Lines Matching +full:clock +full:- +full:accuracy

1 .. SPDX-License-Identifier: GPL-2.0
17 .. list-table::
19    :header-rows: 2
21    * -
22      - `*delay()`
23      - `usleep_range*()`
24      - `*sleep()`
25      - `fsleep()`
26    * -
27      - busy-wait loop
28      - hrtimers based
29      - timer list timers based
30      - combines the others
31    * - Usage in atomic Context
32      - yes
33      - no
34      - no
35      - no
36    * - precise on "short intervals"
37      - yes
38      - yes
39      - depends
40      - yes
41    * - precise on "long intervals"
42      - Do not use!
43      - yes
44      - max 12.5% slack
45      - yes
46    * - interruptible variant
47      - no
48      - yes
49      - yes
50      - no
57 #. Use `usleep_range*()` whenever accuracy of `*sleep()` is not sufficient
64 ------------------------------
66 These functions use the jiffy estimation of clock speed and will busy wait for
74 .. kernel-doc:: include/asm-generic/delay.h
77 .. kernel-doc:: include/linux/delay.h
82 ----------------------------------------------------
88 #. hrtimers are more expensive as they are using an rb-tree (instead of hashing)
98 #. Use `usleep_range*()` whenever accuracy of `*sleep()` is not sufficient
100 First check fsleep() function description and to learn more about accuracy,
107 .. kernel-doc:: include/linux/delay.h
110 .. kernel-doc:: kernel/time/sleep_timeout.c
117 .. kernel-doc:: kernel/time/sleep_timeout.c
120 .. kernel-doc:: include/linux/delay.h