0f6e4350b
Povilas Kanapickas
2018-01-23
Subject
chrt: add support for SCHED_IDLE
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Commit Diff GitHub →
util-linux/chrt.c+13 -8
| @@ -17,7 +17,7 @@ | |
| //kbuild:lib-$(CONFIG_CHRT) += chrt.o | |
| //usage:#define chrt_trivial_usage | |
| - | //usage: "[-prfomb] [PRIO] [PID | PROG ARGS]" |
| + | //usage: "[-prfombi] [PRIO] [PID | PROG ARGS]" |
| //usage:#define chrt_full_usage "\n\n" | |
| //usage: "Change scheduling priority and class for a process\n" | |
| //usage: "\n -p Operate on PID" | |
| @@ -25,6 +25,7 @@ | |
| //usage: "\n -f Set SCHED_FIFO class" | |
| //usage: "\n -o Set SCHED_OTHER class" | |
| //usage: "\n -b Set SCHED_BATCH class" | |
| + | //usage: "\n -i Set SCHED_IDLE class" |
| //usage: "\n -m Show min/max priorities" | |
| //usage: | |
| //usage:#define chrt_example_usage | |
| @@ -42,12 +43,11 @@ static const struct { | |
| {SCHED_OTHER, "SCHED_OTHER"}, | |
| {SCHED_FIFO, "SCHED_FIFO"}, | |
| {SCHED_RR, "SCHED_RR"}, | |
| - | {SCHED_BATCH, "SCHED_BATCH"} |
| + | {SCHED_BATCH, "SCHED_BATCH"}, |
| + | {0 /* unused */, ""}, |
| + | {SCHED_IDLE, "SCHED_IDLE"} |
| }; | |
| - | //TODO: add |
| - | // -i, SCHED_IDLE |
| - | |
| static void show_min_max(int pol) | |
| { | |
| const char *fmt = "%s min/max priority\t: %u/%u\n"; | |
| @@ -66,6 +66,7 @@ static void show_min_max(int pol) | |
| #define OPT_f (1<<3) | |
| #define OPT_o (1<<4) | |
| #define OPT_b (1<<5) | |
| + | #define OPT_i (1<<6) |
| int chrt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; | |
| int chrt_main(int argc UNUSED_PARAM, char **argv) | |
| @@ -79,12 +80,13 @@ int chrt_main(int argc UNUSED_PARAM, char **argv) | |
| int policy = SCHED_RR; | |
| /* only one policy accepted */ | |
| - | opt = getopt32(argv, "^+" "mprfob" "\0" "r--fob:f--rob:o--rfb:b--rfo"); |
| + | opt = getopt32(argv, "^+" "mprfobi" "\0" "r--fobi:f--robi:o--rfbi:b--rfoi:i--rfob"); |
| if (opt & OPT_m) { /* print min/max and exit */ | |
| show_min_max(SCHED_FIFO); | |
| show_min_max(SCHED_RR); | |
| show_min_max(SCHED_OTHER); | |
| show_min_max(SCHED_BATCH); | |
| + | show_min_max(SCHED_IDLE); |
| fflush_stdout_and_exit(EXIT_SUCCESS); | |
| } | |
| if (opt & OPT_r) | |
| @@ -95,6 +97,8 @@ int chrt_main(int argc UNUSED_PARAM, char **argv) | |
| policy = SCHED_OTHER; | |
| if (opt & OPT_b) | |
| policy = SCHED_BATCH; | |
| + | if (opt & OPT_i) |
| + | policy = SCHED_IDLE; |
| argv += optind; | |
| if (!argv[0]) | |
| @@ -138,11 +142,12 @@ int chrt_main(int argc UNUSED_PARAM, char **argv) | |
| /* from the manpage of sched_getscheduler: | |
| [...] sched_priority can have a value in the range 0 to 99. | |
| - | [...] SCHED_OTHER or SCHED_BATCH must be assigned static priority 0. |
| + | [...] SCHED_OTHER, SCHED_BATCH or SCHED_IDLE must be assigned static |
| + | priority 0. |
| [...] SCHED_FIFO or SCHED_RR can have static priority in 1..99 range. | |
| */ | |
| sp.sched_priority = xstrtou_range(priority, 0, | |
| - | (policy != SCHED_OTHER && policy != SCHED_BATCH) ? 1 : 0, 99); |
| + | (policy != SCHED_OTHER && policy != SCHED_BATCH && policy != SCHED_IDLE) ? 1 : 0, 99); |
| if (sched_setscheduler(pid, policy, &sp) < 0) | |
| bb_perror_msg_and_die("can't %cet pid %d's policy", 's', (int)pid); | |