rcutorture.c File Reference

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kthread.h>
#include <linux/err.h>
#include <linux/spinlock.h>
#include <linux/smp.h>
#include <linux/rcupdate.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/atomic.h>
#include <linux/bitops.h>
#include <linux/completion.h>
#include <linux/moduleparam.h>
#include <linux/percpu.h>
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/freezer.h>
#include <linux/cpu.h>
#include <linux/delay.h>
#include <linux/stat.h>
#include <linux/srcu.h>
#include <linux/slab.h>
#include <asm/byteorder.h>

Go to the source code of this file.

Data Structures
struct	rcu_torture
struct	rcu_random_state
struct	rcu_torture_ops
struct	rcu_boost_inflight

Macros
#define	TORTURE_FLAG   "-torture:"
#define	PRINTK_STRING(s)   do { pr_alert("%s" TORTURE_FLAG s "\n", torture_type); } while (0)
#define	VERBOSE_PRINTK_STRING(s)   do { if (verbose) pr_alert("%s" TORTURE_FLAG s "\n", torture_type); } while (0)
#define	VERBOSE_PRINTK_ERRSTRING(s)   do { if (verbose) pr_alert("%s" TORTURE_FLAG "!!! " s "\n", torture_type); } while (0)
#define	RCU_TORTURE_PIPE_LEN   10
#define	RCUTORTURE_RUNNABLE_INIT   0
#define	rcu_can_boost()   0
#define	FULLSTOP_DONTSTOP   0 /* Normal operation. */
#define	FULLSTOP_SHUTDOWN   1 /* System shutdown with rcutorture running. */
#define	FULLSTOP_RMMOD   2 /* Normal rmmod of rcutorture. */
#define	RCU_RANDOM_MULT   39916801 /* prime */
#define	RCU_RANDOM_ADD   479001701 /* prime */
#define	RCU_RANDOM_REFRESH   10000
#define	DEFINE_RCU_RANDOM(name)   struct rcu_random_state name = { 0, 0 }

Functions
	MODULE_LICENSE ("GPL")
	MODULE_AUTHOR ("Paul E. McKenney <[email protected]> and Josh Triplett <[email protected]>")
	module_param (nreaders, int, 0444)
	MODULE_PARM_DESC (nreaders,"Number of RCU reader threads")
	module_param (nfakewriters, int, 0444)
	MODULE_PARM_DESC (nfakewriters,"Number of RCU fake writer threads")
	module_param (stat_interval, int, 0644)
	MODULE_PARM_DESC (stat_interval,"Number of seconds between stats printk()s")
	module_param (verbose, bool, 0444)
	MODULE_PARM_DESC (verbose,"Enable verbose debugging printk()s")
	module_param (test_no_idle_hz, bool, 0444)
	MODULE_PARM_DESC (test_no_idle_hz,"Test support for tickless idle CPUs")
	module_param (shuffle_interval, int, 0444)
	MODULE_PARM_DESC (shuffle_interval,"Number of seconds between shuffles")
	module_param (stutter, int, 0444)
	MODULE_PARM_DESC (stutter,"Number of seconds to run/halt test")
	module_param (irqreader, int, 0444)
	MODULE_PARM_DESC (irqreader,"Allow RCU readers from irq handlers")
	module_param (fqs_duration, int, 0444)
	MODULE_PARM_DESC (fqs_duration,"Duration of fqs bursts (us)")
	module_param (fqs_holdoff, int, 0444)
	MODULE_PARM_DESC (fqs_holdoff,"Holdoff time within fqs bursts (us)")
	module_param (fqs_stutter, int, 0444)
	MODULE_PARM_DESC (fqs_stutter,"Wait time between fqs bursts (s)")
	module_param (n_barrier_cbs, int, 0444)
	MODULE_PARM_DESC (n_barrier_cbs,"# of callbacks/kthreads for barrier testing")
	module_param (onoff_interval, int, 0444)
	MODULE_PARM_DESC (onoff_interval,"Time between CPU hotplugs (s), 0=disable")
	module_param (onoff_holdoff, int, 0444)
	MODULE_PARM_DESC (onoff_holdoff,"Time after boot before CPU hotplugs (s)")
	module_param (shutdown_secs, int, 0444)
	MODULE_PARM_DESC (shutdown_secs,"Shutdown time (s), zero to disable.")
	module_param (stall_cpu, int, 0444)
	MODULE_PARM_DESC (stall_cpu,"Stall duration (s), zero to disable.")
	module_param (stall_cpu_holdoff, int, 0444)
	MODULE_PARM_DESC (stall_cpu_holdoff,"Time to wait before starting stall (s).")
	module_param (test_boost, int, 0444)
	MODULE_PARM_DESC (test_boost,"Test RCU prio boost: 0=no, 1=maybe, 2=yes.")
	module_param (test_boost_interval, int, 0444)
	MODULE_PARM_DESC (test_boost_interval,"Interval between boost tests, seconds.")
	module_param (test_boost_duration, int, 0444)
	MODULE_PARM_DESC (test_boost_duration,"Duration of each boost test, seconds.")
	module_param (torture_type, charp, 0444)
	MODULE_PARM_DESC (torture_type,"Type of RCU to torture (rcu, rcu_bh, srcu)")
	module_param (rcutorture_runnable, int, 0444)
	MODULE_PARM_DESC (rcutorture_runnable,"Start rcutorture at boot")
	DEFINE_MUTEX (boost_mutex)
void	rcutorture_trace_dump (void)
void	rcu_torture_barrier_cbf (struct rcu_head *rcu)
	module_init (rcu_torture_init)
	module_exit (rcu_torture_cleanup)

