anjiahao1 commented on PR #13579:
URL: https://github.com/apache/nuttx/pull/13579#issuecomment-2373914548

   test with rv-virt:knsh
   ```
   $ qemu-system-riscv32 -M virt,aclint=on -cpu rv32 -kernel nuttx -nographic 
-semihosting
   
   OpenSBI v1.3.1
      ____                    _____ ____ _____
     / __ \                  / ____|  _ \_   _|
    | |  | |_ __   ___ _ __ | (___ | |_) || |
    | |  | | '_ \ / _ \ '_ \ \___ \|  _ < | |
    | |__| | |_) |  __/ | | |____) | |_) || |_
     \____/| .__/ \___|_| |_|_____/|___/_____|
           | |
           |_|
   
   Platform Name             : riscv-virtio,qemu
   Platform Features         : medeleg
   Platform HART Count       : 1
   Platform IPI Device       : aclint-mswi
   Platform Timer Device     : aclint-mtimer @ 10000000Hz
   Platform Console Device   : semihosting
   Platform HSM Device       : ---
   Platform PMU Device       : ---
   Platform Reboot Device    : sifive_test
   Platform Shutdown Device  : sifive_test
   Platform Suspend Device   : ---
   Platform CPPC Device      : ---
   Firmware Base             : 0x80000000
   Firmware Size             : 190 KB
   Firmware RW Offset        : 0x20000
   Firmware RW Size          : 62 KB
   Firmware Heap Offset      : 0x27000
   Firmware Heap Size        : 34 KB (total), 2 KB (reserved), 8 KB (used), 23 
KB (free)
   Firmware Scratch Size     : 4096 B (total), 464 B (used), 3632 B (free)
   Runtime SBI Version       : 1.0
   
   Domain0 Name              : root
   Domain0 Boot HART         : 0
   Domain0 HARTs             : 0*
   Domain0 Region00          : 0x02000000-0x0200ffff M: (I,R,W) S/U: ()
   Domain0 Region01          : 0x80020000-0x8002ffff M: (R,W) S/U: ()
   Domain0 Region02          : 0x80000000-0x8001ffff M: (R,X) S/U: ()
   Domain0 Region03          : 0x00000000-0xffffffff M: (R,W,X) S/U: (R,W,X)
   Domain0 Next Address      : 0x80200000
   Domain0 Next Arg1         : 0x87e00000
   Domain0 Next Mode         : S-mode
   Domain0 SysReset          : yes
   Domain0 SysSuspend        : yes
   
   Boot HART ID              : 0
   Boot HART Domain          : root
   Boot HART Priv Version    : v1.12
   Boot HART Base ISA        : rv32imafdch
   Boot HART ISA Extensions  : time,sstc
   Boot HART PMP Count       : 16
   Boot HART PMP Granularity : 4
   Boot HART PMP Address Bits: 32
   Boot HART MHPM Count      : 16
   Boot HART MIDELEG         : 0x00001666
   Boot HART MEDELEG         : 0x00f0b509
   ABC
   NuttShell (NSH) NuttX-12.3.0-vela
   nsh>
   nsh>
   nsh>
   nsh> ostest
   stdio_test: write fd=1
   stdio_test: Standard I/O Check: printf
   stdio_test: write fd=2
   stdio_test: Standard I/O Check: fprintf to stderr
   ostest_main: putenv(Variable1=BadValue3)
   ostest_main: setenv(Variable1, GoodValue1, TRUE)
   ostest_main: setenv(Variable2, BadValue1, FALSE)
   ostest_main: setenv(Variable2, GoodValue2, TRUE)
   ostest_main: setenv(Variable3, GoodValue3, FALSE)
   ostest_main: setenv(Variable3, BadValue2, FALSE)
   show_variable: Variable=Variable1 has value=GoodValue1
   show_variable: Variable=Variable2 has value=GoodValue2
   show_variable: Variable=Variable3 has value=GoodValue3
   ostest_main: Started user_main at PID=4
   
   user_main: Begin argument test
   user_main: Started with argc=5
   user_main: argv[0]="user_main"
   user_main: argv[1]="Arg1"
   user_main: argv[2]="Arg2"
   user_main: argv[3]="Arg3"
   user_main: argv[4]="Arg4"
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         2        2
   mxordblk    7cff8    7cff8
   uordblks     23ec     23ec
   fordblks    7ec10    7ec10
   
   user_main: getopt() test
   getopt():  Simple test
   getopt():  Invalid argument
   getopt():  Missing optional argument
   getopt_long():  Simple test
   getopt_long():  No short options
   getopt_long():  Argument for --option=argument
   getopt_long():  Invalid long option
   getopt_long():  Mixed long and short options
   getopt_long():  Invalid short option
   getopt_long():  Missing optional arguments
