rcu_torture_fwd_prog

函数名称：Carry out need_resched()/cond_resched() forward-progress testing.

函数原型：static void rcu_torture_fwd_prog_nr(int *tested, int *tested_tries)

返回类型：void

参数：

类型	参数	名称
int *	tested
int *	tested_tries

1786

bool selfpropcb = false

1788

static

1790

如果call且sync且cb_barrier则

1791

init_rcu_head_on_stack( & rh)

1792

selfpropcb = true

1796

WRITE_ONCE(Short rcu_torture_delay() delays. , true)

1797

sync()

1798

如果selfpropcb则

1799

WRITE_ONCE(stop, 0)

1800

call( & rh, Forward-progress self-propagating RCU callback function. Because* callbacks run from softirq, this function is an implicit RCU read-side* critical section.)

1802

cver等于READ_ONCE(rcu_torture_current_version)

1803

gps等于get_gp_seq()

1804

sd等于stall_dur()加1

1805

sd4等于sd加fwd_progress_div减1的差除fwd_progress_div

1806

dur等于sd4加torture_random( & trs)取模sd减sd4的差

1807

WRITE_ONCE(rcu_fwd_startat, jiffies)

1808

stopat等于rcu_fwd_startat加dur

1809

当time_before(jiffies, stopat)且非Stop aggressive CPU-hog tests a bit before the end of the test in order* to avoid interfering with test shutdown.且非READ_ONCE(rcu_fwd_emergency_stop)且非Is it time for the current torture test to stop?循环

1812

idx等于readlock()

1813

0x10c7 is 2**32 / 1000000 (rounded up) (10)

1814

readunlock(idx)

1815

如果非fwd_progress_need_resched或need_resched()则cond_resched()

1818

tested_tries自加

1819

如果非time_before(jiffies, stopat)且非Stop aggressive CPU-hog tests a bit before the end of the test in order* to avoid interfering with test shutdown.且非READ_ONCE(rcu_fwd_emergency_stop)且非Is it time for the current torture test to stop?则

1822

tested自加

1823

cver等于READ_ONCE(rcu_torture_current_version)减cver

1824

gps等于rcutorture_seq_diff(get_gp_seq(), gps)

1825

WARN_ON(!cver && gps < 2)

1826

打印警报信息("%s: Duration %ld cver %ld gps %ld\n", __func__, dur, cver, gps)

1828

如果selfpropcb则

1829

WRITE_ONCE(stop, 1)

1830

sync()

1831

cb_barrier()

1834

如果selfpropcb则

1835

WARN_ON(READ_ONCE(stop) != 2)

1836

destroy_rcu_head_on_stack( & rh)

1838

schedule_timeout_uninterruptible(HZ / 10)

1839

WRITE_ONCE(Short rcu_torture_delay() delays. , false)

**调用者**
名称	描述
rcu_torture_fwd_prog	Carry out grace-period forward-progress testing.

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