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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: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2020-06-30 16:13:37 -07:00
parent bca37119c5
commit dba3142b37
1 changed files with 18 additions and 4 deletions
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22
kernel/scftorture.c
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@ -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");