Linuxѧϰ ѰÕÒ³ÌÐòÈȵ㣨һ£©£ºgprof
gprof½éÉÜ
gprofÊÇGNU profiler¹¤¾ß£¬´æÔÚÓÚbinutils¹¤¾ß°ü¡£¿ÉÒÔÏÔʾ³ÌÐòÔËÐеēflat profile”£¬°üÀ¨Ã¿¸öº¯ÊýµÄµ÷ÓôÎÊý£¬Ã¿¸öº¯ÊýÏûºÄµÄ´¦ÀíÆ÷ʱ¼ä¡£Ò²¿ÉÒÔÏÔʾ“µ÷ÓÃͼ”£¬°üÀ¨º¯ÊýµÄµ÷ÓùØÏµ£¬Ã¿¸öº¯Êýµ÷Óû¨·ÑÁ˶àÉÙʱ¼ä¡£»¹¿ÉÒÔÏÔʾ“×¢Ê͵ÄÔ´´úÂ딣¬ÊdzÌÐòÔ´´úÂëµÄÒ»¸ö¸´±¾£¬±ê¼ÇÓгÌÐòÖÐÿÐдúÂëµÄÖ´ÐдÎÊý¡£
gprof ʵÏÖÔÀí£º
gprof²¢²»ÉñÆæ£¬ÔÚ±àÒëºÍÁ´½Ó³ÌÐòµÄʱ ºò£¨Ê¹Óà -pg ±àÒëºÍÁ´½ÓÑ¡Ï£¬gcc ÔÚÄãÓ¦ÓóÌÐòµÄÿ¸öº¯ÊýÖж¼¼ÓÈëÁËÒ»¸öÃûΪmcount£¨or“_mcount”, or“__mcount”£©µÄº¯Êý£¬Ò²¾ÍÊÇ˵-pg±àÒëµÄÓ¦ÓóÌÐòÀïµÄÿһ¸öº¯Êý¶¼»áµ÷ÓÃmcount, ¶ømcount»áÔÚÄÚ´æÖб£´æÒ»Õź¯Êýµ÷ÓÃͼ£¬²¢Í¨¹ýº¯Êýµ÷ÓöÑÕ»µÄÐÎʽ²éÕÒ×Óº¯ÊýºÍ¸¸º¯ÊýµÄµØÖ·¡£ÕâÕŵ÷ÓÃͼҲ±£´æÁËËùÓÐÓ뺯ÊýÏà¹ØµÄµ÷ÓÃʱ¼ä£¬µ÷ÓôÎÊýµÈµÈµÄËùÓÐÐÅÏ¢¡£
GPROFµÄ»ù±¾Ê¹Ó÷½·¨ÈçÏ£º
1£®Ê¹ÓÃGCC¼ÓÉÏ-pgÑ¡Ïî±àÒë³ÌÐò
2£®Ö´ÐгÌÐò£¬»áÉú³Égmon.out
3£®Ê¹ÓÃgprof·ÖÎögmon.outÎļþ£¬µÃ³öͳ¼Æ×ÊÁÏ
4£®GPROF²»Ö§³Ö¶¯Ì¬Á´½Ó¿âºÍ¶àÏß³Ì
·¶Àý£º
#include<stdio.h>
void funca()
{
int i = 0;
int n = 0;
for(i = 0;i < 10000000;i++)
{
n++;
n--;
}
}
void funcb()
{
int i = 0;
int n = 0;
for(i = 0;i < 10000000;i++)
{
n++;
n--;
}
}
int main(int argc,char *argv[])
{
int i = 0;
for(i = 0;i < 10;i++)
{
funca();
}
funcb();
return 0;
}
±àÒ룺
$ gcc hello.c -pg -o hello
ÔËÐУº
$ ./hello
Éú³Égmon.outÎʼþ
ʹÓÃgprof½øÐнâÎö£º
$ gprof hello gmon.out -p
Flat profile:
Each sample counts as 0.01 seconds.