   getopt_long_only():  Mixed long and short options
   getopt_long_only():  Single hyphen long options
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         2        2
   mxordblk    7cff8    7cff8
   uordblks     23ec     23ec
   fordblks    7ec10    7ec10
   
   user_main: libc tests
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         2        2
   mxordblk    7cff8    7cff8
   uordblks     23ec     23ec
   fordblks    7ec10    7ec10
   show_variable: Variable=Variable1 has value=GoodValue1
   show_variable: Variable=Variable2 has value=GoodValue2
   show_variable: Variable=Variable3 has value=GoodValue3
   show_variable: Variable=Variable1 has no value
   show_variable: Variable=Variable2 has value=GoodValue2
   show_variable: Variable=Variable3 has value=GoodValue3
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         2        3
   mxordblk    7cff8    7cff8
   uordblks     23ec     23cc
   fordblks    7ec10    7ec30
   show_variable: Variable=Variable1 has no value
   show_variable: Variable=Variable2 has no value
   show_variable: Variable=Variable3 has no value
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         3        2
   mxordblk    7cff8    7cff8
   uordblks     23cc     2334
   fordblks    7ec30    7ecc8
   
   user_main: setvbuf test
   setvbuf_test: Test NO buffering
   setvbuf_test: Using NO buffering
   setvbuf_test: Test default FULL buffering
   setvbuf_test: Using default FULL buffering
   setvbuf_test: Test FULL buffering, buffer size 64
   setvbuf_test: Using FULL buffering, buffer size 64
   setvbuf_test: Test FULL buffering, pre-allocated buffer
   setvbuf_test: Using FULL buffering, pre-allocated buffer
   setvbuf_test: Test LINE buffering, buffer size 64
   setvbuf_test: Using LINE buffering, buffer size 64
   setvbuf_test: Test FULL buffering, pre-allocated buffer
   setvbuf_test: Using FULL buffering, pre-allocated buffer
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         2        2
   mxordblk    7cff8    7cff8
   uordblks     2334     2334
   fordblks    7ecc8    7ecc8
   
   user_main: /dev/null test
   dev_null: Read 0 bytes from /dev/null
   dev_null: Wrote 1024 bytes to /dev/null
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         2        2
   mxordblk    7cff8    7cff8
   uordblks     2334     2334
   fordblks    7ecc8    7ecc8
   
   user_main: mutex test
   Initializing mutex
   Starting thread 1
   Starting thread 2
                   Thread1 Thread2
           Loops   32      32
           Errors  0       0
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         2        4
   mxordblk    7cff8    787f8
   uordblks     2334     3344
   fordblks    7ecc8    7dcb8
   
   user_main: timed mutex test
   mutex_test: Initializing mutex
   mutex_test: Starting thread
   pthread:  Started
   pthread:  Waiting for lock or timeout
   mutex_test: Unlocking
   pthread:  Got the lock
   pthread:  Waiting for lock or timeout
   pthread:  Got the timeout.  Terminating
   mutex_test: PASSED
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         4        3
   mxordblk    787f8    7a7f8
   uordblks     3344     2b3c
   fordblks    7dcb8    7e4c0
   
   user_main: cancel test
   cancel_test: Test 1a: Normal Cancellation
   cancel_test: Starting thread
   start_thread: Initializing mutex
   start_thread: Initializing cond
   start_thread: Starting thread
   start_thread: Yielding
   sem_waiter: Taking mutex
   sem_waiter: Starting wait for condition
   cancel_test: Canceling thread
   cancel_test: Joining
   cancel_test: waiter exited with result=0xffffffff
   cancel_test: PASS thread terminated with PTHREAD_CANCELED
   cancel_test: Test 2: Asynchronous Cancellation
   ... Skipped
   cancel_test: Test 3: Cancellation of detached thread
   cancel_test: Re-starting thread
   restart_thread: Destroying cond
   restart_thread: Destroying mutex
   restart_thread: Re-starting thread
   start_thread: Initializing mutex
