Date: Sun, 13 Jul 1997 17:11:49 -0400 From: Randall Hopper <rhh@ct.picker.com> To: Amancio Hasty <hasty@rah.star-gate.com> Cc: multimedia@freebsd.org Subject: guspnp9: /dev/dsp close() hangs Message-ID: <19970713171149.34096@ct.picker.com>
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Well, first thanks for your previous work on the lock-ups! I haven't
crashed my machine Ctrl-Cing audio apps yet and I've sure been trying. :-)
A related problem I am seeing though is that about 20% of the time,
Ctrl-Cing a /dev/dsp play app causes the sound driver to block inside of
close(). It doesn't hang the machine (thank goodness), just the app.
E.g. with mpg123:
----> THESE LINES REPEAT (WRITE AUDIO DATA UNTIL DONE...):
566 mpg123 RET read 8192/0x2000
566 mpg123 CALL write(0x4,0x34000,0x8000)
566 mpg123 GIO fd 4 wrote 32768 bytes
----> CTRL-C HIT HERE...TRY TO CLOSE-UP SHOP:
566 mpg123 RET write 32768/0x8000
566 mpg123 CALL write(0x4,0x34000,0x8000)
566 mpg123 PSIG SIGINT caught handler=0x2a10 mask=0x0 code=0x0
566 mpg123 RET write -1 errno 4 Interrupted system call
566 mpg123 CALL sigreturn(0xefbfcae8)
566 mpg123 RET sigreturn JUSTRETURN
566 mpg123 CALL close(0x3)
566 mpg123 RET close 0
566 mpg123 CALL write(0x2,0xefbfcc64,0x28)
566 mpg123 GIO fd 2 wrote 40 bytes
"[0:01] Decoding of things.mp2 finished.
"
566 mpg123 RET write 40/0x28
566 mpg123 CALL gettimeofday(0xefbfd3a4,0)
566 mpg123 RET gettimeofday 0
566 mpg123 CALL write(0x4,0x34000,0xa00)
566 mpg123 GIO fd 4 wrote 2560 bytes
<much raw data omitted here>
566 mpg123 RET write 2560/0xa00
566 mpg123 CALL close(0x4)
----> WE'RE NOW BLOCKED WAITING ON /DEV/DSP CLOSE...IT DOESN'T COME BACK
----> CTRL-C HIT AGAIN
566 mpg123 PSIG SIGINT caught handler=0x2a10 mask=0x0 code=0x0
566 mpg123 RET close 0
566 mpg123 CALL sigreturn(0xefbfd334)
566 mpg123 RET sigreturn JUSTRETURN
566 mpg123 CALL exit(0)
Hope this helps. If you need more info, let me know.
Thanks,
Randall
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