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List:       sox-devel
Subject:    [SoX-devel] [ sox-Bugs-3529005 ] sox gets unkillable with 100% CPU
From:       SourceForge.net <noreply () sourceforge ! net>
Date:       2012-05-23 7:45:20
Message-ID: E1SX6G2-0008Uu-4r () sfs-ml-3 ! v29 ! ch3 ! sourceforge ! com
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Bugs item #3529005, was opened at 2012-05-23 00:45
Message generated for change (Tracker Item Submitted) made by yurivict
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=110706&aid=3529005&group_id=10706

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Yuri (yurivict)
Assigned to: Nobody/Anonymous (nobody)
Summary: sox gets unkillable with 100% CPU

Initial Comment:
I am running sox to record wav from the audio device on FreeBSD 9.0-STABLE amd64.
When during this process system gets very busy and slow, sox is likely to get into \
100% CPU and can't be killed with 'kill' (SIGTERM) or Ctrl-C (SIGINT). Since it is \
unkillable by SIGINT/SIGTERM, I assume sox handles signals and ignores them. I was \
only able to kill it with kill -9 which left invalid wav file (which is natural with \
kill -9).

When the system slows down it probably produces fewer sound samples than expected, \
which triggers the problem in sox.

Such sox behavior is wrong. It should never cycle with 100% CPU and gets unkillable \
no matter what sound input it gets.

I also think that Input (alsa) that sox prints is wrong since FreeBSD doesn't support \
alsa. It is either OSS or pulseaudio.

--- output of top ---
  PID USERNAME      THR PRI NICE   SIZE    RES STATE   C   TIME   WCPU COMMAND
63966 yuri            1 103    0   147M  9156K CPU6    6   5:33 100.00% sox

--- console ---
Input File     : 'default' (alsa)
Channels       : 1
Sample Rate    : 48000
Precision      : 16-bit
Sample Encoding: 16-bit Signed Integer PCM

In:0.00% 00:16:07.51 [00:00:00.00] Out:46.4M [ -====|====- ]        Clip:0    \
^C^C^C^C^C^C^C^C^C^C^C^C^C (doesn't die)



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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=110706&aid=3529005&group_id=10706

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