   start_thread: Initializing cond
   start_thread: Starting thread
   start_thread: Yielding
   sem_waiter: Taking mutex
   sem_waiter: Starting wait for condition
   cancel_test: Canceling thread
   cancel_test: Joining
   cancel_test: PASS pthread_join failed with status=ESRCH
   cancel_test: Test 5: Non-cancelable threads
   cancel_test: Re-starting thread (non-cancelable)
   restart_thread: Destroying cond
   restart_thread: Destroying mutex
   restart_thread: Re-starting thread
   start_thread: Initializing mutex
   start_thread: Initializing cond
   start_thread: Starting thread
   start_thread: Yielding
   sem_waiter: Taking mutex
   sem_waiter: Starting wait for condition
   sem_waiter: Setting non-cancelable
   cancel_test: Canceling thread
   cancel_test: Joining
   sem_waiter: Releasing mutex
   sem_waiter: Setting cancelable
   cancel_test: waiter exited with result=0xffffffff
   cancel_test: PASS thread terminated with PTHREAD_CANCELED
   cancel_test: Test 6: Cancel message queue wait
   cancel_test: Starting thread (cancelable)
   Skipped
   cancel_test: Test 7: Cancel signal wait
   cancel_test: Starting thread (cancelable)
   Skipped
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         3        3
   mxordblk    7a7f8    78ff8
   uordblks     2b3c     433c
   fordblks    7e4c0    7ccc0
   
   user_main: robust test
   robust_test: Initializing mutex
   robust_test: Starting thread
   robust_waiter: Taking mutex
   robust_waiter: Exiting with mutex
   robust_test: Take the lock again
   robust_test: Make the mutex consistent again.
   robust_test: Take the lock again
   robust_test: Joining
   robust_test: waiter exited with result=0
   robust_test: Test complete with nerrors=0
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         3        3
   mxordblk    78ff8    78ff8
   uordblks     433c     433c
   fordblks    7ccc0    7ccc0
   
   user_main: semaphore test
   sem_test: Initializing semaphore to 0
   sem_test: Starting waiter thread 1
   sem_test: Set thread 1 priority to 191
   waiter_func: Thread 1 Started
   waiter_func: Thread 1 initial semaphore value = 0
   waiter_func: Thread 1 waiting on semaphore
   sem_test: Starting waiter thread 2
   sem_test: Set thread 2 priority to 128
   waiter_func: Thread 2 Started
   waiter_func: Thread 2 initial semaphore value = -1
   waiter_func: Thread 2 waiting on semaphore
   sem_test: Starting poster thread 3
   sem_test: Set thread 3 priority to 64
   poster_func: Thread 3 started
   poster_func: Thread 3 semaphore value = -2
   poster_func: Thread 3 posting semaphore
   waiter_func: Thread 1 awakened
   waiter_func: Thread 1 new semaphore value = -1
   waiter_func: Thread 1 done
   poster_func: Thread 3 new semaphore value = -1
   poster_func: Thread 3 semaphore value = -1
   poster_func: Thread 3 posting semaphore
   waiter_func: Thread 2 awakened
   waiter_func: Thread 2 new semaphore value = 0
   waiter_func: Thread 2 done
   poster_func: Thread 3 new semaphore value = 0
   poster_func: Thread 3 done
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         3        5
   mxordblk    78ff8    767f8
   uordblks     433c     3b4c
   fordblks    7ccc0    7d4b0
   
   user_main: timed semaphore test
   semtimed_test: Initializing semaphore to 0
   semtimed_test: Waiting for two second timeout
   semtimed_test: PASS: first test returned timeout
   BEFORE: (17 sec, 990000000 nsec)
   AFTER:  (19 sec, 991000000 nsec)
   semtimed_test: Starting poster thread
   semtimed_test: Set thread 1 priority to 191
   semtimed_test: Starting poster thread 3
   semtimed_test: Set thread 3 priority to 64
   semtimed_test: Waiting for two second timeout
   poster_func: Waiting for 1 second
   poster_func: Posting
   semtimed_test: PASS: sem_timedwait succeeded
   BEFORE: (19 sec, 993000000 nsec)
   AFTER:  (20 sec, 994000000 nsec)
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         5        3
   mxordblk    767f8    7a7f8
   uordblks     3b4c     2b3c