%
Ïà¹ØÎĵµ£º
£¨L2CAPÐÒé¼ò½é£¬L2CAPÔÚBlueZÖеÄʵÏÖÒÔ¼°L2CAP±à³Ì½Ó¿Ú£©
Ò»£ºL2CAPÐÒé¼ò½é£º
Logical Link Control and Adaptation Protocol(L2CAP)
Âß¼Á¬½Ó¿ØÖƺÍÊÊÅäÐÒé (L2CAP) ΪÉϲãÐÒéÌá¹©ÃæÏòÁ¬½ÓºÍÎÞÁ¬½ÓµÄÊý¾Ý·þÎñ£¬²¢Ìṩ¶àÐÒ鹦ÄܺͷָîÖØ×é²Ù×÷¡£L2CAP ³äÐíÉϲãÐÒéºÍÓ¦ÓÃÈí¼þ´«ÊäºÍ½ÓÊÕ×î´ó³¤¶ÈΪ 64K µÄ L2CAP Ê ......
ÀýÒ»£º·¢ËÍSignaling Packet£º
Signaling CommandÊÇ2¸öBluetoothʵÌåÖ®¼äµÄL2CAP²ãÃüÁî´«Êä¡£ËùÒÔµÃSignaling CommandʹÓÃCID 0x0001.
¶à¸öCommand¿ÉÒÔÔÚÒ»¸öC-frame£¨control frame£©Öз¢ËÍ¡£
Èç¹ûÒªÖ±½Ó·¢ËÍSignaling Command.ÐèÒª½¨Á¢SOCK_RAWÀàÐ͵ÄL2CAPÁ¬½ÓSocket¡£ÕâÑù²ÅÓлú»á×Ô¼ºÌî³äCommand Code£¬Identi ......
×ʼʱ£¬ramоƬÖаüº¬µÄÊÇËæ»úÊý¾Ý¡£µ±¿ªÊ¼Æô¶¯Ê±£¬cpuµÄÒ»¸öÒý½ÅÉÏ»á²úÉúÒ»¸öresetÂß¼Öµ¡£´Ëºó´¦ÀíÆ÷µÄһЩ¼Ä´æÆ÷ÉèÖóɹ̶¨µÄÊýÖµ£¬²¢Ö´ÐÐÔÚÎïÀíµØÖ·0xfffffff0´¦ÕÒµ½µÄ´úÂë¡£Ó²¼þ°ÑÕâ¸öµØÖ·Ó³É䵽ij¸öÖ»¶Á¡¢³Ö¾ÃµÄ´æ´¢Ð¾Æ¬ÖУ¬¸ÃоƬͨ³£³ÆÎªrom(read-only memoryÖ»¶ÁÄÚ´æ)¡£romËù´æ·ÅµÄ³ÌÐò¼¯ÔÚ80x86ÌåϵÖÐͨ³£½Ð×ö ......
1¡¢Ê×ÏÈ´Óhttp://qt.nokia.com/downloads ÏÂÔØ“Qt SDK for Linux”£¬°üÀ¨ÁËQT4.6ºÍQT Creator1.3¡£ Download Qt SDK for Linux/X11 32-bit** (353 MB)
2¡¢ÐÞ¸ÄÎļþqt-sdk-linux-x86-opensource-2009.05.binµÄÊôÐÔ£¬ÈÃÆä¿ÉÖ´ÐУº
chmod u+x qt-sdk-linux-x86-opensource-2009.05.bin
3¡¢Ë«»÷qt-sdk-linux- ......
<!--
/* Font Definitions */
@font-face
{font-family:ËÎÌå;
panose-1:2 1 6 0 3 1 1 1 1 1;
mso-font-alt:SimSun;
mso-font-charset:134;
mso-generic-font-family:auto;
mso-font-pitch:variable;
mso-font-signature:3 135135232 16 0 262145 0;}
@font-face
{font-family:"\@ËÎÌå" ......