Variables
int	rcutorture_runnable = RCUTORTURE_RUNNABLE_INIT

Macro Definition Documentation

#define DEFINE_RCU_RANDOM

(

name

)

struct rcu_random_state name = { 0, 0 }

Definition at line 307 of file rcutorture.c.

#define FULLSTOP_DONTSTOP   0 /* Normal operation. */

Definition at line 222 of file rcutorture.c.

#define FULLSTOP_RMMOD   2 /* Normal rmmod of rcutorture. */

Definition at line 224 of file rcutorture.c.

#define FULLSTOP_SHUTDOWN   1 /* System shutdown with rcutorture running. */

Definition at line 223 of file rcutorture.c.

#define PRINTK_STRING

(

s

)

do { pr_alert("%s" TORTURE_FLAG s "\n", torture_type); } while (0)

Definition at line 122 of file rcutorture.c.

#define rcu_can_boost

(

)

0

Definition at line 207 of file rcutorture.c.

#define RCU_RANDOM_ADD   479001701 /* prime */

Definition at line 304 of file rcutorture.c.

#define RCU_RANDOM_MULT   39916801 /* prime */

Definition at line 303 of file rcutorture.c.

#define RCU_RANDOM_REFRESH   10000

Definition at line 305 of file rcutorture.c.

#define RCU_TORTURE_PIPE_LEN   10

Definition at line 148 of file rcutorture.c.

#define RCUTORTURE_RUNNABLE_INIT   0

Definition at line 198 of file rcutorture.c.

#define TORTURE_FLAG   "-torture:"

Definition at line 121 of file rcutorture.c.

#define VERBOSE_PRINTK_ERRSTRING

(

s

)

do { if (verbose) pr_alert("%s" TORTURE_FLAG "!!! " s "\n", torture_type); } while (0)

Definition at line 126 of file rcutorture.c.

#define VERBOSE_PRINTK_STRING

(

s

)

do { if (verbose) pr_alert("%s" TORTURE_FLAG s "\n", torture_type); } while (0)

Definition at line 124 of file rcutorture.c.

