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sorry I am a linux newbie ,
I want to reference the extern variable "jiffies" value updated by kernel
in my programming code , but I found error message at compiled time , I don't know which header files should be included correctly, or maybe some where goes wrong . Can someone teach me how to reference the "jiffies" anywhere in my code !!
help would be greatly appreciated.
Thank you in advance
result = gett();
printf("result is %d\n", result);
printf("jiffies %.3lg \n", jiffies);
puts("puts multi a & b");
INCLUDE = /usr/src/linux/include/
TARGET = test
CC = gcc
SRC = test.c
So if I want to estimate how long a code segment or a single function takes when called , by what manner or functions is recommanded while I can get the estimated time from entring it to leaving it , measured in micro second or even precisely ?