Commit | Line | Data |
---|---|---|
e27b9ff0 NC |
1 | /* |
2 | * IO priority handling helper functions common to the libaio and io_uring | |
3 | * engines. | |
4 | */ | |
5 | ||
6 | #include "cmdprio.h" | |
7 | ||
8 | static int fio_cmdprio_bssplit_ddir(struct thread_options *to, void *cb_arg, | |
9 | enum fio_ddir ddir, char *str, bool data) | |
10 | { | |
11 | struct cmdprio *cmdprio = cb_arg; | |
12 | struct split split; | |
13 | unsigned int i; | |
14 | ||
15 | if (ddir == DDIR_TRIM) | |
16 | return 0; | |
17 | ||
18 | memset(&split, 0, sizeof(split)); | |
19 | ||
20 | if (split_parse_ddir(to, &split, str, data, BSSPLIT_MAX)) | |
21 | return 1; | |
22 | if (!split.nr) | |
23 | return 0; | |
24 | ||
25 | cmdprio->bssplit_nr[ddir] = split.nr; | |
26 | cmdprio->bssplit[ddir] = malloc(split.nr * sizeof(struct bssplit)); | |
27 | if (!cmdprio->bssplit[ddir]) | |
28 | return 1; | |
29 | ||
30 | for (i = 0; i < split.nr; i++) { | |
31 | cmdprio->bssplit[ddir][i].bs = split.val1[i]; | |
32 | if (split.val2[i] == -1U) { | |
33 | cmdprio->bssplit[ddir][i].perc = 0; | |
34 | } else { | |
35 | if (split.val2[i] > 100) | |
36 | cmdprio->bssplit[ddir][i].perc = 100; | |
37 | else | |
38 | cmdprio->bssplit[ddir][i].perc = split.val2[i]; | |
39 | } | |
40 | } | |
41 | ||
42 | return 0; | |
43 | } | |
44 | ||
45 | int fio_cmdprio_bssplit_parse(struct thread_data *td, const char *input, | |
46 | struct cmdprio *cmdprio) | |
47 | { | |
48 | char *str, *p; | |
49 | int i, ret = 0; | |
50 | ||
51 | p = str = strdup(input); | |
52 | ||
53 | strip_blank_front(&str); | |
54 | strip_blank_end(str); | |
55 | ||
56 | ret = str_split_parse(td, str, fio_cmdprio_bssplit_ddir, cmdprio, false); | |
57 | ||
58 | if (parse_dryrun()) { | |
a5af2a8b | 59 | for (i = 0; i < CMDPRIO_RWDIR_CNT; i++) { |
e27b9ff0 NC |
60 | free(cmdprio->bssplit[i]); |
61 | cmdprio->bssplit[i] = NULL; | |
62 | cmdprio->bssplit_nr[i] = 0; | |
63 | } | |
64 | } | |
65 | ||
66 | free(p); | |
67 | return ret; | |
68 | } | |
69 | ||
70 | int fio_cmdprio_percentage(struct cmdprio *cmdprio, struct io_u *io_u) | |
71 | { | |
72 | enum fio_ddir ddir = io_u->ddir; | |
73 | unsigned int p = cmdprio->percentage[ddir]; | |
74 | int i; | |
75 | ||
76 | /* | |
77 | * If cmdprio_percentage option was specified, then use that | |
78 | * percentage. Otherwise, use cmdprio_bssplit percentages depending | |
79 | * on the IO size. | |
80 | */ | |
81 | if (p) | |
82 | return p; | |
83 | ||
84 | for (i = 0; i < cmdprio->bssplit_nr[ddir]; i++) { | |
85 | if (cmdprio->bssplit[ddir][i].bs == io_u->buflen) | |
86 | return cmdprio->bssplit[ddir][i].perc; | |
87 | } | |
88 | ||
89 | return 0; | |
90 | } | |
91 | ||
92 | int fio_cmdprio_init(struct thread_data *td, struct cmdprio *cmdprio, | |
93 | bool *has_cmdprio) | |
94 | { | |
95 | struct thread_options *to = &td->o; | |
96 | bool has_cmdprio_percentage = false; | |
97 | bool has_cmdprio_bssplit = false; | |
98 | int i; | |
99 | ||
100 | /* | |
101 | * If cmdprio_percentage/cmdprio_bssplit is set and cmdprio_class | |
102 | * is not set, default to RT priority class. | |
103 | */ | |
a5af2a8b | 104 | for (i = 0; i < CMDPRIO_RWDIR_CNT; i++) { |
e27b9ff0 NC |
105 | if (cmdprio->percentage[i]) { |
106 | if (!cmdprio->class[i]) | |
107 | cmdprio->class[i] = IOPRIO_CLASS_RT; | |
108 | has_cmdprio_percentage = true; | |
109 | } | |
110 | if (cmdprio->bssplit_nr[i]) { | |
111 | if (!cmdprio->class[i]) | |
112 | cmdprio->class[i] = IOPRIO_CLASS_RT; | |
113 | has_cmdprio_bssplit = true; | |
114 | } | |
115 | } | |
116 | ||
117 | /* | |
118 | * Check for option conflicts | |
119 | */ | |
120 | if (has_cmdprio_percentage && has_cmdprio_bssplit) { | |
121 | log_err("%s: cmdprio_percentage and cmdprio_bssplit options " | |
122 | "are mutually exclusive\n", | |
123 | to->name); | |
124 | return 1; | |
125 | } | |
126 | ||
127 | *has_cmdprio = has_cmdprio_percentage || has_cmdprio_bssplit; | |
128 | ||
129 | return 0; | |
130 | } |