Function Documentation

DEFINE_MUTEX

(

boost_mutex

)

MODULE_AUTHOR

(

"Paul E. McKenney <[email protected]> and Josh Triplett <[email protected]>"

)

module_exit

(

rcu_torture_cleanup

)

module_init

(

rcu_torture_init

)

MODULE_LICENSE

(

"GPL"

)

module_param	(	nreaders	,
		int	,
		0444
	)

module_param	(	nfakewriters	,
		int	,
		0444
	)

module_param	(	stat_interval	,
		int	,
		0644
	)

module_param	(	verbose	,
		bool	,
		0444
	)

module_param	(	test_no_idle_hz	,
		bool	,
		0444
	)

module_param	(	shuffle_interval	,
		int	,
		0444
	)

module_param	(	stutter	,
		int	,
		0444
	)

module_param	(	irqreader	,
		int	,
		0444
	)

module_param	(	fqs_duration	,
		int	,
		0444
	)

module_param	(	fqs_holdoff	,
		int	,
		0444
	)

module_param	(	fqs_stutter	,
		int	,
		0444
	)

module_param	(	n_barrier_cbs	,
		int	,
		0444
	)

module_param	(	onoff_interval	,
		int	,
		0444
	)

module_param	(	onoff_holdoff	,
		int	,
		0444
	)

module_param	(	shutdown_secs	,
		int	,
		0444
	)

module_param	(	stall_cpu	,
		int	,
		0444
	)

module_param	(	stall_cpu_holdoff	,
		int	,
		0444
	)

module_param	(	test_boost	,
		int	,
		0444
	)

module_param	(	test_boost_interval	,
		int	,
		0444
	)

module_param	(	test_boost_duration	,
		int	,
		0444
	)

module_param	(	torture_type	,
		charp	,
		0444
	)

module_param	(	rcutorture_runnable	,
		int	,
		0444
	)

MODULE_PARM_DESC	(	nreaders	,
		"Number of RCU reader threads"
	)

MODULE_PARM_DESC	(	nfakewriters	,
		"Number of RCU fake writer threads"
	)

MODULE_PARM_DESC	(	stat_interval	,
		"Number of seconds between stats printk()s"
	)

MODULE_PARM_DESC	(	verbose	,
		"Enable verbose debugging printk()s"
	)

MODULE_PARM_DESC	(	test_no_idle_hz	,
		"Test support for tickless idle CPUs"
	)

MODULE_PARM_DESC	(	shuffle_interval	,
		"Number of seconds between shuffles"
	)

MODULE_PARM_DESC	(	stutter	,
		"Number of seconds to run/halt test"
	)

MODULE_PARM_DESC	(	irqreader	,
		"Allow RCU readers from irq handlers"
	)

MODULE_PARM_DESC	(	fqs_duration	,
		"Duration of fqs bursts (us)"
	)

MODULE_PARM_DESC	(	fqs_holdoff	,
		"Holdoff time within fqs bursts (us)"
	)

MODULE_PARM_DESC	(	fqs_stutter	,
		"Wait time between fqs bursts (s)"
	)

MODULE_PARM_DESC	(	n_barrier_cbs	,
		"# of callbacks/kthreads for barrier testing"
	)

MODULE_PARM_DESC	(	onoff_interval	,
		"Time between CPU hotplugs	s
	)

MODULE_PARM_DESC	(	onoff_holdoff	,
		"Time after boot before CPU hotplugs (s)"
	)

MODULE_PARM_DESC	(	shutdown_secs	,
		"Shutdown time	s,
		zero to disable."
	)

MODULE_PARM_DESC	(	stall_cpu	,
		"Stall duration	s,
		zero to disable."
	)

MODULE_PARM_DESC	(	stall_cpu_holdoff	,
		"Time to wait before starting stall (s)."
	)

MODULE_PARM_DESC	(	test_boost	,
		"Test RCU prio boost:	0 = no,
		1	= maybe
	)

MODULE_PARM_DESC	(	test_boost_interval	,
		"Interval between boost	tests,
		seconds."
	)

MODULE_PARM_DESC	(	test_boost_duration	,
		"Duration of each boost	test,
		seconds."
	)

MODULE_PARM_DESC	(	torture_type	,
		"Type of RCU to torture (rcu, rcu_bh, srcu)"
	)

MODULE_PARM_DESC	(	rcutorture_runnable	,
		"Start rcutorture at boot"
	)

void rcu_torture_barrier_cbf

(

struct rcu_head *

rcu

)

Definition at line 1671 of file rcutorture.c.

void rcutorture_trace_dump

(

void

)

Definition at line 1050 of file rcutorture.c.

Variable Documentation

int rcutorture_runnable = RCUTORTURE_RUNNABLE_INIT

Definition at line 200 of file rcutorture.c.