refperf: Convert nreaders to a module parameter (8fc28783) · Commits · 戴 / test

kernel/rcu/refperf.c

+11 −5

Original line number	Diff line number	Diff line
		@@ -62,6 +62,12 @@ torture_param(int, holdoff, IS_BUILTIN(CONFIG_RCU_REF_PERF_TEST) ? 10 : 0,
		"Holdoff time before test start (s)");
		// Number of loops per experiment, all readers execute operations concurrently.
		torture_param(long, loops, 10000000, "Number of loops per experiment.");
		// Number of readers, with -1 defaulting to about 75% of the CPUs.
		torture_param(int, nreaders, -1, "Number of readers, -1 for 75% of CPUs.");
		// Number of runs.
		torture_param(int, nruns, 30, "Number of experiments to run.");
		// Reader delay in nanoseconds, 0 for no delay.
		torture_param(int, readdelay, 0, "Read-side delay in nanoseconds.");

		#ifdef MODULE
		# define REFPERF_SHUTDOWN 0
		@@ -93,7 +99,6 @@ static wait_queue_head_t main_wq;
		static int shutdown_start;

		static struct reader_task *reader_tasks;
		static int nreaders;

		// Number of readers that are part of the current experiment.
		static atomic_t nreaders_exp;
		@@ -411,8 +416,8 @@ static void
		ref_perf_print_module_parms(struct ref_perf_ops cur_ops, const char tag)
		{
		pr_alert("%s" PERF_FLAG
		"--- %s: verbose=%d shutdown=%d holdoff=%d loops=%ld\n", perf_type, tag,
		verbose, shutdown, holdoff, loops);
		"--- %s: verbose=%d shutdown=%d holdoff=%d loops=%ld nreaders=%d\n", perf_type, tag,
		verbose, shutdown, holdoff, loops, nreaders);
		}

		static void
		@@ -501,7 +506,8 @@ ref_perf_init(void)
		schedule_timeout_uninterruptible(1);
		}

		// Reader tasks (~75% of online CPUs).
		// Reader tasks (default to ~75% of online CPUs).
		if (nreaders < 0)
		nreaders = (num_online_cpus() >> 1) + (num_online_cpus() >> 2);
		reader_tasks = kcalloc(nreaders, sizeof(reader_tasks[0]),
		GFP_KERNEL);

Admin message