| 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()) { |
| 59 | for (i = 0; i < CMDPRIO_RWDIR_CNT; i++) { |
| 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 | */ |
| 104 | for (i = 0; i < CMDPRIO_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; |
| 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 | } |