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Subject: Re: [LTP] [PATCH] Add ftrace-stress-test to LTP
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To: Garrett Cooper <yanegomi@gmail.com>
Cc: ltp-list@lists.sourceforge.net, Frederic Weisbecker <fweisbec@gmail.com>, Steven Rostedt <rostedt@goodmis.org>, Eugene Teo <eugene@redhat.com>, Ingo Molnar <mingo@elte.hu>, Andrew Morton <akpm@linux-foundation.org>

>> --- /dev/null
>> +++ b/testcases/kernel/tracing/ftrace_stress_test/ftrace_kvercmp.c
>> @@ -0,0 +1,37 @@
>> +#include <unistd.h>
>> +#include <stdlib.h>
>> +#include <stdio.h>
>> +#include <string.h>
>> +#include <sys/utsname.h>
>> +
>> +int main(int argc, char **argv)
>> +{
>> +       struct utsname uval;
>> +       int k1, k2, k3;
>> +       int a1, a2, a3;
>> +       unsigned long r1, r2;
>> +
>> +       if (argc != 4) {
>> +               fprintf(stderr, "Wrong arguments!\n");
>> +               return -1;
>> +       }
>> +
>> +       a1 = strtol(argv[1], NULL, 10);
>> +       a2 = strtol(argv[2], NULL, 10);
>> +       a3 = strtol(argv[3], NULL, 10);
>> +
>> +       uname(&uval);
>> +
>> +       sscanf(uval.release, "%d.%d.%d", &k1, &k2, &k3);
>> +
>> +       r1 = (a1 << 16) + (a2 << 8) + a3;
>> +       r2 = (k1 << 16) + (k2 << 8) + k3;
>> +
>> +       if (r1 > r2)
>> +               return 0;
>> +       else if (r1 == r2)
>> +               return 1;
>> +       else
>> +               return 2;
>> +}
> 
> This application could be replaced with tst_kvercmp out of the box;
> there's no reason why another program needs to be created for this.
> 

This stress test was not written for LTP originally, so I had to write
this ftrace_kvercmp.

But I do have a reason to keep this. That is, using tst_kvercmp will
make it harder to run this test without LTP.

Anyway I'll remove it.

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