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@@ -17,13 +17,14 @@
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//kbuild:lib-$(CONFIG_CHRT) += chrt.o
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//usage:#define chrt_trivial_usage
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-//usage: "[-prfom] [PRIO] [PID | PROG ARGS]"
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+//usage: "[-prfomb] [PRIO] [PID | PROG ARGS]"
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//usage:#define chrt_full_usage "\n\n"
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//usage: "Change scheduling priority and class for a process\n"
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//usage: "\n -p Operate on PID"
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//usage: "\n -r Set SCHED_RR class"
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//usage: "\n -f Set SCHED_FIFO class"
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//usage: "\n -o Set SCHED_OTHER class"
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+//usage: "\n -b Set SCHED_BATCH class"
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//usage: "\n -m Show min/max priorities"
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//usage:
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//usage:#define chrt_example_usage
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@@ -40,11 +41,11 @@ static const struct {
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} policies[] = {
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{SCHED_OTHER, "SCHED_OTHER"},
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{SCHED_FIFO, "SCHED_FIFO"},
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- {SCHED_RR, "SCHED_RR"}
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+ {SCHED_RR, "SCHED_RR"},
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+ {SCHED_BATCH, "SCHED_BATCH"}
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};
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//TODO: add
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-// -b, SCHED_BATCH
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// -i, SCHED_IDLE
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static void show_min_max(int pol)
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@@ -64,6 +65,7 @@ static void show_min_max(int pol)
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#define OPT_r (1<<2)
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#define OPT_f (1<<3)
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#define OPT_o (1<<4)
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+#define OPT_b (1<<5)
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int chrt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int chrt_main(int argc UNUSED_PARAM, char **argv)
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@@ -77,11 +79,12 @@ int chrt_main(int argc UNUSED_PARAM, char **argv)
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int policy = SCHED_RR;
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/* only one policy accepted */
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- opt = getopt32(argv, "^+" "mprfo" "\0" "r--fo:f--ro:o--rf");
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+ opt = getopt32(argv, "^+" "mprfob" "\0" "r--fob:f--rob:o--rfb:b--rfo");
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if (opt & OPT_m) { /* print min/max and exit */
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show_min_max(SCHED_FIFO);
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show_min_max(SCHED_RR);
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show_min_max(SCHED_OTHER);
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+ show_min_max(SCHED_BATCH);
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fflush_stdout_and_exit(EXIT_SUCCESS);
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}
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if (opt & OPT_r)
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@@ -90,6 +93,8 @@ int chrt_main(int argc UNUSED_PARAM, char **argv)
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policy = SCHED_FIFO;
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if (opt & OPT_o)
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policy = SCHED_OTHER;
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+ if (opt & OPT_b)
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+ policy = SCHED_BATCH;
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argv += optind;
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if (!argv[0])
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@@ -136,7 +141,8 @@ int chrt_main(int argc UNUSED_PARAM, char **argv)
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[...] SCHED_OTHER or SCHED_BATCH must be assigned static priority 0.
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[...] SCHED_FIFO or SCHED_RR can have static priority in 1..99 range.
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*/
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- sp.sched_priority = xstrtou_range(priority, 0, policy != SCHED_OTHER ? 1 : 0, 99);
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+ sp.sched_priority = xstrtou_range(priority, 0,
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+ (policy != SCHED_OTHER && policy != SCHED_BATCH) ? 1 : 0, 99);
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if (sched_setscheduler(pid, policy, &sp) < 0)
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bb_perror_msg_and_die("can't %cet pid %d's policy", 's', (int)pid);
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