include/linux/delayacct.h

1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* delayacct.h - per-task delay accounting
27 	 * XXX_count is incremented on every XXX operation, the delay
29 	 * XXX_delay contains the accumulated delay time in nanoseconds.
32 	u64 blkio_delay;	/* wait for sync block io completion */
34 	u64 swapin_delay;	/* wait for swapin */
40 	u64 freepages_delay;	/* wait for memory reclaim */
43 	u64 thrashing_delay;	/* wait for thrashing page */
46 	u64 compact_delay;	/* wait for memory compact */
49 	u64 wpcopy_delay;	/* wait for write-protect copy */
51 	u64 irq_delay;	/* wait for IRQ/SOFTIRQ */
56 	u32 wpcopy_count;	/* total count of write-protect copy */
67 extern int delayacct_on;	/* Delay accounting turned on/off */
91 	/* reinitialize in case parent's non-null pointer was dup'ed*/  in delayacct_tsk_init()
92 	tsk->delays = NULL;  in delayacct_tsk_init()
97 /* Free tsk->delays. Called from bad fork and __put_task_struct
98  * where there's no risk of tsk->delays being accessed elsewhere
102 	if (tsk->delays)  in delayacct_tsk_free()
103 		kmem_cache_free(delayacct_cache, tsk->delays);  in delayacct_tsk_free()
104 	tsk->delays = NULL;  in delayacct_tsk_free()
112 	if (current->delays)  in delayacct_blkio_start()
121 	if (p->delays)  in delayacct_blkio_end()
127 	if (tsk->delays)  in delayacct_blkio_ticks()
137 	if (current->delays)  in delayacct_freepages_start()
146 	if (current->delays)  in delayacct_freepages_end()
155 	if (current->delays)  in delayacct_thrashing_start()
164 	if (current->delays)  in delayacct_thrashing_end()
173 	if (current->delays)  in delayacct_swapin_start()
182 	if (current->delays)  in delayacct_swapin_end()
191 	if (current->delays)  in delayacct_compact_start()
200 	if (current->delays)  in delayacct_compact_end()
209 	if (current->delays)  in delayacct_wpcopy_start()
218 	if (current->delays)  in delayacct_wpcopy_end()
227 	if (task->delays)  in delayacct_irq()