From 7364e86547bc52a555c9317b32cc4e81c4d4fd7c Mon Sep 17 00:00:00 2001 From: Wang Long Date: Wed, 10 Jun 2015 08:11:13 +0000 Subject: ring-buffer-benchmark: Fix the wrong param in module_param The {producer|consumer}_{nice|fifo} parameters are integer type, we should use 'int' as the second param in module_param. For example(consumer_fifo): the default value of consumer_fifo is -1. Without this patch: # cat /sys/module/ring_buffer_benchmark/parameters/consumer_fifo 4294967295 With this patch: # cat /sys/module/ring_buffer_benchmark/parameters/consumer_fifo -1 Link: http://lkml.kernel.org/r/1433923873-67712-1-git-send-email-long.wanglong@huawei.com Signed-off-by: Wang Long Signed-off-by: Steven Rostedt --- kernel/trace/ring_buffer_benchmark.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'kernel/trace/ring_buffer_benchmark.c') diff --git a/kernel/trace/ring_buffer_benchmark.c b/kernel/trace/ring_buffer_benchmark.c index 13d945c0d03f..cdff7d3df902 100644 --- a/kernel/trace/ring_buffer_benchmark.c +++ b/kernel/trace/ring_buffer_benchmark.c @@ -46,16 +46,16 @@ static int consumer_nice = MAX_NICE; static int producer_fifo = -1; static int consumer_fifo = -1; -module_param(producer_nice, uint, 0644); +module_param(producer_nice, int, 0644); MODULE_PARM_DESC(producer_nice, "nice prio for producer"); -module_param(consumer_nice, uint, 0644); +module_param(consumer_nice, int, 0644); MODULE_PARM_DESC(consumer_nice, "nice prio for consumer"); -module_param(producer_fifo, uint, 0644); +module_param(producer_fifo, int, 0644); MODULE_PARM_DESC(producer_fifo, "fifo prio for producer"); -module_param(consumer_fifo, uint, 0644); +module_param(consumer_fifo, int, 0644); MODULE_PARM_DESC(consumer_fifo, "fifo prio for consumer"); static int read_events; -- cgit v1.2.3 From 33d657d1381025542b84b79d5c7b548598e40a4d Mon Sep 17 00:00:00 2001 From: Wang Long Date: Wed, 10 Jun 2015 08:12:07 +0000 Subject: ring-buffer-benchmark: Fix the wrong type The macro 'module_param' shows that the type of the variable disable_reader and write_iteration is unsigned integer. so, we change their type form int to unsigned int. Link: http://lkml.kernel.org/r/1433923927-67782-1-git-send-email-long.wanglong@huawei.com Signed-off-by: Wang Long Signed-off-by: Steven Rostedt --- kernel/trace/ring_buffer_benchmark.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'kernel/trace/ring_buffer_benchmark.c') diff --git a/kernel/trace/ring_buffer_benchmark.c b/kernel/trace/ring_buffer_benchmark.c index cdff7d3df902..2430563cf2bc 100644 --- a/kernel/trace/ring_buffer_benchmark.c +++ b/kernel/trace/ring_buffer_benchmark.c @@ -32,11 +32,11 @@ static struct task_struct *producer; static struct task_struct *consumer; static unsigned long read; -static int disable_reader; +static unsigned int disable_reader; module_param(disable_reader, uint, 0644); MODULE_PARM_DESC(disable_reader, "only run producer"); -static int write_iteration = 50; +static unsigned int write_iteration = 50; module_param(write_iteration, uint, 0644); MODULE_PARM_DESC(write_iteration, "# of writes between timestamp readings"); -- cgit v1.2.3 From b44754d8262d3aab842998cf747f44fe6090be9f Mon Sep 17 00:00:00 2001 From: Petr Mladek Date: Mon, 15 Jun 2015 15:53:10 +0200 Subject: ring_buffer: Allow to exit the ring buffer benchmark immediately It takes a while until the ring_buffer_benchmark module is removed when the ring buffer hammer is running. It is because it takes few seconds and kthread_should_stop() is not being checked. This patch adds the check for kthread termination into the producer. It uses the existing @kill_test flag to finish the kthreads as cleanly as possible. It disables printing the "ERROR" message when the kthread is going. It makes sure that producer does not go into the 10sec sleep when it is being killed. Finally, it does not call wait_to_die() when kthread_should_stop() already returns true. Link: http://lkml.kernel.org/r/20150615155428.GD3135@pathway.suse.cz Signed-off-by: Petr Mladek Signed-off-by: Steven Rostedt --- kernel/trace/ring_buffer_benchmark.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) (limited to 'kernel/trace/ring_buffer_benchmark.c') diff --git a/kernel/trace/ring_buffer_benchmark.c b/kernel/trace/ring_buffer_benchmark.c index 2430563cf2bc..5ffbae3d3f86 100644 --- a/kernel/trace/ring_buffer_benchmark.c +++ b/kernel/trace/ring_buffer_benchmark.c @@ -263,6 +263,8 @@ static void ring_buffer_producer(void) if (cnt % wakeup_interval) cond_resched(); #endif + if (kthread_should_stop()) + kill_test = 1; } while (ktime_before(end_time, timeout) && !kill_test); trace_printk("End ring buffer hammer\n"); @@ -285,7 +287,7 @@ static void ring_buffer_producer(void) entries = ring_buffer_entries(buffer); overruns = ring_buffer_overruns(buffer); - if (kill_test) + if (kill_test && !kthread_should_stop()) trace_printk("ERROR!\n"); if (!disable_reader) { @@ -379,7 +381,7 @@ static int ring_buffer_consumer_thread(void *arg) } __set_current_state(TASK_RUNNING); - if (kill_test) + if (!kthread_should_stop()) wait_to_die(); return 0; @@ -399,13 +401,16 @@ static int ring_buffer_producer_thread(void *arg) } ring_buffer_producer(); + if (kill_test) + goto out_kill; trace_printk("Sleeping for 10 secs\n"); set_current_state(TASK_INTERRUPTIBLE); schedule_timeout(HZ * SLEEP_TIME); } - if (kill_test) +out_kill: + if (!kthread_should_stop()) wait_to_die(); return 0; -- cgit v1.2.3