aä¸å å«çï¼å¯ä»¥ä»:
http://www.kernel.org/pub/linux/utils/util-linux/ ä¸è½½
大é¨ålinuxåè¡çå·²ç»å å«äº.
å¯ç¨readprofileéè¦å¨kernelå¯å¨å½ä»¤è¡å¢å âprofile=2â
clear readprofile -r
dump output readprofile -m /boot/System.map > captured_profile
Oprofile
ä»http://oprofile.sourceforge.net/è·åæºä»£ç ï¼è¯·åèChanges以è·åå¹é
ççæ¬ï¼
å¨kernelå¯å¨å½ä»¤è¡å¢å âidle=pollâ
é ç½®CONFIG_PROFILING=yåCONFIG_OPROFILE=yç¶åéå¯è¿å ¥æ°kernel
./configure –with-kernel-support
make install
æ³å¾å°å¥½çæµéç»æï¼è¯·ç¡®ä¿å¯ç¨äºæ¬å°APICç¹æ§ã妿opreportæ¾ç¤ºæ0Hz CPUï¼
说æAPICç¹æ§æ²¡æå¼å¯ãå¦å¤æ³¨æidle=pollé项å¯è½æææ§è½ã
One time setup:
opcontrol –setup –vmlinux=/boot/vmlinux
clear opcontrol –reset
start opcontrol –start
stop opcontrol –stop
dump output opreport > output_file
妿åªçkernelç¸å ³çæ¥åç»æï¼è¯·è¿è¡å½ä»¤ opreport -l /boot/vmlinux > output_file
éè¿reseté项å¯ä»¥æ¸ çè¿æç»è®¡æ°æ®ï¼ç¸å½äºéå¯çææã