refperf: Dynamically allocate experiment-summary output buffer (f518f154) · Commits · 戴 / test

kernel/rcu/refperf.c

+11 −5

Original line number	Diff line number	Diff line
		@@ -333,9 +333,10 @@ u64 process_durations(int n)
		// point all the timestamps are printed.
		static int main_func(void *arg)
		{
		bool errexit = false;
		int exp, r;
		char buf1[64];
		char buf[512];
		char *buf;
		u64 *result_avg;

		set_cpus_allowed_ptr(current, cpumask_of(nreaders % nr_cpu_ids));
		@@ -343,8 +344,11 @@ static int main_func(void *arg)

		VERBOSE_PERFOUT("main_func task started");
		result_avg = kzalloc(nruns * sizeof(*result_avg), GFP_KERNEL);
		if (!result_avg)
		buf = kzalloc(64 + nruns * 32, GFP_KERNEL);
		if (!result_avg \|\| !buf) {
		VERBOSE_PERFOUT_ERRSTRING("out of memory");
		errexit = true;
		}
		atomic_inc(&n_init);

		// Wait for all threads to start.
		@@ -354,7 +358,7 @@ static int main_func(void *arg)

		// Start exp readers up per experiment
		for (exp = 0; exp < nruns && !torture_must_stop(); exp++) {
		if (!result_avg)
		if (errexit)
		break;
		if (torture_must_stop())
		goto end;
		@@ -391,13 +395,13 @@ static int main_func(void *arg)
		strcat(buf, "Threads\tTime(ns)\n");

		for (exp = 0; exp < nruns; exp++) {
		if (!result_avg)
		if (errexit)
		break;
		sprintf(buf1, "%d\t%llu.%03d\n", exp + 1, result_avg[exp] / 1000, (int)(result_avg[exp] % 1000));
		strcat(buf, buf1);
		}

		if (result_avg)
		if (!errexit)
		PERFOUT("%s", buf);

		// This will shutdown everything including us.
		@@ -412,6 +416,8 @@ static int main_func(void *arg)

		end:
		torture_kthread_stopping("main_func");
		kfree(result_avg);
		kfree(buf);
		return 0;
		}