Commit dba3142b authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

scftorture: Summarize per-thread statistics 



This commit summarizes the per-thread statistics, providing counts of
the number of single, many, and all calls, both no-wait and wait, and,
for the single case, the number where the target CPU was offline.

Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent bca37119

kernel/scftorture.c

+18 −4
Original line number Diff line number Diff line
@@ -128,13 +128,27 @@ DEFINE_TORTURE_RANDOM_PERCPU(scf_torture_rand); 
static void scf_torture_stats_print(void)

{

	int cpu;

	int i;

	long long invoked_count = 0;

	bool isdone = READ_ONCE(scfdone);

	struct scf_statistics scfs = {};



	for_each_possible_cpu(cpu)

		invoked_count += data_race(per_cpu(scf_invoked_count, cpu));

	pr_alert("%s scf_invoked_count %s: %lld ",

		 SCFTORT_FLAG, isdone ? "VER" : "ver", invoked_count);

	for (i = 0; i < nthreads; i++) {

		scfs.n_single += scf_stats_p[i].n_single;

		scfs.n_single_ofl += scf_stats_p[i].n_single_ofl;

		scfs.n_single_wait += scf_stats_p[i].n_single_wait;

		scfs.n_single_wait_ofl += scf_stats_p[i].n_single_wait_ofl;

		scfs.n_many += scf_stats_p[i].n_many;

		scfs.n_many_wait += scf_stats_p[i].n_many_wait;

		scfs.n_all += scf_stats_p[i].n_all;

		scfs.n_all_wait += scf_stats_p[i].n_all_wait;

	}

	pr_alert("%s scf_invoked_count %s: %lld single: %lld/%lld single_ofl: %lld/%lld many: %lld/%lld all: %lld/%lld ",

		 SCFTORT_FLAG, isdone ? "VER" : "ver", invoked_count,

		 scfs.n_single, scfs.n_single_wait, scfs.n_single_ofl, scfs.n_single_wait_ofl,

		 scfs.n_many, scfs.n_many_wait, scfs.n_all, scfs.n_all_wait);

	torture_onoff_stats();

	pr_cont("\n");

}
@@ -357,11 +371,11 @@ static void scf_torture_cleanup(void) 
			torture_stop_kthread("scftorture_invoker", scf_stats_p[i].task);

	else

		goto end;

	kfree(scf_stats_p);

	scf_stats_p = NULL;

	smp_call_function(scf_cleanup_handler, NULL, 0);

	torture_stop_kthread(scf_torture_stats, scf_torture_stats_task);

	scf_torture_stats_print();  // -After- the stats thread is stopped!

	kfree(scf_stats_p);  // -After- the last stats print has completed!

	scf_stats_p = NULL;



	if (atomic_read(&n_errs))

		scftorture_print_module_parms("End of test: FAILURE");

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