Hi Mohammad,

Yes, I found and fixed that bug in my local tree. Will push it out later today.

In the meanwhile, please use the -t option (it is compulsory) to take traces on the local machine.

Regards, Amit

On Mon, Jun 2, 2014 at 2:03 PM, Mohammad Merajul Islam Molla meraj.enigma@gmail.com wrote:

Hi

I was trying to run idlestat and with the below command output is -

# sudo ./idlestat -o /tmp/myoutput fopen: No such file or directory

I looked into the source and it looks like its not entering in the if condition in main -

1212 /* Acquisition time specified means we will get the traces */ 1213 if (options.duration || args < argc) { 1214 1215 /* Read cpu topology info from sysfs */ 1216 read_sysfs_cpu_topo();

                     ...

1260 if (idlestat_store(options.filename)) 1261 return -1; }

Since duration argument is not given and args is actually equal to argc, if condition is evaluated false.

So idlestat_store() is not creating the file "/tmp/myoutput" or storing any info there.

As a result, call to idlestat_load is issues above error message.

1264 /* Load the idle states information */ 1265 datas = idlestat_load(options.filename); 1266 if (!datas) 1267 return 1;

I think the fix is simply to change the if condition above and make it -

1212 /* Acquisition time specified means we will get the traces */ 1213 if (options.duration || args <= argc) { 1214 }

-- Thanks, -Meraj