| 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]; |
| 13 | unsigned int class[DDIR_RWDIR_CNT]; |
| 14 | unsigned int level[DDIR_RWDIR_CNT]; |
| 15 | unsigned int bssplit_nr[DDIR_RWDIR_CNT]; |
| 16 | struct bssplit *bssplit[DDIR_RWDIR_CNT]; |
| 17 | }; |
| 18 | |
| 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 | |
| 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; |
| 109 | bool has_cmdprio_bssplit = false; |
| 110 | int i; |
| 111 | |
| 112 | /* |
| 113 | * If cmdprio_percentage/cmdprio_bssplit is set and cmdprio_class |
| 114 | * is not set, default to RT priority class. |
| 115 | */ |
| 116 | for (i = 0; i < DDIR_RWDIR_CNT; i++) { |
| 117 | if (cmdprio->percentage[i]) { |
| 118 | if (!cmdprio->class[i]) |
| 119 | cmdprio->class[i] = IOPRIO_CLASS_RT; |
| 120 | has_cmdprio_percentage = true; |
| 121 | } |
| 122 | if (cmdprio->bssplit_nr[i]) { |
| 123 | if (!cmdprio->class[i]) |
| 124 | cmdprio->class[i] = IOPRIO_CLASS_RT; |
| 125 | has_cmdprio_bssplit = true; |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | /* |
| 130 | * Check for option conflicts |
| 131 | */ |
| 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 | } |
| 138 | |
| 139 | *has_cmdprio = has_cmdprio_percentage || has_cmdprio_bssplit; |
| 140 | |
| 141 | return 0; |
| 142 | } |
| 143 | |
| 144 | #endif |