   fordblks    7d4b0    7e4c0
   
   user_main: condition variable test
   cond_test: Initializing mutex
   cond_test: Initializing cond
   cond_test: Starting waiter
   cond_test: Set thread 1 priority to 128
   waiter_thread: Started
   cond_test: Starting signaler
   cond_test: Set thread 2 priority to 64
   thread_signaler: Started
   thread_signaler: Terminating
   cond_test: signaler terminated, now cancel the waiter
   cond_test:      Waiter  Signaler
   cond_test: Loops        32      32
   cond_test: Errors       0       0
   cond_test:
   cond_test: 0 times, waiter did not have to wait for data
   cond_test: 0 times, data was already available when the signaler run
   cond_test: 0 times, the waiter was in an unexpected state when the signaler 
ran
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         3        3
   mxordblk    7a7f8    787f8
   uordblks     2b3c     2b3c
   fordblks    7e4c0    7e4c0
   
   user_main: pthread_exit() test
   pthread_exit_test: Started pthread_exit_main at PID=23
   pthread_exit_main 23: Starting pthread_exit_thread
   pthread_exit_main 23: Sleeping for 5 seconds
   pthread_exit_thread 24: Sleeping for 10 second
   pthread_exit_main 23: Calling pthread_exit()
   pthread_exit_thread 24: Still running...
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         3        4
   mxordblk    787f8    767f8
   uordblks     2b3c     4b44
   fordblks    7e4c0    7c4b8
   
   user_main: pthread_rwlock test
   pthread_rwlock: Initializing rwlock
   pthread_exit_thread 24: Exiting
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         4        5
   mxordblk    767f8    747f8
   uordblks     4b44     3b4c
   fordblks    7c4b8    7d4b0
   
   user_main: pthread_rwlock_cancel test
   pthread_rwlock_cancel: Starting test
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         5        2
   mxordblk    747f8    7cff8
   uordblks     3b4c     2334
   fordblks    7d4b0    7ecc8
   
   user_main: timed wait test
   thread_waiter: Initializing mutex
   timedwait_test: Initializing cond
   timedwait_test: Starting waiter
   timedwait_test: Set thread 2 priority to 177
   thread_waiter: Taking mutex
   thread_waiter: Starting 5 second wait for condition
   timedwait_test: Joining
   thread_waiter: pthread_cond_timedwait timed out
   thread_waiter: Releasing mutex
   thread_waiter: Exit with status 0x12345678
   timedwait_test: waiter exited with result=0x12345678
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         2        3
   mxordblk    7cff8    7a7f8
   uordblks     2334     2b3c
   fordblks    7ecc8    7e4c0
   
   user_main: message queue test
   mqueue_test: Starting receiver
   mqueue_test: Set receiver priority to 128
   receiver_thread: Starting
   mqueue_test: Starting sender
   mqueue_test: Set sender thread priority to 64
   mqueue_test: Waiting for sender to complete
   sender_thread: Starting
   receiver_thread: mq_receive succeeded on msg 0
   sender_thread: mq_send succeeded on msg 0
   receiver_thread: mq_receive succeeded on msg 1
   sender_thread: mq_send succeeded on msg 1
   receiver_thread: mq_receive succeeded on msg 2
   sender_thread: mq_send succeeded on msg 2
   receiver_thread: mq_receive succeeded on msg 3
   sender_thread: mq_send succeeded on msg 3
   receiver_thread: mq_receive succeeded on msg 4
   sender_thread: mq_send succeeded on msg 4
   receiver_thread: mq_receive succeeded on msg 5
   sender_thread: mq_send succeeded on msg 5
   receiver_thread: mq_receive succeeded on msg 6
   sender_thread: mq_send succeeded on msg 6
   receiver_thread: mq_receive succeeded on msg 7
   sender_thread: mq_send succeeded on msg 7
   receiver_thread: mq_receive succeeded on msg 8
   sender_thread: mq_send succeeded on msg 8
   receiver_thread: mq_receive succeeded on msg 9
   sender_thread: mq_send succeeded on msg 9
   sender_thread: returning nerrors=0
   mqueue_test: Killing receiver
   receiver_thread: mq_receive interrupted!
