The following commit has been merged into the core/rcu branch of tip: Commit-ID: 83b88c86da0e5f97faeac5a9bb19fe32f8c0394b Gitweb: https://git.kernel.org/tip/83b88c86da0e5f97faeac5a9bb19fe32f8c0394b Author: Paul E. McKenney <[email protected]> AuthorDate: Mon, 25 May 2020 15:31:07 -07:00 Committer: Paul E. McKenney <[email protected]> CommitterDate: Mon, 29 Jun 2020 12:00:44 -07:00
refperf: Allow decimal nanoseconds 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) <[email protected]> Signed-off-by: Paul E. McKenney <[email protected]> --- kernel/rcu/refperf.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/rcu/refperf.c b/kernel/rcu/refperf.c index 57c7b7a..e991d48 100644 --- a/kernel/rcu/refperf.c +++ b/kernel/rcu/refperf.c @@ -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); }
