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| author | Povilas Kanapickas <povilas@radix.lt> | 2018-01-13 23:27:37 +0200 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2018-01-23 16:04:48 +0100 |
| commit | 0f6e4350b3c36b3b4533d0ea910481e28d5f81ab (patch) | |
| tree | 3394e56ccd93fbbe7bf9d5118f175b5a9234e50a | |
| parent | 1616fb8aca23fd7ba6b379b0fb38d3327d1e31d1 (diff) | |
| download | busybox-0f6e4350b3c36b3b4533d0ea910481e28d5f81ab.tar.gz | |
chrt: add support for SCHED_IDLE
Signed-off-by: Povilas Kanapickas <povilas@radix.lt>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | util-linux/chrt.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/util-linux/chrt.c b/util-linux/chrt.c index e7abd4f5a..bbd6e2deb 100644 --- a/util-linux/chrt.c +++ b/util-linux/chrt.c @@ -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); |