   receiver_thread: returning nerrors=0
   mqueue_test: Canceling receiver
   mqueue_test: receiver has already terminated
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         3        4
   mxordblk    7a7f8    74ff8
   uordblks     2b3c     6344
   fordblks    7e4c0    7acb8
   
   user_main: timed message queue test
   timedmqueue_test: Starting sender
   timedmqueue_test: Waiting for sender to complete
   sender_thread: Starting
   sender_thread: mq_timedsend succeeded on msg 0
   sender_thread: mq_timedsend succeeded on msg 1
   sender_thread: mq_timedsend succeeded on msg 2
   sender_thread: mq_timedsend succeeded on msg 3
   sender_thread: mq_timedsend succeeded on msg 4
   sender_thread: mq_timedsend succeeded on msg 5
   sender_thread: mq_timedsend succeeded on msg 6
   sender_thread: mq_timedsend succeeded on msg 7
   sender_thread: mq_timedsend succeeded on msg 8
   sender_thread: mq_timedsend 9 timed out as expected
   sender_thread: returning nerrors=0
   timedmqueue_test: Starting receiver
   timedmqueue_test: Waiting for receiver to complete
   receiver_thread: Starting
   receiver_thread: mq_timedreceive succeed on msg 0
   receiver_thread: mq_timedreceive succeed on msg 1
   receiver_thread: mq_timedreceive succeed on msg 2
   receiver_thread: mq_timedreceive succeed on msg 3
   receiver_thread: mq_timedreceive succeed on msg 4
   receiver_thread: mq_timedreceive succeed on msg 5
   receiver_thread: mq_timedreceive succeed on msg 6
   receiver_thread: mq_timedreceive succeed on msg 7
   receiver_thread: mq_timedreceive succeed on msg 8
   receiver_thread: Receive 9 timed out as expected
   receiver_thread: returning nerrors=0
   timedmqueue_test: Test complete
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         4        3
   mxordblk    74ff8    78ff8
   uordblks     6344     433c
   fordblks    7acb8    7ccc0
   
   user_main: sigprocmask test
   sigprocmask_test: SUCCESS
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         3        3
   mxordblk    78ff8    78ff8
   uordblks     433c     433c
   fordblks    7ccc0    7ccc0
   
   user_main: signal handler test
   sighand_test: Initializing semaphore to 0
   sighand_test: Unmasking SIGCHLD
   sighand_test: Registering SIGCHLD handler
   sighand_test: Starting waiter task
   sighand_test: Started waiter_main pid=41
   waiter_main: Waiter started
   waiter_main: Unmasking signal 32
   waiter_main: Registering signal handler
   waiter_main: oact.sigaction=0 oact.sa_flags=0 oact.sa_mask=0000000000000000
   waiter_main: Waiting on semaphore
   sighand_test: Signaling pid=41 with signo=32 sigvalue=42
   waiter_main: sem_wait() successfully interrupted by signal
   waiter_main: done
   sighand_test: done
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         3        3
   mxordblk    78ff8    78ff8
   uordblks     433c     433c
   fordblks    7ccc0    7ccc0
   
   user_main: nested signal handler test
   signest_test: Starting signal waiter task at priority 101
   waiter_main: Waiter started
   waiter_main: Setting signal mask
   waiter_main: Registering signal handler
   waiter_main: Waiting on semaphore
   signest_test: Started waiter_main pid=42
   signest_test: Starting interfering task at priority 102
   interfere_main: Waiting on semaphore
   signest_test: Started interfere_main pid=43
   signest_test: Simple case:
     Total signalled 1240  Odd=620 Even=620
     Total handled   1240  Odd=620 Even=620
     Total nested    0    Odd=0   Even=0
   signest_test: With task locking
