2 * IO priority handling helper functions common to the libaio and io_uring
8 static int fio_cmdprio_bssplit_ddir(struct thread_options *to, void *cb_arg,
9 enum fio_ddir ddir, char *str, bool data)
11 struct cmdprio *cmdprio = cb_arg;
15 if (ddir == DDIR_TRIM)
18 memset(&split, 0, sizeof(split));
20 if (split_parse_ddir(to, &split, str, data, BSSPLIT_MAX))
25 cmdprio->bssplit_nr[ddir] = split.nr;
26 cmdprio->bssplit[ddir] = malloc(split.nr * sizeof(struct bssplit));
27 if (!cmdprio->bssplit[ddir])
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;
35 if (split.val2[i] > 100)
36 cmdprio->bssplit[ddir][i].perc = 100;
38 cmdprio->bssplit[ddir][i].perc = split.val2[i];
45 int fio_cmdprio_bssplit_parse(struct thread_data *td, const char *input,
46 struct cmdprio *cmdprio)
51 p = str = strdup(input);
53 strip_blank_front(&str);
56 ret = str_split_parse(td, str, fio_cmdprio_bssplit_ddir, cmdprio, false);
59 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
60 free(cmdprio->bssplit[i]);
61 cmdprio->bssplit[i] = NULL;
62 cmdprio->bssplit_nr[i] = 0;
70 int fio_cmdprio_percentage(struct cmdprio *cmdprio, struct io_u *io_u)
72 enum fio_ddir ddir = io_u->ddir;
73 unsigned int p = cmdprio->percentage[ddir];
77 * If cmdprio_percentage option was specified, then use that
78 * percentage. Otherwise, use cmdprio_bssplit percentages depending
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;
92 int fio_cmdprio_init(struct thread_data *td, struct cmdprio *cmdprio,
95 struct thread_options *to = &td->o;
96 bool has_cmdprio_percentage = false;
97 bool has_cmdprio_bssplit = false;
101 * If cmdprio_percentage/cmdprio_bssplit is set and cmdprio_class
102 * is not set, default to RT priority class.
104 for (i = 0; i < DDIR_RWDIR_CNT; i++) {
105 if (cmdprio->percentage[i]) {
106 if (!cmdprio->class[i])
107 cmdprio->class[i] = IOPRIO_CLASS_RT;
108 has_cmdprio_percentage = true;
110 if (cmdprio->bssplit_nr[i]) {
111 if (!cmdprio->class[i])
112 cmdprio->class[i] = IOPRIO_CLASS_RT;
113 has_cmdprio_bssplit = true;
118 * Check for option conflicts
120 if (has_cmdprio_percentage && has_cmdprio_bssplit) {
121 log_err("%s: cmdprio_percentage and cmdprio_bssplit options "
122 "are mutually exclusive\n",
127 *has_cmdprio = has_cmdprio_percentage || has_cmdprio_bssplit;