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refperf: Allow decimal nanoseconds

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The CONFIG_PREEMPT=n rcu_read_lock()/rcu_read_unlock() pair's overhead,
even including loop overhead, is far less than one nanosecond.
Since logscale plots are not all that happy with zero values, provide
picoseconds as decimals.

Cc: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2020-05-25 15:31:07 -07:00
parent 75dd8efef5
commit 83b88c86da
1 changed files with 2 additions and 2 deletions
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4
kernel/rcu/refperf.c
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@ -375,7 +375,7 @@ static int main_func(void *arg)
if (torture_must_stop())
goto end;
reader_tasks[exp].result_avg = process_durations(exp) / ((exp + 1) * loops);
reader_tasks[exp].result_avg = 1000 * process_durations(exp) / ((exp + 1) * loops);
}
// Print the average of all experiments
@ -386,7 +386,7 @@ static int main_func(void *arg)
strcat(buf, "Threads\tTime(ns)\n");
for (exp = 0; exp < nreaders; exp++) {
sprintf(buf1, "%d\t%llu\n", exp + 1, reader_tasks[exp].result_avg);
sprintf(buf1, "%d\t%llu.%03d\n", exp + 1, reader_tasks[exp].result_avg / 1000, (int)(reader_tasks[exp].result_avg % 1000));
strcat(buf, buf1);
}