     Total signalled 2480  Odd=1240 Even=1240
     Total handled   2480  Odd=1240 Even=1240
     Total nested    0    Odd=0   Even=0
   signest_test: With intefering thread
     Total signalled 3720  Odd=1860 Even=1860
     Total handled   3720  Odd=1860 Even=1860
     Total nested    0    Odd=0   Even=0
   signest_test: done
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         3        4
   mxordblk    78ff8    74ff8
   uordblks     433c     6344
   fordblks    7ccc0    7acb8
   
   user_main: POSIX timer test
   timer_test: Initializing semaphore to 0
   timer_test: Unmasking signal 32
   timer_test: Registering signal handler
   timer_test: oact.sigaction=0xc000734a oact.sa_flags=0 
oact.sa_mask=2aaaaaaaaaaaaaaa
   timer_test: Creating timer
   timer_test: Starting timer
   timer_test: Waiting on semaphore
   timer_expiration: Received signal 32
   timer_expiration: sival_int=42
   timer_expiration: si_code=2 (SI_TIMER)
   timer_expiration: ucontext=0
   timer_test: sem_wait() successfully interrupted by signal
   timer_test: g_nsigreceived=1
   timer_test: Waiting on semaphore
   timer_expiration: Received signal 32
   timer_expiration: sival_int=42
   timer_expiration: si_code=2 (SI_TIMER)
   timer_expiration: ucontext=0
   timer_test: sem_wait() successfully interrupted by signal
   timer_test: g_nsigreceived=2
   timer_test: Waiting on semaphore
   timer_expiration: Received signal 32
   timer_expiration: sival_int=42
   timer_expiration: si_code=2 (SI_TIMER)
   timer_expiration: ucontext=0
   timer_test: sem_wait() successfully interrupted by signal
   timer_test: g_nsigreceived=3
   timer_test: Waiting on semaphore
   timer_expiration: Received signal 32
   timer_expiration: sival_int=42
   timer_expiration: si_code=2 (SI_TIMER)
   timer_expiration: ucontext=0
   timer_test: sem_wait() successfully interrupted by signal
   timer_test: g_nsigreceived=4
   timer_test: Waiting on semaphore
   timer_expiration: Received signal 32
   timer_expiration: sival_int=42
   timer_expiration: si_code=2 (SI_TIMER)
   timer_expiration: ucontext=0
   timer_test: sem_wait() successfully interrupted by signal
   timer_test: g_nsigreceived=5
   timer_test: Deleting timer
   timer_test: done
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         4        4
   mxordblk    74ff8    74ff8
   uordblks     6344     6344
   fordblks    7acb8    7acb8
   
   user_main: round-robin scheduler test
   rr_test: Set thread priority to 1
   rr_test: Set thread policy to SCHED_RR
   rr_test: Starting first get_primes_thread
            First get_primes_thread: 44
   rr_test: Starting second get_primes_thread
            Second get_primes_thread: 45
   rr_test: Waiting for threads to complete -- this should take awhile
            If RR scheduling is working, they should start and complete at
            about the same time
   get_primes_thread id=1 started, looking for primes < 10000, doing 10 run(s)
   get_primes_thread id=1 finished, found 1230 primes, last one was 9973
   get_primes_thread id=2 started, looking for primes < 10000, doing 10 run(s)
   get_primes_thread id=2 finished, found 1230 primes, last one was 9973
   rr_test: Done
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         4        4
   mxordblk    74ff8    787f8
   uordblks     6344     3344
   fordblks    7acb8    7dcb8
   
   user_main: barrier test
   barrier_test: Initializing barrier
   barrier_test: Thread 0 created
   barrier_test: Thread 1 created
   barrier_test: Thread 2 created
