tests: sched-quota-accuracy: Fix test cpu selection

From: Jan Kiszka <[email protected]>

pick_test_cpu() is adjusting test_cpu to the system's possibilities. That is 0 for a single-core machine, but it can also be something else on multicore machines if the OOB cpuset is restricted. And this causes the test to fail:

sched-quota-accuracy: ** BROKEN
../tests/sched-quota-accuracy.c:96: FAILED: sched_setaffinity(0, sizeof(affinity), &affinity) (=Operation not permitted)

Fixes 245a2eac29eb ("tests: sched-quota-accuracy: extend measurement to preemption noise")

Signed-off-by Jan Kiszka <[email protected]>

---
 tests/sched-quota-accuracy.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

tests/sched-quota-accuracy.c +2 -9

index 2c4daed..2a2dc38 100644
@@ -389,15 +389,6 @@ int main(int argc, char *argv[])
 	}
 
 	atexit((void (*)(void))cleanup_group);
-	set_cpu_affinity();	/* All test threads inherit this. */
-
-	param.sched_priority = MAIN_PRIO;
-	__Tcall_assert(ret, pthread_setschedparam(pthread_self(), SCHED_FIFO, &param));
-	__Tcall_assert(ret, evl_attach_self("quota-accuracy:%d", getpid()));
-
-	__Tcall_assert(ret, evl_new_sem(&ready, "quota-ready:%d", getpid()));
-	__Tcall_assert(ret, evl_new_event(&barrier, "quota-barrier:%d", getpid()));
-	__Tcall_assert(ret, evl_new_mutex(&lock, "quota-lock:%d", getpid()));
 
 	/*
 	 * We need all threads to be pinned on the same (oob-capable)

@@ -407,6 +398,15 @@ int main(int argc, char *argv[])
 	 */
 	test_cpu = pick_test_cpu(test_cpu, false, NULL);
 	do_trace("picked CPU%d for execution", test_cpu);
+	set_cpu_affinity();	/* All test threads inherit this. */
+