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Re: signal handling different in 1.8.3 than 1.8.1?
From: |
Ludovic Courtès |
Subject: |
Re: signal handling different in 1.8.3 than 1.8.1? |
Date: |
Sat, 07 Jun 2008 12:38:50 +0200 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.1 (gnu/linux) |
Hi,
Gregory Marton <address@hidden> writes:
> As these are asynchronous, (alarm 10) could actually set off the alarm
> at any time after ten seconds. Is it still possible to write
> with-timeout?
[...]
> To put it another way, I sure would like to have some guarantees about
> when some asynchronous things will happen. Even with the (sleep 1)s,
> my with-timeout test cases fail.
That's a good question. Technically, all blocking calls like `sleep'
and `select' (anything that calls `scm_std_select ()') run the system
asyncs. The evaluator also runs them periodically, typically anytime a
procedure is invoked (look for `SCM_TICK' in `CEVAL ()'). So, normally,
system asyncs should be run "as soon as possible".
The `(statprof)' module in Guile-Library, for instance, uses a SIGPROF
handler to do statistical profiling. Now, it's unclear what latency
there is between signal delivery and handler invocation, and it's
unclear what influences it...
Thoughts?
Thanks,
Ludovic.
- signal handling different in 1.8.3 than 1.8.1?, Gregory Marton, 2008/06/01
- Re: signal handling different in 1.8.3 than 1.8.1?, Ludovic Courtès, 2008/06/03
- Re: signal handling different in 1.8.3 than 1.8.1?, Gregory Marton, 2008/06/03
- Re: signal handling different in 1.8.3 than 1.8.1?, Ludovic Courtès, 2008/06/03
- Re: signal handling different in 1.8.3 than 1.8.1?, Gregory Marton, 2008/06/06
- Re: signal handling different in 1.8.3 than 1.8.1?, Gregory Marton, 2008/06/06
- Re: signal handling different in 1.8.3 than 1.8.1?,
Ludovic Courtès <=
- Message not available
- Message not available
- Re: signal handling different in 1.8.3 than 1.8.1?, Gregory Marton, 2008/06/27
- Re: signal handling different in 1.8.3 than 1.8.1?, Ludovic Courtès, 2008/06/28
- Re: signal handling different in 1.8.3 than 1.8.1?, Gregory Marton, 2008/06/29
- Re: signal handling different in 1.8.3 than 1.8.1?, Gregory Marton, 2008/06/29
- Re: signal handling different in 1.8.3 than 1.8.1?, Gregory Marton, 2008/06/29
- Re: signal handling different in 1.8.3 than 1.8.1?, Ludovic Courtès, 2008/06/30