[SOLVED] regarding cpu time

himu3118 · 06-02-2010, 07:40 AM

i want to find the cpu time taken by an executable to run.. the executable is writting the output to a file. i want to write the time takem by cpu to the same output file.

like:
./abc < input > output

abc is my executable which is taking input as input file and writing the result in output file.. i want to append cpu time information in the same file.

how can i do this..
can i do it with time command??

AlucardZero · 06-02-2010, 08:17 AM

Quote:

can i do it with time command??

yes

himu3118 · 06-02-2010, 08:43 AM

but how?? wid time??

AlucardZero · 06-02-2010, 09:29 AM

Hm, I didn't read your question closely enough or I would have been more helpful.
look at time's -o and -a options.

himu3118 · 06-02-2010, 09:35 AM

i have checked those options but its not appending in the same output file..

crts · 06-02-2010, 04:52 PM

Quote:

Originally Posted by himu3118

i have checked those options but its not appending in the same output file..

Hi,

this works on my system

Code:

/usr/bin/time -a -o output ./script.sh < input > output

Make sure to give the full path for time. Otherwise bash will use a shell-builtin and this does not understand the -a and -o option.
Hope this helps.