schedutils: add support for SCHED_BATCH

Signed-off-by: Karel Zak <kzak@redhat.com>

diff --git a/schedutils/chrt.1 b/schedutils/chrt.1
index 6fe8182013ab585eab0115e9be2e74c38f350643..9ffc084b5e6e689f1e2a468154299d0978291b81 100644 (file)
--- a/schedutils/chrt.1
+++ b/schedutils/chrt.1
@@ -36,10 +36,11 @@ chrt \- manipulate real-time attributes of a process
 .BR chrt (1)
 sets or retrieves the real-time scheduling attributes of an existing PID or
 runs COMMAND with the given attributes.  Both policy (one of
+.BR SCHED_OTHER ,
 .BR SCHED_FIFO ,
 .BR SCHED_RR ,
 or
-.BR SCHED_OTHER )
+.BR SCHED_BATCH )
 and priority can be set and retrieved.
 .SH OPTIONS
 .TP
@@ -47,6 +48,10 @@ and priority can be set and retrieved.
 operate on an existing PID and do not launch a new task
 .TP
 
+.TP
+.B -b, --batch
+set scheduling policy to
+.BR SCHED_BATCH
 .TP
 .B -f, --fifo
 set scheduling policy to

diff --git a/schedutils/chrt.c b/schedutils/chrt.c
index 7adff1c4fa2d6ea759a409e39b36d02b7edd15cf..4c190a82d3461d1be699740b72ae1c36d7f12ae2 100644 (file)
--- a/schedutils/chrt.c
+++ b/schedutils/chrt.c
@@ -36,6 +36,8 @@ static void show_usage(const char *cmd)
        fprintf(stderr, "usage: %s [options] [prio] [pid | cmd [args...]]\n",
                        cmd);
        fprintf(stderr, "manipulate real-time attributes of a process\n");
+       fprintf(stderr, "  -b, --batch                        "
+                       "set policy to SCHED_BATCH\n");
        fprintf(stderr, "  -f, --fifo                         "
                        "set policy to SCHED_FF\n");
        fprintf(stderr, "  -p, --pid                          "
@@ -83,6 +85,9 @@ static void show_rt_info(const char *what, pid_t pid)
        case SCHED_RR:
                printf("SCHED_RR\n");
                break;
+       case SCHED_BATCH:
+               printf("SCHED_BATCH\n");
+               break;
        default:
                printf("unknown\n");
        }
@@ -101,6 +106,13 @@ static void show_min_max(void)
 {
        int max, min;
 
+       max = sched_get_priority_max(SCHED_OTHER);
+       min = sched_get_priority_min(SCHED_OTHER);
+       if (max >= 0 && min >= 0)
+               printf("SCHED_OTHER min/max priority\t: %d/%d\n", min, max);
+       else
+               printf("SCHED_OTHER not supported?\n");
+
        max = sched_get_priority_max(SCHED_FIFO);
        min = sched_get_priority_min(SCHED_FIFO);
        if (max >= 0 && min >= 0)
@@ -115,12 +127,12 @@ static void show_min_max(void)
        else
                printf("SCHED_RR not supported?\n");
 
-       max = sched_get_priority_max(SCHED_OTHER);
-       min = sched_get_priority_min(SCHED_OTHER);
+       max = sched_get_priority_max(SCHED_BATCH);
+       min = sched_get_priority_min(SCHED_BATCH);
        if (max >= 0 && min >= 0)
-               printf("SCHED_OTHER min/max priority\t: %d/%d\n", min, max);
+               printf("SCHED_BATCH min/max priority\t: %d/%d\n", min, max);
        else
-               printf("SCHED_OTHER not supported?\n");
+               printf("SCHED_BATCH not supported?\n");
 }
 
 int main(int argc, char *argv[])
@@ -130,6 +142,7 @@ int main(int argc, char *argv[])
        pid_t pid = 0;
 
        struct option longopts[] = {
+               { "batch",      0, NULL, 'b' },
                { "fifo",       0, NULL, 'f' },
                { "pid",        0, NULL, 'p' },
                { "help",       0, NULL, 'h' },
@@ -141,11 +154,14 @@ int main(int argc, char *argv[])
                { NULL,         0, NULL, 0 }
        };
 
-       while((i = getopt_long(argc, argv, "+fphmorvV", longopts, NULL)) != -1)
+       while((i = getopt_long(argc, argv, "+bfphmorvV", longopts, NULL)) != -1)
        {
                int ret = 1;
 
                switch (i) {
+               case 'b':
+                       policy = SCHED_BATCH;
+                       break;
                case 'f':
                        policy = SCHED_FIFO;
                        break;