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Code Issues Releases Wiki Activity

scftorture: Count reschedule IPIs 

Currently, only those IPIs that invoke scftorture's scf_handler()
IPI handler function are counted.  This means that runs exercising
only scftorture.weight_resched will look like they have made no forward
progress, resulting in "GP HANG" complaints from the rcutorture scripting.
This commit therefore increments the scf_invoked_count per-CPU counter
immediately after calling resched_cpu().

Fixes: 1ac78b49d6 ("scftorture: Add an alternative IPI vector")
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2021-07-14 06:53:51 -07:00
parent da9366c627
commit c3d0258d5a
1 changed files with 1 additions and 0 deletions
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kernel/scftorture.c
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@ -341,6 +341,7 @@ static void scftorture_invoke_one(struct scf_statistics *scfp, struct torture_ra
cpu = torture_random(trsp) % nr_cpu_ids;
scfp->n_resched++;
resched_cpu(cpu);
this_cpu_inc(scf_invoked_count);
}
break;
case SCF_PRIM_SINGLE: