anchao opened a new pull request #2719:
URL: https://github.com/apache/incubator-nuttx/pull/2719
## Summary
sched/task: setup the scheduling policy to task
## Impact
kthread_create / nxtask_create
## Testing
enable CONFIG_RR_INTERVAL
before:
```
ap> ps
PID GROUP PRI POLICY TYPE NPX STATE EVENT SIGMASK STACK
USED FILLED CPU COMMAND
0 0 0 FIFO Kthread N-- Ready 00000000 003072
001408 45.8% 98.9% Idle Task
1 1 253 FIFO Kthread --- Waiting Signal 00000000 003060
000432 14.1% 0.0% hpwork
2 1 253 FIFO Kthread --- Waiting Signal 00000000 003060
000432 14.1% 0.0% hpwork
3 1 253 FIFO Kthread --- Waiting Signal 00000000 003060
000432 14.1% 0.0% hpwork
4 1 100 FIFO Kthread --- Waiting Signal 00000000 004084
001704 41.7% 0.0% lpwork
9 6 253 RR pthread --- Waiting Semaphore 00000000 008168
000496 6.0% 0.0% ....
10 6 100 RR pthread --- Waiting Signal 00000000 003076
000480 15.6% 0.0% ....
11 6 252 RR pthread --- Waiting MQ empty 00000000 010216
001472 14.4% 0.0% ....
12 6 252 RR pthread --- Waiting MQ empty 00000000 008168
000684 8.3% 0.0% ....
13 6 252 RR pthread --- Waiting Semaphore 00000000 004072
001584 38.8% 0.0% ....
14 6 224 FIFO Kthread --- Waiting Signal 00000002 004060
000512 12.6% 0.0% ....
17 -1 100 FIFO Task --- Running 00000000 004084
001568 38.3% 0.5% init
19 9 80 FIFO Task --- Waiting Semaphore 00000000 004084
000640 15.6% 0.0% usrsock
21 6 101 RR pthread --- Waiting MQ empty 00000000 004100
000560 13.6% 0.0% ....
22 6 253 RR pthread --- Waiting MQ empty 00000000 004072
001496 36.7% 0.0% ....
```
```
ap> ps
PID GROUP PRI POLICY TYPE NPX STATE EVENT SIGMASK STACK
USED FILLED CPU COMMAND
0 0 0 FIFO Kthread N-- Ready 00000000 003072
001408 45.8% 98.9% Idle Task
1 1 253 RR Kthread --- Waiting Signal 00000000 003060
000432 14.1% 0.0% hpwork
2 1 253 RR Kthread --- Waiting Signal 00000000 003060
000432 14.1% 0.0% hpwork
3 1 253 RR Kthread --- Waiting Signal 00000000 003060
000432 14.1% 0.0% hpwork
4 1 100 RR Kthread --- Waiting Signal 00000000 004084
001704 41.7% 0.0% lpwork
9 6 253 RR pthread --- Waiting Semaphore 00000000 008168
000496 6.0% 0.0% ....
10 6 100 RR pthread --- Waiting Signal 00000000 003076
000480 15.6% 0.0% ....
11 6 252 RR pthread --- Waiting MQ empty 00000000 010216
001472 14.4% 0.0% ....
12 6 252 RR pthread --- Waiting MQ empty 00000000 008168
000684 8.3% 0.0% ....
13 6 252 RR pthread --- Waiting Semaphore 00000000 004072
001584 38.8% 0.0% ....
14 6 224 RR Kthread --- Waiting Signal 00000002 004060
000512 12.6% 0.0% ....
17 -1 100 RR Task --- Running 00000000 004084
001568 38.3% 0.5% init
19 9 80 RR Task --- Waiting Semaphore 00000000 004084
000640 15.6% 0.0% usrsock
21 6 101 RR pthread --- Waiting MQ empty 00000000 004100
000560 13.6% 0.0% ....
22 6 253 RR pthread --- Waiting MQ empty 00000000 004072
001496 36.7% 0.0% ....
```
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