Commit f687fd5a authored by Liam R. Howlett's avatar Liam R. Howlett Committed by Andrew Morton
Browse files

testing/radix-tree/maple: increase readers and reduce delay for faster machines 

Faster machines may not see the initial or updated value in the race
condition.  Reduce the delay so that faster machines are less likely to
fail testing of the race conditions.

Link: https://lkml.kernel.org/r/20250616184521.3382795-2-Liam.Howlett@oracle.com


Signed-off-by: default avatarLiam R. Howlett <howlett@gmail.com>
Reviewed-by: default avatarLorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Hailong Liu <hailong.liu@oppo.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent fa493f50

tools/testing/radix-tree/maple.c

+4 −3
Original line number Diff line number Diff line
@@ -35062,7 +35062,7 @@ void run_check_rcu_slowread(struct maple_tree *mt, struct rcu_test_struct *vals) 








	int i;









	void *(*function)(void *);









	pthread_t readers[20];









	pthread_t readers[30];









	unsigned int index = vals->index;

















	mt_set_in_rcu(mt);








@@ -35080,14 +35080,14 @@ void run_check_rcu_slowread(struct maple_tree *mt, struct rcu_test_struct *vals)







		}









	}

















	usleep(5); /* small yield to ensure all threads are at least started. */









	usleep(3); /* small yield to ensure all threads are at least started. */

















	while (index <= vals->last) {









		mtree_store(mt, index,









			    (index % 2 ? vals->entry2 : vals->entry3),









			    GFP_KERNEL);









		index++;









		usleep(5);









		usleep(2);









	}

















	while (i--)








@@ -35098,6 +35098,7 @@ void run_check_rcu_slowread(struct maple_tree *mt, struct rcu_test_struct *vals)







	MT_BUG_ON(mt, !vals->seen_entry3);









	MT_BUG_ON(mt, !vals->seen_both);









}

















static noinline void __init check_rcu_simulated(struct maple_tree *mt)









{









	unsigned long i, nr_entries = 1000;