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Re: Parallelism a la make -j <n> / GNU parallel
From: |
Mike Frysinger |
Subject: |
Re: Parallelism a la make -j <n> / GNU parallel |
Date: |
Sat, 5 May 2012 00:28:32 -0400 |
User-agent: |
KMail/1.13.7 (Linux/3.3.4; KDE/4.6.5; x86_64; ; ) |
On Friday 04 May 2012 16:17:02 Chet Ramey wrote:
> On 5/4/12 2:53 PM, Mike Frysinger wrote:
> > it might be a little racy (wrt checking cnt >= 10 and then doing a wait),
> > but this is good enough for some things. it does lose visibility into
> > which pids are live vs reaped, and their exit status, but i more often
> > don't care about that ...
>
> What version of bash did you test this on? Bash-4.0 is a little different
> in how it treats the SIGCHLD trap.
bash-4.2_p28. wait returns 145 (which is SIGCHLD).
> Would it be useful for bash to set a shell variable to the PID of the just-
> reaped process that caused the SIGCHLD trap? That way you could keep an
> array of PIDs and, if you wanted, use that variable to keep track of live
> and dead children.
we've got associative arrays now ... we could have one which contains all the
relevant info:
declare -A BASH_CHILD_STATUS=(
["pid"]=1234
["status"]=1 # WEXITSTATUS()
["signal"]=13 # WTERMSIG()
)
makes it easy to add any other fields people might care about ...
-mike
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- Re: Parallelism a la make -j <n> / GNU parallel, (continued)
- Re: Parallelism a la make -j <n> / GNU parallel, John Kearney, 2012/05/04
- Re: Parallelism a la make -j <n> / GNU parallel, Mike Frysinger, 2012/05/04
- Re: Parallelism a la make -j <n> / GNU parallel, John Kearney, 2012/05/04
- Re: Parallelism a la make -j <n> / GNU parallel, Mike Frysinger, 2012/05/05
- Re: Parallelism a la make -j <n> / GNU parallel, Andreas Schwab, 2012/05/05
- Re: Parallelism a la make -j <n> / GNU parallel, Chet Ramey, 2012/05/07
- Re: Parallelism a la make -j <n> / GNU parallel, John Kearney, 2012/05/05
- Re: Parallelism a la make -j <n> / GNU parallel, Mike Frysinger, 2012/05/06
- Re: Parallelism a la make -j <n> / GNU parallel, John Kearney, 2012/05/06
- Re: Parallelism a la make -j <n> / GNU parallel, Chet Ramey, 2012/05/04
- Re: Parallelism a la make -j <n> / GNU parallel,
Mike Frysinger <=
- Re: Parallelism a la make -j <n> / GNU parallel, John Kearney, 2012/05/05
- Re: Parallelism a la make -j <n> / GNU parallel, Mike Frysinger, 2012/05/06
- Re: Parallelism a la make -j <n> / GNU parallel, John Kearney, 2012/05/06
- Re: Parallelism a la make -j <n> / GNU parallel, Mike Frysinger, 2012/05/06
- Re: Parallelism a la make -j <n> / GNU parallel, Chet Ramey, 2012/05/07
- Re: Parallelism a la make -j <n> / GNU parallel, Chet Ramey, 2012/05/07
- Re: Parallelism a la make -j <n> / GNU parallel, Chet Ramey, 2012/05/07
- Re: Parallelism a la make -j <n> / GNU parallel, Mike Frysinger, 2012/05/11
Re: Parallelism a la make -j <n> / GNU parallel, Ben Pfaff, 2012/05/05
Re: Parallelism a la make -j <n> / GNU parallel, Ole Tange, 2012/05/11