   barrier_test: Thread 3 created
   barrier_test: Thread 4 created
   barrier_test: Thread 5 created
   barrier_test: Thread 6 created
   barrier_test: Thread 7 created
   barrier_func: Thread 0 started
   barrier_func: Thread 1 started
   barrier_func: Thread 2 started
   barrier_func: Thread 3 started
   barrier_func: Thread 4 started
   barrier_func: Thread 5 started
   barrier_func: Thread 6 started
   barrier_func: Thread 7 started
   barrier_func: Thread 0 calling pthread_barrier_wait()
   barrier_func: Thread 1 calling pthread_barrier_wait()
   barrier_func: Thread 2 calling pthread_barrier_wait()
   barrier_func: Thread 3 calling pthread_barrier_wait()
   barrier_func: Thread 4 calling pthread_barrier_wait()
   barrier_func: Thread 5 calling pthread_barrier_wait()
   barrier_func: Thread 6 calling pthread_barrier_wait()
   barrier_func: Thread 7 calling pthread_barrier_wait()
   barrier_func: Thread 7, back with status=PTHREAD_BARRIER_SERIAL_THREAD (I AM 
SPECIAL)
   barrier_func: Thread 0, back with status=0 (I am not special)
   barrier_func: Thread 1, back with status=0 (I am not special)
   barrier_func: Thread 2, back with status=0 (I am not special)
   barrier_func: Thread 3, back with status=0 (I am not special)
   barrier_func: Thread 4, back with status=0 (I am not special)
   barrier_func: Thread 5, back with status=0 (I am not special)
   barrier_func: Thread 6, back with status=0 (I am not special)
   barrier_func: Thread 7 done
   barrier_func: Thread 0 done
   barrier_test: Thread 0 completed with result=0
   barrier_func: Thread 1 done
   barrier_test: Thread 1 completed with result=0
   barrier_func: Thread 2 done
   barrier_test: Thread 2 completed with result=0
   barrier_func: Thread 3 done
   barrier_test: Thread 3 completed with result=0
   barrier_func: Thread 4 done
   barrier_test: Thread 4 completed with result=0
   barrier_func: Thread 5 done
   barrier_test: Thread 5 completed with result=0
   barrier_func: Thread 6 done
   barrier_test: Thread 6 completed with result=0
   barrier_test: Thread 7 completed with result=0
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         4       10
   mxordblk    787f8    6c7f8
   uordblks     3344     6374
   fordblks    7dcb8    7ac88
   
   user_main: scheduler lock test
   sched_lock: Starting lowpri_thread at 97
   sched_lock: Set lowpri_thread priority to 97
   sched_lock: Starting highpri_thread at 98
   sched_lock: Set highpri_thread priority to 98
   sched_lock: Waiting...
   sched_lock: PASSED No pre-emption occurred while scheduler was locked.
   sched_lock: Starting lowpri_thread at 97
   sched_lock: Set lowpri_thread priority to 97
   sched_lock: Starting highpri_thread at 98
   sched_lock: Set highpri_thread priority to 98
   sched_lock: Waiting...
   sched_lock: PASSED No pre-emption occurred while scheduler was locked.
   sched_lock: Finished
   
   End of test memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks        10        4
   mxordblk    6c7f8    787f8
   uordblks     6374     3344
   fordblks    7ac88    7dcb8
   
   user_main: vfork() test
   vfork_test: Child 63 ran successfully
   
   Final memory usage:
   VARIABLE  BEFORE   AFTER
   ======== ======== ========
   arena       80ffc    80ffc
   ordblks         2        3
   mxordblk    7cff8    78ff8
   uordblks     23ec     433c
   fordblks    7ec10    7ccc0
   user_main: Exiting
   ostest_main: Exiting with status 0
   nsh>
   nsh>
   
   ```
   


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