Commit | Line | Data |
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e9f6567a DLM |
1 | /* |
2 | * IO priority handling declarations and helper functions common to the | |
3 | * libaio and io_uring engines. | |
4 | */ | |
5 | ||
6 | #ifndef FIO_CMDPRIO_H | |
7 | #define FIO_CMDPRIO_H | |
8 | ||
9 | #include "../fio.h" | |
10 | ||
11 | struct cmdprio { | |
12 | unsigned int percentage[DDIR_RWDIR_CNT]; | |
12f9d54a DLM |
13 | unsigned int class[DDIR_RWDIR_CNT]; |
14 | unsigned int level[DDIR_RWDIR_CNT]; | |
a48f0cc7 DLM |
15 | unsigned int bssplit_nr[DDIR_RWDIR_CNT]; |
16 | struct bssplit *bssplit[DDIR_RWDIR_CNT]; | |
e9f6567a DLM |
17 | }; |
18 | ||
a48f0cc7 DLM |
19 | static int fio_cmdprio_bssplit_ddir(struct thread_options *to, void *cb_arg, |
20 | enum fio_ddir ddir, char *str, bool data) | |
21 | { | |
22 | struct cmdprio *cmdprio = cb_arg; | |
23 | struct split split; | |
24 | unsigned int i; | |
25 | ||
26 | if (ddir == DDIR_TRIM) | |
27 | return 0; | |
28 | ||
29 | memset(&split, 0, sizeof(split)); | |
30 | ||
31 | if (split_parse_ddir(to, &split, str, data, BSSPLIT_MAX)) | |
32 | return 1; | |
33 | if (!split.nr) | |
34 | return 0; | |
35 | ||
36 | cmdprio->bssplit_nr[ddir] = split.nr; | |
37 | cmdprio->bssplit[ddir] = malloc(split.nr * sizeof(struct bssplit)); | |
38 | if (!cmdprio->bssplit[ddir]) | |
39 | return 1; | |
40 | ||
41 | for (i = 0; i < split.nr; i++) { | |
42 | cmdprio->bssplit[ddir][i].bs = split.val1[i]; | |
43 | if (split.val2[i] == -1U) { | |
44 | cmdprio->bssplit[ddir][i].perc = 0; | |
45 | } else { | |
46 | if (split.val2[i] > 100) | |
47 | cmdprio->bssplit[ddir][i].perc = 100; | |
48 | else | |
49 | cmdprio->bssplit[ddir][i].perc = split.val2[i]; | |
50 | } | |
51 | } | |
52 | ||
53 | return 0; | |
54 | } | |
55 | ||
56 | static int fio_cmdprio_bssplit_parse(struct thread_data *td, const char *input, | |
57 | struct cmdprio *cmdprio) | |
58 | { | |
59 | char *str, *p; | |
60 | int i, ret = 0; | |
61 | ||
62 | p = str = strdup(input); | |
63 | ||
64 | strip_blank_front(&str); | |
65 | strip_blank_end(str); | |
66 | ||
67 | ret = str_split_parse(td, str, fio_cmdprio_bssplit_ddir, cmdprio, false); | |
68 | ||
69 | if (parse_dryrun()) { | |
70 | for (i = 0; i < DDIR_RWDIR_CNT; i++) { | |
71 | free(cmdprio->bssplit[i]); | |
72 | cmdprio->bssplit[i] = NULL; | |
73 | cmdprio->bssplit_nr[i] = 0; | |
74 | } | |
75 | } | |
76 | ||
77 | free(p); | |
78 | return ret; | |
79 | } | |
80 | ||
81 | static inline int fio_cmdprio_percentage(struct cmdprio *cmdprio, | |
82 | struct io_u *io_u) | |
83 | { | |
84 | enum fio_ddir ddir = io_u->ddir; | |
85 | unsigned int p = cmdprio->percentage[ddir]; | |
86 | int i; | |
87 | ||
88 | /* | |
89 | * If cmdprio_percentage option was specified, then use that | |
90 | * percentage. Otherwise, use cmdprio_bssplit percentages depending | |
91 | * on the IO size. | |
92 | */ | |
93 | if (p) | |
94 | return p; | |
95 | ||
96 | for (i = 0; i < cmdprio->bssplit_nr[ddir]; i++) { | |
97 | if (cmdprio->bssplit[ddir][i].bs == io_u->buflen) | |
98 | return cmdprio->bssplit[ddir][i].perc; | |
99 | } | |
100 | ||
101 | return 0; | |
102 | } | |
103 | ||
e9f6567a DLM |
104 | static int fio_cmdprio_init(struct thread_data *td, struct cmdprio *cmdprio, |
105 | bool *has_cmdprio) | |
106 | { | |
107 | struct thread_options *to = &td->o; | |
108 | bool has_cmdprio_percentage = false; | |
a48f0cc7 | 109 | bool has_cmdprio_bssplit = false; |
e9f6567a DLM |
110 | int i; |
111 | ||
12f9d54a | 112 | /* |
a48f0cc7 DLM |
113 | * If cmdprio_percentage/cmdprio_bssplit is set and cmdprio_class |
114 | * is not set, default to RT priority class. | |
12f9d54a | 115 | */ |
e9f6567a | 116 | for (i = 0; i < DDIR_RWDIR_CNT; i++) { |
12f9d54a DLM |
117 | if (cmdprio->percentage[i]) { |
118 | if (!cmdprio->class[i]) | |
119 | cmdprio->class[i] = IOPRIO_CLASS_RT; | |
e9f6567a | 120 | has_cmdprio_percentage = true; |
12f9d54a | 121 | } |
a48f0cc7 DLM |
122 | if (cmdprio->bssplit_nr[i]) { |
123 | if (!cmdprio->class[i]) | |
124 | cmdprio->class[i] = IOPRIO_CLASS_RT; | |
125 | has_cmdprio_bssplit = true; | |
126 | } | |
e9f6567a DLM |
127 | } |
128 | ||
129 | /* | |
130 | * Check for option conflicts | |
131 | */ | |
a48f0cc7 DLM |
132 | if (has_cmdprio_percentage && has_cmdprio_bssplit) { |
133 | log_err("%s: cmdprio_percentage and cmdprio_bssplit options " | |
134 | "are mutually exclusive\n", | |
135 | to->name); | |
136 | return 1; | |
137 | } | |
e9f6567a | 138 | |
a48f0cc7 | 139 | *has_cmdprio = has_cmdprio_percentage || has_cmdprio_bssplit; |
e9f6567a DLM |
140 | |
141 | return 0; | |
142 | } | |
143 | ||
144 | #endif |